User’s Guide
HP E4419B Power Meter
HP Part no. E4419-90006
December, 1998
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Legal Information
Legal Information
Notice
Information contained in this document is subject to change without
notice. Hewlett-Packard makes no warranty of any kind with regard to
this material, including, but not limited to, the implied warranties of
merchantability and fitness for a particular purpose. Hewlett-Packard
shall not be liable for errors contained herein or for incidental or
consequential damages in connection with the furnishings, performance,
or use of this material. No part of this document may be photocopied,
reproduced, or translated to another language without the prior written
consent of HP.
Certification
Hewlett-Packard Company certifies that this product met its published
specifications at the time of shipment from the factory. Hewlett-Packard
further certifies that its calibration measurements are traceable to the
United States National Institute of Standards and Technology, to the
extent allowed by the Institute’s calibration facility, and to the calibration
facilities of other International Standards Organization members.
Warranty
This Hewlett-Packard instrument product is warranted against defects in
material and workmanship for a period of one year from date of shipment.
During the warranty period, Hewlett-Packard Company will at its option,
either repair or replace products which prove to be defective. For warranty
service or repair, this product must be returned to a service facility
designated by HP. Buyer shall prepay shipping charges to HP and HP
shall pay shipping charges, duties, and taxes for products returned to HP
from another country. HP warrants that its software and firmware
designated by HP for use with an instrument will execute its
programming instructions when properly installed on that instrument.
HP does not warrant that the operation of the instrument, or firmware
will be uninterrupted or error free.
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Legal Information
Limitation of Warranty
The foregoing warranty shall not apply to defects resulting from improper
or inadequate maintenance by Buyer, Buyer-supplied software or
interfacing, unauthorized modification or misuse, operation outside of the
environmental specifications for the product, or improper site preparation
or maintenance. NO OTHER WARRANTY IS EXPRESSED OR IMPLIED.
HP SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
Exclusive Remedies
THE REMEDIES PROVIDED HEREIN ARE BUYER’S SOLE AND
EXCLUSIVE REMEDIES. HP SHALL NOT BE LIABLE FOR ANY
DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES, WHETHER BASED ON CONTRACT, TORT, OR ANY
OTHER LEGAL THEORY.
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Equipment Operation
Equipment Operation
Warnings and Cautions
This guide uses warnings and cautions to denote hazards.
WARNING
Caution
A warning calls attention to a procedure, practice or the
like, which, if not correctly performed or adhered to, could
result in injury or the loss of life. Do not proceed beyond a
warning until the indicated conditions are fully
understood and met.
A caution calls attention to a procedure, practice or the like which,
if not correctly performed or adhered to, could result in damage to
or the destruction of part or all of the equipment. Do not proceed
beyond a caution until the indicated conditions are fully
understood and met.
Personal Safety Considerations
WARNING
This is a Safety Class I product (provided with a protective
earthing ground incorporated in the power cord). The
mains plug shall only be inserted in a socket outlet
provided with a protective earth contact. Any interruption
of the protective conductor, inside or outside the
instrument, is likely to make the instrument dangerous.
Intentional interruption is prohibited.
If this instrument is not used as specified, the protection
provided by the equipment could be impaired. This
instrument must be used in a normal condition (in which
all means of protection are intact) only.
No operator serviceable parts inside. Refer servicing to
qualified personnel. To prevent electrical shock, do not
remove covers.
For continued protection against fire hazard, replace the
line fuse(s) only with fuses of the same type and rating (for
example, normal blow, time delay, etc.). The use of other
fuses or material is prohibited.
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General Safety Considerations
General Safety Considerations
WARNING
Before this instrument is switched on, make sure it has
been properly grounded through the protective conductor
of the ac power cable to a socket outlet provided with
protective earth contact.
Any interruption of the protective (grounding) conductor,
inside or outside the instrument, or disconnection of the
protective earth terminal can result in personal injury.
Caution
Any adjustments or service procedures that require operation of
the instrument with protective covers removed should be
performed only by trained service personnel.
Markings
The CE mark shows that the product complies with
all the relevant European legal Directives (if
accompanied by a year, it signifies when the design
was proven.
This is the symbol of an Industrial Scientific and
Medical Group 1 Class A product.
GROUP 1
ISMCLASS A
The CSA mark is a registered trademark of the
Canadian Standards Association.
External Protective Earth Terminal.
While this is a Class I product, provided with a
protective earthing conductor in a power cord, an
external protective earthing terminal has also been
provided. This terminal is for use where the earthing
cannot be assured. At least an 18AWG earthing
conductor should be used in such an instance, to
ground the instrument to an assured earth terminal.
vi
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General Safety Considerations
IEC 1010-1 Compliance
This instrument has been designed and tested in accordance with IEC
Publication 61010-1 +A1:1992 Safety Requirements for Electrical
Equipment for Measurement, Control and Laboratory Use and has been
supplied in a safe condition. The instruction documentation contains
information and warnings which must be followed by the user to ensure
safe operation and to maintain the instrument in a safe condition.
Statement of Compliance
This product has been designed and tested for compliance with IEC 60529
(1989) Degrees of Protection Provided by Enclosures (IP Code). Level IPx4
is attained if, and only if, the carry case( part number HP 34141A) is
fitted.
User Environment
This product is designed for use in a sheltered environment (avoiding
extreme weather conditions) in accordance with Pollution Degree 3
defined in IEC 60664-1, with the carry case ( part number HP 34141A)
fitted over the instrument.
The product is suitable for indoor use only, when this carry case is not
fitted.
Installation Instructions
To avoid unnecessary over-temperature conditions, while this carry case is
fitted do not apply an ac mains supply voltage, only operate your
HP E4419B from the battery pack.
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Regulatory Information
Regulatory Information
Sound Emission
Herstellerbescheinigung
Diese Information steht im Zusammenhang mit den Anforderungen der
Maschinenlarminformationsverordnung vom 18 Januar 1991.
•
•
•
•
Sound Pressure LpA < 70 dB.
Am Arbeitsplatz.
Normaler Betrieb.
Nach DIN 45635 T. 19 (Typprufung).
Manufacturers Declaration
This statement is provided to comply with the requirements of the
German Sound DIN 45635 T. 19 (Typprufung).
•
•
•
•
Sound Pressure LpA < 70 dB.
At operator position.
Normal operation.
According to ISO 7779 (Type Test).
Australian EMC Regulations
The C-Tick mark is a registered trademark of the Spectrum Management
Agency of Australia. This signifies compliance with the Australian EMC
Framework Regulations under the terms of the Radiocommunications Act
of 1992.
viii
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Regulatory Information
Declaration of Conformity
according to ISO/IEC Guide 22 and EN45014
Manufacturer’s Name:
Manufacturer's Address:
Hewlett Packard Ltd.
Queensferry Microwave Division
South Queensferry
West Lothian, EH30 9TG
Scotland, United Kingdom
Declares that the product
Product Name:
Dual Channel Power Meter
HP E4419B
Model Numbers:
Product Options:
This declaration covers all options of the above products as detailed in
TCF A-5951-9852-02
Conforms with the protection requirements of European Council Directive 89/336/EEC on the approximation
of the laws of the member states relating to electromagnetic compatibility.
Against EMC test specifications EN 55011:1991 (Group 1, Class A) and EN 50082-1:1992
Electromagnetic Compatibility (EMC)
Technical Construction File (TCF) No. A-5951-9852-01
As Detailed in:
Assessed by:
Dti Appointed Competent Body
EMC Test Centre,
GEC-Marconi Avionics Ltd.,
Maxwell Building,
Donibristle Industrial Park,
KY11 5LB
Scotland, United Kingdom
Technical Report Number:6893/2200/CBR, dated 23 September 1997
Supplementary Information: The product conforms to the following safety standards
EN61010-1 (1993) / IEC 1010-1 (1990) + A1 (1992)
CSA-C22.2 No. 1010.1-92
EN60825-1 (1994) / IEC 825-1 (1993)
The product herewith complies with the requirements of the Low Voltage Directive 73/23/EEC, and carries the
CE-marking accordingly. This product is also designed to meet IPx4 in accordance with IEC 60529:1989 / EN
60529:1992.
South Queensferry, Scotland
22 October 1998
R.M. Evans / Quality Manager
Location
Date
Europe Contact:
Your local Hewlett-Packard Sales and Service Office or Hewlett-Packard GmbH, Department 2Q /
Standards Europe, Herrenberger Strasse 130, D7030 Boblinger (Fax; +49-7031-143143).
HP E4419B User’s Guide
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List of Related Publications
List of Related Publications
The HP E4419B User’s Guide is also available in the following languages:
•
•
•
•
•
•
English Language User’s Guide - Standard
German Language User’s Guide - Option ABD
Spanish Language User’s Guide - Option ABE
French Language User’s Guide - Option ABF
Italian Language User’s Guide - Option ABZ
Japanese Language User’s Guide - Option ABJ
HP E4418B/E4419B Programming Guide is shipped as standard.
HP E4418B/E4419B Service Guide is available by ordering Option 915.
HP E4418B/E4419B CLIPs (Component Location and Information Pack)
is available by ordering E4418-90031.
Useful information on SCPI (Standard Commands for Programmable
Instruments) can be found in:
•
A Beginner’s Guide to SCPI, which is available by ordering
HP Part Number 5010-7166.
•
The SCPI reference manuals which are available from:
SCPI Consortium,
8380 Hercules Drive, Suite P3,
La Mesa, CA 91942, USA.
Telephone: 619-697-4301
Fax: 619-697-5955
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HP E4419B Options
HP E4419B Options
The HP E4419B power meters have the following options available:
•
Option 001, supplies an internal rechargeable battery providing
full instrument functionality when access to an ac power outlet is
not available.
•
•
Option 002, supplies parallel rear panel sensor input(s). The
power reference oscillator output is on the front panel.
Option 003, supplies parallel rear panel sensor input(s). The
power reference oscillator output is also on the rear panel.
•
•
•
•
•
•
Option 004, deletes the HP 11730A sensor cable(s) provided.
Option 0BO, deletes manual set.
Option 908, provides rackmount kit for one instrument.
Option 909, provides rackmount kit for two instruments.
Option 915, provides the HP E4418B/E4419B Service Guide.
Option 916, provides an additional HP E4419B User’s Guide and
HP E4418B/E4419B Programming Guide.
•
•
Option 1BN, provides MIL-STD 45662A, Certificate of
Calibration.
Option 1BP, provides MIL-STD-45662A, Certificate of Calibration
and data.
Available Accessories
•
•
•
•
HP 34161A Accessory Pouch
HP 34141A Yellow soft carry/operating case
HP 34131A basic instrument transit case
HP E9287A Spare battery pack - for instruments fitted with
option 001 only
•
•
HP 34397A 12 Vdc to 115 Vac inverter (Option 0E3 230 V)
The following HP power sensor cables are available:
■
■
■
■
■
■
HP 11730A 1.5 m (7.5 ft)
HP 11730B 3 m (10 ft)
HP 11730C 6.1 m (20 ft)
HP 11730D 15.2 m (50 ft)
HP 11730E 30.5 m (100 ft)
HP 11730F 61 m (200 ft)
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About this Guide
About this Guide
Chapter 1: Getting Started
This chapter prepares the power meter for use and helps you to get
familiar with a few of the front panel features.
Chapter 2: Power Meter Operation
This chapter gives a detailed description of the capabilities and operation
of the power meter. You will find this chapter useful when you are
operating the power meter from the front panel.
Chapter 3: Menu Map Reference
This chapter details diagrammatically the menu maps for the power
meter. It also gives a description of all the power meter’s keys.
Chapter 4: Error Messages
This chapter lists the error messages that may appear as you are working
with the power meter. Each description contains information to help you
diagnose and solve the problem.
Chapter 5: Specifications
This chapter lists the power meter’s specifications and describes how to
interpret these specifications.
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Sound Emission ...................................................................viii
Getting Started.................................................................................... 1-1
Window Symbols........................................................................... 1-14
Warning Symbol ..................................................................... 1-14
Confirmation Window ............................................................ 1-14
Wait Symbol............................................................................ 1-14
1 of N Entry Window.............................................................. 1-15
Numeric or Alphanumeric Entry Window ............................ 1-15
HP E4419B User’s Guide
Contents-1
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Battery Removal/Replacement .............................................. 2-5
Zeroing the Power Meter........................................................ 2-7
Calibration Procedure Using HP E-Series
Power Sensors......................................................................... 2-9
Procedure ................................................................................ 2-17
Offset Tables ................................................................................. 2-27
Selecting Units of Measurement from the Softkeys ................... 2-33
Making Relative Measurements .................................................. 2-34
Procedure ................................................................................ 2-34
Setting the Resolution .................................................................. 2-35
Setting Offsets............................................................................... 2-36
Setting Channel Offsets......................................................... 2-36
Contents-2
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Self Test......................................................................................... 2-66
Contacting Hewlett-Packard........................................................ 2-74
Before calling Hewlett-Packard............................................. 2-74
Returning Your Power Meter for Service.............................. 2-80
Menu Reference................................................................................... 3-1
The Front Panel Menu Maps ....................................................... 3-3
dBm/W Menu.......................................................................... 3-3
Frequency/Cal Fac Menu ....................................................... 3-4
Meas Setup Menu................................................................... 3-5
Rel/Offset Menu...................................................................... 3-6
Save/Recall Menu ................................................................... 3-6
HP E4419B User’s Guide
Contents-3
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System Inputs Menu (2 of 4).................................................. 3-8
System Inputs Menu (3 of 4).................................................. 3-9
Front Panel Menu Reference........................................................ 3-12
Diagrammatical Hardkeys..................................................... 3-36
Error Messages .................................................................................... 4-1
Specifications....................................................................................... 5-1
General .......................................................................................... 5-16
Dimensions ............................................................................. 5-16
Weight..................................................................................... 5-16
Safety ...................................................................................... 5-16
Non-Volatile Memory ............................................................. 5-17
Contents-4
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2-18
2-19
2-20
2-21
2-22
2-23
4-1
Interface Overview Examples................................................... 2-57
Test Setup for Recording Swept Measurements...................... 2-59
“Save/Recall” Screen.................................................................. 2-62
How Measurements are Calculated.......................................... 2-63
Replacing the Fuse .................................................................... 2-73
Error Annunciator Position....................................................... 4-2
HP E4419B User’s Guide
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Contents-6
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TTL Inputs Control Logic.......................................................... 2-12
TTL Inputs Timing Diagram 2 ................................................. 2-14
Range of Values for Window Limits ......................................... 2-45
Zero Set Specifications .............................................................. 5-4
Noise Multiplier......................................................................... 5-7
Power Sensor Specifications...................................................... 5-8
Settling Time ............................................................................. 5-9
Settling Time ............................................................................. 5-10
2-2
2-4
2-5
2-6
5-1
5-2
5-3
5-4
5-5
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Getting Started
Introduction
Introduction
One of the first things you will want to do with your power meter is to
switch it on and become acquainted with its front panel. The sections in
this chapter prepare the power meter for use and help you get familiar
with some of the front panel operations.
The front panel consists of both hardkeys and softkeys which allow you to
select various functions and operations. When some hardkeys are selected
the corresponding softkey labels are displayed on the power meter display.
If you are using the power meter remotely refer to the HP E4418B/4419B
Programming Guide for remote operating details.
1-2
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Getting Started
Turning On the Power Meter
Turning On the Power Meter
The following steps show you how to turn on the power meter and verify
that it is operating correctly.
1. Connect the power cord and turn on the power meter.
The front panel display and the green power LED light up when
the power meter is switched on. The power meter performs it’s
power on self test. If the self test is not successful the error
annunciator turns on. If this occurs contact your Hewlett-Packard
Sales and Service office for instructions on returning the power
meter to Hewlett-Packard for service.
Caution
Caution
Note
This instrument is designed for use in Installation Category II and
Pollution Degree 2 per IEC 1010 and 664 respectively.
This instrument has an autoranging line voltage input, be sure
the supply voltage is within the range of 85 to 264 V .
ac
If the power meter has been stored at extremely low temperatures
outwith the operating range of the power meter, the display may
take a few minutes to operate.
2. Set the display contrast if required.
The display contrast is adjusted by pressing
these softkeys are not displayed press
and
. If
Prev
repeatedly until they
appear.
3. Connect the power sensors.
Connect one end of each of the sensor cables to the power meter’s
channel inputs and the other ends to the power sensors.
4. Making a measurement.
A minimum warm up time of 30 minutes is recommended before
accurate measurements can be made.
Prior to making your first measurement you must zero and
calibrate the sensor and meter combination. Refer to Chapter 2 for
further information if you are not familiar with zeroing,
calibrating or making measurements with a power meter.
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Getting Started
The Front Panel at a Glance
The Front Panel at a Glance
12
11
10
9
1
2
3
8
6
7
4
Preset
Local
5
1.
This hardkey allows you to preset the power meter if you are
currently working in local mode (that is, front panel operation). In
local mode a confirmation pop up window is displayed prior to a
preset being carried out. However, if you are in remote mode (that
is, HP-IB, RS232 or RS422 operation), then pressing this hardkey
places the power meter in local mode provided local lock out (LLO)
is not enabled.
2. Hardkeys relating to the display layout.
This hardkey allows you to select the upper or lower
measurement window on the power meter’s display. The window
which is selected is highlighted by a shadowed box. Any
measurement setup you create is implemented in the selected
window.
This hardkey allows you to choose either a one or a two
window display.
1-4
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Getting Started
The Front Panel at a Glance
3.
This hardkey switches the power meter between on and standby.
When the power meter is switched to standby (that is, when this
hardkey has not been selected but the line power is connected to
the instrument) the red LED is lit. When the power meter is
switched on the green LED is lit.
Option 001 Battery: On standby with the battery installed and the
4. “System/Inputs” hardkey with softkey menu.
System
Inputs
The
hardkey allows access to softkey menus which affect
the general power meter system setup, (for example the HP-IB
address) and also to softkey menus which effect the setup of the
channel inputs. Refer to Chapter 3 for further information about
this hardkey and it’s softkey menu.
Save
Recall
5.
This hardkey is the only one that is completely dedicated to the
control of the power meter as a system. The only other hardkey
System
Inputs
which affects system parameters is the
hardkey. Refer to
Chapter 3 for further information about this hardkey and it’s
softkey menu.
6. Dedicated “Window” hardkeys with softkey menus.
Meas
Setup
Rel
Offset
dBm/W
,
,
These hardkeys allow access to softkey menus which affect the
setup of the measurement windows. Refer to Chapter 3 for further
7. Dedicated “Channel” hardkeys with softkey menus.
Frequency
Cal Fac
Zero
Cal
,
These hardkeys allow access to softkey menus which affect the
measurement channel. Refer to Chapter 3 for further information
about these hardkeys and their softkey menus.
8. Channel Inputs.
The HP E4419B has two sensor inputs. Power meters configured
with options 002 or 003 have the sensor inputs on the rear panel
and the front panel.
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Getting Started
The Front Panel at a Glance
9. POWER REF Output.
The power reference output is a 50 Ω type N connector. The output
signal of 1 mW at 50 MHz is used for calibrating the sensor and
the power reference on the rear panel.
10. Arrow hardkeys.
,
,
and
hardkeys allow you to move the
position of the cursor, select fields for editing, and edit
alphanumeric characters. Refer to Chapter 3 for further
information.
11. Menu related hardkeys.
More
This hardkey allows you to move through all pages of a
menu. The bottom right of the power meter display indicates the
number of pages in the menu. For example, if “1 of 2” is
More
More
displayed, pressing
moves you to “2 of 2”. Pressing
again moves you back to “1 of 2”.
Prev
This hardkey allows you to move back one level in the
Prev
softkey menu. Repeatedly pressing
accesses a menu which
allows you to increase and decrease the display contrast.
12. Softkeys.
These four keys are used to make a selection from the menus.
1-6
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Getting Started
The Display Layout
The Display Layout
The following figure details the display layout when two measurement
windows are displayed, one analog and one digital. However it is possible
using the
key to display just one measurement window.
15
14 13 12 1110
1
2
9
3
4
5
8
7
6
1. The status reporting line displays five fields, three associated with
either HP-IB, RS232 or RS422 status and two associated with
error and warning conditions. The first field displays either “RMT”
(remote, HP-IB, RS232 or RS422 operation) or “LCL” (local, front
panel operation).
For HP-IB operation, the second field displays “TLK” if the power
meter is addressed to talk or “LSN” if it is addressed to listen. The
third field indicates an “SRQ” (service request).
For RS232 and RS422 operation, the second field displays “RX”
when data is being received. The third field displays “TX” when the
power meter is transmitting data.
The fourth field indicates “ERR” for any error conditions. The last
field is used to report error and warning messages.
2. This field displays the channel setup being measured, either A, B,
A/B, B/A, A-B or B-A.
3. The measurement data is displayed in either one or two
rectangular windows depending on the setting of
. Pressing
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Getting Started
The Display Layout
allows you to toggle between a one or two window display.
When two windows are displayed and this hardkey is pressed the
single window then displayed is the one which was previously
highlighted with the shadowed box. On the two window display
the measurement setup menus work on the window which is
shadowed.
4. This is the measurement result field.
5. This field displays the units of measurement, either dBm, dB,
Watts or %.
6. This window is configured to show an analog meter which displays
the measurement result and the meter scaling.
7. This field displays the number of pages in the current softkey
menu. For example, “1 of 2” indicates that there are two pages of
More
softkeys and you are on the first page. Pressing
moves you
to page “2 of 2”.
8. Any softkeys available are displayed in these four fields.
9. This field displays the title of the menu. For example, when the
power meter is initially switched on the “Contrast” menu is
Zero
displayed, and, if you press
10. This field indicates if the measurement result is outwith the upper
or lower limits set. If the measurement is within the limits this
limit set, “Undr Lmt” is displayed. If the measurement result is
to “Setting Measurement Limits”, on page 2-43 for further
information.
Relative Measurements”, on page 2-34 for further information.
13. This field displays “Rng Hld” if a range is selected. Refer to
“Setting the Range”, on page 2-52 for further information.
14. This field displays “Dty Cyc” if a duty cycle is set. This allows you
to measure the power of a pulsed signal. Refer to “Measuring
Pulsed Signals”, on page 2-41 for further information.
15. Theinformation in this field is displayed on two lines and depends
on thecombination of sensor type, sensor calibration table and
frequency dependent offset table currently selected. Table 1-1
shows all the possible combinations for the two lines of the display.
Find the table entry which matches your display and use the
1-8
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Getting Started
The Display Layout
reference number in the left-hand column to look up Table 1-2 for
For example, the display shows:
50MHz
(10,C)
This is equivalent to reference number 4 in Table 1-1 and when
looked up in Table 1-2 shows that:
• the sensor type is 8480 series
• a sensor calibration table is selected (10)
• a frequency dependent offset table is selected(C).
Table 1-1
Reference
Number
Upper
Display Line
Lower
Display Line
1
2
3
4
5
6
CF:xxx.x%
CF:xxx.x%
xxx.xyHz
xxx.xyHz
xxx.xyHz
xxx.xyHz
xxx.xyHz(a)
(nn)
(nn,a)
(a)
Where “y” is the frequency multiplier (M or G), “nn” is the
sensor calibration table number and “a” is the frequency
dependent offset table letter.
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Getting Started
The Display Layout
Table 1-2
Reference
Number
Sensor
Series
Sensor
Correction
Frequency Dependent
Offset Correction
None
1
2
3
4
5
6
Directly entered
Calibration Factor
8480
Series
Sensors
From offset table
Frequency dependent None
- from selected sensor
calibration table
From offset table
Frequency dependent None
- downloaded directly
E-Series
Sensors
from sensor
From offset table
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Getting Started
The Display Layout
Selecting Your Display Layout
Your power meter display is extremely flexible. It can be used to display a
variety of different measurements and windows depending on your needs.
The following diagram details the various options available to you.
Display
Select using
Two Windows
Select using
One Window
Select using
, Input Select
Select using
Meas
Setup
Lower
Window
Upper
Window
Measurement Type
A, B, A/B, B/A,
A-B, B-A
Meas
Setup
Select using
, Display Format
, Input Select
Meas
Setup
Measurement Type
A, B, A/B, B/A,
A-B, B-A
Measurement Type
A, B, A/B, B/A,
A-B, B-A
Digital
Display
Analog
Display
Select using
Meas
Setup
, Display Format
Digital
Display
Analog
Display
Digital
Display
Analog
Display
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Getting Started
The Display Layout
Display Tutorial
If you wish to experiment with the display layout before you move on to
make measurements, the following procedure guides you through a few of
the display setups you can choose.
Preset
Local
Confirm
1.Press
,
.
Notice that the upper window is the
one which is highlighted by the dark
box.
2.Press
. The display remains the
same apart from the fact that it is now
the lower window that is highlighted
by the shadowed box.
Meas
Display Format
3.Press
,
,
Setup
Meter Dgtl Anlg
(Anlgshould be
highlighted). The display now shows
one analog and one digital window.
4.Press
. The display now only
shows one window. This is the analog
window which was selected in the
previous step.
5.Press
. The display now shows
only the digital window.
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Getting Started
The Display Layout
6. Press
. The display now shows
both an analog and digital window.
Meas
Setup
Input Select B/A
7. Press
,
,
.
Notice that the upper window is now
set up to make a channel B over
channel A ratio measurement.
8. Press
to select the lower window.
. Notice that the lower
A/B
Press
window is now set up to make a
channel A over channel B ratio
measurement.
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Getting Started
Window Symbols
Window Symbols
There are a number of different graphic symbols and pop up windows that
can occur on the power meter display. These can occur for a variety of
reasons such as when:
•
•
•
an error or warning occurs.
a confirmation is required.
you are required to wait while the power meter carries out a
procedure.
•
•
you are required to select an entry from a list.
you are required to enter an alphanumeric value.
Warning Symbol
The warning symbol is displayed either directly in the
measurement window or in a pop up window when such
an event occurs. A pop up window is displayed for
approximately two seconds. The text in the pop up
window gives details of the warning type. This symbol
may also appear on a measurement window, for example,
to indicate that a power sensor is not connected.
Confirmation Window
This pop up window is displayed when
Confirm
you are required to press
to
verify your previous selection. For
example, prior to a preset being
carried out.
Wait Symbol
The wait symbol is displayed when the power meter is carrying
out a procedure but no action is required from you. The symbol
may appear directly in the measurement window or in a pop up
window. It may appear, for example, during, zeroing or
calibration.
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Getting Started
Window Symbols
1 of N Entry Window
This pop up window is displayed when
you are required to select an entry using
and
from the list.
Numeric or Alphanumeric Entry
Window
This pop up window is displayed when
you are required to modify numeric or
alphanumeric data. The
keys move the position of the cursor.
The and keys increment and
and
decrement the alphanumeric digit on
which the cursor is currently
positioned.
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Getting Started
The Rear Panel at a Glance
The Rear Panel at a Glance
1
2
3
4
5
10 9
6
8
7
11
1. Channel A (Option 002 or 003 only)
2. Channel B (Option 002 or 003 only)
3. Power Ref (Option 003 only)
signal is used for calibrating the sensor meter combination.
4. Recorder Outputs
These outputs produces a dc voltage that corresponds to the power
level of the channel input. Refer to “Recorder Output”, on
page 2-59 for further information.
5. Power socket
This power meter has an auto configuring power supply. This
allows it to operate over a range of voltages without manually
being set to a certain voltage.
6. Fuse
An F3.15AH fuse is installed for all voltage supplies.
7. HP-IB
This connector allows the power meter to be controlled remotely
using the Hewlett-Packard Interface Bus.
8. RS232/422
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Getting Started
The Rear Panel at a Glance
This connector allows the power meter to be controlled remotely
using either the RS232 or RS422 serial interface standards.
9. Serial Label
Each power meter has it’s own individual identification number.
Refer to “Instrument serial numbers”, on page 2-75 for further
information.
10. Rmt I/O
This connector is an RJ-45 series shielded modular jack assembly.
It provides a TTL logic level output when a measurement exceeds
a predetermined limit. TTL inputs are also provided to initiate
zero and calibration cycles.
11. Ground Connector
Binding post, accepts 4 mm plug or bare-wire connection.
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Getting Started
Adjusting the Carrying Handle
Adjusting the Carrying Handle
To adjust the position, grasp the handle by the sides and pull outward.
Rotate the handle to the desired position.
Bench top viewing positions
Carrying position
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Getting Started
Rack Mounting the Power Meter
Rack Mounting the Power Meter
You can mount the power meter in a standard 19 inch rack cabinet using
one of three optional kits. Instructions and mounting hardware are
included with each rack mounting kit. Any HP System II instrument can
be rack mounted beside the HP E4419B power meter.
To rack mount the power meter:
1. Remove the handle by rotating it to the vertical position and
pulling the ends outward
2. Remove the rubber bumper by stretching a corner and sliding it
off.
Rear (bottom view)
Front
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Getting Started
Rack Mounting the Power Meter
To rack mount a single instrument, order option 908, or adapter kit
5063-9240.
To rack mount two instruments side by side, order option 909, or lock-link
kit 5061-9694 and flange kit 5063-9212.
To install one or two instruments in a sliding support shelf, order shelf
5063-9255, and slide kit 1494-0015 (for a single instrument, also order
filler panel 5002-3999).
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Power Meter Operation
Introduction
Introduction
•
•
•
“Zeroing and Calibrating the Power Meter”, on page 2-7.
“Calibrating the Power Meter”, on page 2-8.
•
•
•
on page 2-17.
“Making Measurements using Sensor Calibration Tables”, on
page 2-19.
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
“How Measurements are Calculated”, on page 2-63
“Presetting the Power Meter”, on page 2-64.
“Self Test”, on page 2-66.
“Operator Maintenance”, on page 2-73.
“Contacting Hewlett-Packard”, on page 2-74.
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Power Meter Operation
Battery Operation (Option 001)
Battery Operation (Option 001)
The battery option (001) allows the power meter to be used in operating
environments where there is no convenient access to an ac power source.
General Information
With the battery option installed and the power meter connected to an ac
in a controlled charge mode.
If the meter is powered up under battery power, or if ac power is lost while
connected to an ac source, a pop up window displays the message
“Running Under Battery Power”. When this screen is visible the backlight
mode (see “Backlight”, on page 2-4) is over-ridden and the backlight is on
Continue
continuously. Pressing the
previous screen.
softkey returns the display to the
Carry Case
A soft carry/operating case is available which makes it easy to transport
and operate your power meter in installation and maintenance
environments. To obtain a carry case order HP part number 34141A.
Caution
Do not attempt to recharge the power meter or operate the power
meter from an ac power source while it is contained in the carry
case.
Running Time
A fully charged battery will typically allow the power meter to be used
continuously for up to 3 hours with the backlight off and 2 hours with the
backlight on.
Battery Status
System
More
You can check the status of the battery by pressing
,
,
. The Battery Status disIpnplautys (Figure 2-1 )
More
Service
Battery
,
,
shows the charge condition of the battery represented on an analog meter
scale. Below the analog scale is a message indicating the estimated power
meter running time under battery operation with the present charge level.
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Power Meter Operation
Battery Operation (Option 001)
Running time can be increased by operating the power meter with the
display backlight turned off (see “Backlight”, on page 2-4 ).
Figure 2-1: Battery Status
When the power meter is running on battery power and there are less
than 10 minutes of run-time remaining, the message “Battery Low”
appears at the top of the screen. In addition, a pop up window appears
every minute with the message “Battery Power Low”.
Charging Times
The battery charges automatically when the power meter is connected to
an ac source. From an empty state the battery is fully charged in less than
2 hours. After approximately 50 minutes the battery has enough charge to
enable 1 hour of operation with the backlight on. After approximately 35
minutes the battery has enough charge to enable 1 hour of operation with
the backlight off.
Backlight
When you are operating the power meter under battery power you can
turn the display backlight off or on, or set it to timed mode. In timed mode
the display backlight turns off 10 minutes after the last key press - the
display can be turned on again by pressing any key.
Working with the backlight off reduces the drain on the battery and
increases the operating time available by approximately 50%. The display
can be comfortably read in ambient daylight with the backlight off.
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Power Meter Operation
Battery Operation (Option 001)
System
Inputs
More Service Battery
To access the backlight menu press
,
,
,
.
On Off Timed
, or
Use the softkeys on the menu to select either
,
.
Note
If the power meter is connected to an ac power source the
backlight menu is greyed out and the backlight is permanently on.
Battery Removal/Replacement
The battery unit is easily removed and replaced. Follow the instructions
given in Figure 2-2. To obtain a replacement battery unit order HP part
number E9287A (this can only be used in power meters with option 001
installed).
WARNING
This product uses a Nickel Metal Hydride battery.
Do not short circuit the battery terminals.
Do not subject the battery to excessive heat.
Do not dispose of by burning.
Refer to your local country regulatory requirements on the
disposal of Nickel Metal Hydride batteries.
Caution
Observe static precautions while removing and replacing the
battery module.
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Power Meter Operation
Battery Operation (Option 001)
Figure 2-2: Battery Removal/Replacement
2
1. Using a flat headed screwdriver, turn the two spring-loaded catches one
quarter turn anticlockwise.
1
2. Holding the catches, pull the battery assembly clear of its slot in the power
meter.
3. Support the closure assembly on a flat surface.
4. Pinch the release tab between finger and thumb while -
5. lightly pressing down on the battery module.
Replacing the battery is basically a reversal of the removal procedure.
5
4
Release Tab
Battery
Module
Closure
Assembly
3
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Power Meter Operation
Zeroing and Calibrating the Power Meter
Zeroing and Calibrating the Power Meter
This section describes how to zero and calibrate the power meter. You
should always zero the power meter prior to calibrating it.
Zeroing the Power Meter
Zeroing adjusts the power meter for a zero power reading with no power
applied to the power sensor. During zeroing, which takes approximately
10 seconds, the wait symbol is displayed.
To zero the power meter:
Zero
Cal
1. Press
.
Zero A Zero B
2. To zero channel A or channel B use or
respectively. Alternatively, to zero both channel A and channel B
Zero Both
sequentially, use
displayed.
. During zeroing the wait symbol is
When to Zero?
Zeroing of the power meter is recommended:
0
•
•
•
•
when a 5 C change in temperature occurs.
when you change the power sensor.
every 24 hours.
prior to measuring low level signals. For example, 10 dB above the
lowest specified power for your power sensor.
Zero/Cal Lockout
The Zero/Cal Lockout facilty provides a means of ensuring that a
measurement cannot be taken until the connected sensor has been zeroed
and calibrated. If the Zero/Cal Lockout facilty is enabled and a sensor is
connected which has not been zeroed and calibrated, then the display
window for the sensor will display the message “Please Zero + Cal ChA” or
“Please Zero + Cal ChB” depending on which channel the sensor is
connected to.
If you zero the sensor before calibrating it, the message changes to “Please
Cal ChA” or “Please Cal ChB” depending on which channel the sensor is
connected to.
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Power Meter Operation
Zeroing and Calibrating the Power Meter
If you calibrate the sensor before zeroing it, the message changes to
“Please Zero ChA” or “Please Zero ChB” depending on which channel the
sensor is connected to.
The Zero/Cal Lockout facility can be enabled/disabled through either the
System Inputs menu or the Zero Cal menu as follows:
System
More
More
Must Cal Off On
or .
Press
Press
,
,
,
Inputs
Zero
More
Must Cal Off On
or .
,
,
Cal
Calibrating the Power Meter
Calibration sets the gain of the power meter using a 50 MHz 1 mW
calibrator as a traceable power reference. The power meter’s POWER REF
output or a suitable external reference is used as the signal source for
calibration. An essential part of calibrating is setting the correct reference
calibration factor for the power sensor you are using. The HP 8480 series
power sensors require you to set the reference calibration factor. The
HP E-series power sensors set the reference calibration factor
automatically. During calibration the wait symbol is displayed. Offset,
relative and duty cycle settings are ignored during calibration.
Note
During calibration the power meter automatically switches the
power reference calibrator on (if it is not already on), then after
calibration it switches it to the state it was in prior to the
calibration.
Calibration Procedure Using HP E-Series Power Sensors
The following procedure describes how you calibrate the power meter with
an HP E-series power sensor. Since the power meter automatically
downloads the HP E-series power sensor’s calibration table there is no
requirement to enter the reference calibration factor. The power meter
identifies that an HP E-series power sensor is connected and will not
allow you to select certain softkeys. The text on these softkeys appears
grayed out.
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Power Meter Operation
Zeroing and Calibrating the Power Meter
Note
The following procedure details the calibration for channel A. To
calibrate channel B use the same procedure using the equivalent
channel B softkeys.
Zero
Cal
1. Press
.
2. Connect the power sensor to the POWER REF output.
Cal Cal A
to calibrate the power meter. During
3. Press
,
calibration the wait symbol is displayed. (The power meter
automatically turns on the POWER REF output.)
Example
To calibrate both channels of the power meter with HP E-series power
sensors connected to both channels.
Zero
Cal
•
•
•
•
Press
,
.
Cal
Connect the channel A power sensor to the POWER REF output.
Cal A
Press
then wait till the calibration is completed.
Remove the channel A power sensor from the POWER REF
output.
•
•
Connect the channel B power sensor to the POWER REF output.
Cal B
Press
then wait till the calibration is completed.
Calibration Procedure using HP 8480 Series Power Sensors
The following procedure describes how you calibrate the power meter with
the HP 8480 series power sensors.
Note
V8486A and W8486A sensors
For most 8480 series sensors the correct (A type or D type)
linearity correction table is automatically selected. However, for
the V8486A and W8486A sensors the automatic selection must be
overriden and the D type correction selected. Subsequent
connection of another A type sensor will result in a warning
message stating that “Linearity Override May be Required”.
To select the linearity type to be applied:
System
Tables A Linearity ATyp
DTyp
, or
Press
,
,
or
Inputs
B Linearity ATyp
DTyp
or
.
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Power Meter Operation
There are a variety of methods to connect the power sensors to the power
meter depending on the model of power sensor you are using. Refer to
Table 2-1 on page 2-11 for details on connecting different power sensor
Note
The following procedure details the calibration for channel A. To
calibrate channel B use the same procedure using the equivalent
channel B softkeys. To calibrate both channels sequentially follow
this procedure for channel A then repeat step “2” through to step
“5” using the equivalent channel B softkeys.
Zero
Cal
Cal
1. Press
,
.
2. Verify the reference calibration factor of your power sensor with
A Ref CF
that displayed under
. The value shown is obtained
from the sensor calibration table if one is selected, otherwise it is
the last value set or the default of 100%. If the value is not correct
A Ref CF
press
. The power meter displays the reference
calibration factor in a pop up window. Modify this reference
calibration factor (see below) as desired.
■
Use
currently positioned.
Use or to move to other digits.
or
to modify the digit on which the cursor is
■
%
3. To confirm your choice press
4. Connect the power sensor to the POWER REF output.
Cal A
.
5. Press
to calibrate the power meter. During calibration the
wait symbol is displayed. (The power meter automatically turns
on the POWER REF output.)
Example
To calibrate both channels of the power meter. The reference calibration
factors for the power sensors being 98.8% and 99.4% for channel A and
channel B respectively:
Zero
Cal
.
•
•
Press
Press
,
Cal
A Ref CF
. Use the
,
,
,
,
and
and
hardkeys to
hardkeys to
%
enter 98.8. Press
B Ref CF
. Use the
.
•
Press
enter 99.4. Press
Connect the channel A power sensor to the POWER REF output.
Cal A
%
.
•
•
Press
.
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Power Meter Operation
Zeroing and Calibrating the Power Meter
•
Remove the channel A power sensor from the POWER REF
output.
•
•
Connect the channel B power sensor to the POWER REF output.
Cal B
Press
.
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Power Meter Operation
Zeroing and Calibrating the Power Meter
Table 2-1: Connecting the HP 8480 Series Power Sensors During Calibration
Sensor
Connection Requirements
Model
HP 8481A
HP 8481H
HP 8482A
HP 8482H
These power sensors connect directly to the reference calibrator.
HP 8481D
HP 8484A
Prior to the power meter being calibrated an HP 11708A 30 dB
reference attenuator should be connected between the power
sensor and the reference calibrator. This attenuator must be
removed from the power sensor input prior to making
measurements.
HP 8483A
This power sensor requires a 75 Ω (f) to 50 Ω (m) N-Type adapter
(1250-0597) to connect to the reference calibrator. This adapter
must be removed from the power sensor input prior to making
measurements.
HP R8486A
HP Q8486A
HP V8486A
HP W8486A
HP R8486D
HP Q8486D
The waveguide power sensors have two connectors. The N-Type
connector is the one which is used to calibrate the power meter.
HP 8481B
HP 8482B
These power senors are configured with an attenuator. Prior to
the power meter being calibrated, this attenuator must be
removed. The attenuator must be reconnected prior to making
measurements.
HP 8485A
HP 8485D
This power sensor requires an APC 3.5 (f) to 50 Ω (m) N-Type
adapter (08485-60005) to connect to the reference calibrator.
Prior to the power meter being zeroed and calibrated an
HP 11708A 30 dB reference attenuator and an APC 3.5 (f) to
50 Ω (m) N-Type adapter (08485-60005) should be connected
between the power sensor and the reference calibrator. This
attenuator must be removed from the power sensor input prior to
making measurements.
HP 8487A
HP 8487D
This power sensor requires an APC 2.4 (f) to 50 Ω (m) N-Type
adapter (08487-60001) to connect to the power meter.
Prior to the power meter being zeroed and calibrated an
HP 11708A 30 dB reference attenuator and an APC 2.4 (f) to
50 Ω (m) N-Type adapter (08487-60001) should be connected
between the power sensor and the reference calibrator. This
attenuator must be removed from the power sensor input prior to
making measurements.
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Power Meter Operation
Zeroing and Calibrating the Power Meter
Zeroing and Calibrating Using TTL Inputs
You can use the TTL inputs on the rear panel Rmt I/O port to initiate zero
and calibration cycles on the power meter. The connector is an RJ-45
series shielded modular jack with the TTL input pins connected as shown
in Figure 2-3.
Figure 2-3: Rmt I/O Port TTL Inputs
Pin Number
Connection
1
2
3
4
5
6
8
none
Ground
Upper Window TTL Output
Lower Window TTL Output
TTL Input 1
1 2 3 4 5 6 7 8
TTL Input 2
Ground
Ground
The TTL inputs are active low and control the zero and calibration
functions as shown in Table 2-2
Table 2-2: TTL Inputs Control Logic
Input 1
Input 2
Operation
1
1
0
0
1
0
1
0
None
CAL A
ZERO BOTH
CAL B
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Power Meter Operation
Effective control of the zero and calibration cycles using the TTL inputs
depends on correct timing of the input signals as shown in Table 2-3 and
Table 2-4.
Table 2-3: TTL Input Timing Diagram 1
Timing of zero/cal inputs for conditions “01” and “10”.
Input
Operation
T1
T2
T3
T4
Time
T1
Description
Minimum width of input
Value
300 ms
T2
Time between input detection and start of zero/cal
cycle. This is determined by the number of
averages x sample rate, or if there is an existing
zero/cal operation in progress, the time for this
current operation to complete. Note that the
worst case is 1024 averages x 50 ms = 51.2 s. For
front panel operation (in free run mode) the time
is 1 x 50 ms.
Max: 50 ms (typical)
Min: 0 ms
T3
T4
Maximum width of input. Longer inputs may
cause a subsequent zero/cal operation some time
after the current one is complete.
4 s
Time for zero/cal operation to complete.
Zero Both: 10 s (each
8480 series sensor), 12 s
(each E series sensor)
Cal: 6 s (8480 series)
7 s (E series)
All timings based on 100 ms firmware polling.
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Power Meter Operation
Zeroing and Calibrating the Power Meter
Table 2-4: TTL Inputs Timing Diagram 2
Timing of zero/cal inputs for condition “00”.
Inputs
Operation
T5
T6
T7
T8
Time
T5
Description
Value
Maximum time between inputs going low.
Minimum overlap of low inputs.
100 ms
200 ms
4 s
T6
T7
Time between input detection and start of zero/cal
cycle. This is determined by the number of
averages x sample rate, or if there is an existing
zero/cal operation in progress, the time for this
current operation to complete. Note that the
worst case is 1024 averages x 50 ms = 51.2 s. For
front panel operation (in free run mode) the time
is 1 x 50 ms.
T8
Time for cal operation to complete.
Cal: 6 s (8480 series)
7 s (E series)
All timings based on 100 ms firmware polling.
If both TTL inputs are simultaneously low under any circumstances other than those
shown above, the operation is undefined.
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Power Meter Operation
Making Measurements with the HP E-Series Power Sensors
Making Measurements with the HP E-Series Power
Sensors
This section describes how to make continuous wave measurements using
the HP E-series power sensors. The HP E-series power sensors have their
sensor calibration tables stored in EEPROM. This allows the frequency
and calibration data to be downloaded to the power meter automatically.
To make measurements, perform the following steps:
1. Zero and calibrate the power meter.
2. Set the frequency for the signal you want to measure.
3. Take a reading.
Procedure
The following procedure details how to make a measurement on channel A
of the power meter. To make a measurement on channel B use the same
procedure using the equivalent channel B softkeys.
1. Ensure that no power is applied to the power sensor.
Zero
Cal
2. Press
.
Zero A
3. Press
. During zeroing, which takes approximately 10
seconds, the wait symbol is displayed.
4. Connect the power sensor to the POWER REF output.
Cal Cal A
to calibrate the power meter. During
5. Press
,
calibration the wait symbol is displayed. (The power meter
automatically turns on the POWER REF output.)
Frequency
6. Press
. The current setting of the frequency is displayed
Cal Fac
A Freq
under the
softkey.
A Freq
7. To change this setting press
. The power meter displays
the frequency in a pop up window. Modify this frequency (see
below) as desired.
■
Use
currently positioned.
Use or to move to other digits.
or
to modify the digit on which the cursor is
■
8. To confirm your choice press the appropriate frequency units.
9. Connect the power sensor to the signal to be measured.
10. You must set the display to the type of measurement you require.
This can either be a direct channel measurement, a ratio
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Power Meter Operation
Making Measurements with the HP E-Series Power Sensors
measurement of both channels, or a difference measurement
between both channels. Use the following key presses:
Meas
Input Select
Press
,
. Select the appropriate softkey for
Setup
More
A B A/B B/A
the measurement you require, either
,
,
,
, or
,
A-B B-A
then
, or
.
11. The measurement result is now displayed.
Example
To make a measurement on channel A using an HP E-series power sensor.
The frequency of the signal to be measured is 100 MHz.
•
•
•
•
•
•
Disconnect the power sensor from any source.
Zero
Press
Press
.
Cal
Zero A
.
Connect the power sensor to the POWER REF output.
Cal Cal A
Press
,
.
Frequency
A Freq
Press
,
. Use the
MHz
,
,
and
Cal Fac
hardkeys to enter 100. Press
.
•
•
Connect the power sensor to the signal to be measured.
The measurement result is now displayed.
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Power Meter Operation
Making Measurements with the HP 8480 Series Power Sensors
Making Measurements with the HP 8480 Series
Power Sensors
This section applies to all HP 8480 series power sensors. It does not apply
to the HP E-series power sensors.
For the HP 8480 series power sensors there are two methods of providing
correction data to the power meter:
A
inputting the individual calibration factor for a frequency prior to
making the measurement, or
B
using sensor calibration tables.
This section describes how to make measurements without using sensor
calibration tables, that is, inputting the individual calibration factor for a
frequency prior to making the measurement. This method is
advantageous if you are only measuring at one frequency, as entering all
the calibration data in this instance is not required.
To make measurements without sensor calibration tables perform the
following steps:
1. Zero and calibrate the power meter. Before carrying out the
calibration you must set the reference calibration factor of the
power sensor.
2. Set the calibration factor value for the frequency of the signal you
want to measure.
3. Take a reading.
Procedure
The following procedure details how to make a measurement on
channel A. To make a measurement on channel B use the same procedure
using the equivalent channel B softkeys.
1. Ensure that no power is applied to the power sensor.
Zero
2. Press
3. Press
.
Cal
Zero A
. During zeroing, which takes approximately 10
seconds, the wait symbol is displayed.
Cal
4. Press
.
5. Connect the power sensor to the POWER REF output.
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Power Meter Operation
Making Measurements with the HP 8480 Series Power Sensors
6. The current setting of the reference calibration factor is displayed
A Ref CF
A Ref CF
under the
softkey. To change this setting press
. The power meter displays the reference calibration
factor in a pop up window. Modify this reference calibration factor
(see below) as desired.
■
Use
currently positioned.
Use or to move to other digits.
or
to modify the digit on which the cursor is
■
%
7. To confirm your choice press
Cal Cal A
to calibrate the power meter. During
.
8. Press
,
calibration the wait symbol is displayed. (The power meter
automatically turns on the POWER REF output.)
Frequency
9. Press
. The current setting of the calibration factor is
softkey. To change this setting
. The power meter displays the calibration
Cal Fac
A Cal Fac
displayed under the
A Cal Fac
press
factor in a pop up window. Modify this calibration factor (see
below) as desired.
■
Use
currently positioned.
Use or to move to other digits.
or
to modify the digit on which the cursor is
■
%
10. To confirm your choice press
.
11. Connect the power sensor to the signal to be measured.
12. You must set the display to the type of measurement you require.
This can either be a direct channel measurement, a ratio
measurement of both channels, or a difference measurement
between both channels. Use the following key presses:
Meas
Input Select
Press
,
. Select the appropriate softkey for
Setup
More
A B A/B B/A
the measurement you require, either
,
,
,
, or
,
A-B B-A
then
13. The measurement result is now displayed.
Example
, or
.
To make a measurement on channel A with a power sensor which has a
reference calibration factor of 99.8% and a calibration factor of 97.8% at
the measurement frequency.
•
•
•
•
Disconnect the power sensor from any source.
Zero
Press
Press
Press
.
Cal
Zero A
.
Cal
.
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Power Meter Operation
Making Measurements with the HP 8480 Series Power Sensors
A Ref CF
•
Press
enter 99.8. Press
Connect the power sensor to the POWER REF output.
. Use the
.
,
,
and
hardkeys to
%
•
•
•
Cal A
Frequency
Cal Fac
Press
.
A Cal Fac
Press
,
. Use the
,
,
and
%
hardkeys to enter 97.8. Press
.
•
•
Connect the power sensor to the signal to be measured.
The measurement result is now displayed.
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Power Meter Operation
Making Measurements using Sensor Calibration Tables
Making Measurements using Sensor Calibration
Tables
This section applies to all HP 8480 series power sensors. It does not apply
to the HP E-series power sensors.
For the HP 8480 series power sensors there are two methods of providing
correction data to the power meter:
A
inputting the individual calibration factor for a frequency prior to
making the measurement, or
B
using sensor calibration tables.
This section describes how to use sensor calibration tables. Sensor
calibration tables are used to store the measurement calibration factors,
supplied with each power sensor, in the power meter. These calibration
factors are used to correct measurement results.
one or more power sensors. The power meter is capable of storing 20
To use sensor calibration tables you:
1. Select the table to work on a channel. Refer to “Selecting a Sensor
Calibration Table”, on page 2-19 for further information. If you
require to edit the table refer to “Editing Sensor Calibration
Tables”, on page 2-21 for further information.
factor used during the calibration is automatically set by the
power meter from the sensor calibration table.
3. Specify the frequency of the signal you want to measure. The
calibration factor is automatically set by the power meter from the
sensor calibration table. Refer to “Making the Measurement”, on
page 2-20 for further information.
4. Make the measurement.
Selecting a Sensor Calibration Table
System
You can select a sensor calibration table for use by pressing
,
Inputs
Tables Sensor Cal Tables A Table Off On
,
,
or
B Table Off On
. The “State” field indicates if any sensor calibration
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Power Meter Operation
Making Measurements using Sensor Calibration Tables
tables are currently selected. The “Sensor Tbls” screen is displayed as
shown in Figure 2-4.
Figure 2-4: “Sensor Tbls” Screen
Making the Measurement
To make the power measurement, you zero and calibrate the power meter,
then set it for the frequency of the signal you want to measure. The power
calibration table.
Note
The following procedure details the calibration for channel A. To
calibrate channel B use the same procedure using the equivalent
channel B softkeys. To calibrate both channels, zero the power
Zero Both
meter using
in step “2”, then follow this procedure for
channel A then repeat step “3” through to step “9” using the
equivalent channel B softkeys.
Zero
1. Press
2. Press
.
Cal
Zero A
. During zeroing, which takes approximately 10
seconds, the wait symbol is displayed.
Cal
3. Press
obtained from the sensor calibration table and displayed under the
A Ref CF
. The setting of the reference calibration factor is
softkey.
4. Connect the power sensor to the POWER REF output.
Cal A
5. Press
to calibrate the power meter. During calibration the
wait symbol is displayed. (The power meter automatically turns
on the POWER REF output.)
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Power Meter Operation
Making Measurements using Sensor Calibration Tables
Frequency
Cal Fac
6. Press
. The current setting of the frequency is displayed
A Freq
under the
softkey.
A Freq
7. To change this setting press
. The power meter displays
the frequency in a pop up window. Modify this frequency (see
below) as desired.
■
Use
currently positioned.
Use or to move to other digits.
or
to modify the digit on which the cursor is
■
8. To confirm your choice press the appropriate frequency unit.
9. Connect the power sensor to the signal to be measured.
10. You must set the display to the type of measurement you require.
This can either be a direct channel measurement, a ratio
measurement of both channels, or a difference measurement
between both channels. Use the following key presses:
Meas
Input Select
Press
,
. Select the appropriate softkey for
Setup
More
A B A/B B/A
the measurement you require, either
,
,
,
, or
,
A-B B-A
then
, or
.
11. The measurement result is now displayed.
Note
If the measurement frequency does not correspond directly to a
frequency in the sensor calibration table, the power meter
calculates the calibration factor using linear interpolation.
If you enter a frequency outside the frequency range defined in the
sensor calibration table, the power meter uses the highest or
lowest frequency point in the sensor calibration table to set the
calibration factor.
The value of the calibration factors being used by the power meter
A Cal Fac
to make a measurement is displayed under the
or
B Cal Fac
softkeys.
You can edit sensor calibration tables using the “Edit Cal” menu as shown
in Figure 2-5.
To view the sensor calibration tables currently stored in the power meter,
System
Tables Sensor Cal Tables
press
,
,
. The “Sensr Tbls” screen is
displayIendputass shown in Figure 2-4.
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Power Meter Operation
Making Measurements using Sensor Calibration Tables
Figure 2-5: “Edit Cal” Screen
The power meter is shipped with a set of predefined sensor calibration
tables. The data in these tables is based on statistical averages for a range
of Hewlett-Packard power sensors.
These power sensors are:
1
•
•
•
•
•
•
•
•
•
•
DEFAULT
HP 8481A
2
HP 8482A
HP 8483A
HP 8481D
HP 8485A
R8486A
Q8486A
R8486D
HP 8487A
1. DEFAULT is a sensor calibration table in which the reference calibration
factor and calibration factors are 100%. This sensor calibration table can be
used during the performance testing of the power meter.
2. The HP 8482B and HP 8482H power sensors use the same data as the
HP 8482A.
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Power Meter Operation
Making Measurements using Sensor Calibration Tables
There are also ten sensor calibration tables named CUSTOM_0 through
CUSTOM_9 which do not contain any data when the power meter is
shipped from the factory.
You cannot delete any of the 20 sensor calibration tables. Each sensor
calibration table can contain a maximum of 80 frequency points each. If
To edit a table:
1. Select one using the
displayed tables. When the table you want to edit is highlighted
Edit Table
and
hardkeys to scroll through the
press
. The “Edit Cal” screen is displayed as shown
in Figure 2-5 on page 2-21. In this screen you can modify, add and
remove frequency and calibration factors and also edit the table
name. Use the
,
,
and
hardkeys to move
between the table name and its frequency and calibration factors.
A frequency in the range of 0.001 MHz to 999.999 GHz can be
entered.
A calibration factor in the range of 1% to 150% can be entered.
The following rules apply to naming sensor calibration tables:
■
The name must consist of no more than 12 characters.
■
All characters must be upper or lower case alphabetic
characters, or numeric (0-9), or an underscore (_).
■
■
No other characters are allowed.
No spaces are allowed in the name.
Change
2. To edit the parameter you currently have selected press
.
The power meter displays the data in a pop up window. Modify
this data (see below) as desired.
■
Use
is currently positioned.
Use or to move to other characters.
or
to modify the character on which the cursor
■
3. To confirm your choice press the appropriate softkey.
Insert
4. To add a new sensor calibration table entry press
. You are
prompted for the frequency and calibration factor. The entry is
sorted by frequency.
5. To remove a sensor calibration table entry use the
,
,
Delete
and
hardkeys to select the entry, press
. If you
delete the frequency the equivalent calibration factor is also
removed and vice versa.
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Power Meter Operation
Making Measurements using Sensor Calibration Tables
Note
Note
You can only edit the table name you cannot delete it.
6. When you have completed editing the sensor calibration table
Done
press
to return to the “Sensor Tbles” screen.
Ensure that the frequency points you use cover the frequency
range of the signals you want to measure. If you measure a signal
with a frequency outside the frequency range defined in the sensor
calibration table, the power meter uses the highest or lowest
frequency point in the sensor calibration table to calculate the
calibration factor.
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Power Meter Operation
Making Measurements using Sensor Calibration Tables
The following lists detail the contents of the predefined sensor calibration
tables.
DEFAULT
RCF 100
HP 8482A
RCF 98
0.1 MHz 100
110 GHz 100
HP 8481A
0.1 MHz 98
0.3 MHz 99.5
1 MHz 99.3
3 MHz 98.5
10 MHz 98.5
30 MHz 98.1
100 MHz 97.6
300 MHz 97.5
1 GHz 97
RCF 100
50 MHz 100
100 MHz 99.8
2 GHz 99
3 GHz 98.6
4 GHz 98
5 GHz 97.7
6 GHz 97.4
7 GHz 97.1
8 GHz 96.6
9 GHz 96.2
10 GHz 95.4
11 GHz 94.9
12.4 GHz 94.3
13 GHz 94.3
14 GHz 93.2
15 GHz 93
16 GHz 93
17 GHz 92.7
18 GHz 91.8
2 GHz 95
3 GHz 93
4.2 GHz 91
HP 8483A
RCF 94.6
0.1 MHz 94
0.3 MHz 97.9
1 MHz 98.4
3 MHz 98.4
10 MHz 99.3
30 MHz 98.7
100 MHz 97.8
300 MHz 97.5
1 GHz 97.2
2 GHz 96.4
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Power Meter Operation
Making Measurements using Sensor Calibration Tables
HP 8481D
HP 8485A
RCF 99
50 MHz 99
500 MHz 99.5
1 GHz 99.4
2 GHz 99.5
3 GHz 98.6
4 GHz 98.6
5 GHz 98.5
6 GHz 98.5
7 GHz 98.6
8 GHz 98.7
9 GHz 99.5
10 GHz 98.6
11 GHz 98.7
12 GHz 99
RCF 100
50 MHz 100
2 GHz 99.5
4 GHz 98.9
6 GHz 98.5
8 GHz 98.3
10 GHz 98.1
11 GHz 97.8
12 GHz 97.6
12.4 GHz 97.6
14 GHz 97.4
16 GHz 97
17 GHz 96.7
18 GHz 96.6
19 GHz 96
12.4 GHz 99.1
13 GHz 98.9
14 GHz 99.4
15 GHz 98.9
16 GHz 99.1
17 GHz 98.4
18 GHz 100.1
R8486A
20 GHz 96.1
21 GHz 96.2
22 GHz 95.3
23 GHz 94.9
24 GHz 94.3
25 GHz 92.4
26 GHz 92.2
26.5 GHz 92.1
R8486D
RCF 100
50 MHz 100
26.5 GHz 94.9
27 GHz 94.9
28 GHz 95.4
29 GHz 94.3
30 GHz 94.1
31 GHz 93.5
32 GHz 93.7
33 GHz 93.7
34 GHz 94.9
34.5 GHz 94.5
35 GHz 94.4
36 GHz 93.7
37 GHz 94.9
38 GHz 93.5
39 GHz 93.9
40 GHz 92.3
RCF 97.6
50 MHz 97.6
26.5 GHz 97.1
27 GHz 95.3
28 GHz 94.2
29 GHz 94.5
30 GHz 96.6
31 GHz 97.6
32 GHz 98
33 GHz 98.9
34 GHz 99.5
34.5 GHz 99
35 GHz 97.6
36 GHz 99
37 GHz 98.2
38 GHz 97.4
39 GHz 97.6
40 GHz 100
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Power Meter Operation
Making Measurements using Sensor Calibration Tables
HP 8487A
RCF 100
HP 8487A continued
37 GHz 92.4
38 GHz 90.9
39 GHz 91.3
40 GHz 91.4
41 GHz 90.6
42 GHz 89.9
43 GHz 89.1
44 GHz 88.1
45 GHz 86.9
46 GHz 85.8
47 GHz 85.4
48 GHz 83.2
49 GHz 81.6
50 GHz 80.2
Q8486A
50 MHz 100
100 MHz 99.9
500 MHz 98.6
1 GHz 99.8
2 GHz 99.5
3 GHz 98.9
4 GHz 98.8
5 GHz 98.6
6 GHz 98.5
7 GHz 98.4
8 GHz 98.3
9 GHz 98.3
10 GHz 98.3
11 GHz 98.1
12 GHz 97.9
13 GHz 98
14 GHz 98.2
15 GHz 97.7
16 GHz 96.8
17 GHz 97
18 GHz 96.3
19 GHz 95.9
RCF 100
50 MHz 100
33.5 GHz 91.3
34.5 GHz 92
35 GHz 91.7
36 GHz 91.5
37 GHz 92.1
38 GHz 91.7
20 GHz 95.2
21 GHz 95.6
22 GHz 95.5
23 GHz 95.4
24 GHz 95
25 GHz 95.4
26 GHz 95.2
27 GHz 95.1
28 GHz 95
29 GHz 94.4
30 GHz 94
31 GHz 93.7
32 GHz 93.8
33 GHz 93
39 GHz 91
40 GHz 90.7
41 GHz 90.3
42 GHz 89.5
43 GHz 88.5
44 GHz 88.7
45 GHz 88.2
46 GHz 87
47 GHz 86.4
48 GHz 85.3
49 GHz 84.7
50 GHz 82.9
34 GHz 93.2
34.5 GHz 93.5
35 GHz 93.1
36 GHz 92
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Power Meter Operation
Making Measurements using Frequency Dependent Offset Tables
Making Measurements using Frequency Dependent
Offset Tables
This section describes how to use frequency dependent offset tables.
Frequency dependent offset tables provide you with a quick and
convenient method of compensating for your external test setup over a
range of frequencies. Note that when selected, frequency dependent offset
correction is IN ADDITION to any correction applied for sensor frequency
response.
To use frequency dependent offset tables you:
1. Select the table to work on a channel. Refer to “Selecting a
Frequency Dependent Offset Table”, on page 2-27 for further
information. If you require to edit the table refer to “Editing
Frequency Dependent Offset Tables”, on page 2-29 for further
information.
power meter from the sensor calibration table (if selected).
3. Specify the frequency of the signal you want to measure. The
calibration factor/offset is automatically set by the power meter
from the sensor calibration table (if selected) and the frequency
dependent offset table. Refer to “Making the Measurement”, on
page 2-28 for further information.
4. Make the measurement.
You can select a frequency dependent offset table for use by pressing
System
Tables Freq Dep Offset A Table Off On
,
,
,
or
Inputs
B Table Off On
. The “State” field indicates if any frequency
dependent offset tables are currently selected. The “Offset Tbls” screen is
displayed as shown in Figure 2-6.
2-30
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Power Meter Operation
Making Measurements using Frequency Dependent Offset Tables
Figure 2-6: “Offset Tbls” Screen
Making the Measurement
To make the power measurement, you zero and calibrate the power meter,
then set it for the frequency of the signal you want to measure. The power
meter automatically selects the calibration factor from the sensor
offset table.
Note
The following procedure details the calibration for channel A. To
calibrate channel B use the same procedure using the equivalent
channel B softkeys. To calibrate both channels, zero the power
Zero Both
meter using
in step “2”, then follow this procedure for
channel A then repeat step “3”through to step “9”using the
equivalent channel B softkeys.
Zero
1. Press
2. Press
.
Cal
Zero A
. During zeroing, which takes approximately 10
seconds, the wait symbol is displayed.
Cal
3. Press
obtained from the sensor calibration table (if selected) and
A Ref CF
. The setting of the reference calibration factor is
displayed under the
4. Connect the power sensor to the POWER REF output.
Cal A
softkey.
5. Press
to calibrate the power meter. During calibration the
wait symbol is displayed. (The power meter automatically turns
on the POWER REF output.)
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Power Meter Operation
Making Measurements using Frequency Dependent Offset Tables
Frequency
6. Press
. The current setting of the frequency is displayed
Cal Fac
A Freq
under the
softkey.
A Freq
7. To change this setting press
. The power meter displays
the frequency in a pop up window. Modify this frequency (see
below) as desired.
■
Use
currently positioned.
Use or to move to other digits.
or
to modify the digit on which the cursor is
■
8. To confirm your choice press the appropriate frequency unit.
9. Connect the power sensor to the signal to be measured.
10. You must set the display to the type of measurement you require.
This can either be a direct channel measurement, a ratio
measurement of both channels, or a difference measurement
between both channels. Use the following key presses:
Meas
Input Select
Press
,
. Select the appropriate softkey for
Setup
More
A B A/B B/A
the measurement you require, either
,
,
,
, or
,
A-B B-A
then
, or
.
11. The measurement result is now displayed.
Note
If the measurement frequency does not correspond directly to a
frequency in the sensor calibration table (if selected) and the
frequency dependent offset table being used, the power meter
calculates the calibration factor and offset using linear
interpolation.
If you enter a frequency outside the frequency range defined in the
sensor calibration table or the frequency dependent offset table,
the power meter uses the highest or lowest frequency point in the
appropriate table to set the calibration factor and offset.
The value of the calibration factors being used by the power meter
A Cal Fac
to make a measurement is displayed under the
or
B Cal Fac
softkeys.
Editing Frequency Dependent Offset Tables
You can edit frequency dependent offset tables using the “Edit” menu as
shown in Figure 2-7.
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Power Meter Operation
To view the frequency dependent offset tables currently stored in the
System
Inputs
Tables Freq Dep Offset
. The “Offset
power meter, press
,
,
Tbls” screen is displayed as shown in Figure 2-6.
Figure 2-7: “Edit” Screen
There are ten frequency dependent offset tables named CUSTOM_A
through CUSTOM_J which do not contain any data when the power meter
is shiped from the factory.
You cannot delete any of the 10 existing frequency dependent offset tables
or create any additional tables. However, you can edit the 10 existing
tables. Each frequency dependent offset table can contain a maximum of
80 frequency points.
To edit a table:
1. Select one using the
displayed tables. When the table you want to edit is highlighted
Edit Table
and
hardkeys to scroll through the
press
. The “Edit Offset” screen is displayed as
shown in Figure 2-7 on page 2-29. In this screen you can modify,
add and remove frequencies and offset and also edit the table
name. Use the
,
,
and
hardkeys to move
between the table name and its frequencies and offsets.
A frequency in the range of 0.001 MHz to 999.999 GHz can be
entered.
An offset in the range of 1% to 150% can be entered.
The following rules apply to naming frequency dependent offset
tables:
■
The name must consist of no more than 12 characters.
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Power Meter Operation
Making Measurements using Frequency Dependent Offset Tables
■
All characters must be upper or lower case alphabetic
characters, or numeric (0-9), or an underscore (_).
■
■
No other characters are allowed.
No spaces are allowed in the name.
Change
2. To edit the parameter you currently have selected press
.
The power meter displays the data in a pop up window. Modify
this data (see below) as desired.
■
Use
is currently positioned.
Use or to move to other characters.
or
to modify the character on which the cursor
■
3. To confirm your choice press the appropriate softkey.
4. To adda new frequency dependent offset table entry, press
Insert
. You are prompted for the frequency and offset. The entry
is sorted by frequency.
5. To remove a frequency dependent offset table entry, use the
,
Delete
,
and
hardkeys to select the entry, press
. If
you delete the frequency the equivalent offset is also removed and
vice versa.
Note
Note
You can only edit the table name you cannot delete it.
6. When you have completed editing the frequency dependent offset
Done
table, press
to return to the “Offset Tbls” screen.
Ensure that the frequency points you use cover the frequency
range of the signals you want to measure. If you measure a signal
with a frequency outside the frequency range defined in the
frequency dependent offset table, the power meter uses the
highest or lowest frequency point in the frequency dependent
offset table to calculate the offset.
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Power Meter Operation
Setting the Units of Measurement
Setting the Units of Measurement
The “dBm/W” menu is used to select the measurement units on the
currently selected window. These can either be logarithmic (dBm or dB) or
Preset
linear (Watt or %) units.
sets the measurement units to dBm
(logarithmic units). Table L2o-c5alshows which units are applicable to the
individual measurement modes.
dBm/W
dBm W dB
or
Press
%
, then select the unit of measurement from
,
,
. Softkeys which cannot be selected in your particular mode of operation
appear with their text grayed out.
Note
When the unit of measurement is set to Watt, it is possible that
negative power measurements may be displayed when measuring
low power levels.
Table 2-5: Measurement Units
1
Relative Mode Off
Relative Mode On
Measurement
Mode
Linear
Log
dBm
Linear Log
Single Channel
Ratio
Watt
%
%
dB
dB
dB
dB
%
%
Difference
Watt
dBm
Rel
Rel Off On
is “On”), the
1. When relative mode is on (that is,
,
Offset
measurement is compared to a reference value.
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Power Meter Operation
Selecting Units of Measurement from the Softkeys
Selecting Units of Measurement from the Softkeys
In various softkey menu structures you are required to enter the units of
measurement for power. In some cases, due to the wide power range
available, the following menu is displayed:
mW
µW
nW
Cancel
W
Increment
Multiplier
More
Decrement
Multiplier
Cancel
Note
Some softkeys may be grayed out so that an invalid value cannot
be entered.
Increment Multiplier Decrement Multiplier
or
increases or decreases the multiplier shown in front of . Pressing
after the correct multiplier has been selected confirms the entry.
Pressing
W
W
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Power Meter Operation
Making Relative Measurements
Making Relative Measurements
Relative mode allows you to compare any measurement result to a
reference value. The relative reading can be displayed in either dB or % by
dBm/W
dB %
and selecting either or . When the measurement
pressing
result is displayed in % a prefix multiplier may be shown.
Relative mode is window dependent and when enabled displays “Rel” in
the window to which it’s applied.
Procedure
To set a reference value on the currently selected window:
Rel
1. Press
2. Press
.
Offset
Rel
to use the current reading as the reference value. This
allows you to compare any measurement result in dB or
percentage (%).
Rel Off On
Rel
is pressed.
3.
is automatically set to “On” when
Successive measurements are now displayed relative to the reference
value. The relative mode can be disabled and re-enabled simply by
Rel Off On
pressing
.
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Power Meter Operation
Setting the Resolution
Setting the Resolution
The resolution of each of the power meter’s windows can be set to four
different levels (1, 2, 3 or 4).
These four levels represent:
•
1, 0.1, 0.01, 0.001 dB respectively if the measurement suffix is
dBm or dB.
•
1, 2, 3 or 4 significant digits respectively if the measurement suffix
is W or %.
The default value is 0.01 dB (3 digits).
To set the resolution on the currently selected window:
Meas
1. Press
on the
. The current setting of the resolution is highlighted
Setup
Resolution 1 2 3 4
softkey.
Resolution 1 2 3 4
2. To change this setting press
until the
required resolution setting is highlighted.
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Power Meter Operation
Setting Offsets
Setting Offsets
Setting Channel Offsets
The power meter can be configured to compensate for a signal loss or gain
in your test setup (for example, to compensate for the loss of a 10 dB
attenuator). This gain or loss, referred to as a channel offset, is added to
the measured power before the result is displayed.
Offsets are entered in dB. The allowable range of values is -100 dB to
+100 dB. A positive value compensates for a loss, and a negative value
compensates for a gain.
If either a channel or a display offset is set then “Ofs” is displayed.
To enter a channel offset which compensates for a loss or gain:
System
1. Press
2. Press
.
Inputs
A Input Settings B Input Settings
or
depending on
the channel which you want to apply offsets to.
Offset
3. Press
. The power meter displays the offset value in a pop
up window. Modify this offset (see below) as desired.
■
Use
currently positioned.
Use or to move to other digits.
dB
or
to modify the digit on which the cursor is
■
4. To confirm your choice press
.
Offset Off On
5.
is automatically set to “On” when a value is
Offset
entered using
.
Channel offsets can be disabled and re-enabled simply by pressing
Offset Off On
.
Setting Display Offsets
The display offset function provides a method for entering display offset
values.
If either a channel or a display offset is set then “Ofs” is displayed.
To enter a display offset on the currently selected window:
Rel
Offset
Offset
1. Press
,
.
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Power Meter Operation
Setting Offsets
2. The power meter displays the offset value in a pop up window.
Modify this offset (see below) as desired.
■
Use
currently positioned.
Use or to move to other digits.
dB
or
to modify the digit on which the cursor is
■
3. To confirm your choice press
.
Offset Off On
4.
is automatically set to “On” when a value is
Offset
entered using
.
Display offsets can be disabled and re-enabled simply by pressing
Offset Off On
.
The display offset is a function of the window. That is, if you have selected
a two window display each can have its own offset.
Figure 2-8 and Figure 2-9 display the effects of the channel and display
offsets on the power meter’s displayed reading.
Figure 2-8: Effect of Offsets on a Channel Measurement
Ch Input with
Ch Offset
Ch Input with Ch Offset and
Display Offset
READING
ON POWER
METER
Ch Input
Display ††
Ch
Offset
†
Offset
DISPLAY
Figure 2-9: Effect of Offsets on a Maths Measurement
ChA Input
ChB Input
ChA Input with Ch Offset
ChA
†
†
Offset
Result with
Display Offset Applied
READING
ON POWER
METER
Result
Display ††
Math, A, B, A-B,
B-A, A/B, B/A,
Offset
DISPLAY
ChB
Offset
ChB Input with Ch Offset
System
Inputs
A Input Settings
or
† Channel Offset entered using
,
B Input Settings Offset
,
.
Rel
Offset
Offset
.
†† Display Offset entered using
,
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Power Meter Operation
Setting Averaging
Setting Averaging
The power meter uses a digital filter to average power readings. The
number of readings averaged can range from 1 to 1024. This filter is used
to reduce noise, obtain the desired resolution and to reduce the jitter in
the measurement results. Increasing the value of the filter length reduces
measurement noise. However, the time to take the measurement is
increased. You can select the filter length or you can set the power meter
When the auto filter mode is enabled, the power meter automatically sets
the number of readings averaged together to satisfy the filtering
requirements for most power measurements. The number of readings
averaged together depends on the resolution and the power level currently
being measured. Figure 2-9 lists the number of readings averaged for each
range and resolution when the power meter is in auto filter mode and is
set to normal speed mode (refer to the HP E4418B/E4419B Programming
Guide for details of the readings averaged in the other speed modes).
Resolution is a window function and not a channel function. In the case
where a channel is set up in both the upper and lower window and the
resolution settings are different, the highest resolution setting is taken to
calculate the averaging number. For example, if the upper window has a
resolution setting of 2 and is measuring channel A - channel B and the
lower window has a resolution of 4 and is measuring channel A. In this
instance channel A averaging is calculated with a resolution of 4 and
channel B with a resolution of 2.
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Power Meter Operation
Setting Averaging
Figure 2-10: Averaged Readings
Resolution Setting
Minimum Sensor Power
1
1
2
3
4
8
128
128
10 dB
10 dB
10 dB
10 dB
1
1
1
1
1
1
1
1
16
2
256
32
16
8
1
1
Maximum Sensor Power
These four resolution levels represent:
•
1, 0.1, 0.01, 0.001 dB respectively if the measurement suffix is
dBm or dB.
•
1, 2, 3 or 4 significant digits respectively if the measurement suffix
is W or %.
Note
The following procedure details how to set the averaging for
channel A. To set the averaging on channel B use the same
B Input Settings
procedure using the
softkey.
To set averaging:
System
More
A Input Settings
1. Press
,
,
. Press the
Inputs
ChA Filter
softkey to access the filter menu.
Length
. A pop up window
2. The current setting of averaging is displayed under the
Length
softkey. To change this setting press
appears. Use the
length.
,
,
or
keys to set your filter
Enter
3. To confirm your choice press
.
The filter can be disabled and re-enabled simply by pressing
Filter Off On
.
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Power Meter Operation
Setting Averaging
Step Detection
To reduce the filter settling time after a significant step in the measured
power the filter can be set to re-initialise upon detection of a step
increase/decrease in the measured power. Step detection can be set in both
manual and automatic filter modes.
To set step detection for channel A:
System
Inputs
More
A Input Settings
1. Press
,
,
.
ChA Filter
2. Press the
softkey to access the filter menu.
Step Det Off On
3. Use the
softkey to enable /disable step
detection.
B Input Settings
For channel B use the steps above except use
and
ChB Filter
.
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Power Meter Operation
Measuring Pulsed Signals
Measuring Pulsed Signals
The power meter can be used to measure the power of a pulsed signal. The
measurement result is a mathematical representation of the pulse power
rather than an actual measurement (assumes constant peak power). The
power meter measures the average power of the pulsed input signal and
then divides the measurement result by the duty cycle value to obtain the
pulse power reading. The allowable range of values is 0.001 % to 100 %.
The default value is 1.000%.
Note
Pulse measurements are not recommended using HP E4412A and
E4413A power sensors.
An example of a pulsed signal is shown in Figure 2-10.
Figure 2-11: Pulsed Signal
Power
B
Duty Cycle = A
B
Time
A
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Power Meter Operation
Measuring Pulsed Signals
To set the duty cycle:
System
More
A Input Settings
1. Press
,
,
. The current setting
of the dIunptuytscycle is displayed under the
softkey.
Duty Cycle
Duty Cycle
2. To change this setting press
. The power meter
displays the duty cycle in a pop up window. Modify this value (see
below) until the desired duty cycle is displayed.
■
Use
currently positioned.
Use or to move to other digits.
or
to modify the digit on which the cursor is
■
%
3. To confirm your choice press
.
Duty Cycle Off On
4.
is automatically set to “On” when a value
Duty Cycle
is entered using
.
Duty cycle can be disabled and re-enabled simply by pressing
Duty Cycle Off On
.
Note
Pulse power averages out any aberrations in the pulse such as
overshooting or ringing. For this reason it is called pulse power
and not peak power or peak pulse power.
In order to ensure accurate pulse power readings, the input signal
must be pulsed with a rectangular pulse. Other pulse shapes (such
as triangle, chirp or Gaussian) will cause erroneous results.
The pulse power on/off ratio must be much greater than the duty
cycle ratio.
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Power Meter Operation
Setting Measurement Limits
Setting Measurement Limits
You can configure the power meter to detect when a measurement is
outwith a predefined upper and/or lower limit value.
There are two types of measurement limits you can set:
•
Channel Limits - are applied to the specified input channel and
are for power measurements only.
•
Window Limits - are windows based (upper and lower) and can be
applied to power, ratio or difference measurements. In addition,
the window based limits can be set to output a TTL logic level at
the rear panel Rmt I/O port when the predefined limits are
exceeded.
Note
Only one set of limits can be on at a time, that is, Channel OR
Window.
Setting Channel Limits
The power meter can be configured to verify the power being measured
against an upper and/or lower limit value. The range of values that can be
set for upper and lower limits is -150 dBm to 230 dBm. The default upper
limit is 90.00 dBm and the default lower limit is -90.00 dBm.
To set the limits:
System
A Input Settings Limits
. The current
1. Press
,
,
setting Ionfputtshe maximum and minimum limits are displayed under
Max
Min
softkeys respectively.
the
and
2. To change either of these settings press the appropriate softkey.
The power meter displays the current value in a pop up window.
Modify this value (see below) until the desired value is displayed.
■
Use
currently positioned.
Use or to move to other digits.
or
to modify the digit on which the cursor is
■
3. To confirm your choice press the appropriate measurement units.
Limits can be disabled and re-enabled simply by pressing
Limits Off On
.
A typical application for this feature is shown in Figure 2-11.
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Power Meter Operation
Setting Measurement Limits
Figure 2-12: Limits Checking Application
Power Meter
Swept Source
Device
Under Test
OUT
IN
OUT
CHANNEL A
INPUT
Figure 2-13: Limits Checking Results
Amplitude
Fail
o
+10 dBm
o
o
o
o
o
+4 dBm
o
Fail
Frequency
In this application a swept frequency signal is applied to the input of the
Device Under Test. The power meter measures the output power. The
limits have been set at +4 dBm and +10 dBm. A fail occurs each time the
output power is outside these limits as shown in Figure 2-12.
Setting Window Limits
The power meter can be configured to verify the current measurement in
either window against predefined upper and/or lower limit values. The
range of values that can be set for the upper and lower limits and the
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Power Meter Operation
Setting Measurement Limits
default values depends on the measurement units in the currently
selected window - see Table 2-6.
Table 2-6: Range of Values for Window Limits
Window
Units
Default
Max
Max
Min
Min
dB
dBm
%
+200 dB
+230 dBm
999.9 X%
-180 dB
-150 dBm
100.0 a%
1.000 aW
60 dB
-120 dB
-90 dBm
100.0 p%
1.000 pW
90 dBm
100.0 M%
1.000 MW
W
100.000 XW
The window based limits can also be set to output a TTL logic level at the
switch the rear panel TTL outputs on or off; set the TTL output level to
active high or low; and determine whether the TTL output represents an
over limit condition, under limit condition or both.
The TTL connector is an RJ-45 series shielded modular jack assembly
with the TTL output pins connected as shown in Figure 2-13.
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Power Meter Operation
Setting Measurement Limits
Figure 2-14: Remote I/O TTL Outputs
Pin Number
Connection
1
2
3
4
5
6
7
8
none
Ground
Upper Window TTL Output
Lower Window TTL Output
TTL Input 1
1 2 3 4 5 6 7 8
TTL Input 2
Ground
Ground
To set the limits:
Meas
Limits
. The current setting of the maximum and
1. Press
,
Setup
Max
Min
softkeys
minimum limits are displayed under the
respectively.
and
2. To change either of these settings press the appropriate softkey.
The power meter displays the current value in a pop up window.
Modify this value (see below) until the desired value is displayed.
■
Use
currently positioned.
Use or to move to other digits.
or
to modify the digit on which the cursor is
■
3. To confirm your choice press the appropriate measurement units.
Limits can be disabled and re-enabled simply by pressing
Limits Off On
.
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Power Meter Operation
Setting Measurement Limits
To set the TTL Output:
Meas
Limits TTL Output
1. Press
,
,
. The current settings for the
TTL Output Limits
Setup
TTL Output are displayed under the
,
and
Fail O/P
softkeys.
2. To select whether the TTL output reflects an overlimit condition,
Limits
under limit condition or both, press
arrow keys to make a selection between
EITHER
. Use any of the four
OVER UNDER
,
, and
on the pop up menu that appears.
3. To select whether a high or low level TTL output represents a
Fail O/P High
limits failure, use the
Low
softkey to toggle between
and
TTL Outputs can be disabled and re-enabled simply by pressing
TTL Output Off On
.
Checking for Limit Failures
Limit failures are displayed in the appropriate field in the measurement
window on the power meter’s display as shown in Figure 2-14.
Note
The same limit fail field is used by both channel and window
limits.
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Power Meter Operation
Setting Measurement Limits
Figure 2-15: Pass/Fail Limit Indicators
This
measurement has
passed which is
indicated by the
limit field being
empty.
This
measurement has
failed as the result
is less than the
minimum limit
level set of
-60 dBm. This is
indicated with the
text “Undr Lmt”.
This
measurement has
failed as the
result is more
than the
maximum limit
level set of
-65 dBm. This is
indicated with the
text “Over Lmt”.
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Power Meter Operation
Channel Measurements
Channel Measurements
Single channel measurements can be made on the currently selected
Meas
Setup
Input Select
A B
and selecting or
window by pressing
,
.
Watts. The filter, range (where applicable), offset, duty cycle, calibration
factor and limits can be set for the selected channel.
Single channel measurements can be displayed relative to a stored
reference. In relative mode readings are displayed in either dB or %. Refer
to “Making Relative Measurements”, on page 2-37 for further information.
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Power Meter Operation
Making Difference Measurements
Making Difference Measurements
Dual channel difference measurements can be made on the currently
Meas
More
Input Select
selected window by pressing
,
,
and selecting
Setup
A-B B-A
or
. The power meter always carries out “Maths” calculations in
Watts. The power meter displays the numerical difference of the power
values of both channels in dBm or Watts. The power value for each
channel includes offsets, calibration factors and duty cycle in addition to
measured power. The filter, range (where applicable), offset, duty cycle
and calibration factor are set individually for each channel.
Logarithmic units (dBm) can be used in A-B difference measurements
where the channel A power level is less than the channel B power level.
Likewise, logarithmic units can be used in B-A difference measurements
However, the negative sign is ignored and a log error is displayed on the
status line and in the error queue.
Difference measurements can be displayed relative to a stored reference.
In relative mode readings are displayed in either dB or %. Refer to
“Making Relative Measurements”, on page 2-37 for further information.
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Power Meter Operation
Making Ratio Measurements
Making Ratio Measurements
Dual channel ratio measurements can be made on the currently selected
Meas
Setup
Input Select
A/B B/A
or
window by pressing
,
and selecting
.
The power meter always carries out “Maths” calculations in Watts. The
power meter displays the ratio of the channels power values in either dB
or %. When the measurement result is displayed in % a prefix multiplier
may be shown. The power value of each channel includes offsets,
filter, range, offset and calibration factor are set individually for each
channel.
Ratio measurements can be displayed relative to a stored reference. In
relative mode readings are displayed in either dB or %. Refer to “Making
Relative Measurements”, on page 2-37 for further information.
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Power Meter Operation
Selecting a Digital or Analog Display
Selecting a Digital or Analog Display
The measurement windows can display the result in either a digital or
analog format or both as shown in the following figures.
Figure 2-16: Digital Display
Figure 2-17: Analog Display
Figure 2-18: Digital and Analog Display
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Power Meter Operation
Selecting a Digital or Analog Display
To select the format of the display in the currently selected window:
Meas
Display Format
1. Press
2. Press
,
.
Setup
Meter Dgtl Anlg
to highlight the type of format you
require. Pressing this key toggles between a digital and analog
display.
To select the range of the analog display in the currently selected window:
Meas
Setup
Display Format Anlg Mtr Scaling
1. Press
,
,
.
2. The current setting of the maximum and minimum values
Max
displayed on the analog meter are displayed under the
Min
and
softkeys respectively.
3. To change either of these settings press the appropriate softkey.
The power meter displays the current value in a pop up window.
Modify this value (see below) until the desired value is displayed.
■
Use
currently positioned.
Use or to move to other digits.
or
to modify the digit on which the cursor is
■
4. The choices available depend on the unit of measurement selected
and the current measurement mode. If the measurement unit
dB dBm
or . If the
selected is logarithmic, then the choice will be
measurement unit selected is linear, then choose the appropriate
softkeys from the following menus:
%
mW
µW
nW
Cancel
%
Cancel
W
Increment
Multiplier
Increment
Multiplier
More
More
Decrement
Multiplier
Decrement
Multiplier
Cancel
Cancel
Increment Multiplier
Pressing
or
Decrement Multiplier
increases or decreases the multiplier
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Power Meter Operation
Selecting a Digital or Analog Display
% W
% W
shown in front of or . Pressing or after the correct
multiplier has been selected confirms the entry.
To select both an analog and digital display press
are displayed. Select the format of one window to analog and the other to
digital as previously described.
until two windows
To indicate if the measurement reading is outwith the minimum or
maximum values set for the analog meter, a warning message is
displayed. The analog meter also displays a digital reading. This digital
reading allows you to easily set the appropriate minimum and maximum
values for the analog display.
Note
The analog display does not indicate as much measurement data
as the digital display. That is, it does not indicate when duty cycle,
range hold, offset or relative mode are enabled. In addition, it does
not indicate if the measurement is within the test limits if any are
set.
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Power Meter Operation
Setting the Range
Setting the Range
The power meter has no internal ranges which can be set. The only ranges
that can be set are those of the HP E-series power sensors. With an
HP E-series power sensor the range can be set either automatically or
manually. Use autoranging when you are not sure of the power level you
will be measuring. There are two manual settings either “LOWER” or
“UPPER”. The lower range is more sensitive than the higher range.
“LOWER” covers the range of -70 dBm to -13.5 dBm. “UPPER” covers the
range of -14.5 dBm to +20 dBm. The default is “AUTO”.
Note
The following procedure details how to set the range for channel
A. To set the range on channel B use the same procedure using the
B Input Settings
softkey.
To set the range:
System
Inputs
A Input Settings
1. Press
,
. The current setting of the
softkey.
Range
range is displayed under the
Range
2. To change this setting press
. A pop up window appears.
Use
or
to highlight your choice.
Enter
3. To confirm your choice press
.
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Power Meter Operation
Configuring the Remote Interface
Configuring the Remote Interface
This section explains how to configure the power meter for remote control
using either the HP-IB parallel interface or the RS232/422 serial
interface. For further information on using the power meter remotely,
refer to the HP E4418B/E4419B Programming Guide.
HP-IB
System
To select HP-IB as the remote interface press
,
Inputs
Remote Interface Select Interface HPIB
,
,
(IEEE 488).
HP-IB Address
Each device on the HP-IB (IEEE-488) interface must have a unique
address. You can set the power meter’s address to any value between 0
and 30. The address is set to 13 when the power meter is shipped from the
factory.
The address is stored in non-volatile memory, and does not change when
the power is switched off, or after a remote interface reset.
Your HP-IB bus controller has its own address. Avoid using the bus
controller’s address for any instrument on the interface bus.
Hewlett-Packard controllers generally use address 21.
To set the HP-IB address from the front panel:
System
Remote Interface Configure Interface
1. Press
,
,
,
Inputs
HPIB
. The current setting of the HP-IB address is displayed
HP-IB Addr
under the
softkey.
HP-IB Addr
2. To change this setting press
. The power meter
displays the address in a pop up window. Modify this address (see
below) as desired.
■
Use
currently positioned.
Use or to move to other digits.
Enter
or
to modify the digit on which the cursor is
■
3. To confirm your choice press
.
To set the HP-IB address from the remote interface use the:
• SYSTem:COMMunicate:GPIB:ADDResscommand.
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Power Meter Operation
Configuring the Remote Interface
RS232/RS422
With RS232 selected as the serial interface the power meter
communicates through the serial port with single ended drivers and
receivers. With RS422 selsected, the serial port uses balanced drivers and
receivers.
The power meter acts as a DTE device.
System
,
Inputs
Remote Interface Select Interface RS232 RS422
,
,
or
.
RS232/422 Connector
The serial port connector is a 9 pin male D-type wired as shown in
Figure 2-18.
Figure 2-19: RS232/422 Pin Assignment
Pin
RS232
DCD
RS422
CTS-
1
2
3
4
5
6
7
8
9
Rx
Rx-
Tx
Tx+
DTR
GND
DSR
RTS
CTS
RI
Tx-
1
2
3
4
8 9
5
GND
Rx+
6
7
RTS+
CTS+
RTS-
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Power Meter Operation
Configuring the Remote Interface
Setting the RS232/422 Parameters
This section explains how to set the baud rate, word size, parity, number
of stop bits, pacing and echo for the serial interface.
To set the serial interface parameters:
System
Remote Interface Configure Interface
1. Press
,
,
,
Inputs
Serial
Baud rate Word size
. The current settings for
,
,
Stop bits
Parity
and
are shown under the softkeys.
Baud rate
2. To change the baud rate press
. The power meter
displays the baud rate in a pop up window. Change the setting by
using the and keys to run through the selection of baud
Enter
rates available. To confirm your choice press
Word size
.
3. To change the word size press
. The power meter
displays the word size in a pop up window. Change the setting by
using any of the arrow hardkeys to toggle between a word size of 7
Enter
or 8. To confirm your choice press
.
Stop bits
4. To change the number of stop bits press
. The power
meter displays the number of stop bits in a pop up window.
Change the setting by using any of the arrow hardkeys to toggle
Enter
between a setting of 1 or 2. To confirm your choice press
.
Parity
5. To change the parity type press
. The power meter
displays the parity type in a pop up window. Change the setting by
using any of the arrow hardkeys to select from EVEN, ODD,
Enter
ZERO, ONE or NONE. To confirm your choice press
.
More
6. Press
to access page 2 of 2. This page allows you to set echo
off and on and gives access to the pacing menu.
Echo
7. Press
to toggle between off and on. When echo is on, all
received characters will be transmitted (echoed) back to the
sender.
Pacing
8. Press
to access the pacing menu which allows you to
enable/disable various software and hardware pacing options.
Pacing will prevent receiver overrun errors and is generally only
required when large amounts of data are being transferred (for
example, cal tables).
Tx Pacing
9. Press
to toggle between enabling and disabling the
Xon/Xoff transmitter software handshake. When enabled “Xon” is
highlighted, otherwise “None” is highlighted.
Rx Pacing
10. Press
to toggle between enabling and disabling the
Xon/Xoff receiver software handshake. When enabled “Xon” is
highlighted, otherwise “None” is highlighted.
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Power Meter Operation
Configuring the Remote Interface
RTS/CTS
11. Press
and use any of the arrow hardkeys to select one of
the following from the pop up menu:
OFF- Sets the RTS signal line permanently low.
ON- Sets the RTS signal line permanently high.
IBFull- Sets the RTS signal line high while the receiver buffer
can accept more data and sets RTS low when the data buffer is
full. The transmitter is inhibited when CTS is low.
DTR/DSR
12. Press
and use any of the arrow hardkeys to select one of
the following from the pop up menu:
OFF- Sets the DTR signal line permanently low.
ON- Sets the DTR signal line permanently high.
IBFull- Sets the DTR signal line high while the receiver buffer
can accept more data and sets DTR low when the data buffer is
full. The transmitter is inhibited when DSR is low.
DTR/DSR
The
softkey is greyed out if the RS422 interface is selected.
Remote Interface Overview
You can view a summary of your remote interface settings at any time by
System
Remote Interface Interface Overview
pressing
,
,
.
Examples Ionfpuatsn HP-IB and RS422 interface overview are shown in
Figure 2-19.
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Power Meter Operation
Configuring the Remote Interface
Programming Language Selection
You can select one of two languages to program the power meter from the
remote interface. The language is SCPI when the power meter is shipped
from the factory. The other language is the HP 438A programming
language.
The power meter complies with the rules and regulations of the 1995.0
version of SCPI (Standard Commands for Programmable Instruments).
You can determine the SCPI version with which the power meter’s in
compliance by sending the SYSTem:VERSion?command from the remote
interface. You cannot query the SCPI version from the front panel.
The language selection is stored in non-volatile memory, and does not
change when power has been off or after a remote interface reset.
To select the interface language from the front panel:
System
Inputs
Remote Interface Command Set
1. Press
,
,
.
HP 438A
SCPI
2. Select the language you require from
and
.
To select the interface language from the remote interface use the:
• SYSTem:LANGuagecommand
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Power Meter Operation
Recorder Outputs
Recorder Outputs
The rear panel Recorder Output connectors (A and B) produce a dc voltage
that corresponds to the power level in Watts of the channel, depending on
the measurement mode. This dc voltage ranges from 0 to +1 Vdc. The
output impedance is typically 1 kΩ . Channel and display offsets, and duty
cycle have no effect on the Recorder Outputs.
For example, the Recorder Outputs can be used to;
•
•
•
record swept measurements on an X-Y recorder
level an output from a source using external leveling, or
monitor the output power on a strip chart recorder. A setup for
recording swept measurements is shown in Figure 2-20.
See Figure 2-22 for details on which power meter functions are
implemented in the recorder output.
Figure 2-21: Test Setup for Recording Swept Measurements
RECORDER
OUTPUT A
Swept Source
Device
Under Test
SWEEP
OUT
IN
OUT
RF OUT
Power Meter
CHANNEL A
INPUT
X-Y Recorder
X-AXIS (FREQUENCY)
Y-AXIS (POWER)
System
Inputs
More
To access the “Recorder” menu press
Recorder Output ,
,
,
Channel A Channel B
or
depending on which
channel you want to set up. This menu allows you to switch the Recorder
Max Power Min Power
softkeys
Output signal either on or off. The
and
allow you to enter the input power level that you want to represent the
1 V maximum and 0 V minimum output voltage of the Recorder
dc
dc
Output.
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Power Meter Operation
Recorder Outputs
Leveling a Source Output
The Recorder output can be used to level an output from a source using
external leveling. The following procedure explains how to do this:
1. Select the Recorder Output A or B, depending on which channel
System
More
the source is connected to, by pressing
,
,
Inputs
Channel A
Channel B
Recorder Output
,
or
.
2. The highest power you are going to measure is used to determine
the value which you should set for the Recorder Output maximum
setting. For example, if you are measuring a power less than 1 mW
and greater than 100 µW, then set the recorder maximum value to
1 mW.
50 dBm (100 W)
40 dBm (10 W)
30 dBm (1 W)
20 dBm (100 mW)
10 dBm (10 mW)
0 dBm (1 mW)
-10 dBm (100 µW)
-20 dBm (10 µW)
-30 dBm (1 µW)
-40 dBm (100 nW)
-50 dBm (10 nW)
-60 dBm (1 nW)
Max Power
To set the maximum value press
appropriate value.
and enter the
Min Power
3. Press
4. Press
and enter 0 W.
Output Off On
to “On”.
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Power Meter Operation
Saving and Recalling Power Meter Configurations
Saving and Recalling Power Meter Configurations
To reduce repeated setup sequences, up to ten power meter configurations
can be stored in the power meter’s non-volatile memory. The HP-IB
address, the data stored in the sensor calibration tables and the zeroing
and calibration data are not stored by a preset. The calibration table
selected is not affected.
Save
Recall
Power meter configurations are saved and recalled with the
hardkey.
To save the current measurement setup:
Save
Recall
1. Press
.
2. Use the
files. When the required file is highlighted press
Confirm
and
hardkeys to scroll through the displayed
Save
.
3. Press
.
If you require to modify the name of a file:
Save
Recall
1. Press
.
2. Use the
and
hardkeys to scroll through the displayed
Edit Name
files. When the required file is highlighted press
. The
power meter displays the file name in a pop up window. Modify
this name (see below) until the desired name is displayed.
■
Use
or
to modify the character on which the cursor
is currently positioned.
■
■
Use
Use
or
to move to other characters.
Delete Char
Insert Char
and
as required.
Enter
3. To confirm your choice press
.
To recall a measurement setup:
Save
Recall
1. Press
.
2. Use the
files. When the required file is highlighted press
Confirm
and
hardkeys to scroll through the displayed
Recall
.
3. Press
.
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Power Meter Operation
How Measurements are Calculated
How Measurements are Calculated
Figure 2-22 details how measurements are calculated. It shows the
position in which the various power meter functions are implemented in
the measurement calculation.
Figure 2-23: How Measurements are Calculated
Channel Functions
Channel A
Cal Factor
Averaging
Window Functions
Upper Window
Channel
Offset
Duty
Cycle
Freq Dep
Display
Offset
Math,A,B,A/B
B/A,A-B,B-A
Offset
Relative
Limits
Window
Limits
Recorder
Output
Channel B
Averaging
Cal Factor
LowerWindow
Display
Offset
Math,A,B,A/B
B/A,A-B,B-A
Relative
Channel
Offset
Duty
Cycle
Freq Dep
Offset
Window
Limits
Limits
Recorder
Output
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Power Meter Operation
Presetting the Power Meter
Presetting the Power Meter
This section details the power meter’s preset conditions.
The HP-IB address, the data stored in the sensor calibration tables and
the zeroing and calibration data are not affected by a preset. The
calibration table selected is not affected.
Preset Conditions
The number of windows displayed is two.
dBm/W
Measurement units used is set to dBm.
Frequency
Cal Fac
A Freq
•
•
•
•
is set to 50 MHz.
A Cal Fac
is set to 100%.
B Freq
is set to 50 MHz.
B Cal Fac
is set to 100%.
Meas
Setup
Input Select
•
is set to Channel A in the upper window and
Channel B in the lower window.
Display Format
•
•
is set to digital for both windows.
Anlg Mtr Scaling
Max
is set to 20.000 dBm (
) and -70.000 dBm
Min
(
).
Resolution 1 2 3 4
•
•
•
•
•
•
is set to “3”.
is set to “Off”
Max
Limits Off/On
Limits
Min
).
is set to 90.000 dbm (
TTL Output Off/On
) and -90.000 dBm (
is set to “Off”.
Limits OVER UNDER EITHER
Fail O/P High Low
is set to “OVER”.
is set to “Low”
Rel
Offset
Rel Off/On
•
•
is set to “Off”.
Offset Off/On
is set to “Off”.
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Power Meter Operation
Presetting the Power Meter
Offset
•
is set to 0.000 dB.
System
Inputs
Command Set
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
is not affected.
Select Interface
is not affected.
is not affected.
HP-IB Addr
Baud Rate
Word size
Stop bits
is not affected.
is not affected.
is not affecetd.
Parity
Pacing
is not affected.
is not affected.
is not affected.
Echo
A Table Off/On
B Table Off/On
Filter Off/On
is not affected.
is not affected.
is set to “On”.
Filter
is set to “AUTO”.
Duty Cycle Off/On
is set to “Off”.
is set to 1.000%.
Offset Off/On
Duty Cycle
is set to “Off”.
is set to 0.000 dB.
Offset
Range
is set to “AUTO”.
Limits
Max
Min
) and -90.000 dBm ( ).
is set to 90.000 dbm (
Limits Off/On
is set to “Off”.
Power Ref Off/On
Recorder Output
is set to “Off”.
Max Power
is set to 100.0 mW (
) and 0.00 W
Min Power
(
).
Output Off/On
•
•
•
•
is set to “Off”.
Output A B
is set to “A”.
Must Cal Off/On
is not affected.
Backlight
is set to “On”
Zero
Cal
A Ref CF
B Ref CF
•
•
•
is set to 100%.
is set to 100%.
Must Cal Off/On
is not affected.
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Power Meter Operation
Presetting the Power Meter
TTL Inputs Off/On
•
is set to “Off”.
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Power Meter Operation
Self Test
Self Test
The power meter has three distinct self test modes:
•
power on self test, which occurs automatically when you turn on
the power meter.
•
confidence check, which is accessed via the front panel and
requires your assistance in order to verify the POWER REF and
measurement path accuracy.
•
troubleshooting mode, which is accessed via the front panel or
remotely. The front panel softkey menu allows you to run
individual tests, whereas the remote command runs a complete
series of tests as listed in “Remote Testing”, on page 2-69.
Power On Self Test
The power on self test is performed automatically when the power meter
is turned on and takes approximately 10 seconds to complete. The power
on self test consists of the following tests:
•
•
•
•
•
•
RAM Battery
Calibrator
Fan
Serial Interface
Option 001 Battery
Refer to “Test Descriptions”, on page 2-70 if you require a description of
each individual test.
As the power on self test takes place, the message “Testing...” appears
next to the name of the test which is being performed. When each test is
complete, the message “Testing...” is replaced by either the message
“Passed” or “Failed”. The option 001 Battery test can also produce the
message “Not Present”. If a failure occurs the message “Power-up H/W
Err” appears. Any errors are also written to the error queue and can be
System
More
examined in the “Errors” screen by pressing
,
,
Inputs
Error List
.
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Power Meter Operation
Self Test
Front Panel Selection of Self Tests
System
More
Service Self Test
to access a test menu which
Press
,
,
,
Inputs
consists of the following tests:
•
•
•
Instrument Self Test
Confidence Check
Individual, which accesses a menu which consists of the following
tests:
■
■
■
■
■
■
■
Memory
RAM Battery
Measurement Assemblies
Calibrator
Keyboard
Fan
Display, which accesses a menu which consists of the following
tests:
◆
◆
◆
Display Assembly
Display RAM
Bitmap Displays
■
Serial Interface, which accesses a menu which consists of the
following tests:
◆
◆
◆
◆
UART Configuration
Local Loop Back
RS232 Loop Back
RS422 Loop Back
Note
The RS232 and RS422 loop back tests require a specially wired
connector - refer to the E4418B/E4419B Service Guide.
Each of these tests can be run individually. Information on the instrument
self test and confidence check are described on page 2-68. Refer to “Test
Descriptions”, on page 2-70 if you require a description of the other tests.
When an individual test is selected, the message “Testing...” appears
next to the name of the test. When the test is complete, the message
“Testing...” is replaced by either the message “Passed” or “Failed”.
This pass/fail indication excludes the keyboard test and the bitmap
display test, both of which rely on your interaction to detect a failure.
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Power Meter Operation
Self Test
Done
When the individual test is complete, the result is displayed until
is
selected. If the self test failed, information about the failure is displayed
on the screen.
Instrument Self Test
Instrument Self Test
If
is selected, the following tests are run, these
are the same tests which are run using the *TST?command.
•
•
•
•
•
•
•
•
ROM checksum
RAM
RAM Battery
Display Assembly
Calibrator
Measurement Assemblies
Fan
Serial Interface
As each test takes place, the name of the test is listed on the screen. While
a test is running, the message “Testing...” appears next to the name of
the test. As each stage of the test is completed, the message
“Testing...” is replaced by either the message “Passed” or “Failed”.
The confidence check requires you to carry out the following procedure.
Instructions are also displayed on the screen. The confidence check can be
carried out on both channels using the appropriate softkeys.
1. Connect the power sensor to the POWER REF output (Refer to
Table 2-1 on page 2-11 for connection requirements for the
HP 8480 series power sensors). The power reference signal is
turned on automatically after any key is pressed.
2. The power meter automatically makes a power measurement. If
the measured error is within the instrument accuracy
specification the confidence check has been successful.
While the test is running, the message “Testing...” appears. If
the correct power meter reading is made the message “Passed” is
displayed, otherwise “Failed” is displayed.
If the confidence check fails, the failure appears in the error queue. To
examine the error queue go to the “Errors” screen (refer to Chapter 4).
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Power Meter Operation
Self Test
Remote Testing
To invoke the remote self test, the IEEE 488.1 compliant standard
command, *TST?is used. This command runs a full self test and returns
one of the following codes:
•
•
0 - no tests failed
1 - one or more tests failed
The remote self test consists of the following tests:
•
•
•
•
•
•
•
ROM checksum
RAM
RAM Battery
Display Assembly
Calibrator
Measurement Assemblies
Communications Assembly (Implicit)
The communications assembly is tested implicitly, in that the command
will not be accepted or return a result unless the HP-IB interface is
functioning correctly.
Refer to “Test Descriptions”, on page 2-70 if you require a description of
each individual test.
When the *TST?command is executed, the screen is cleared. As each test
takes place, the name of the test is listed on the screen. While a test is
running, the message “Testing...” appears next to the name of the test.
As each stage of the test is completed, the message “Testing...” is
replaced by either the message “Passed” or “Failed”.
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Power Meter Operation
Self Test
Test Descriptions
This section specifies what is actually checked by each of the tests. Some
of the tests may only be applicable to one method of invocation (for
example, from the front panel). If this is the case, it is specified in the test
description. Most of the tests have an associated error message which is
added to the error queue if the test fails. The exception to this is the
bitmap display test. Refer to Chapter 4, “Error Messages” for details on
these error messages.
ROM Checksum
This test calculates the checksum of the firmware and checks it against
the pre-defined checksum stored on the ROM. A pass or a fail result is
returned.
RAM
This test carries out a read and write test on the instrument RAM.
RAM Battery
When the firmware is first downloaded, a known value is written into a
battery-backed memory location. This test verifies that the value is still
resident. It returns a pass if the value is still present, otherwise it returns
a fail.
Measurement Assemblies
A measurement assembly is requested to automatically run a self test.
This self test returns either a pass or a fail. A fail can either be produced
by the measurement assembly self test failing or by the measurement
assembly not responding.
Fan
This test confirms that the internal cooling fan is operating.
Serial Interface
Four tests are available for the serial interface: UART configuration, local
loop back, RS232 loop back and RS422 loop back. Both the RS232 and
RS422 loop back tests require a specially wired connector - refer to the
E4418B/E4419B Service Guide.
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Power Meter Operation
Self Test
•
•
•
UART Configuration - confirms that the baud rate, stop bits and
parity settings are correctly configured on the UART.
Local Loop Back - Tx and Rx on the UART are internally
connected and a test message is sent to confirm correct operation.
RS232/RS422 Loop Back - A message is sent via the UART and
transceivers using an external loop back connector (refer to the
E4418B/E4419B Service Guide).
Option 001 Battery
This test checks that the capacity of the option 001 battery has not
decayed below 70 % of its original value. The test is only performed on
power meters fitted with option 001.
Calibrator
The reference calibrator is turned on (indicated by the POWER REF LED)
and measured internally. A pass or fail result is returned.
Keyboard (Front Panel only)
The power meter enters a mode where you are invited to press any key.
When a key is pressed, its name appears on the screen. You can check that
the power meter is displaying the expected name when the relevant key is
pressed. This is a check that the power meter is receiving the correct
keyboard signal. Pressing the same key twice sequentially exits this mode
and returns you to a display that lists all the keys that were not entered.
If the test is exited without all the keys being pressed a list is displayed
showing all the keys which were not selected.
Display
Three tests are available for the display: the display assembly, display
RAM and bitmap display.
A read/write is performed on the display RAM. If the value which is
written is read back correctly, a pass is recorded, otherwise a fail is
recorded.
The liquid crystal display/ light emitting diode (LCD/LED) control circuits
are tested by making separate voltage measurements via the multiplexer
and digital signal processor. If the expected voltages are measured, a pass
is recorded, otherwise a fail is recorded. The three circuits which are
tested are the LCD contrast control, the LED brightness control and the
display temperature sensing diode.
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Power Meter Operation
Self Test
Bitmap Display (Front Panel only)
A series of bitmaps are displayed on the power meter showing: two
checkboards, vertical lines, horizontal lines, oblique lines, all pixels on and
More
Prev
all pixels off. Pressing
cycles you through these bitmaps. The
key stops the display and returns you to the previous menu.
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Power Meter Operation
Operator Maintenance
Operator Maintenance
This section describes how to replace the power line fuse and clean the
power meter. If you need additional information about replacing parts or
repairing the power meter, refer to the HP E4418B/E4419B Service
Guide.
To clean the power meter, disconnect it’s supply power and wipe with a
damp cloth only.
The power line fuse is located within the power meter’s fuse holder
number 2110-0957).
Note
The power meter also has an internal fuse. If you suspect that this
fuse needs replaced it must be done by trained service personnel.
Please refer to “Returning Your Power Meter for Service”, on
1. Remove the power cord from the power meter.
2. Slide the fuse holder assembly from the rear panel as shown in
Figure 2-23.
3. Install the correct fuse in the “In line” position as shown in
Figure 2-23. (A spare fuse can be stored in the fuse holder
assembly.)
4. Replace the fuse holder assembly in the rear panel.
Figure 2-24: Replacing the Fuse
In line fuse
Spare fuse
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Power Meter Operation
Contacting Hewlett-Packard
This section details what to do if you have a problem with your power
meter.
“Before calling Hewlett-Packard”, on page 2-74. This chapter contains a
If you wish to contact Hewlett-Packard about any aspect of the power
meter, from service problems to ordering information, refer to “Sales and
Service Offices”, on page 2-77.
If you wish to return the power meter to Hewlett-Packard refer to
Before calling Hewlett-Packard
Before calling Hewlett-Packard or returning the power meter for service,
please make the checks listed in “Check the Basics”, on page 2-75. If you
still have a problem, please read the warranty printed at the front of this
guide. If your power meter is covered by a separate maintenance
agreement, please be familiar with the terms.
meter after warranty expiration. Call your HP Sales and Service Center
for full details.
If the power meter becomes faulty and you wish to return the faulty
instrument, follow the description on how to return the faulty instrument
in the section “Sales and Service Offices”, on page 2-77.
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Power Meter Operation
Contacting Hewlett-Packard
Check the Basics
Problems can be solved by repeating what was being performed when the
problem occurred. A few minutes spent in performing these simple checks
may eliminate time spent waiting for instrument repair. Before calling
Hewlett-Packard or returning the power meter for service, please make
the following checks:
•
•
Check that the line socket has power.
Check that the power meter is plugged into the proper ac power
source.
•
•
•
Check that the power meter is switched on.
Check that the line fuse is in working condition.
Check that the other equipment, cables, and connectors are
connected properly and operating correctly.
•
•
used when the problem occurred.
Check that the test being performed and the expected results are
within the specifications and capabilities of the power meter.
Check the power meter display for error messages. Refer to
Chapter 4 for further information.
•
•
Check operation by performing the self tests.
Check with a different power sensor.
Instrument serial numbers
Hewlett-Packard makes frequent improvements to its products to enhance
their performance, usability and reliability. Hewlett-Packard service
personnel have access to complete records of design changes for each
instrument, based on the instruments’ serial number and option
designation.
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Power Meter Operation
Contacting Hewlett-Packard
Whenever you contact Hewlett-Packard about your power meter have a
complete serial number available. This will ensure that you obtain the
most complete and accurate service information. The serial number can be
obtained by:
•
•
•
interrogating the power meter over the HP-IB using the *IDN?
command.
System
More
Service
from the front panel by selecting
Version
,
,
,
Inputs
.
from the serial number label.
The serial number label is attached to the rear of each Hewlett-Packard
instrument. This label has two instrument identification entries. The first
provides the instruments serial number and the second provides the
identification number for each option built into the instrument.
The serial number is divided into two parts: the prefix (two letters and the
first four numbers), and the suffix (the last four numbers).
•
The prefix letters indicate the country of manufacture. This code is
based on the ISO international country code standard, and is used
to designate the specific country of manufacture for the individual
product. The same product number could be manufactured in two
different countries. In this case the individual product serial
numbers would reflect different country of manufacture codes. The
prefix also consists of four numbers. This is a code identifying the
date of the last major design change.
•
The suffix indicates an alpha numeric code which is used to ensure
unique identification of each product throughout
Hewlett-Packard.
SERIAL NUMBER
SER
OPT
GB12345678
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Power Meter Operation
Contacting Hewlett-Packard
Sales and Service Offices
If you need technical assistance with a Hewlett-Packard test and
measurement product or application please contact the Hewlett-Packard
office or distributor in your country.
Asia Pacific:
Hong Kong: (852) 2599 7889
India: (91-11) 647 2311
Japan:
Hewlett-Packard Japan Ltd.
Measurement Assistance Center
9-1, Takakura-Cho, Hachioji-Shi,
Tokyo 192, Japan
Tel: (81-426) 56-7832
Fax: (81-426) 56-7840
Korea: (82-2) 769 0800
Malaysia: (60-3) 291 0213
Philippines: (63-2) 894 1451
PRC: (86-10) 6505 0149
Singapore: (1800) 292 8100
Taiwan: (886-3) 492 9666
Thailand: (66-2) 661 3900
For countries in Asia Pacific not listed contact:
Hewlett-Packard Asia Pacific Ltd
17-21/F Shell Tower, Times Square,
1 Matheson Street, Causeway Bay,
Hong Kong
tel: (852) 2599 7070
fax: (852) 2506 9285
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Power Meter Operation
Contacting Hewlett-Packard
Australia/New Zealand:
Hewlett-Packard Australia Ltd.
31-41 Joseph Street
Blackburn, Victoria 3130
Australia
1 800 629 485
Canada:
Hewlett-Packard Canada Ltd.
5150 Spectrum Way
Mississauga, Ontario
L4W 5G1
(905) 206 4725
In Europe, Africa and Middle East please call your local HP sales office or
representative:
Austria: (1) 25000-0
Belgium and Luxembourg: (02) 778 3417
Baltic Countries: (358) 08872 2100
Czech Republic: (0042) 2-4743111
Denmark: 45 99 10 00
Finland: (90) 88 721
France: (0) 1 69.29.41.14
Germany: (0180) 532 62-33
Greece: (1) 7264045
Hungary: (1) 252 4705
Ireland: (01) 284 4633
Israel: (03) 5380 333
Italy: 02 - 92 122 241
Netherlands: (020) 547 6669
Norway: (22) 73 56 50
Poland: (22) 608 7700
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Contacting Hewlett-Packard
Portugal: (11) 482 85 00
Russia: tel (7/095) 928 6885, fax (7/095) 916 9844
South Africa: (011) 806 1000
Spain: (34) 1 631 1323
Sweden: (08) 444 22 77
Switzerland: (01) 735 7111
Turkey: (212) 224 59 25
United Kingdom: (01344) 366 666
For countries in Europe/Middle East and Africa not listed, contact:
Hewlett-Packard
International Sales Europe
Geneva, Switzerland
Tel: +41-22-780-4111
Fax: +41-22-780-4770
Latin America:
Hewlett-Packard
Latin American Region Headquarters
5200 Blue Lagoon Drive
9th Floor
Miami, Florida 33126
USA
(305) 267 4245/4220
United States:
Hewlett-Packard Company
Test and Measurement Organization
5301 Stevens Creek Blvd.
Bldg. 51L-SC
Santa Clara, CA 95052-8059
1 800 452 4844
In any correspondence or telephone conversations, refer to the power
meter by its model number (which is on the front panel) and full serial
number (which is on the rear panel). With this information, the HP
representative can quickly determine whether your unit is still within its
warranty period.
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Power Meter Operation
Contacting Hewlett-Packard
Returning Your Power Meter for Service
Use the information in this section if you need to return your power meter
to Hewlett-Packard.
Package the Power Meter For Shipment
Use the following steps to package the power meter for shipment to
Hewlett-Packard for service:
1. Fill in a blue service tag (available at the end of this guide) and
attach it to the power meter. Please be as specific as possible about
the nature of the problem. Send a copy of any or all of the
following information:
■
Any error messages that appeared on the power meter display.
Any information on the performance of the power meter.
■
Caution
Power meter damage can result from using packaging materials
other than those specified. Never use styrene pellets in any shape
as packaging materials. They do not adequately cushion the power
meter or prevent it from shifting in the carton. Styrene pellets
cause power meter damage by generating static electricity and by
lodging in the rear panel.
2. Use the original packaging materials or a strong shipping
container that is made of double-walled, corrugated cardboard
with 159 kg (350 lb) bursting strength. The carton must be both
large enough and strong enough to accommodate the power meter
and allow at least 3 to 4 inches on all sides of the power meter for
packing material.
3. Surround the power meter with at least 3 to 4 inches of packing
material, or enough to prevent the power meter from moving in
the carton. If packing foam is not available, the best alternative is
TM
SD-240 Air Cap
from Sealed Air Corporation (Commerce, CA
90001). Air Cap looks like a plastic sheet covered with 1-1/4 inch
air filled bubbles. Use the pink Air Cap to reduce static electricity.
Wrap the power meter several times in the material to both
protect the power meter and prevent it from moving in the carton.
4. Seal the shipping container securely with strong nylon adhesive
tape.
5. Mark the shipping container “FRAGILE, HANDLE WITH CARE”
to ensure careful handling.
6. Retain copies of all shipping papers.
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Contacting Hewlett-Packard
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Menu Reference
Introduction
Introduction
This chapter is a reference to the softkey menu structure of the power
meter.
“The Front Panel Menu Maps” starting on page 3-3 details the menus
diagrammatically.
“Front Panel Menu Reference” starting on page 3-12 details the menus
descriptively.
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Menu Reference
The Front Panel Menu Maps
The Front Panel Menu Maps
The following diagrams detail the structure of the softkey menus which
are accessed through the following seven hardkeys:
dBm/W
•
Frequency
Cal Fac
•
Meas
Setup
•
Rel
Offset
•
Save
Recall
•
System
Inputs
•
Zero
Cal
•
Note
On your power meter some softkey labels have numeric values
displayed under them. These values show the current setting of
that softkey. Since these values are variable they are shown in a
grayed out text on the following menu maps.
dBm/W Menu
dBm
W
dBm/W
dB
%
Note
Depending on the power meter’s setup you will be unable to select
certain softkeys. The text on these softkey labels appears grayed
out. Refer to the appropriate softkey descriptions for further
information.
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Menu Reference
The Front Panel Menu Maps
Frequency/Cal Fac Menu
A Freq
50 .00MHz
A Cal Fac
100.0%
Frequency
Cal Fac
B Freq
50 .00MHz
B Cal Fac
100.0%
Note
Depending on the power meter’s setup you will be unable to select
certain softkeys. The text on these softkey labels appears grayed
out. Refer to the appropriate softkey descriptions for further
information.
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Menu Reference
The Front Panel Menu Maps
Meas Setup Menu
A
B
Input
Select
A/B
Display
Format
Meas
Setup
B/A
A-B
Resolution
1 2 3 4
Limits
B-A
More
Max
20.000 dBm
Meter
Dgtl Anlg
Min
-70.000 dBm
Anlg Mtr
Scaling
Off On
Max
90.000 dBm
TTL Output
Off On
Min
-90.000 dBm
Limits
OVER
TTL
Output
Fail O/P
High Low
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Menu Reference
The Front Panel Menu Maps
Rel/Offset Menu
Rel
Off On
Rel
Rel
Offset
Offset
Off On
Offset
0.000dB
Save/Recall Menu
Save
Enter
Recall
Save
Insert
Char
Recall
Edit
Name
Done
Delete
Char
Cancel
Note
Depending on the power meter’s setup you will be unable to select
certain softkeys. The text on these softkey labels appears grayed
out. Refer to the appropriate softkey descriptions for further
information.
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Menu Reference
The Front Panel Menu Maps
System Inputs Menu (1 of 4)
See page 3-9
Change
Insert
Sensor Cal
Tables
Edit
Table
Delete
Done
Freq Dep
Offset
A Table
Off On
A Linearity
ATyp DTyp
B Table
Off On
B Linearity
ATyp DTyp
Done
Remote
Interface
Offset
Off On
Tables
System
Inputs
Offset
0.000 dB
Limits
Off On
A Input
Settings
Range |
AUTO
Max
100 mW
B Input
Setting
Limits
Min
0.00 mW
Duty Cycle
Off On
Filter
Off On
Duty Cycle
1.000%
Mode
More
MAN AUTO
Ch A/B
Filter
Length
128
Step Det
Off On
† HP E-series power sensors only
Note
Depending on the power meter’s setup you will be unable to select
certain softkeys. The text on these softkey labels appears grayed
out. Refer to the appropriate softkey descriptions for further
information.
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Menu Reference
The Front Panel Menu Maps
System Inputs Menu (2 of 4)
Clear
Errors
Next
Power Ref
Off On
Output
Off On
Error
List
Done
System
Inputs
More
Max Power
100.0mW
Recorder
Output
Channel A
Min Power
0.000W
Channel B
Service
Must Cal
Off On
More
Self Test
Display
Version
Battery
(See page 3-10)
More
Serial
Diagnostic
(See page 3-10)
Instrument
Self Test
Memory
Display
Assy
Confidence
Check
Lithium
Battery
Display
RAM
Individual
Measure
Assemblies
Bitmap
Displays
Calibrator
Keyboard
UART
Config
Fan
Local
Loop Back
Set Contrast
More
RS232
Loop Back
RS422
Loop Back
Display
Set Brightness
Serial
Interface
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Menu Reference
The Front Panel Menu Maps
System Inputs Menu (3 of 4)
SCPI
HP438A
HPIB Addr
13
HPIB
(IEEE 488)
Cmd Set
RS232
RS422
Select
Interface
Remote
Interface
Configure
Interface
Baud Rate
9600
System
Inputs
Interface
Overview
HPIB
See page 3-7
Word Size
8
Serial
Stop Bits
1
Tx Pacing
None Xon
Parity
NONE
Rx Pacing
None Xon
More
Pacing
RTS/CTS
OFF
Echo
On Off
DTR/DSR
OFF
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Menu Reference
The Front Panel Menu Maps
System Inputs Menu (4 of 4)
Power Ref
Off On
See page 3-8
Error List
System
Inputs
More
Self Test
Recorder
Output
See page 3-8
Display
Version
Service
TX
Break
Status
Serial Diagnostic
Battery
Reset
Backlight
On
More
Backlight
Off
Backlight
Timed
Done
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Menu Reference
The Front Panel Menu Maps
Zero/Cal Menu
Zero A
Zero B
Zero
Cal
Cal A
Zero
Both
A Ref CF
100.0%
Cal
Cal B
Must Cal
Off On
B Ref CF
100.0%
TTL Inputs
Off On
More
Power Ref
Off On
More
Note
Depending on the power meter’s setup you will be unable to select
certain softkeys. The text on these softkey labels appears grayed
out. Refer to the appropriate softkey descriptions for further
information.
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Menu Reference
Front Panel Menu Reference "dBm/W" Menu
Front Panel Menu Reference
This section describes all the hardkeys and softkeys on your power meter.
The hardkey descriptions are in alphabetical order. The softkey
descriptions are in the order they appear in the menus. Diagrammatical
hardkeys are described at the end of this section.
The hardkeys can be separated into three categories, those which affect:
•
•
the system setup, for example the HP-IB address.
the currently selected window setup, for example the
measurement units.
•
the channel setup, for example channel offsets.
dBm/W
The softkey menu structured to this hardkey affects the currently selected
window. Press to select the upper or lower measurement window on
the power meter’s display. The window which is selected is highlighted by
a shadowed box, and the set up you create is implemented in this window.
Press this hardkey to access the “dBm/Watts” menu which allows you to
select the measurement units. These can either be logarithmic (dBm or
dB) or linear (Watt or %). The default is logarithmic. The text on some
softkeys may appear grayed out. This indicates that they are not a
relevant unit of measurement in the currently selected window. Refer to
“Setting the Units of Measurement”, on page 2-35 for further information.
dBm
•
•
•
•
Press this softkey to display the measurement results in dBm.
W
Press this softkey to display the measurement results in Watts.
dB
Press this softkey to display the measurement results in dB.
%
Press this softkey to display the measurement results in %.
3-12
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Menu Reference
Front Panel Menu Reference "Frequency/Cal Fac" Menu
Frequency
Cal Fac
The softkey menu structured to this hardkey affects the channel setup.
Press this hardkey to access the “Frequency/Cal Fac” menu which allows
you to enter the frequency of the signal to be measured or the calibration
factor. Depending on the type of power sensor connected, and whether or
not a sensor calibration table or frequency dependent offset table is
selected, the text on some softkeys may appear grayed out. This indicates
that they are not relevant in the power meter’s current mode of operation.
Table 3-1 details the relevant softkeys in various modes of operation.
Table 3-1
Sensor Calibration Table
Selected
Sensor Calibration Table
Not Selected
Sensor
Model
Frequency
A Freq
Cal Factor
A Cal Fac
B Cal Fac
Frequency
A Freq
Cal Factor
A Cal Fac
B Cal Fac
B Freq
B Freq
HP 8480
series
power
Frequency can
be entered.
Default value
is 50 MHz.
The Cal Factor is
obtained from the
sensor calibration
table but can be
overridden by this
softkey.
Frequency can
be entered if a
frequency
dependent
offset table is
selected.
The Cal Factor can
be entered. Default
value is 100%.
sensors
HP E-series
power
sensors
Not Applicable
Not Applicable
Frequency can
be entered.
Default value
is 50 MHz.
The Cal Factor
cannot be entered, it
is obtained from the
EEPROM in the
power sensor.
A Freq
•
Press this softkey to enter the frequency of the signal to be
measured on channel A, in the range of 0.001 MHz to
999.999 GHz. The default value is 50 MHz. Use the
,
,
and hardkeys to change the frequency. To confirm your
choice press the appropriate frequency unit. Entering a frequency
using this softkey is only possible when you have a sensor
calibration table or frequency dependent offset table selected or
you are using an HP E-series power sensor.
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Menu Reference
Front Panel Menu Reference "Frequency/Cal Fac" Menu
A Cal Fac
•
•
Press this softkey to enter the measurement calibration factor for
channel A in the range of 1% to 150%. The default value is 100%.
Use the
calibration factor. To confirm your choice press . Entering a
calibration factor using this softkey is only possible when you are
using an HP 8480 series power sensor.
,
,
and
hardkeys to change the
%
B Freq
Press this softkey to enter the frequency of the signal to be
measured on channel B, in the range of 0.001 MHz to
999.999 GHz. The default value is 50 MHz. Use the
,
,
and hardkeys to change the frequency. To confirm your
choice press the appropriate frequency unit. Entering a frequency
using this softkey is only possible when you have a sensor
calibration table selected or you are using an HP E-series power
sensor.
B Cal Fac
•
Press this softkey to enter the measurement calibration factor for
channel B in the range of 1% to 150%. The default value is 100%.
Use the
,
,
and
hardkeys to change the
%
calibration factor. To confirm your choice press . Entering a
calibration factor using this softkey is only possible when you are
using an HP 8480 series power sensor.
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Menu Reference
Front Panel Menu Reference "Meas/Setup" Menu
Meas
Setup
The softkey menu structured to this hardkey affects the currently selected
window. Press to select the upper or lower measurement window on
the power meter’s display. The window which is selected is highlighted by
a shadowed box, and the set up you create is implemented in this window.
Press this hardkey to access the “Meas Setup” menu. This menu allows
you to set up a variety of conditions in the currently selected
measurement window, for example: an analog or digital display,
measurement limits, resolution and channel selection.
Press this softkey to access a menu which allows you to select the
channel to be displayed.
■
Press this softkey to display channel A. Refer to “Channel
Measurements”, on page 2-52 for further information.
B
■
Press this softkey to display channel B. Refer to “Channel
Measurements”, on page 2-52 for further information.
A/B
■
Press this softkey to display the ratio of channel A power to
Measurements”, on page 2-54 for further information.
B/A
■
Press this softkey to display the ratio of channel B power to
Measurements”, on page 2-54 for further information.
A-B
■
Press this softkey to display the numerical difference between
information.
B-A
■
Press this softkey to display the numerical difference between
channel B power and channel A power (B-A). Refer to “Making
Difference Measurements”, on page 2-53 for further
information.
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Menu Reference
Front Panel Menu Reference "Meas/Setup" Menu
Display Format
•
digital or analog displays, set the resolution and set the limits for
the analog display.
Meter Dgtl Anlg
■
Press this softkey to toggle between an analog and digital
display. Refer to “Selecting a Digital or Analog Display”, on
page 2-55 for further information.
■ Anlg Mtr Scaling
Press this softkey to access a menu which allows you to enter
the maximum and minimum scale limits shown on the analog
display.
Max
◆
Press this softkey to enter the maximum scale value shown
on the analog display.
Min
◆
Press this softkey to enter the minimum scale value shown
on the analog display.
Resolution 1 2 3 4
•
Press this softkey to choose from four levels of resolution. The
resolution can be specified in dB or digits depending on the
measurement suffix used. The suffix used is the one which is
dBm/W
selected in the
represent:
menu. These four levels (1, 2, 3, 4)
1, 0.1, 0.01, 0.001 dB respectively if the measurement suffix is
dBm or dB.
1, 2, 3 or 4 significant digits respectively if the measurement suffix
is W or %.
Limits
•
Press this softkey to access a menu where you can enter upper and
lower limits for each display window which when exceeded will
output a TTL logic level (if enabled) at the rear panel TTL
Outputs. Refer to “Setting Window Limits”, on page 2-47 for
further information.
Limits Off On
■
Press this softkey to toggle between the test limits being on or
off. The default is “Off”.
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Menu Reference
Front Panel Menu Reference "Meas/Setup" Menu
Max
■
■
■
Press this softkey to enter the upper measurement limit. The
measurement units of the limits will be the same as the
measurement units in the currently selected window. On
instrument preset, the default value is either 90.000 dBm, 1
mW, 60 db, or 100 M% depending on the windows unit. Use
the
,
,
and
hardkeys to change the value.
To confirm your choice press the appropriate measurement
units.
Min
Max
Min
must be greater than
.
Press this softkey to enter the lower measurement limit. The
measurement units of the limits will be the same as the
measurement units in the currently selected window. On
instrument preset, the default value is either -90.000 dBm,
1 pW, -120 dB or 100 p% depending on the windows unit. Use
the
To confirm your choice press the appropriate measurement
Min Max
,
,
and
hardkeys to change the value.
units.
must be less than
.
TTL Output
Press this softkey to access a menu which allows you to control
the rear panel TTL Outputs. You can:
Switch the TTL Outputs on or off.
Set the TTL Output level to active high or low.
Determine whether the TTL Output represents an over
limit condition, under limit condition or both.
TTL Output Off On
◆
◆
◆
Press this softkey to toggle between switching the TTL
Output off and on.
Limits OVER UNDER EITHER
Press this softkey to select whether the TTL output reflects
an overlimit condition, under limit condition or both.
Fail O/P HIGH LOW
Press this softkey to select whether a high or low level TTL
Output represents a limits failure.
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Menu Reference
Front Panel Menu Reference "More", "Preset/Local", "Prev" Keys
More
Press this hardkey to move through all the softkeys available on a
particular level of a menu. The bottom right of the power meter display
indicates the number of pages in the menu. For example, if “1 of 2” is
More
More
displayed, pressing
moves you to “2 of 2”. Pressing
again
moves you back to “1 of 2”.
Preset
Local
Press this hardkey to preset the power meter if you are currently working
in local mode (that is, front panel operation). A confirmation pop up
window is displayed prior to a preset being carried out. Presetting the
power meter returns you to the “Contrast” menu. However, if you are in
remote mode (that is, HP-IB operation), then pressing this hardkey places
the power meter in local mode provided local lock out (LLO) is not enabled.
When reverting to local mode the power meter triggering is set to free run.
Prev
Press this hardkey to move back one level in the softkey menu structure.
Pressing this hardkey numerous times eventually returns you to the
“Contrast” menu which allows you to increase or decrease the display
contrast.
•
Press this softkey to increase the display contrast.
•
Press this softkey to decrease the display contrast.
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Menu Reference
Front Panel Menu Reference "Rel/Offset" Menu
Rel
Offset
The softkey menu structured to this hardkey affects the currently selected
window.
Press this hardkey to access the “Rel/Offset” menu which allows you to;
compare any measurement result in dB or percentage (%) to a reference
value and set display offsets.
Rel Off On
•
Press this softkey to toggle the reference value on or off. The
Rel
default is “Off”. The reference value is set using
.
Rel
•
Press this softkey to use the current reading as the reference
value. This allows you to compare any measurement result in dB
Rel Off On
or percentage (%).
is automatically set to “On” when
Rel
is pressed.
Offset Off On
Press this softkey to toggle the display offset value on or off. The
•
•
Offset
default is “Off”. The offset value is set using
.
Offset
Press this softkey to enter a display offset value. Use the
and hardkeys to change the value. To confirm
your choice press
“On” when a value is entered using
,
,
dB Offset Off On
.
is automatically set to
Offset
.
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Menu Reference
Front Panel Menu Reference "Save/Recall" Menu
Save
Recall
The softkey menu structured to this hardkey affects the system setup.
Press this hardkey to access the “Save/Recall” menu and screen which
allows you to save and recall setups which you use frequently.
Save
•
•
•
Press this softkey to save the current setup of the power meter to
the highlighted file. First, use the
scroll through the displayed files. When the required file is
highlighted press
and
hardkeys to
Save
.
Recall
Press this softkey to recall a required power meter setup from the
highlighted file. First, use the and hardkeys to scroll
through the displayed files. When the required file is highlighted
Recall
press
Edit Name
Press this softkey to change a file name. First, use the
hardkeys to scroll between the displayed files. When the file
.
and
Edit Name
name you require to change is highlighted press
pop up window appears on the screen. Use the
. A
,
,
,
Insert Char
Delete Char
,
and
keys to change the file
Enter
name. To confirm your choice press
.
Enter
■
Press this softkey to accept your edited file name as a new
name.
Insert Char
■
Press this softkey to insert an additional character. The
character is inserted prior to the one which is currently
highlighted. A maximum of 12 characters can be used.
Delete Char
■
■
Press this softkey to delete the character which is currently
highlighted. The minimum number of characters allowed is 1.
Cancel
Press this softkey to revert back to the original file name,
ignoring your editing.
Done
•
Press this softkey to return to the measurement screen.
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Menu Reference
Front Panel Menu Reference "System/Inputs" Menu
System
Inputs
The softkey menu structured to this hardkey affects the system setup and
the channel setup.
Press this hardkey to access the “System/Inputs” menu. This menu allows
you to set up a variety of conditions for your power meter, for example:
HP-IB address, serial interface parameters, sensor calibration tables,
averaging, duty cycle, range, offset, service. It also allows you to review
errors.
Remote Interface
•
Press this softkey to access a menu which allows you to select and
to use, or obtain an interface overview
Command Set
■
Press this softkey to access a menu which allows you to select
the remote programming language you want to use. Refer to
“Programming Language Selection”, on page 2-64 for further
information.
SCPI
◆
Press this softkey to select SCPI (Standard Commands for
Programmable Instruments) as the remote programming
language you want to use.
HP 438A
◆
Press this softkey to select the HP 438A emulation mode. In
this mode the power meter responds to the HP 438A
programming command set.
Select Interface
■
Press this softkey to access a menu which allows you to select
between HP-IB, RS232 and RS422 as the remote interfaace
standard.
HP-IB
◆
Press this softkey to select the HP-IB port for remote
operation.
RS232
◆
Press this softkey to select the serial port for remote
operation using the RS232 Standard.
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Menu Reference
Front Panel Menu Reference "System/Inputs" Menu
RS422
◆
Press this softkey to select the serial port for remote
operation using the RS422 Standard.
Configure Interface
■
Press this softkey to access a menu which allows you to either
configure the HP-IB interface or the serial interface
(RS232/RS422).
HP-IB
◆
Press this softkey to access a menu which allows you to set
the HP-IB address.
Press this softkey to set the HP-IB address of your power
meter between 0 and 30. The default value is 13. A pop up
window appears on the screen. Use the
,
,
and
choice press
hardkeys to change the value. To confirm your
Enter
. Refer to “HP-IB Address”, on
page 2-59 for further information.
Serial
◆
Press this softkey to access a menu which allows you to set
baud rate, word size, parity, number of stop bits, pacing and
echo for the serial interface.
Baud Rate
❖
Press this key to set the serial interface baud rate. The
default value is 9600. A pop up window appears on the
screen giving a range of values (50,75,110,150, 300, 1200,
1800, 2000, 2400, 3600, 4800, 7200, 9600, 19.2K, 38.4K,
57.6K or 115.2K).
Word Size
❖
❖
❖
Press this softkey to set the serial interface word length. A
pop up window appears on the screen giving a selection of
7 or 8.
Stop Bits
Press this softkey to set the serial interface number of stop
bits. A pop up window appears on the screen giving a
selection of 1 or 2.
Parity
Press this softkey to enable /disable parity and set the
parity type for the serial interface. A pop up window
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Menu Reference
Front Panel Menu Reference "System/Inputs" Menu
appears on the screen allowing you to select from ODD,
EVEN, ZERO, ONE or NONE.
Pacing
❖
Press this softkey to access a menu which allows you to
enable/disable various hardware and software pacing
options.
Tx Pacing
❏
❏
❏
Press this softkey to toggle between enabling and
disabling the Xon/Xoff transmitter software handshake.
When enabled “Xon” is highlighted, otherwise “None” is
highlighted.
Rx Pacing
Press this softkey to toggle between enabling and
disabling the Xon/Xoff receiver software handshake.
When enabled “Xon” is highlighted, otherwise “None” is
highlighted.
RTS/CTS
Press this softkey to obtain a pop up window which
allows you to select one of the following:
OFF- Sets the RTS signal line permanently low.
ON- Sets the RTS signal line permanently high.
IBFull- Sets the RTS signal line high while the
receiver buffer can accept more data and sets
RTS low when the data buffer is full. The
transmitter is inhibited when CTS is low.
DTR/DSR
❏
Press this softkey to obtain a pop up window which
allows you to select one of the following:
OFF- Sets the DTR signal line permanently low.
ON- Sets the DTR signal line permanently high.
IBFull- Sets the DTR signal line high while the
receiver buffer can accept more data and sets
DTR low when the data buffer is full. The
transmitter is inhibited when DSR is low.
This key is greyed out if RS422 interface is selected.
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Menu Reference
Front Panel Menu Reference "System/Inputs" Menu
Echo
❖
Press this softkey to toggle Echo “On” or “Off”. When Echo
is enabled, received characters are transmitted back to the
sender.
Tables
•
Press this softkey to access a menu which allows you to
select between sensor calibration tables and frequency
dependent offset tables.
Sensor Cal Tables
■
Press this softkey to access a menu and screen which allows
you to select and edit sensor calibration tables. Use the
and
hardkeys to scroll through the displayed sensor
calibration tables. Sensor calibration tables are only required
for the HP 8480 series power sensors.
Edit Table
◆
Press this softkey to access a menu and screen which allows
you to modify, add and remove frequency, calibration factors
and offsets from the currently selected table and modify the
table name. Use the
,
,
and
hardkeys to
move between the name, frequency, calibration factors and
Change Insert Delete
or as follows:
offsets. Press
,
Change
❖
Press this softkey to modify the highlighted parameter,
which is either a frequency, calibration factor, offset or
table name. A pop up window displays the parameter. Use
the
,
,
and
hardkeys to change the
Enter
parameter value. To confirm your choice press
.
Insert
❖
❖
❖
Press this softkey to insert a new table entry. You are
prompted to enter the frequency and calibration factor or
offset. The entry is inserted in ascending frequency order.
Delete
Press this softkey to delete a table entry. If you delete the
frequency the corresponding calibration factor or offset is
also removed and vice versa.
Done
Press this softkey to return to the measurement screen.
The softkeys from the first level of the “System/Inputs”
menu are displayed.
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Menu Reference
Front Panel Menu Reference "System/Inputs" Menu
Freq Dep Offset
■
Press this softkey to access a menu and screen which allows
you to select and edit frequency dependent offset tables. Use
the
and
hardkeys to scroll through the displayed
frequency dependent offset tables.
Edit Table
◆
Press this softkey to access a menu and screen which allows
you to modify, add and remove frequency, calibration factors
and offsets from the currently selected table and modify the
table name. Use the
,
,
and
hardkeys to
move between the name, frequency, calibration factors and
Change Insert Delete
or as follows:
offsets. Press
,
Change
❖
Press this softkey to modify the highlighted parameter,
which is either a frequency, calibration factor, offset or
table name. A pop up window displays the parameter. Use
the
,
,
and
hardkeys to change the
Enter
parameter value. To confirm your choice press
.
Insert
❖
❖
❖
Press this softkey to insert a new table entry. You are
prompted to enter the frequency and calibration factor or
offset. The entry is inserted in ascending frequency order.
Delete
Press this softkey to delete a table entry. If you delete the
frequency the corresponding calibration factor or offset is
also removed and vice versa.
Done
Press this softkey to return to the measurement screen.
The softkeys from the first level of the “System/Inputs”
menu are displayed.
A Table Off On
◆
◆
Press this softkey to enable and disable the highlighted table
for channel A. “A” or “B” is displayed beside each table to
indicate it’s current state and use.
B Table Off On
Press this softkey to enable and disable the highlighted table
for channel B. “A” or “B” is displayed beside each table to
indicate it’s current state and use.
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Menu Reference
Front Panel Menu Reference "System/Inputs" Menu
Done
◆
Press this softkey to return to the measurement screen. The
softkeys from the first level of the “System/Inputs” menu are
displayed.
A Linearity ATyp DTyp
B Linearity ATyp DTyp
and
■
Press these softkeys to select the type of linearity correction
that will be applied to the channel A and channel B sensors
being used. For most 8480 series sensors the correct (A type or
D type) linearity correction table is automatically selected.
However, for the V8486A and W8486A sensors the automatic
selection must be overriden and the D type correction selected.
Subsequent connection of another A type sensor will result in
a warning message stating that “Linearity Override May be
Required”.
A Input Settings
B Input Settings
and
•
Press these softkeys to access a menu which allows you to modify
the settings of the averaging, duty cycle, range and offset of
channel A and channel B respectively.
Offset Off On
■
Press this softkey to toggle the channel offset value on or off.
Offset
The default is “Off”. The offset value is set using
.
Offset
■
Press this softkey to enter a channel offset in the range of
-100 dB to +100 dB. The default value is 0 dB. Use the
,
and
hardkeys to change the value. To confirm
. This offset can be used to compensate
dB
your choice press
for a loss or gain. The offset is applied to the measured power
Offset Off On
before the result is displayed.
automatically set to “On” when a value is entered using
Offset
is
. Refer to “Setting Channel Offsets”, on page 2-39 for
further information.
Press this softkey to set the range in which you require the
power meter to make the power measurement or set the power
meter to autoranging. Choose either “UPPER”, “LOWER” or
“AUTO” from the selection available using the
and
hardkeys. The default is “AUTO”. Refer to “Setting the Range”,
on page 2-58 for further information.
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Menu Reference
Limits
■
Press this softkey to access a menu which allows you to enter
the upper and lower measurement limits. Refer to “Setting
Measurement Limits”, on page 2-46 for further information.
Limits Off On
◆
◆
Press this softkey to toggle between the test limits being on
or off. The default is “Off”.
Max
Press this softkey to enter the upper measurement limit in
the range -150 dBm to 230 dBm. The default value is
90.00 dBm. Use the
change the value. To confirm your choice press the
Max
,
,
and
hardkeys to
appropriate measurement units.
must be greater than
Min
.
Min
◆
Press this softkey to enter the lower measurement limit in
the range -150 dBm to 230 dBm. The default value is
-90.00 dBm. Use the
change the value. To confirm your choice press the
Min
,
,
and
hardkeys to
appropriate measurement units.
Max
must be less than
.
■
■
Duty Cycle Off On
Press this softkey to toggle the duty cycle value on or off. The
default is “Off”. The duty cycle value is set using
Duty Cycle
.
Duty Cycle
of 0.001% to 100% can be entered. The default value is 1.000%.
Use the
value. To confirm your choice press
is automatically set to “On” when a value is entered using
Duty Cycle
,
,
and
hardkeys to change the
% Duty Cycle Off On
.
. Refer to “Measuring Pulsed Signals”, on
page 2-44 for further information.
ChA Filter ChB Filter
■
or
Press this softkey to access a menu which allows you to switch
the filter off and on, set the filter length, select automatic or
manual mode and switch step detection off and on.
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Menu Reference
Front Panel Menu Reference "System/Inputs" Menu
◆
Filter Off On
Press this softkey to toggle the filter value on or off. The
Length
default is “On”. The filter value is set using
◆
Press this softkey to toggle between the automatic (AUTO)
and manual (MAN) filter modes. In manual mode you enter
the number of measurements to be averaged. In automatic
mode the number of measurements averaged is based on the
measured power and uses a pre-defined look-up table. Refer
to “Setting Averaging”, on page 2-41 for further information.
Length
◆
Press this softkey to enter the filter length. The filter is used
to reduce noise, obtain the desired resolution and to reduce
jitter in the measurement results. Use the
and hardkeys to change the value.
Step Det Off On
,
,
◆
Press this softkey to switch step detection on or off. Step
detection reduces the settling time of the filter by
re-initialising the filter after a significant step (increase or
decrease) has been detected in the measured power. The
default is “On”.
Power Ref Off On
•
Press this softkey to switch the POWER REF output on or off. This
output is used as the signal source for calibration. This softkey is
commonly used for troubleshooting. The default is “Off”.
Note
During calibration the power meter automatically switches the
power reference oscillator on (if it is not already on), then after
calibration it switches it to the state it was in prior to the
calibration.
Error List
•
Press this softkey to display any power meter errors and access a
menu which allows you to clear and scroll through any power
meter errors. The errors are viewed in a first in first out (FIFO)
basis.
Clear Errors
■
Press this softkey to clear all the errors which are stored in
the power meter’s memory.
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Menu Reference
Front Panel Menu Reference "System/Inputs" Menu
Next
■
■
Press this softkey to move to the next error in the error queue.
The displayed error message is individually cleared each time
Next
is selected.
Done
Press this softkey to return to the “System/Inputs” menu.
Recorder Output
•
Press this key to access a menu which allows you to select either
Channel A or Channel B recorder output for setup
modification.Refer to “Recorder Outputs”, on page 2-65 for further
information.
Output Off On
■
Press this softkey to switch the rear panel Recorder Output on
or off. The Recorder Output produces a dc voltage that
corresponds to the selected input channel power level in
Watts.
Max Power
■
Press this softkey to enter the input power level that you want
to represent the 1 V maximum output voltage of the
dc
Recorder Output.
Min Power
■
Press this softkey to enter the input power level that you want
to represent the 0 V minimum output voltage of the
dc
Recorder Output.
Service
•
Press this softkey to access a menu which allows you to test and
Self Test
■
Press this softkey to access the power meter’s self test menu.
◆ Instrument Self Test
Press this softkey to run a series of tests on the power meter.
Refer to “Instrument Self Test”, on page 2-75 for further
information on the tests run.
Confidence Check
◆
Press this softkey to verify that the power meter makes an
accurate measurement of it’s 1 mW POWER REF output.
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Menu Reference
Front Panel Menu Reference "System/Inputs" Menu
Individual
◆
Press this softkey to access a menu which allows you to
select individual self tests to be run.
Memory
❖
Press this softkey to perform a ROM checksum verification
test, verify the memory and that the correct amount of
RAM is present.
Lithium Battery
❖
❖
Press this softkey to verify that the firmware checksum is
still resident in a battery-backed memory location.
Measure Assemblies
Press this softkey to run a self test on the measurement
assemblies. Refer to “Measurement Assemblies”, on
page 2-77 for further information.
Calibrator
❖
❖
Press this softkey to make internal voltage measurements
on the 50 MHz reference oscillator.
Keyboard
Press this softkey to verify that the keys are functioning
correctly. Once you enter this test you are prompted to
press all the keys and verify the correct descriptions are
displayed on the screen.
Fan
❖
❖
Press this softkey to run a test on the internal cooling fan.
Display
Press this softkey to access a menu of various front panel
display patterns.
Display Assy
❏
Press this softkey to make internal measurements on the
display.
Display RAM
❏
Press this softkey to perform a display RAM read/write
test.
Bitmap Displays
❏
Press this softkey to display test patterns. Instructions
More
appear on the screen detailing the use of
through the various bitmaps and
to cycle
Prev
to end the
displays.
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Menu Reference
Front Panel Menu Reference "System/Inputs" Menu
Serial Interface
❖
Press this softkey to access a menu which gives you a
selection of serial interface tests to perform.
UART Config
❏
Press this softkey to initiate a test which writes to the
scratch register and reads back. The test also sets the
baud rate, word length, stop bits and parity; then reads
back from the UART to check that the settings are
correct.
Local Loop Back
❏
❏
Press this softkey to initiate a UART local loop back
diagnostic with the transmitter (Tx) internally connected
to the receiver (Rx).
RS232 Loop Back
Press this softkey to initiate an RS232 loop back test on
the serial interface port. A pop up message appears
stating that a test connector must be in place. The test
connector must have the following pins jumpered: Tx (3)
and Rx (2), RTS (7) and CTS (8), DTR (4) and DSR (6).
This test will only run if the RS232 interface is currently
selected.
A softkey menu offers the following choices:
Run Test- performs the RS232 loop back test and
reports the results.
Cancel Test- quit test and return to previous menu.
RS422 Loop Back
❏
Press this softkey to initiate an RS422 loop back test on
the serial interface port. A pop up message appears
stating that a test connector must be in place. The test
connector must have the following pins jumpered: Tx- (4)
and Rx- (2), Tx+(3) and Rx+(6), RTS-(9) and CTS-(1),
RTS+(7) and RTS-(8).
This test will only run if the RS422 interface is currently
selected.
A softkey menu offers the following choices:
Run Test- performs the RS422 loop back test and
reports the results.
Cancel Test-quit test and return to previous menu.
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Menu Reference
Front Panel Menu Reference "System/Inputs" Menu
Display
■
Press this softkey to access a menu which allows you to set the
defaults for contrast and brightness.
◆
Press this softkey to increase the display contrast.
◆
Press this softkey to decrease the display contrast.
Set Contrast
◆
Press this softkey to set the default contrast to that currently
displayed. Note, this key changes the factory default setting.
Set Brightness
◆
Press this softkey to set the brightness. Note, this key
changes the factory default setting.
Version
■
Press this softkey to display: the model number; option
structure; serial number; firmware, bootrom and DSP
revisions.
Serial Diagnostic
■
Press this softkey to access a diagnostic menu for the serial
interface (RS232/RS422). This softkey is greyed out if HP-IB
has been selected as the remote control interface.
Tx Break
◆
Press this softkey to transmit a break sequence from the
serial port to the external receiver.
Status
◆
Press this softkey to produce a screen showing the state of
the UART line and modem status registers. If the Xon/Xoff
handshake is enabled, the screen also shows the state of Rx
and Tx.
Reset
◆
Press this softkey to reset and initialize the UART and to
flush both the receiver and transmitter buffers.
Interface Overview
◆
Press this softkey to produce a screen showing a summary of
the remote interface configuration.
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Menu Reference
Front Panel Menu Reference "System/Inputs" Menu
Battery
■
This softkey is only present on power meters fitted with the
battery option 001. It is greyed out when the battery is not
installed.
Press this softkey to produce a screen which shows:
- How much charge the battery is holding
- The approximate running time left under battery power.
- Either, “Using ac power” (if the battery is fully charged),
“Charging battery”, or “Using battery power” as
applicable.
This softkey also accesses the Battery menu which allows you
to set the display backlight to On, Off, or Timed mode. In
Timed mode, the backlight turns off 10 minutes after the last
key press. To turn the backlight on again, press any key. While
operating with ac power connected these keys are grayed out
and the backlight is permanently on. On instrument preset
the Backlight is set to “On”
Backlight On
◆
◆
◆
Press this softkey to turn the display backlight permanently
On.
Backlight Off
Press this softkey to set the display backlight to be Off while
the power meter is operating under battery power.
Backlight Timed
Press this softkey to select the Backlight Timed mode. When
the power meter is in this mode and is operating under
battery power, the display backlight turns off 10 minutes
after the last key press. To turn the backlight back on, press
any key.
Done
◆
Pressing this softkey returns the display to the previous
screen.
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Menu Reference
Front Panel Menu Reference "Zero/Cal" Menu
Cal
The softkey menu structured to this hardkey affects the channel setup.
page 2-8 for further information.
Zero A
•
Press this softkey to adjust channel A for a zero power reading
Calibrating the Power Meter”, on page 2-7 for further information.
Zero B
•
Press this softkey to adjust channel B’s internal circuitry for a
zero power reading with no power applied to the power sensor.
Zero Both
•
•
Press this softkey to adjust both channel A’s and channel B’s
internal circuitry for a zero power reading with no power supplied
to the power sensor. Refer to “Zeroing and Calibrating the Power
Meter”, on page 2-7 for further information.
Cal
Press this softkey to access a menu which allows you to calibrate
the power meter. Calibration sets the gain of the power meter
using a 50 MHz oscillator as a traceable power reference.
Cal A
■
Press this softkey to calibrate channel A with the connected
power sensor. The POWER REF output is used as the signal
source for calibration and is automatically switched on during
this procedure.
A Ref CF
■
Press this softkey to enter a reference calibration factor for
channel A. A value in the range of 1% to 150% can be entered.
The default value is obtained from the sensor calibration table
if one is selected, otherwise it is 100%. Use the
,
,
and hardkeys to change the value. To confirm your
%
choice press . This softkey cannot be selected when you are
using an HP E-series power sensor.
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Menu Reference
Front Panel Menu Reference "Zero/Cal" Menu
Cal B
■
Press this softkey to calibrate channel B with the connected
power sensor. The POWER REF output is used as the signal
source for calibration and is automatically switched on during
this procedure.
B Ref CF
■
Press this softkey to enter a reference calibration factor for
channel B. A value in the range of 1% to 150% can be entered.
The default value is obtained from the sensor calibration table
if one is selected, otherwise it is 100%. Use the
,
,
and hardkeys to change the value. To confirm your
%
choice press . This softkey cannot be selected when you are
using an HP E-series power sensor power sensor.
Power Ref Off On
•
Press this softkey to switch the POWER REF output on or off. This
output is used as the signal source for calibration. The default is
“Off”.
Note
During calibration the power meter automatically switches the
power reference oscillator on (if it is not already on), then after
calibration it switches it to the state it was in prior to the
calibration.
Must Cal Off On
•
Press this softkey to switch the Zero/Cal Lockout facility On or
Off. When Zero/Cal Lockout is On, the power meter is prevented
from making a measurement until the sensor connected has been
zeroed and calibrated. This softkey is coupled to the equivalent
softkey in the System Inputs menu.
TTL Inputs Off On
•
Press this softkey to disable/enable (Off/On) the ZERO and CAL
rear panel TTL inputs.
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Menu Reference
Front Panel Menu Reference Diagramatical Keys
Diagrammatical Hardkeys
Press this hardkey to:
•
assist in modifying alphanumeric data that is to be entered into
the power meter. This hardkey moves the position of the cursor to
the left on the currently selected parameter.
•
select fields for editing on the “Edit Table” screen.
Press this hardkey to:
•
assist in modifying alphanumeric data that is to be entered into
the power meter. This hardkey moves the position of the cursor to
the right on the currently selected parameter.
•
select fields for editing on the “Edit Table” screen.
Press this hardkey to:
•
decrement the alphanumeric digit on which the cursor is currently
positioned. That is, digits scroll 9 through 0, and characters
lowercase z through a, uppercase Z through A, then underscore.
•
•
•
select fields for editing on the “Edit Table” screen.
select a table in the “Sensor Cal Tables” screen.
select a file in the “Save” and “Recall” screens.
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Menu Reference
Front Panel Menu Reference Diagramatical Keys
Press this hardkey to:
•
increment the alphanumeric digit on which the cursor is currently
positioned. That is, digits scroll 0 through 9, and characters
lowercase a through z, uppercase A through Z, then underscore.
•
•
•
select fields for editing on the “Edit Table” screen.
select a table in the “Sensor Cal Tables” screen.
select a file in the “Save” and “Recall” screens.
Press this hardkey to select the upper or lower measurement window on
the power meter’s display. The window which is selected is highlighted by
dBm/W
a shadowed box. Any measurement setup you create using
,
Meas
Setup
Rel
and
is implemented in the selected window.
Offset
Press this hardkey to choose from a one or a two window display.
Press this hardkey to switch the power meter between on and standby.
When the power meter is switched to standby (that is, when this hardkey
is off but the power is connected to the instrument) the red LED is lit.
When the power meter is switched on the green LED is lit.
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Menu Reference
Front Panel Menu Reference Diagramatical Keys
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Error Messages
Introduction
Introduction
This chapter contains information about the power meter’s error
messages. It explains how to read the power meter’s error queue and lists
When there is a hardware related problem, for example, a power sensor
overload, the error message is displayed on the status line at the top of the
display. In addition, the errors are also written to the error queue. If there
are any errors in the error queue the front panel error annunciator is
displayed as shown in Figure 4-1.
Other errors can also be generated when the power meter is being
operated over the remote interface. These errors also display the error
annunciator and are written to the error queue.
Figure 4-1: Error Annunciator Position
Error annunciator
To read the error queue from the front panel press:
System
Inputs
More
Error List
Next
to scroll through
•
,
,
then use
each error message.
To read the error queue from the remote interface use:
the SYSTem:ERRor?command.
Error queue messages have the following format:
•
Error
Number
Device
Dependent Info
Error
Description
;
”
“
,
For example, -330, “Self-test Failed;Battery Fault”.
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Error Messages
Introduction
Errors are retrieved in a first in first out (FIFO) order. If more than 30
errors occur, the error queue overflows and the last error in the queue is
replaced with error -350, “Queue Overflow”. Any time the queue
overflows the most recent error is discarded.
Once the errors are read they are removed from the error queue. This
opens a position at the end of the queue for a new error message, if one is
subsequently detected. When all errors have been read from the queue,
further error queries return +0, “No errors”.
To delete all the errors in the queue from the front panel press:
System
Inputs
More
Error List
Clear Errors
•
,
,
then
.
To delete all the errors in the queue remotely use:
the *CLS(clear status) command.
•
The error queue is also cleared when the instrument power has been
switched off.
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Error Messages
Error Messages
Error Messages
-101
Invalid character
An invalid character was found in the command string. You may have
inserted a character such as #, $, or % in the command header or within
a parameter.
For example, LIM:LOW O#.
-102
-103
Syntax error
Invalid syntax was found in the command string.
For example, LIM:CLE:AUTO, 1or LIM:CLE: AUTO 1.
Invalid separator
An invalid separator was found in the command string. You may have
used a comma instead of a colon, semicolon, or blank space; or you may
have used a blank space instead of a comma.
For example, OUTP:ROSC,1.
-105
-108
GET not allowed
A Group Execute Trigger (GET) is not allowed within a command string.
Parameter not allowed
More parameters were received than expected for the command. You
may have entered an extra parameter, or added a parameter to a
command that does not accept a parameter.
For example, CAL 10.
-109
-112
Missing parameter
Fewer parameters were received than expected for the command. You
omitted one or more parameters that are required for this command.
For example, AVER:COUN.
Program mnemonic too long
A command header was received which contained more than the
maximum 12 characters allowed.
For example, SENSeAVERageCOUNt 8.
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Error Messages
Error Messages
-113
Undefined header
A command was received that is not valid for this power meter. You may
have misspelled the command, it may not be a valid command or you
may have the wrong interface selected. If you are using the short form
of the command, remember that it may contain up to four letters.
For example, TRIG:SOUR IMM.
-121
-123
Invalid character in number
An invalid character was found in the number specified for a parameter
value.
For example, SENS:AVER:COUN 128#H.
Exponent too large
A numeric parameter was found whose exponent was larger than
32,000.
For example, SENS:COUN 1E34000.
-124
-128
Too many digits
A numeric parameter was found whose mantissa contained more than
255 digits, excluding leading zeros.
Numeric data not allowed
A numeric value was received within a command which does not accept
a numeric value.
For example, MEM:CLE 24.
-131
Invalid suffix
A suffix was incorrectly specified for a numeric parameter. You may
have misspelled the suffix.
For example, SENS:FREQ 200KZ.
-134
-138
Suffix too long
A suffix used contained more than 12 characters.
For example, SENS:FREQ 2MHZZZZZZZZZZZ.
Suffix not allowed
A suffix was received following a numeric parameter which does not
accept a suffix.
For example, INIT:CONT 0Hz.
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Error Messages
Error Messages
-148
Character data not allowed
A discrete parameter was received but a character string or a numeric
parameter was expected. Check the list of parameters to verify that you
have used a valid parameter type.
For example, MEM:CLE CUSTOM_1.
-151
-158
Invalid string data
An invalid string was received. Check to see if you have enclosed the
character string in single or double quotes.
For example, MEM:CLE “CUSTOM_1.
String data not allowed
A character string was received but is not allowed for the command.
Check the list of parameters to verify that you have used a valid
parameter type.
For example, LIM:STAT ‘ON’.
-161
-168
-178
-211
-213
Invalid block data
A block data element was expected but was invalid for some reason. For
example, *DDT #15FET. The 5 in the string indicates that 5 characters
should follow, whereas in this example there are only 3.
Block data not allowed
A legal block data element was encountered but not allowed by the
power meter at this point.
For example SYST:LANG #15FETC?.
Expression data not allowed
A legal expression data was encountered but not allowed by the power
meter at this point.
For example SYST:LANG (5+2).
Trigger ignored
Indicates that <GET>or *TRG, or TRIG:IMMwas received and
recognized by the device but was ignored because the power meter was
not in the wait for trigger state.
Init ignored
Indicates that a request for a measurement initiation was ignored as
the power meter was already initiated.
For example, INIT:CONT ON
INIT.
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Error Messages
Error Messages
-214
-220
-221
Trigger deadlock
TRIG:SOURwas set to HOLDor BUSand a READ?or MEASure?was
attempted, expecting TRIG:SOURto be set to IMMediate.
Parameter error;Frequency list must be in ascending order.
Indicates that the frequencies entered using the
MEMory:TABLe:FREQuencycommand are not in ascending order.
Settings conflict
This command occurs under a variety of conflicting conditions. The
following list gives a few examples of where this error may occur:
•If the READ?parameters do not match the current settings.
•If you are in fast mode and attempting to switch on for example,
averaging, duty cycle or limits.
•Trying to clear a sensor calibration table when none is selected.
-221
-222
Settings conflict;DTR/DSR not available on RS422
DTR/DSR is only available on the RS232 interface.
Data out of range
A numeric parameter value is outside the valid range for the command.
For example, SENS:FREQ 2KHZ.
-224
-226
-230
Illegal parameter value
A discrete parameter was received which was not a valid choice for the
command. You may have used an invalid parameter choice.
For example, TRIG:SOUR EXT.
Lists not same length
This occurs when SENSe:CORRection:CSET[1]|CSET2:STATeis set
to ONand the frequency and calibration/offset lists do not correspond in
length.
Data corrupt or stale
This occurs when a FETC?is attempted and either a reset has been
received or the power meter state has changed such that the current
measurement is invalidated (for example, a change of frequency setting
or triggering conditions).
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Error Messages
Error Messages
-230
-230
-230
-230
-230
-230
-231
Data corrupt or stale;Please zero and calibrate Channel A
When CAL[1|2]:RCALis set to ONand the sensor currently connected
to channel A has not been zeroed and calibrated, then any command
which would normally return a measurement result (for example
FETC?, READ?, or MEAS?) will generate this error message.
Data corrupt or stale;Please zero and calibrate Channel B
When CAL[1|2]:RCALis set to ONand the sensor currently connected
to channel B has not been zeroed and calibrated, then any command
which would normally return a measurement result (for example
FETC?, READ?, or MEAS?) will generate this error message.
Data corrupt or stale;Please zero Channel A
When CAL[1|2]:RCALis set to ONand the sensor currently connected
to channel A has not been zeroed, then any command which would
normally return a measurement result (for example FETC?, READ?, or
MEAS?) will generate this error message.
Data corrupt or stale;Please zero Channel B
When CAL[1|2]:RCALis set to ONand the sensor currently connected
to channel B has not been zeroed, then any command which would
normally return a measurement result (for example FETC?, READ?, or
MEAS?) will generate this error message
Data corrupt or stale;Please calibrate Channel A
When CAL[1|2]:RCALis set to ONand the sensor currently connected
to channel B has not been calibrated, then any command which would
normally return a measurement result (for example FETC?, READ?, or
MEAS?) will generate this error message
Data corrupt or stale;Please calibrate Channel B
When CAL[1|2]:RCALis set to ONand the sensor currently connected
to channel B has not been calibrated, then any command which would
normally return a measurement result (for example FETC?, READ?, or
MEAS?) will generate this error message
Data questionable;CAL ERROR ChA
Power meter calibration failed on channel A. The most likely cause is
attempting to calibrate without applying a 1 mW power to the power
sensor.
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Error Messages
Error Messages
-231
Data questionable;CAL ERROR ChB
Power meter calibration failed on channel B. The most likely cause is
attempting to calibrate without applying a 1 mW power to the power
sensor.
-231
-231
-231
Data questionable;Input Overload ChA
The power input to Channel A exceeds the power sensor’s maximum
range.
Data questionable;Input Overload ChB
The power input to Channel B exceeds the power sensor’s maximum
range.
Data questionable;Lower window log error
This indicates that a difference measurement in the lower window has
given a negative result when the units of measurement were
logarithmic.
-231
-231
-231
-241
-310
Data questionable;Upper window log error
This indicates that a difference measurement in the upper window has
given a negative result when the units of measurement were
logarithmic.
Data questionable;ZERO ERROR ChA
Power meter zeroing failed on channel A. The most likely cause is
attempting to zero when some power signal is being applied to the
power sensor.
Data questionable;ZERO ERROR ChB
Power meter zeroing failed on channel B. The most likely cause is
attempting to zero when some power signal is being applied to the
power sensor.
Hardware missing
The power meter is unable to execute the command because either no
power sensor is connected or it expects an HP E-series power sensor
and one is not connected.
System error;Ch A Dty Cyc may impair accuracy with ECP
sensor
This indicates that the sensor connected to channel A is for use with
CW signals only.
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Error Messages
Error Messages
-310
-310
-310
-310
-310
sensor
This indicates that the sensor connected to channel B is for use with
CW signals only.
System error;Detector EEPROM Read Failed - critical data not
found or unreadable
This indicates a failure with your HP E-series power sensor. Refer to
your power sensor manual for details on returning it for repair.
System error;Detector EEPROM Read Completed OK but
optional data block(s) not found or unreadable
This indicates a failure with your HP E-series power sensor. Refer to
your power sensor manual for details on returning it for repair.
System error;Detector EEPROM Read Failed - unknown
EEPROM table format
This indicates a failure with your HP E-series power sensor. Refer to
your power sensor manual for details on returning it for repair.
System error;Detector EEPROM < > data not found or
unreadable
Where < > refers to the sensor data block covered, for example,
Linearity, Temp - Comp (temperature compensation).
This indicates a failure with your HP E-series power sensor. Refer to
your power sensor manual for details on returning it for repair.
-310
-310
The power meter is connected to an ac power source, the battery is not
fully charged and it is not charging.
System error;Sensors connected to both front and rear inputs.
You cannot connect two power sensors to the one channel input. In this
instance the power meter detects power sensors connected to both it’s
front and rear channel inputs.
-321
Out of memory
The power meter required more memory than was available to run an
internal operation.
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Error Messages
-330
Self-test Failed;
The -330, “Self-test Failed” errors indicate that you have a problem
with your power meter. Refer to “Contacting Hewlett-Packard”, on
page 2-81 for details of what to do with your faulty power meter.
-330
-330
-330
-330
-330
-330
-330
-330
-330
-330
Self-test Failed;Measurement Channel A Fault
Refer to “Measurement Assemblies”, on page 2-77 if you require a
description of the Measurement Assembly test.
Self-test Failed;Measurement Channel B Fault
Refer to “Measurement Assemblies”, on page 2-77 if you require a
description of the Measurement Assembly test.
Self-test Failed;Option 001 Battery requires replacement
The option 001 battery is not charging to a satisfactory level and should
be replaced.
Self-test Failed;RAM Battery Fault
Refer to “RAM Battery”, on page 2-77 if you require a description of the
battery test.
Self-test Failed;Calibrator Fault
Refer to “Calibrator”, on page 2-78 if you require a description of the
calibrator test.
Self-test Failed;ROM Check Failed
Refer to “ROM Checksum”, on page 2-77 if you require a description of
the ROM Checksum test.
Self-test Failed;RAM Check Failed
Refer to “RAM”, on page 2-77 if you require a description of the RAM
test.
Self-test Failed;Display Assy. Fault
Refer to “Display”, on page 2-78 if you require a description of the
Display test.
Self-test Failed;Confidence Check Fault ChA
Refer to “Confidence Check”, on page 2-75 if you require a description of
this test.
Self-test Failed;Confidence Check Fault ChB
Refer to “Confidence Check”, on page 2-75 if you require a description of
this test.
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Error Messages
Error Messages
-330
-350
-361
-362
-363
-410
Self-test Failed;Serial Interface Fault
Refer to “Serial Interface”, on page 2-77 if you require a description of
this test.
Queue overflow
The error queue is full and another error has occurred which could not
be recorded.
Parity error in program
The serial port receiver has detected a parity error and consequently,
data integrity cannot be guaranteed.
Framing error in program
The serial port receiver has detected a framing error and consequently,
data integrity cannot be guaranteed.
Input buffer overrun
The serial port receiver has been overrun and consequently, data has
been lost.
Query INTERRUPTED
A command was received which sends data to the output buffer, but the
output buffer contained data from a previous command (the previous
data is not overwritten). The output buffer is cleared when power has
been off, or after *RST(reset) command has been executed.
-420
Query UNTERMINATED
The power meter was addressed to talk (that is, to send data over the
interface) but a command has not been received which sends data to the
output buffer. For example you may have executed a CONFigure
command (which does not generate data) and then attempted to read
data from the remote interface.
-430
-440
Query DEADLOCKED
A command was received which generates too much data to fit in the
output buffer and the input buffer is also full. Command execution
continues but data is lost.
Query UNTERMINATED after indefinite response
The *IDN?command must be the last query command within a
command string.
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Specifications
Introduction
Introduction
This chapter details the power meter’s specifications and supplemental
characteristics.
Specifications describe the warranted performance and apply after a 30
minute warm-up. These specifications are valid over the power meter’s
operating and environmental range unless otherwise stated and after
performing a zero and calibration.
Supplemental characteristics, which are shown in italics, are intended to
provide information useful in applying the power meter by giving typical,
but nonwarranted performance parameters. These characteristics are
shown in italics or denoted as “typical”, “nominal” or “approximate”.
For information on measurement uncertainty calculations, refer to
HP Application Note 64-1A, “Fundamentals of RF and Microwave Power
Measurements”, Literature Number 5965-6630.
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Specifications
Power Meter Specifications
Power Meter Specifications
Meter
Frequency Range
100 kHz to 110 GHz, power sensor dependent
Power Range
-70 dBm to +44 dBm (100 pW to 25 W), power sensor dependent
Power Sensors
Compatible with all HP 8480 series power sensors and HP E-series power
sensors.
Single Sensor Dynamic Range
90 dB maximum (HP E-series power sensors)
50 dB maximum (HP 8480 series power sensors)
Display Units
Absolute: Watts or dBm
Relative: Percent or dB
Display Resolution
Selectable resolution of:
1.0, 0.1, 0.01 and 0.001 dB in logarithmic mode, or
1, 2, 3 and 4 significant digits in linear mode
Default Resolution
0.01 dB in logarithmic mode
3 digits in linear mode
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Specifications
Power Meter Specifications
Accuracy
Instrumentation
Absolute: ±0.02 dB (Logarithmic) or ±0.5% (Linear). (Refer to the power
sensor linearity specification in your power sensor manual to assess
Relative: ±0.04 dB (Logarithmic) or ±1.0% (Linear). (Refer to the power
sensor linearity specification in your power sensor manual to assess
overall system accuracy.)
Zero Set (digital settability of zero): Power sensor dependent (refer to
Table 5-1). For HP E-series power sensors, this specification applies when
zeroing is performed with the sensor input disconnected from the POWER
REF.
Table 5-1: Zero Set Specifications
Power Sensor
Zero Set
HP 8481A
HP 8481B
HP 8481D
HP 8481H
HP 8482A
HP 8482B
HP 8482H
HP 8483A
HP 8485A
HP 8485D
HP R8486A
HP R8486D
HP Q8486A
HP Q8486D
HP V8486A
HP W8486A
HP 8487A
HP 8487D
HP E4412A
HP E4413A
±50 nW
±50 µW
±20 pW
±5 µW
±50 nW
±50 µW
±5 µW
±50 nW
±50 nW
±20 pW
±50 nW
±30 pW
±50 nW
±30 pW
±200 nW
±200 nW
±50 nW
±20 pW
±50 pW
±50 pW
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Specifications
Power Meter Specifications
Power Reference
Power Output
1.00 mW (0.0 dBm). Factory set to ±0.7% traceable to the US National
Institute of Standards and Technology.
Accuracy
±1.2% worst case (±0.9% rss) for one year.
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Specifications
Power Meter Supplemental Characteristics
Power Meter Supplemental Characteristics
Power Reference
Frequency
50 MHz nominal
SWR
1.05 maximum
Connector
Type N (f), 50 Ω
Measurement Speed
Over the HP-IB, three measurement speed modes are available as shown,
along with the typical maximum measurement speed for each mode:
•
•
•
Normal: 20 readings/second
x2: 40 readings/second
Fast: 200 readings/second, for HP E-series power sensors only
Maximum measurement speed is obtained using binary output in free run
trigger mode.
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Specifications
Power Meter Supplemental Characteristics
Zero Drift of Sensors
Power sensor dependent (refer to Table 5-3).
Measurement Noise
Power sensor dependent (refer to Table 5-2 and Table 5-3).
Averaging effects on measurement noise. Averaging over 1 to 1024
readings is available for reducing noise. Table 5-3 provides the
measurement noise for a particular power sensor with the number of
averages set to 16 for normal mode and 32 for x2 mode. Use the “Noise
Multiplier” for the appropriate mode (normal or x2) and number of
averages to determine the total measurement noise value.
For example, for an HP 8481D power sensor in normal mode with the
number of averages set to 4, the measurement noise is equal to:
(<45 pW x 2.75) = <124 pW
Table 5-2: Noise Multiplier
1
2
4
8
16
1.0
32
64
128
256
512
1024
0.17
0.2
Number of
Averages
5.5
6.5
3.89 2.75 1.94
0.85 0.61 0.49 0.34 0.24
Noise Multiplier
(Normal Mode)
4.6
3.25
2.3
1.63
1.0
0.72 0.57 0.41 0.29
Noise Multiplier
(x2 mode)
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Specifications
Power Meter Supplemental Characteristics
Table 5-3: Power Sensor Specifications
1
2
Power Sensor
Zero Drift
Measurement Noise
HP 8481A
HP 8481B
<±10 nW
<±10 µW
<±4 pW
<110 nW
<110 µW
<45 pW
<10 µW
<110 nW
<110 µW
<10 µW
<110 nW
<110 nW
<45 pW
<110 nW
<65 pW
<110 nW
<65 pW
<450 nW
<450 nW
<110 nW
<45 pW
<70 pW
<70 pW
HP 8481D
HP 8481H
HP 8482A
<±1 µW
<±10 nW
<±10 µW
<±1 µW
HP 8482B
HP 8482H
HP 8483A
<±10 nW
<±10 nW
<±4 pW
HP 8485A
HP 8485D
HP R8486A
HP R8486D
HP Q8486A
HP Q8486D
HP V8486A
HP W8486A
HP 8487A
<±10 nW
<±6 pW
<±10 nW
<±6 pW
<±40 nW
<±40 nW
<±10 nW
<±4 pW
HP 8487D
HP ECP-E18A
HP ECP-E26A
<± 15 pW
<± 15 pW
1. Within 1 hour after zero set, at a constant temperature, after a 24
hour warm-up of the power meter.
2. The number of averages at 16 (for normal mode) and 32 (for x2 mode),
at a constant temperature, measured over a 1 minute interval and 2
standard deviations. For HP E-series power sensors the measurement
noise is measured within the low range. Refer to the relevant power
sensor manual for further information.
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Specifications
Power Meter Supplemental Characteristics
Settling Time
0 to 99% settled readings over the HP-IB.
For HP 8480 series power sensors
Manual filter, 10 dB decreasing power step:
Table 5-4: Settling Time
1
2
4
8
16
32
1.9
1.1
64
3.4
1.9
128
6.6
3.5
256
13
512
27
1024
57
Number of
Averages
0.15
0.2
0.3
0.5
1.1
Settling Time (s)
(Normal Mode)
0.15 0.18 0.22 0.35 0.55
6.9
14.5
33
Response Time (s)
(x2 mode)
Auto filter, default resolution, 10 dB decreasing power step,
normal and x2 speed modes:
Normal Mode
Maximum dBm
x2 Mode
Maximum dBm
150 ms
150 ms
20 dB
20 dB
Typical
Settling
Times
Typical
Settling
Times
Power
Power
Sensor
Dynamic
Range
Sensor
Dynamic
Range
200 ms
500 ms
6.6 s
180 ms
350 ms
3.5 s
10 dB
10 dB
10 dB
10 dB
10 dB
10 dB
Minimum dBm
Minimum dBm
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Specifications
Power Meter Supplemental Characteristics
For HP E-series power sensors
In FAST mode, within the range -50 dBm to +17 dBm, for a 10 dB
1.
decreasing power step, the settling time is 20 ms
1
When a decreasing power step crosses the power sensor’s auto-range switch
point, add 25 ms. Refer to the relevant power sensor manual for further
information.
For HP E-series power sensors in normal and x2 speed modes, manual
filter, 10 dB decreasing power step:
Table 5-5: Settling Time
1
2
4
8
16
32
1.8
1
64
3.3
1.8
128
6.5
3.4
256
13
512
27
1024
57
Number of
Averages
0.07 0.12 0.21
0.4
1
Settling Time (s)
(Normal Mode)
0.04 0.07 0.12 0.21
0.4
6.8
14.2
32
Response Time (s)
(x2 mode)
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Specifications
Power Meter Supplemental Characteristics
Auto filter, default resolution, 10 dB decreasing power step,
normal and x2 speed modes:
Normal Mode
x2 Mode
Maximum dBm
Maximum dBm
70 ms
40 ms
60 dB
Power
60 dB
Power
Typical
Settling
Times
Typical
Settling
Times
Sensor
Dynamic
Range
Sensor
Dynamic
Range
120 ms
400 ms
6.5 s
70 ms
210 ms
3.4 s
10 dB
10 dB
10 dB
10 dB
10 dB
10 dB
Minimum dBm
Minimum dBm
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Specifications
Power Meter Supplemental Characteristics
Power Sensor Specifications
Definitions
Zero Set
In any power measurement, the power meter must initially be set to zero
with no power applied to the power sensor. Zero setting is accomplished
within the power meter by digitally correcting for residual offsets.
Zero Drift
This parameter is also called long term stability and is the change in the
power meter indication over a long time (usually one hour) for a constant
input power at a constant temperature, after a defined warm-up interval.
Measurement Noise
This parameter is also known as short term stability and is specified as
the change in the power meter indication over a short time interval
(usually one minute) for a constant input power at a constant
temperature.
5-12
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Specifications
Battery Option 001 Operational Characteristics
Battery Option 001 Operational Characteristics
The following information describes characteristic performance based at a
temperature of 25 °C unless otherwise noted. Characteristics describe
product performance that is useful in the application of the product, but is
not covered by the product warranty.
Typical Operating Time
Up to 2 hours with LED backlight on; up to 3 hours with LED backlight
off.
Charge Time
< 2 hours to charge fully from an empty state: 50 minutes charging
enables 1 hour of operation with LED backlight ON; 35 minutes charging
enables 1 hour of operation with the LED backlight OFF. Power meter is
operational whilst charging.
Service Life
To 70% of initial capacity at 25 °C: approximately 450 charge/discharge
cycles.
Chemistry
Nickel Metal Hydride.
Weight
1 kg.
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Specifications
General Characteristics
General Characteristics
Rear Panel Connectors
Recorder Outputs
Analog 0-1 Volt, 1 kΩ output impedance, BNC connector.
Recorder outputs are dedicated to Channel A and Channel B.
HP-IB
Allows communication with an external HP-IB controller.
RS-232/422
Allows communication with an external RS-232 or RS422 controller. Male
Plug 9 position D-subminiature connector.
Remote Input/Output
A TTL logic level is output when the measurement exceeds a predetermined
limit. TTL inputs are provided to initiate zero and calibration cycles.
RJ-45 series shielded modular jack assembly.
TTL output: high = 4.8 V max; low = 0.2 V max
TTL input: high = 3.5 V min, 5 V max; low = 1 V max, -0.3 V min
Ground
Binding post, accepts 4 mm plug or bare-wire connection.
Line Power
•
•
•
Input Voltage Range: 85 to 264 Vac, automatic selection
Input Frequency Range: 50 to 440 Hz
Power Requirement: approximately 50 VA (14 Watts)
5-14
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Specifications
Environmental Characteristics
Environmental Characteristics
General Conditions
Complies with the requirements of the EMC Directive 89/336/EEC. This
includes Generic Immunity Standard EN 50082-1: 1992 and Radiated
Interference Standard EN 55011:1991/CISPR11:1990, Group 1 - Class A.
Operating Environment
Temperature
0ºC to 55ºC
Maximum Humidity
95% at 40ºC (non-condensing)
Minimum Humidity
15% at 40ºC (non-condensing)
Maximum Altitude
3,000 meters (9,840 feet)
Storage Conditions
Storage Temperature
-20ºC to +70ºC
Non-Operating Maximum Humidity
90% at 65ºC (non-condensing)
Non-Operating Maximum Altitude
15,240 meters (50,000 feet)
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Specifications
General
General
Dimensions
The following dimensions exclude front and rear panel protrusions:
212.6 mm W x 88.5 mm H x 348.3 mm D (8.5 in x 3.5 in x 13.7 in)
Weight
Net
4.1 Kg (9.0 lb)
5.1 Kg (11.2 lb) with option 001
Shipping
8.0 Kg (17.6 lb)
9.0 Kg (19.8 lb) with option 001
Safety
Conforms to the following Product Specifications:
•
EN61010-1: 1993/IEC 1010-1:1990+A1/CSA C22.2 No.
1010-1:1993
•
•
EN60825-1: 1994/IEC 825-1: 1993 Class 1
Low Voltage Directive 72/23/EEC
Remote Programming
Interface
HP-IB interface operates to IEEE 488.2. RS-232 and RS-422 interfaces
are supplied as standard.
Command Language
SCPI standard interface commands.HP 438A code compatible.
5-16
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Specifications
General
5-18
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Index
operational characteristics 5-13
service life 5-13
typical operating time 5-13
weight 5-13
Symbols
"%" key description 3-12
A
battery self-test 2-70
absolute accuracy, specification 5-4
accessories xi
address
of Hewlett-Packard 2-77
of HP-IB 2-53
alphanumeric data
language selection 2-58
setting of address 2-53
entry window 1-15
modify 3-36
C
altitude characteristic 5-15
analog display 2-49
"Anlg Mtr Scaling" key description 3-15
arrow keys 1-6, 3-36
averaging 2-38
cabinet installation 1-19
cables xi
calibrate 2-8
step detection 2-39
HP E-series sensors 2-8
using TTL inputs 2-12
calibration data 2-15
calibration factors 2-15
calibration table 2-19
editing 2-21
B
basic errors, 2-75
"Battery" key description 3-32
battery operation 2-3
backlight 2-4
selection of 2-19
calibrator self-test 2-71
carry case 2-3
carry handle, adjusting 1-18
caution v
"Change" key description 3-24, 3-25
channel connectors (option 002 or 003) 1-16
channel limits 2-43
battery status 2-3
carry case 2-3
charging times 2-4
general information 2-3
removal/replacement 2-5
running time 2-3
battery option 001 5-13
charge time 5-13
chemistry 5-13
channel offset 2-36
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characteristics 5-2
"Clear Errors" key description 3-28
command language 5-16
"Command Set" key description 3-21
common errors, 2-75
digital display 2-49
display 1-4
compensation 2-36
confidence check 2-68
analog or digital 2-49
offset 2-36
connector, Recorder Output 5-14
connectors
one or two windows 1-7
resolution, specification 5-3
self-test 2-71
units, specification 5-3
Channel A (option 002 or 003) 1-16
channel inputs 1-5
ground 5-14
POWER REF 1-16
POWER REF output 1-6
remote input output 5-14
RS232 5-14
duty cycle 1-8
RS232/RS422 2-54
RS422 5-14
E
copyright ii
correction data 2-15
environmental characteristics 5-15
error window 1-14
cursor positioning 3-36
D
danger v
data table
editing 2-21
selection of 2-19
"dB" key description 3-12
dB, selecting units 2-32
"dBm" key description 3-12
dBm, selecting units 2-32
"dBm/W"
failures 2-47
fail indicator 1-8
fail limits 2-43
"Fan" key description 3-30
field selection 3-36
filter 2-38
"Filter" key description 3-27
"Filter Off On" key description 3-27
framing error in program, error message 4-11
key description 3-12
menu map 3-3
declaration of conformity viii
decrement digits 3-36
Index-2
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"Freq" key description 3-13
frequency dependent offset tables
editing 2-29
self-test 2-68
selection of 2-27
using 2-27
specification 5-3
serial numbers 1-17, 2-75
"Instrument Self Test" key description 3-29
language selection 2-58
setting of address 2-53
"Interface Overview" key description 3-32
frequency, characteristic of power reference 5-6
"Frequency/Cal Fac"
menu map 3-4
block data, error message 4-6
character in number, error message 4-5
character, error message 4-4
suffix, error message 4-5
fuse 1-16
replacing 2-73
G
gain 2-36
getting started 1-1
ground connector 1-17
keyboard self-test 2-71
keys 3-3
H
handle, adjusting 1-18
Hewlett-Packard
contacting 2-74
offices 2-77
"HP 437B" key description 3-21
HP-IB 1-16
LED 3-37
limit failures 2-47
compatibility 5-16
connector characteristic 5-14
language selection 2-58
setting of address 2-53
"HP-IB" key description 3-21, 3-22
humidity characteristic 5-15
"Limits" (window) key description 3-16
"Limits" key description 3-26
3-17
I
"Linearity ATyp Dtyp" key description 3-26
"Lithium Battery" key description 3-30
"Local Loop Back" key description 3-31
logarithmic units 2-32
illegal parameter value, error message 4-7
increment digits 3-37
"Individual" key description 3-29
init ignored, error message 4-6
input buffer overrun, error message 4-11
"Input Settings" key description 3-26
"Insert Char" key description 3-20
loss 2-36
lower limit 2-43
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offsets 2-36
M
operating voltage 1-16
options xi
overlooked errors, 2-75
overview xii
maintenance 2-73
maps 3-3
"Max" key description 3-15, 3-16, 3-27
"Max Power" key description 3-29
"Meas Setup"
key description 3-15
menu map 3-5
measurement
limits 2-43
noise characteristic 5-7
noise definition 5-12
pulsed signals 2-41
relative 2-34
speed 5-6
indicator 1-8
units 2-32
limits 2-43
with HP E-series sensors 2-15
memory 5-17
sensor cables xi
sensors 5-3
socket 1-16
power characteristic 5-14
save and recall 2-61
"Memory" key description 3-29
menu maps 3-3
key description 3-37
menu title 1-8
self-test 2-66
"Meter Dgtl Anlg" key description 3-15
"Min" key description 3-15, 3-16, 3-27
"Min Power" key description 3-29
"More" key description 3-18
power output, specification 5-5
power range, specification 5-3
POWER REF output 1-6
characteristics 5-6
specification 5-5
prepare for use 1-2
preset conditions 2-64
N
negative readings 2-32
"Next" key description 3-28
noise, characteristic 5-7
non-volatile memory 5-17
numeric data not allowed, error message 4-5
numeric entry window 1-15
problems 2-74, 4-2
program mnemonic too long, error message 4-4
programming language 2-58
pulsed signals, measuring 2-41
O
Q
"Offset" key description 3-19, 3-26
"Offset Off On" key description 3-19, 3-26
query deadlocked, error message 4-11
Index-4
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query interrupted, error message 4-11
ror message 4-11
RS422 1-16
connector 2-54
connector characteristics 5-14
setting parameters 2-55
R
rack mount 1-19
RAM self-test 2-70
"Range" key description 3-26
range,setting of 2-52
rear panel 1-16
safety v, 5-16
save 2-61
recall 2-61
characteristic 5-14
"Recorder Output" key description 3-29
"Ref CF" key description 3-34
reference 2-8
key description 3-20
menu map 3-6
screen 1-4
setting of 2-34
layout 1-7
regulatory information viii
"Rel" key description 3-19
"Rel/Offset"
key description 3-19
menu map 3-6
relative accuracy, specification 5-4
relative measurements 2-34
remote interface 2-53, 5-16
connector 1-16
a field 3-36
a window 3-37
self-test 2-66
bitmap display 2-72
calibrator 2-71
display 2-71
fan 2-70
language selection 2-58
setting of address 2-53
remote interface overview 2-56
resolution of display 2-35
returning for service 2-80
Rmt I/O 1-17, 5-14
HP-IB testing 2-69
keyboard 2-71
lithium battery (RAM) 2-70
option 001 battery 2-71
RAM 2-70
ROM checksum 2-70
serial interface 2-70
self-test failed, error messages 4-10
sensor cables xi
ROM checksum self-test 2-70
RS232 1-16
connector 2-54
connector characteristics 5-14
setting parameters 2-55
"RS232" key description 3-21
"RS232 Loop Back" key description 3-31
"Sensor Cal Tables" key description 3-24
sensor calibration table
editing 2-21
selection of 2-19
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TTL inputs 2-12
TTL outputs 2-44
turn on 1-3
using 2-19
"Serial" key description 3-22
serial label 1-17, 2-75
serial number identifiers, 2-75
service
packaging for 2-80
returning for 2-80
"Service" key description 3-29
service offices 2-77
settling time, characteristic 5-9
size of instrument 5-16
units 2-32
upper limit 2-43
user environment vii
softkeys 1-5, 1-8, 3-3
sound emission viii
specifications 5-2
"Status" key description 3-32
status reporting line 1-7
"Step Det Off On" key description 3-28
step detection 2-39
"W" key description 3-12
wait window 1-14
warm-up 5-2
"Stop Bits" key description 3-22
store 2-61
warning v
suffix not allowed, error message 4-5
suffix too long, error message 4-5
switch on 1-3
symbols 1-14
syntax error, error message 4-4
system error, error messages 4-9
"System/Inputs"
warning window 1-14
warranty iii
watt, selecting units 2-32
weight of instrument 5-16
window limits 2-44
TTL outputs 2-44
key description 3-21
menu map 3-7
zero 2-7
T
drift definition 5-12
drift of sensors, characteristic 5-7
using TTL inputs 2-12
"Zero" key description 3-34
zero set
"Table Off On" key description 3-25
"Tables" key description 3-24
telephone numbers of Hewlett-Packard 2-77
temperature characteristic 5-15
test. See self-test
definition 5-12
specification 5-4
title 1-8
too many digits, error message 4-5
Index-6
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"Zero/Cal"
key description 3-34
menu map 3-11
zero/cal lockout 2-7
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Index-8
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