HP Hewlett Packard Cell Phone Accessories 8935 User Manual

HP 8935 CDMA Cellu la r /P CS Ba se Sta t ion

Test Set

AMP S Ba se Sta tion Test s

Ap p lica tion Gu id e

F ir m w a r e Ver sion : A.01.00 a n d a b ove

HP Part Number: E6380-90017

R e vision A

P r in t ed in U.S.A

Novem b er 1997

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Ma n u fa ct u r er ’s Decla r a tion

This statement is provided to comply with the requirements of the

German Sound Emission Directive, from 18 J anuary 1991.

This product has a sound pressure emission (at the operator position)

< 70 dB(A).

Sound Pressure Lp < 70 dB(A)

At Operator Position

Normal Operation

According to ISO 7779:1988/EN 27779:1991 (Type Test).

H er st eller b esch ein igu n g

Diese Information steht im Zusammenhang mit den Anforderungen der

Maschinenlärminformationsverordnung vom 18 J anuary 1991.

Schalldruckpegel Lp < 70 dB(A).

Am Arbeitsplatz

Normaler Betrieb.

Nach ISO 7779:1988/EN 27779:1991 (Typprüfung).

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Sa fety

GENERAL

This product and related documentation must be reviewed for

familiarization with safety markings and instructions before operation.

This product has been designed and tested in accordance with IEC

Publication 1010, "Safety Requirements for Electronic Measuring

Apparatus," and has been supplied in a safe condition. This instruction

documentation contains information and warnings which must be

followed by the user to ensure safe operation and to maintain the

product in a safe condition.

SAFETY SYMBOLS

Indicates instrument damage can occur if indicated operating limits are

exceeded. Refer to the instructions in this guide.

Indicates hazardous voltages.

Indicates earth (ground) terminal

WARNING

CAUTION

A WAR NING n ote d en otes a h a za r d . It ca lls a t ten tion t o a

p r oce d u r e , p r a ctice, or th e lik e , w h ich , if n ot cor r e ct ly

p e r for m ed or a d h e r e d t o, cou ld r esu lt in p er son a l in ju r y. Do n ot

p r oce ed be yon d a WAR NING sign u n til t h e in d ica te d con d it ion s

a r e fu lly u n d er stood a n d m et .

A CAUTION note denotes a hazard. It calls attention to an operation

procedure, practice, or the like, which, if not correctly performed or

adhered to, could result in damage to or destruction of part or all of the

product. Do not proceed beyond an CAUTION note until the indicated

conditions are fully understood and met.

Sa fet y Con sid er a tion s for t h is In st r u m en t

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WARNING

Th is p r od u ct is a Sa fety Cla ss I in str u m en t (p r ovid ed w ith a

p r ot ective ea r t h in g gr ou n d in cor p or a t ed in t h e p ow er cor d ).

Th e m a in s p lu g sh a ll on ly be in se r ted in a sock et ou tlet

p r ovid ed w it h a p r otective e a r t h con ta ct. An y in ter r u p tion of

t h e p r ot ective con d u ct or in sid e or ou tsid e of th e p r od u ct is

lik ely to m a k e th e p r od u ct d a n ge r ou s. In ten tion a l in ter r u p tion

is p r oh ib ite d .

Do n ot exp ose t o or op e r a t e th is in str u m e n t in ou t d oor

a t m osp h er ic con d ition s su ch a s d ir ect r a in , h a il, slee t, sn ow ,

icin g, su n sh in e or w in d . Op er a te t h is in st r u m en t on ly w ith in it s

sp ecified tem p er a t u r e h u m id ity con d it ion s.

Th is in st r u m en t is e qu ip p ed w ith in te r n a l gr ou n d fa u lt cir cu it

in ter r u p ter cla ss A.

•

Th is d e vice d oe s n ot p r ot ect a ga in st ele ctr ica l sh ock d u e t o

con ta ct w it h b oth cir cu it con d u ct or s or a fa u lt in su p p ly

w ir in g t o p r od u ct.

Do n ot u se e xten sion cor d t o con n e ct t h is p r od u ct to p ow er

r e cep t a cle. Att en t ion -n e p a s u t ilise r d e r a llon ge p ou r

r a ccor d er le d et ecteu r -d isjon cte u r a la p r ise d e cou r a n t.

R ep la ce cor d set on ly w it h H P 8120 ser ies. At ten tion -

R em p la ce r u n iq u em e n t p a r u n cor d on a m ovib le n u m er o

8120.

• Do n ot u se in w et loca tion . Ne p a s u t iliser d a n s u n

e m p la cem en t m ou ille .

WARNING

Wh e n eve r it is lik ely t h a t t h e p r ote ct ion h a s b een im p a ir e d , t h e

in st r u m en t m u st be m a d e in op er a tive a n d be secu r ed a ga in st

a n y u n in t en d ed op er a tion .

If th is in str u m e n t is to be en er gized via a n a u t otr a n sfor m er (for

volt a ge r e d u ct ion ), m a k e su r e th e com m on t er m in a l is

con n e ct ed t o t h e ea r t h te r m in a l of t h e p ow er sou r ce .

If t h is p r od u ct is n ot u sed a s sp e cified , th e p r ot ect ion p r ovid e d

b y t h e eq u ip m en t cou ld b e im p a ir ed . Th is p r od u ct m u st be u se d

in a n or m a l con d it ion (in w h ich a ll m ea n s for p r ote ct ion a r e

in ta ct ) on ly.

No op e r a t or ser vice a ble p a r t s in t h is p r od u ct . R efer ser vicin g to

q u a lified p er son n el. To p r even t electr ica l sh ock , d o n ot r e m ove

cover s.

Ser vicin g in st r u ct ion s a r e for u se b y q u a lified p e r son n el on ly.

To a void ele ct r ica l sh ock , d o n ot p er for m a n y ser vicin g u n less

you a r e q u a lified t o d o so.

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Th e op en in g of cover s or r em ova l of p a r ts is lik ely t o e xp ose

d a n ger ou s volta ges. Discon n ect th e p r od u ct fr om a ll volta ge

sou r ces w h ile it is b ein g op e n ed .

Ad ju st m en ts d e scr ibed in th e m a n u a l a r e p e r for m ed w it h

p ow er su p p lied to th e in str u m en t w h ile p r ote ct ive cover s a r e

r e m oved . E n er gy a va ila ble a t m a n y p oin ts m a y, if con ta ct ed ,

r e su lt in p er son a l in ju r y.

Th e p ow e r cor d is con n e cte d t o in ter n a l ca p a citor s t h a t m y

r e m a in live for 5 secon d s a ft er d iscon n ect in g th e p lu g fr om its

p ow er su p p ly.

F or Con t in u e d p r ot ect ion a ga in st fir e h a za r d , r ep la ce t h e lin e

fu se(s) on ly w it h 250 V fu se(s) or th e sa m e cu r r en t r a t in g a n d

typ e (for exa m p le, n or m a l b low or t im e d ela y). Do n ot u se

r e p a ir ed fu ses or sh or t cir cu it ed fu seh old e r s. F USE : T 5.0A

CAUTION

Always use the three-prong ac power cord supplied with this product.

Failure to ensure adequate earth grounding by not using this cord may

cause personal injury and/or product damage.

This product is designed for use in Installation Category II and

Pollution Degree 2 per IEC 1010 and IEC 664 respectively. For indoor

use only.

This product has autoranging line voltage input, be sure the supply

voltage is within the specified range.

Ventilation Requirements: When installing the product in a cabinet,

the convection into and out of the product must not be restricted. The

ambient temperature (outside the cabinet) must be less than the

maximum operating temperature of the product by 4° C for every 100

watts dissipated in the cabinet. If the total power dissipated in the

cabinet is greater than 800 watts, then forced convection must be used.

To prevent electrical shock, disconnect instrument from mains (line)

before cleaning. Use a dry cloth or one slightly dampened with water to

clean the external case parts. Do not attempt to clean internally.

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Product Markings

CE - the CE mark is a registered trademark of the European

Community. A CE mark accompanied by a year indicated the year the

design was proven.

CSA - the CSA mark is a registered trademark of the Canadian

Standards Association.

CE R TIF ICATION

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.

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Wa r r a n t y

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 software, or firmware will be

uninterrupted or error free.

LIMITATION OF WAR R ANTY

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 R EME DIES

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 BASE ON CONTRACT,

TORT, OR ANY OTHER LEGAL THEORY.

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ASSISTANCE

Ma in t en a n ce Agr eem e n t s

Product maintenance agreements and other customer assistance

agreements are available for Hewlett-Packard products. For any

assistance, contact your nearest Hewlett-Packard Sales and Service

Office.

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R egion a l Sa les Offices

IMPORTANT

R egion a l Sa les a n d Ser vice Offices

Eastern USA

Sales Office

Eastern USA

Sales Office

Midwestern USA

Sales and Service

Hewlett-Packard Company

2101 Gather Rd.

Hewlett-Packard Company

2101 Gather Rd.

Hewlett-Packard Company

5201 Tollview Drive

Rolling Meadows, IL 60008

Tel: (708) 342-2000

Rockville, MD 20850

Tel: (301) 258-2000

Rockville, MD 20850

Tel: (301) 258-2000

Southern USA

Western USA

Sales and Service

Hewlett-Packard Company

1995 North Park Place

Atlanta, GA 30339

Sales

Service Center

Hewlett-Packard Company

930 E. Campbell Road

Richardson, TX 75081

Tel: (214) 699-4331

Hewlett-Packard Company

301 E. Evelyn Avenue

Mountain View, CA 94041

Tel: (415) 694-2000

Fax: (415) 694-0601

Tel: (404) 955-1500

Fax: (404) 980-7292

Service

Tel: (404) 850-2544

Fax: (404) 980-7292

Western USA

United States of America

Customer Information Center

Hewlett-Packard Company

Tel: (800) 752-0900

Sales and Service

Hewlett-Packard Company

24 Inverness Place East

Englewood, CO 80112

Sales

Sales and Service

Hewlett-Packard Company

1421 South Manhattan Avenue

Fullerton, CA 92631

Sales

6:00 am to 5:00 pm Pacific Time

Parts Direct: 1-800-227-8164

Tel: (303) 649-5000

Fax: (303) 649-5787

Service

Tel: (714) 999-6700

Fax: (714) 778-3033

Service

Tel: (303) 649-5512

Fax: (303) 649-5787

Tel: (714) 758-5490

Fax: (714) 778-3033

South Eastern Europe

Sales and Service

European Multicountry Region

Sales and Service

Northern Europe

Sales and Service

Hewlett-Packard Ges. m.b.h.

Liebigasse 1

Hewlett-Packard S.A.

P.O. Box 95

Hewlett-Packard Nederland B.V.

Startbaan 16

P.O. Box 72

150, Route dv Nant_dl_AVRIL

CH-1217 Meyrin 2

1187 XR

A-1222 Vienna, Austria

Telephone: 43 222 2500 0

Telex: 13 4425

Amstelveen, The Netherlands

P.O. Box 667

Geneva, Switzerland

Telephone: (41/22) 780-8111

Fax: (41/22) 780-8542

Telephone: 31/20 5476911 X 6631

Fax: 31-20-6471825NL

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Asia

J apan

International Sales Branch

Headquarters

Sales and Service

Hewlett-Packard Asia Ltd.

22-30/F Peregrine Tower

Lippo Center

Sales and Service

Hewlett-Packard S.A.

39 Rue Veyrot

Yokogawa-Hewlett-Packard Ltd.

3-29-21, Takaido-Higashi

Suginami-Ku, Tokyo 168

Telephone: 81 3 3331-6111

Fax: 81 3 3331-6631

P.O. Box 365

89 Queensway, Central

Hong Kong

1217 Meyrin 1

Geneva, Switzerland

Telephone: 41-22-780-4111

Fax: 41-22-780-4770

G.P.O. Box 863 Hong Kong

Telephone: 852-848-7777

Fax: 852-868-4997

Australia, New Zealand

Sales and Service

Canada

Sales and Service

Service Center

Hewlett-Packard Ltd.

P.O. Box 221

Hewlett-Packard (Canada) Ltd.

5150 Spectrum Way

Mississauga, Ontario L4W 5G1

Canada

Hewlett-Packard Company

17500 Transcanada Highway

S. Serv Road

31-41 J oseph Street

Blackburn, Victoria 3130

Telephone: (61/3) 895-2895

Fax: (61/3) 898-9257

Kirkland, Quebec H9J 2X8

Canada

Telephone: (416) 206-4725

Fax: (416) 206-4739

Telephone: (416) 206-3295

Canada

Latin America

United Kingdom

Sales and Service

Hewlett-Packard Ltd.

Cain Road

Service Center

Hewlett-Packard Company

LAHQ Mexico City

Col. Lomas de Virreyes

11000 Mexico D.F.

Mexico

Hewlett-Packard Ltd.

11120 178 Street

Edmonton, Alberta T5S 1P2

Canada

Amen Corner

Bracknell, Berkshire

RG12 1HN

Telephone: (403) 486-6666

Fax: (403) 489-8764

Telephone: (52/5) 326-4000

Fax: (52/5) 202 7718

United Kingdom

Telephone: 44 344 360000

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Con t en t s

In Th is Ma n u a l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

1. Get t in g St a r t ed w ith AMP S Test

About the Test Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Getting Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

What’s Included with this Test Set . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Manual and Automatic Operation Modes . . . . . . . . . . . . . . . . . . . . . . 21

IBASIC programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Maximizing the Accuracy of Your Measurements . . . . . . . . . . . . . . . . 22

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

TX Power Temperature Compensation . . . . . . . . . . . . . . . . . . . . . . . 22

Display an FM Carrier Signal (Loopback Test) . . . . . . . . . . . . . . . . . . 23

Connections for FM Carrier Loopback Test . . . . . . . . . . . . . . . . . . . 23

Get Started with the Test Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Preparing the Test Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Generate an FM Carrier Signal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Analyzing an FM Carrier Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

What to Do Next . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

2. Test in g AMP S Ba se Sta tion s

AMPS Tests You Can Perform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

What You Need to Know to Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Connecting the Test Set to Your Base Station . . . . . . . . . . . . . . . . . . . 32

Compensating for Signal Losses and Gains in the Test Setup . . . . . . 33

Transmitter Frequency Error/Offset and Power Test . . . . . . . . . . . . . 34

Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Begin Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Transmitter SAT Frequency and Deviation . . . . . . . . . . . . . . . . . . . . . 36

Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Transmitter Data Deviation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Transmitter Maximum Voice Deviation . . . . . . . . . . . . . . . . . . . . . . . . 40

Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Receiver Sensitivity (SINAD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Receiver Squelch Threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

3. Ut ilit y P r oced u r es

Beeper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Beeper Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

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Con ten t s

Measuring Insertion Losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Memory Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Memory Cards and Intialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Oscilloscope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Selecting the Oscilloscope’s Input . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Selecting the Oscilloscope’s Filters . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Triggering the Oscilloscope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Using the Marker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Online Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Help Screen Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Ports: HP-IB, Serial and Parallel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

HP-IB Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Serial Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Parallel Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Printing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Configuring the Test Set for Printing . . . . . . . . . . . . . . . . . . . . . . . . 61

Printing a Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Measuring Swept Return Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Tracking Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Using the Tracking Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

User Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Displaying the Pre-assigned Local User Keys . . . . . . . . . . . . . . . . . 66

Assigning a Local User Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Assigning a Global User Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

To Release a User Key Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Using Channel Numbers to Set Analyzer and Generator Frequencies 68

RF Chan and Tune Freq Fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Voltmeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Measuring AC Level and DC Level . . . . . . . . . . . . . . . . . . . . . . . . . . 70

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In Th is Ma n u a l

Wh a t is Discu ssed Th is Ma n u a l

This manual explains how to use the HP 8935 to manually test an

AMPS base station.

This document presents a step-by-step approach to AMPS base station

testing using the Test Set, including what you need to know before you

can start testing.

Wh a t is Not Discu ssed in th is Ma n u a l

•

General operation of the Test Set.

Changing display screens and their associated controls is discussed

in the Reference Guide (HP part number E6380-90019).

•

Detailed operation of the Test Set’s spectrum analyzer and

oscilloscope.

Although there are basic explanations in this manual, more detail is

provided in the Reference Guide concerning the various control

menus and fields available.

•

How to control your base station, switch system, or any other

software or hardware associated with your cell site equipment.

Each manufacturer and cellular service provider has their own cell

site control and base station configuration procedures that go beyond

the scope of this documentation.

How to perform IBASIC programming operations, such as writing,

editing, copying, or cataloguing programs.

Programming the Test Set is explained in the Progra mming Ma nual

(HP part number E6380-90018), and the IBASIC language is

explained in the HP Instrument BASIC User’s Handbook (HP part

number E2083-90005).

Con ven tion s Used in Th is Ma n u a l

The following conventions are used throughout this manual to help

clarify instructions and reduce unnecessary text:

Te st Set refers to the HP 8935.

Test Set keys are indicated like this: ^Preset

Test Set screen information, such as a measurement result or an error

message, is shown like this: TX Power 7.21 W

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Which Document is The following documents are part of the HP 8935 document set. Use the

Required?

table to help you decide which document you need.

Ta b le 1

Docu m en t Na viga t ion

Docu m en t

P a r t Nu m b er

Usa ge

CDMA Application

Guide

E6380-90016

Use this manual for basic CDMA measurements

and for getting started with the Test Set.

AMPS Application Guide E6380-90017

Use this manual for making AMPS base station

measurements.

Reference Guide

E6380-90019

Use this manual for screen and field descriptions

and general operation information about the Test

Set.

Programmer’s Guide

E6380-90018

E6380-90015

Use this manual to learn HP-IB syntax and for

learning how to program the Test Set.

Assembly Level Repair

Guide

Use this manual to perform calibration on the

Test Set and for general service information.

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Get tin g Sta r t ed w it h AMP S Test

This chapter introduces you to the HP 8935 CDMA Cellular/PCS Base

Station Test Set and its AMPS functions. For information on other

functions in the Test Set, see “Which Document is Required?” on page

18. To proceed immediately to the test procedures, see “AMPS Tests

You Can Perform” on page 30.

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Getting Started with AMPS Test

About the Test Set

Ab ou t th e Test Set

P r od u ct Descr ip t ion

This Test Set helps you install, commission, and maintain AMPS base

stations. It also allows you to test CDMA base stations. (This guide

discusses AMPS testing. For more information about CDMA testing,

refer to the CDMA Base Station Tests Applications Guide.)

The Test Set contains an RF signal generator, RF analyzer, AF

analyzer, and AF generator to test AMPS base stations. The following

tools are also included:

Code Domain Analyzer

CDMA Analyzer

CDMA Generator

Spectrum Analyzer

Power Meter

Oscilloscope

AC/DC Voltmeter

IBASIC controller

Ba t ter ies

There are two methods the Test Set uses to back up its RAM. One is a

set of two AA batteries mounted inside the rear panel of the Test Set.

You must periodically change these batteries. The second method of

RAM backup is an internal battery. It is not user serviceable.

Failure to take prompt action may result in loss of RAM data including

IBASIC programs and SAVE/RECALL states stored in the RAM.

To change the AA batteries, use the following procedure:

1. Turn off power and unplug the Test Set.

2. Remove the six screws in the rear panel using a TX-15 TORX^(R)

screwdriver.

3. Remove the rear cover.

4. Replace the AA batteries. Do not use rechargeable batteries.

5. Replace the rear panel.

Chapter1

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Getting Started with AMPS Test

About the Test Set

Get t in g H elp

If you have problems using this Test Set, and cannot find the solution in

these documents or the help screens, please use one of the following

contacts:

Your local or regional sales office (see "Regional Sales and Service

Offices" on page 12)

U.S. Call Center: 800 542-4844

Korea HP Direct: (82/2) 769-0800

Canada HP Direct: (800) 387-3154

European Call center: +31 20 547-9990

Test and Measurement Organization on the web:

http://www.tmo.hp.com/

Chapter 1

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Getting Started with AMPS Test

About the Test Set

Wh a t ’s In clu d ed w it h t h is Test Set

The equipment commonly shipped with the base Test Set is listed

below. Options that you order with your Test Set may change this list.

Test Set

Documentation:

•

CDMA Applications Guide

CD-ROM with the above listed manual, AMPS Ba se Sta tion Tests

Applica tions Guide, Assembly Level Repair Manual,

Progra mmer’s Guide, and HP 8935 Reference Guide in Adobe™

Acrobat Reader format (.pdf).

Power cord

Cover for the front panel of the Test Set

Chapter1

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Getting Started with AMPS Test

Manual and Automatic Operation Modes

Ma n u a l a n d Au tom a tic Op er a tion Mod es

You can operate the Test Set in either of two modes: manual or

automatic. Controlling the Test Set with the keypad is manual

operation. Controlling the Test Set with a program is automatic

Operation.

Use manual mode when you want to control the Test Set with the front

panel. Manual operation is described in this document.

Use automatic mode when you want to control the Test Set with its

internal IBASIC controller. To use the Test Set in automatic mode, you

must load an IBASIC program into the Test Set’s memory.

IBASIC p r ogr a m s

You can obtain an IBASIC program in two ways: either write it

yourself, or purchase a software package from Hewlett-Packard. To

write programs yourself, refer to the Progra mmer’s Guide, included

with the Test Set’s documentation.

Many of HP’s software packages are manufacturer-specific packages.

Manufacturer-specific software packages provide automated testing of

the manufacturer’s base station to greatly reduce test times and

provide test setup repeatability. Once configured, the software typically

controls both the base station and the Test Set and prompts the user to

make the required connections during testing. Test results can be

printed and/or saved to a file for later use. Contact your local HP Sales

Office to find out which software packages are currently available.

Chapter 1

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Getting Started with AMPS Test

Maximizing the Accuracy of Your Measurements

Ma xim izin g t h e Accu r a cy of You r Mea su r em en ts

This Test Set is designed to make highly accurate measurements.

However, to ensure that you have the most accurate measurements

available, you can perform the following tasks:

Ca lib r a t ion

You should calibrate the Test Set whenever you change or add an

internal assembly. You may want to calibrate when you upgrade

firmware. See the Assembly Level Repair Ma nual for calibration

procedures.

TX P ow er Tem p er a t u r e Com p en sa tion

The Test Set is internally compensated. However, power measurement

calibration can be optimized for temperature changes using the

TX Pwr Zerofield on the RF ANALYZER screen. The new calibration

factors are stored in RAM until the next time the routine is used.

To have the Test Set zero the TX Power measurement automatically

when needed, set the Auto Zerofield on the RF ANALYZER screen to

Auto. During operation, the Test Set will temporarily halt the TX

Power measurement as it is calibrated. This can happen during a

measurement. If interrupting the measurement is a problem for your

test setup, set the Auto Zerofield to Manual, and select

TX Pwr Zerowhenever you want to manually calibrate the

measurement.

Chapter1

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Getting Started with AMPS Test

Display an FM Carrier Signal (Loopback Test)

Disp la y a n F M Ca r r ier Sign a l (Loop b a ck Test)

Since an AMPS base station is basically a continuous wave (CW) FM

signal, this section will guide you through the process of generating and

displaying an FM signal at a cellular band frequency. It is intended to

make you feel more comfortable with using the Test Set. If you are

ready to begin testing, proceed to Chapter 2.

NOTE

In the following operating example, you enter a common frequency for

the RF generator and RF analyzer to create and view the Test Set’s own

signal. However, typical AMPS base station testing uses channel

assignments with different transmit and receive frequencies. This is

explained further in "Using Channel Numbers to Set Analyzer and

Generator Frequencies" on page 68.

Con n ect ion s for F M Ca r r ier Loop b a ck Test

Connect the Test Set in the following manner.

F igu r e 1-1

F M Ca r r ier Loop b a ck Test Con n e ct ion s

BASEBAND OUT

AUDIO OUT

AUDIO IN

MODULATION

INPUT

AUDIO

MONITOR

OUTPUT

EXT SCOPE

TRIG IN

VIDEO

OUT

16X

SYNC IN

EVEN

SECOND

CHIP CLOCK CHIP CLOCK

RF IN/OUT

ANT IN

DUPLEX

19.6608

MHz OUT

1.2288

FRAME

CLOCK

TRIG/QUAL

10 MHz

REF OUT

REF IN

MHz OUT

RF IN/OUT

DUPLEX OUT

Chapter 1

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Getting Started with AMPS Test

Display an FM Carrier Signal (Loopback Test)

Get St a r t ed w it h t h e Test Set

Here are some guides for selecting screens and fields:

Use the knob to move the cursor around the screen. Reverse video boxes

indicate fields that can be selected.

To select a field on the screen, push the knob, or press the ^Enterkey.

Use the ^{RF Gen}, RF Anl, and Spec Anl keys to access the RF GENERATOR,

RF ANALYZER, and SPEC ANL screens.

Selecting the titlebar at the top of the screen displays a list of screens

that can be immediately accessed when selected.

P r ep a r in g t h e Test Set

1. Plug in the Test Set.

2. Turn on the Test Set (or press ^Presetif it is already on). The CDMA

ANALYZER screen will be displayed.

3. Press the ^{Inst Config}key.

4. Select RF Display, and set the field to Freq.

5. Verify your connections. See “C onnections for FM Carrier Loopback

Test” on page 23.

Gen er a te a n F M Ca r r ier Sign a l

Refer to F igure 1-2.

1. Press ^{CDMA Gen}to go to the CDMA GENERATOR screen.

2. Select CW RF Pathand set it to Bypass. This shuts off the IQ

modulation normally used for CDMA testing.

3. Press the ^{RF Gen}key to go to the RF GENERATOR screen.

4. Select RF Gen Freqand use the keypad to set the frequency to

850.000 MHz.

5. Select Amplitudeand set the amplitude to 0 dBm.

6. Select Output Portand verify that the port is set to Dupl.

7. Turn on FM modulation by positioning the cursor in the lower half of

the AFGen1 Tofield and pressing the ^On/Offkey.

The default FM deviation is 2.9 kHz. The default FM rate is

1.0 kHz.

Chapter1

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Getting Started with AMPS Test

Display an FM Carrier Signal (Loopback Test)

NOTE

AF generators 1 and 2 are automatically turned off anytime you access

any of the CDMA screens (CDMA GENERATOR, CDMA ANALYZER,

CODE DOM). This prevents accidental addition of AM or FM when

generating a CDMA signal. If you accidentally access any of the CDMA

screens when testing an AMPS base station, any AM or FM you

specified on the RF GENERATOR screen will be turned off while on

that CDMA screen. Previously set AM and/or FM are automatically

turned back on when returning to the RF GENERATOR screen.

F igu r e 1-2

Set tin g Up t h e R F Gen er a t or

850.000000

Enter 850 MHz

Enter 0 dBm

Turn on FM

0.0

2.9

kHz

Select DUPLEX

Chapter 1

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Getting Started with AMPS Test

Display an FM Carrier Signal (Loopback Test)

An a lyzin g a n F M Ca r r ier Sign a l

1. Press the RF Anl key to go to the RF ANALYZER screen.

2. Select Tune Freqand use the keypad to set the frequency to

850.000 MHz. Notice that the Frequency Error, TX Power, FM

Deviation, and AF Frequency for the signal are automatically

displayed.

F igu r e 1-3

Defa u lt Digita l Mea su r em e n t s for t h e F M Ca r r ier

3. Press the ^{Spec Anl}key to go to the SPECTRUM ANALYZER screen.

4. The signal is displayed.

5. Select Spanand set it to 30.000 kHzto get a good view of the

modulated signal. See F i gure 1-4.

F igu r e 1-4

F M Ca r r ie r Sign a l

Chapter1

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Getting Started with AMPS Test

Display an FM Carrier Signal (Loopback Test)

Wh a t t o Do Next

Congratulations! You are now ready to begin testing your AMPS Base

Station. Proceed to Chapter 2, “Testing AMPS Base Stations,” on page

29.

Chapter 1

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Getting Started with AMPS Test

Display an FM Carrier Signal (Loopback Test)

Chapter1

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Testin g AMP S Ba se St a tion s

Advanced Mobile Phone System (AMPS) base stations for cellular telephone

systems are basically continuous wave (CW) FM voice transceivers with some

control and data signals for system operation. This chapter explains how to use

the Test Set to manually test the RF and AF performance of the transmitter

and receiver portions of the base station.

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Testing AMPS Base Stations

AMPS Tests You Can Perform

AMP S Tests You Ca n P er for m

The following tests are explained in this manual:

•

"T r ansmitter Frequen c y E rr o r /Offset and Power Test" on page 34.

"T r ansmitter SAT Frequen c y a nd Deviation" on page 36.

"T r ansmitter Data Deviation" o n p a g e 38.

"T r ansmitter Maximum Voice Deviation" on page 40.

"Receiver Sensitivity (SINAD)" on page 42.

"Receiver Squelch Threshold" on page 45.

CAUTION

Transmitter power (TX Power) can only be measured through the Test

Set’s RF IN/OUT port. Verify that the signal connected to this port does

not exceed the limits printed by the port.

If you hear a loud “warbling” sound from the Test Set, turn off your

transmitter immediately! This is the over-power alarm, warning that

instrument damage may occur. Caution: Turning the Test Set off at this

point does not protect the internal circuitry. Also, removing the cable

from the RF IN/OUT port without turning the transmitter off may

damage your transmitter or power amplifier (due to an impedance

mismatch).

The ANT IN port is only used for analyzing very low level signals

(≤60 mW). Never attempt to measure a transmitter’s power directly

using the ANT IN port, as instrument damage may occur.

The DUPLEX OUT port is only used to provide RF signals to the base

station’s receive port(s). It must not be connected to the base stations

transmit port or damage may occur to the Test Set.

Chapter2

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Testing AMPS Base Stations

What You Need to Know to Begin

Wh a t You Need to Kn ow to Begin

You need to know how to control the base station and the basic

operation of the Test Set before you can test your base station.

Test Set operation includes how to change control settings, how to

navigate between control screens, and how to change the units used for

any measurement or setting. Test Set operation and feature

descriptions are included in the Reference Guide.

Base station operation includes turning the transmitter on and off,

turning the SAT tone and data signals on and off, and knowing where

to connect test cables from the Test Set to your base station.

You also need to properly configure the Test Set for your test situation.

The following sections describe operations needed to simplify Test Set

operation and minimize measurement errors.

•

Entering the known losses and/or gains in your test setup is

explained in "Co m pensating f or Signal Losses and Gains in the Test

Setup" on page 33.

•

Measuring the signal loss through cables and other devices is

explained in "Measuring Insertion Losses" on page 51.

Choosing to enter your base station’s transmit and receive

frequencies by channel number or by discrete frequencies is

explained in "Using Channel Numbers to Set Analyzer and

Generator Frequencies" on page 68.

Chapter 2

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Testing AMPS Base Stations

Connecting the Test Set to Your Base Station

Con n ectin g th e Test Set to You r Ba se Sta t ion

The connections shown in F i gure 2-1 indicate a “generic” base station

using a test interface for audio test signals and a laptop computer

running a control program to control the base station. A power splitter

is used for testing the receiver ports. Although this is a common setup

for performing tests, audio and RF connections to base stations and the

ways base stations are controlled vary among manufacturers.

F igu r e 2-1

Con n ect ion s Be tw ee n th e Test Se t a n d th e Ba se St a tion

Audio

Out

Audio

RF IN/OUT Port

(High Power RF Input)

DUPLEX OUT

(RF Gen Out)

ANT IN

(≤60mW)

side1_75.eps

AMP S BASE STATION

Receive A

Receive B

Power

Splitter

TX Mod

RX Audio

Audio Test Signal

breakout port.

Au d io Sign a l

Test In te r fa ce

Local Control

Port

La p t op R u n n in g Con t r ol P r ogr a m

Chapter2

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Testing AMPS Base Stations

Compensating for Signal Losses and Gains in the Test Setup

Com p en sa t in g for Sign a l Losses a n d Ga in s in t h e Test

Setu p

Signal losses or gains through cables, splitters, combiners, connectors,

amplifiers, or coaxial switches must be accounted for to ensure

measurement accuracy. These values are entered in the INSTRUMENT

CONFIGURE screen (press the ^{Inst Config}key).

Refer to "Measuring Insertion Losses" on page 51 for information about

measuring cable/system losses.

•

Total losses/gains between the transmitter’s output and the Test

Set’s RF IN/OUT port are entered in the RF In/Outfield. A

negative number (indicating a loss) causes the displayed TX power

measurement to be increased by the entered amount. A positive

number (indicating a gain) causes the RF analyzer to decrease the

displayed TX power measurement by the entered amount.

•

Total losses between the Test Set’s DUPLEX OUT port and the base

station’s receive port(s) are entered in the Duplex Outfield as a

negative number (such as −1.2). The RF Generator will

automatically increase its level out of the DUPLEX OUT port by the

value entered to compensate for the loss.

F igu r e 2-2

E n t er in g Test System Losses a n d Ga in s

Set the RF Level Offset

field to On.

On/Off

LS AMPS

Enter the loss or gain

between each port and the

base station.

Chapter 2

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Testing AMPS Base Stations

Transmitter Frequency Error/Offset and Power Test

Tr a n sm itt er F r eq u en cy E r r or /Offset a n d P ow er Test

This test compares the measured center frequency of the base station to

the AMPS channel standard. The resulting difference is the frequency

error (also called the frequency offset). The measurement can be

displayed in frequency units (Hz, kHz, MHz) or in parts per million

(ppm). Measurements are made with all modulation turned off.

The transmitter’s power can be measured any time the transmitter is

keyed, but may not be accurate unless all modulation is turned off.

Transmitter power may be specified by the manufacturer in units of

watts (W), milliwatts (mW), dBm, Volts (V), or millivolts (mV).

P r er eq u isites

The following conditions must be met before testing:

❒ The Test Set is turned on and Preset was pressed to esta blish a

known instrument state.

❒ You have configured the Test Set for channel or frequency tuning as

necessary (see “Usin g Ch a n n el Nu m be r s to Set An a lyzer a n d

Ge n er a t or F r eq u en cies” on p a ge 68).

❒ You have specified any gains or losses in your test system (s ee

“Com p e n sa tin g for Sign a l Losses a n d Ga in s in th e Test

Set u p ” on p a ge 33).

Begin Testin g

1. Turn off the ba se sta tion’s RF transmitter. A transmitter can be

damaged if it is not transmitting into a specified load, such as an

antenna, power amplifier, duplexer, or power meter with a 50Ω

input impedance.

2. Verify that the transmitter’s rated RF power (or the level out of the

power amplifier if applicable) does not exceed the level printed next

to the Test Set’s RF IN/OUT connector.

3. Connect the transmitter’s RF output to the Test Set’s RF IN/OUT

port.

4. Turn off any modulation signals to the base station.

•

Turn off the SAT tone.

Turn off any data (digital) modulation signals.

Turn off any audio (voice) modulation signals.

5. Press the ^{RF Anl}key to access the RF ANALYZER screen.

6. Enter the transmitter’s RF Channelnumber.

Chapter2

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Testing AMPS Base Stations

Transmitter Frequency Error/Offset and Power Test

7. Turn on the transmitter. The TX Freq Errorand TX Power

measurements are displayed.

Note: Disregard any values shown for FM Deviation and AF Freq at

this time.

F igu r e 2-3

Tr a n sm it te r F r eq u en cy E r r or a n d P ow er Te st R esu lts

Chapter 2

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Testing AMPS Base Stations

Transmitter SAT Frequency and Deviation

Tr a n sm itt er SAT F r eq u en cy a n d Devia tion

This test measures the transmitter’s Supervisory Audio Tone (SAT)

frequency and deviation in the absence of any other modulating signal.

P r er eq u isites

The following conditions must be met before testing:

❏ The Test Set is turned on and Preset was pressed to esta blish a

known instrument state.

❒ You have configured the Test Set for channel tuning (see “Usin g

Ch a n n el Nu m be r s to Set An a lyzer a n d Ge n er a t or

F r eq u e n cie s” on p a ge 68).

❒ You have specified any gains or losses in your test system (s ee

“Com p e n sa tin g for Sign a l Losses a n d Ga in s in th e Test

Set u p ” on p a ge 33).

Test P r oced u r e

1. Turn off the ba se sta tion’s RF transmitter. A transmitter can be

damaged if it is not transmitting into a specified load, such as an

antenna, power amplifier, duplexer, or power meter with a 50Ω

input impedance.

2. Verify that the transmitter’s rated RF power (or the level out of the

power amplifier if applicable) does not exceed the level printed next

to the Test Set’s RF IN/OUT connector.

3. Connect the transmitter’s RF output to the Test Set’s RF IN/OUT

port.

4. Turn off the voice modulation to the transmitter.

5. Turn off data modulation to the transmitter.

6. Enable SAT transmission.

7. Press ^Shift, RF Anl (AF Anl) to access the AF ANALYZER screen.

Chapter2

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Testing AMPS Base Stations

Transmitter SAT Frequency and Deviation

8. Set the Filter 2field to 6 kHz BPF. This helps remove unwanted

noise.

6kHz BPF

9. Press the ^{RF Anl}key to access the RF ANALYZER screen.

10.Enter the transmitter’s channel number in the RF Channelfield.

11.Turn on the transmitter. The FM Deviationand AF Freqfor the

SAT are displayed (as well as Frequency Error and TX Power).

F igu r e 2-4

SAT F r eq u e n cy a n d Devia t ion Test R e su lts

SAT Deviation

SAT Frequency

Chapter 2

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Testing AMPS Base Stations

Transmitter Data Deviation

Tr a n sm itt er Da t a Devia tion

This test measures the transmitter’s digital data deviation in the

absence of any other modulating signal.

P r er eq u isites

The following conditions must be met before testing:

❒ The Test Set is turned on and Preset was pressed to esta blish a

known instrument state.

❒ You have configured the Test Set for channel tuning (see “Usin g

Ch a n n el Nu m be r s to Set An a lyzer a n d Ge n er a t or

F r eq u e n cie s” on p a ge 68).

❒ You have specified any gains or losses in your test system (s ee

“Com p e n sa tin g for Sign a l Losses a n d Ga in s in th e Test

Set u p ” on p a ge 33).

Test P r oced u r e

1. Turn off the ba se sta tion’s RF transmitter. A transmitter can be

damaged if it is not transmitting into a specified load, such as an

antenna, power amplifier, duplexer, or power meter with a 50Ω

input impedance.

2. Verify that the transmitter’s rated RF power (or the level out of the

power amplifier if applicable) does not exceed the level indicated

next to the Test Set’s RF IN/OUT connector.

3. Connect the transmitter’s RF output to the Test Set’s RF IN/OUT

connector.

4. Turn off voice modulation to the transmitter.

5. Turn off the SAT to the transmitter.

6. Turn on the data modulation to the transmitter.

7. Press ^Shift, RF Anl (AF Anl) to access the AF ANALYZER screen.

Chapter2

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Testing AMPS Base Stations

Transmitter Data Deviation

8. Set Filter 1to <20Hz HPF.

9. Set Filter 2to >99kHz LP.

<20Hz HPF

>99kHz LPF

10.Press the ^{RF Anl}key to access the RF ANALYZER screen.

11.Enter the transmitter’s channel number in the RF Channelfield.

12. Turn on the transmitter. The FM Deviationfrom the data is

displayed.

F igu r e 2-5

Da t a Devia tion Te st R esu lts

Data Deviation

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Testing AMPS Base Stations

Transmitter Maximum Voice Deviation

Tr a n sm itt er Ma xim u m Voice Devia tion

This test measures the transmitter’s maximum FM Deviation by a voice

signal in the absence of any other modulation signal.

P r er eq u isites

The following conditions must be met before testing:

❒ The Test Set is turned on and Preset was pressed to esta blish a

known instrument state.

❒ You have configured the Test Set for channel tuning (see “Usin g

Ch a n n el Nu m be r s to Set An a lyzer a n d Ge n er a t or

F r eq u e n cie s” on p a ge 68).

❒ You have specified any gains or losses in your test system (s ee

“Com p e n sa tin g for Sign a l Losses a n d Ga in s in th e Test

Set u p ” on p a ge 33).

Test P r oced u r e

1. Turn off the ba se sta tion’s RF transmitter. A transmitter can be

damaged if it is not transmitting into a specified load, such as an

antenna, power amplifier, duplexer, or power meter with a 50Ω

input impedance.

2. Verify that the transmitter’s rated RF power (or the level out of the

power amplifier if applicable) does not exceed the level indicated

next to the Test Set’s RF IN/OUT connector.

3. Connect the transmitter’s RF output to the Test Set’s RF IN/OUT

port.

4. Connect the transmitter’s audio modulation (voice) input to the Test

Set’s AUDIO OUT port.

5. Enable the transmitter’s audio (speech) modulation.

6. Turn off any modulation signals to the base station other than audio.

7. Press the ^{RF Anl}key to access the RF ANALYZER screen.

8. Enter the transmitter’s channel number in the RF Channelfield.

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Testing AMPS Base Stations

Transmitter Maximum Voice Deviation

9. Press the RF Gen key to access the RF GENERATOR screen.

10. Set the AFGen1 Tofield to Audio Out, and a level of 50 mV.

Audio Out

Initially 50 mV

11. With the cursor still positioned in front of the level setting

(50 mV), press the ^{Incr Set}key and enter 20 dB using the keypad.

12. Turn on the transmitter.

13. With the cursor still positioned in front of the level setting (50 mV)

press the up-arrow key once to increment the level by 20 dB.

14.Read the FM deviation.

15.Vary the AFGen1 Freqfrom 300 Hz to 3 kHz and observe the FM

deviation at each frequency. Deviation must not exceed the rated

system specification of ±12 kHz at any time.

Watch the

FM Deviation

while...

...changing

Increment

the AFGen1

AFGen1

Freq from

level by

300 Hz to

3 kHz.

20 dB.

16.Disconnect the cable to the transmitter’s audio modulation input

(connected in step 4) to reduce the chance of errors in your next

transmitter test.

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Testing AMPS Base Stations

Receiver Sensitivity (SINAD)

R eceiver Sen sitivity (SINAD)

This test measures the receiver’s ability to demodulate voice signals

from very low RF carrier levels.

P r er eq u isites

The following conditions must be met before testing:

❒ The Test Set is turned on and Preset was pressed to esta blish a

known instrument state.

❒ You have configured the Test Set for channel tuning (see “Usin g

Ch a n n el Nu m be r s to Set An a lyzer a n d Ge n er a t or

F r eq u e n cie s” on p a ge 68).

❒ You have specified any gains or losses in your test system (s ee

“Com p e n sa tin g for Sign a l Losses a n d Ga in s in th e Test

Set u p ” on p a ge 33).

Test P r oced u r e

1. Turn off the base station’s transmitter.

2. Turn the base station’s radio squelch, data, and SAT off.

3. Connect the base station receiver’s inputs to the Test Set’s DUPLEX

OUT port.

4. Connect the receiver’s audio output to the Test Set’s AUDIO IN

port(s). Unless the receiver’s audio out amplifier is not referenced to

chassis ground, you should only connect to the AUDIO IN - HI port.

For floating output amplifiers, see the HP 8935 Reference Manual

for information on using the AUDIO IN - LO connection.

5. Press ^{CDMA Gen}to access the CDMA GENERATOR screen.

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Testing AMPS Base Stations

Receiver Sensitivity (SINAD)

6. Set the CW RF Pathfield to Bypass. This turns off the IQ

modulation used for CDMA tests.

Bypass/IQ

Set to Bypass.

7. Press ^SHIFT, RFAnl (AF Anl) to access the AF ANALYZER screen.

8. Set the AF Anl Infield to Audio In.

9. Set the Filter 1field to C Message.

Set to Au d io In .

Audio In

Set to C Messa ge.

C Message

10. Press the ^{RF Gen}key to access the RF GENERATOR screen.

11. Change the lower audio measurement to SINAD. This is done by

selecting the existing measurement and choosing SINAD from a list

of choices.

12. Set the AFGen1 Tofield to FM and turn it on (2.9 kHz) using the

On/Off key.

13. Enter the transmitter’s channel number in the RF Channelfield.

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Testing AMPS Base Stations

Receiver Sensitivity (SINAD)

14. Set an initial RF generator level in the Amplitudefield. This value

depends on the sensitivity of the receiver; but −90 dBm should be a

good starting point. At this point you should be able to turn the Test

Set’s Volume knob clockwise and hear a 1 kHz tone from the Test

Set’s speaker.

Set to

SINAD.

Enter the

RF Chan-

nel number.

Turn on FM

modulation

for the RF

Generator.

Set an initial

level of

−90 dBm.

15. Set the Amplitudefield to increment in 1 dB units. To do this,

position the cursor in front of the Amplitudefield, press the

Incr Set key, and enter 1 dB using the keypad.

16. With the cursor front of the field, turn the knob to decrease the

Amplitudesetting until the desired SINAD measurement is

displayed (commonly 12 dB). You should hear the 1 kHz tone get

noisy as you approach the 12 dB SINAD reading.

F igu r e 2-6

SINAD Te st R esu lts

...the SINAD

reading goes

down and the

signal through

the Test Set’s

speaker gets

noisy.

As you decrease the

RF generator

amplitude into your

receiver....

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Testing AMPS Base Stations

Receiver Squelch Threshold

R eceiver Squ elch Th r esh old

This test determines the RF Signal level where the receiver squelches

(switches off) the audio output.

P r er eq u isites

The following conditions must be met before testing:

❒ The Test Set is turned on and PRESET was pressed to establish a

known instrument state.

❒ You have pressed the Preset key to establish a known instrument

state.

❒ You have configured the Test Set for channel tuning (see “Usin g

Ch a n n e l Nu m b er s t o Set An a lyze r a n d Gen e r a tor

F r equ en cies” on p a ge 68).

❒ You have specified any gains or losses in your test system (s ee

“Com p en sa t in g for Sign a l Losses a n d Ga in s in t h e Test

Se tu p ” on p a ge 33).

Test P r oced u r e

1. Turn off the base station’s transmitter.

2. Turn the base station’s data and SAT off.

3. Connect the base station receiver’s inputs to the Test Set’s DUPLEX

OUT port.

4. Connect the receiver’s audio output to the Test Set’s AUDIO IN

port(s). Unless the receiver’s audio out amplifier is not referenced to

chassis ground, you should only connect to the AUDIO IN - HI port.

For floating output amplifiers, see the HP 8935 Reference Manua l

for information on using the AUDIO IN - LO connection.

5. Press ^{CDMA Gen}to access the CDMA GENERATOR screen.

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Testing AMPS Base Stations

Receiver Squelch Threshold

6. Set the CW RF Pathfield to Bypass. This turns off the IQ

modulation used for CDMA tests.

Bypass/IQ

Set to Bypass.

7. Press ^SHIFT, RFAnl (AF Anl) to access the AF ANALYZER screen.

8. Set the AF Anl Infield to Audio In.

9. Press the ^{RF Gen}key to access the RF GENERATOR screen.

10.Set the AFGen1 Tofield to FM and set it to 8 kHz deviation.

11.Enter the transmitter’s channel number in the RF Channelfield.

12.Set the Atten Holdfield to On. The prevents the Test Set from

changing its internal attenuators during the test to prevent

erroneous squelch interruption.

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Testing AMPS Base Stations

Receiver Squelch Threshold

13.Set an initial RF generator level in the Amplitudefield. This value

depends on the sensitivity of the receiver; but −90 dBm should be a

good starting point. At this point you should be able to turn the Test

Set’s Volume knob clockwise and hear a 1 kHz tone from the Test

Set’s speaker.

Enter the

RF channel

number.

Turn on FM

modulation

for the RF

generator

and set to

8 kHz.

Set a initial

level of

−90 dBm.

8.00

On/off

Set to On.

14.Set the Amplitudefield to increment in 1 dB units. To do this,

position the cursor in front of the Amplitudefield, press the

Incr Set key, and enter 1 dB using the keypad.

15.With the cursor in front of the Amplitudefield, turn the knob

counterclockwise to decrease the Amplitudesetting until the

received audio is no longer heard on the Test Set’s speaker (or until

the AC Levelreading drops suddenly). The RF amplitude at which

the audio signal is no longer output is the squelch threshold.

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Testing AMPS Base Stations

Receiver Squelch Threshold

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Utilit y P r oced u r es

This chapter contains procedures and instructions that will help you

make the most efficient use of your Test Set.

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Utility Procedures

Beeper

Beep er

The beeper notifies you when a message is displayed. Since a message

may be removed from the screen before you notice it, it is better to leave

the beeper on to alert you to errors during operation.

The beeper’s volume setting is retained when the instrument is turned

off.

Beep er Con t r ol

1. Press the Inst Config key to go to the INSTRUMENT CONFIGURE

screen.

2. Select Beeper.

3. Choose from Off, Quiet, or Loud.

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Utility Procedures

Measuring Insertion Losses

Mea su r in g In ser tion Losses

To make accurate power and receiver measurements, the signal loss

through the cables or other devices used in your test setup must be

known and entered into the Test Set’s INSTRUMENT CONFIGURE

screen to compensate for these losses.

Signal losses are measured using a built-in automated routine that

runs on the Test Set’s IBASIC controller. Losses can be calibrated at a

discrete (single) frequency or over a frequency range. This is one

routine included in a set of utility procedures called the RF TOOLS.

During the test, a calibrated signal goes through two 6-dB

attentuators/pads (such as Mini-Circuits model NAT-6-60) and a short

type-N male-to-male cable to establish a known reference point. The

Test Set then prompts you to connect the device under test to measure

the additional loss through that device. (The pads and cable are not

part of the standard equipment shipped with the Test Set.)

Figure 3-1 shows how to load and run the RFTOOLS routines and

select the desired insertion loss test.

F igu r e 3-1

Loa d in g a n d R u n n in g th e In ser t ion Loss Te st

1 Select R OM.

Select R F TOOLS.

Select R u n Test .

When the screen below appears.......

...use the knob to move the cursor and

select either Discr et e F r e q In ser tion

Loss or Sw ep t In ser tion Loss. When

run, the test prompts you to enter the

necessary test frequency information

and displays setup diagrams. Make the

indicated connections and follow

instructions as you are prompted by the

program.

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Utility Procedures

Memory Cards

Mem or y Ca r d s

The slot on the front of the Test Set is used for memory cards. The slot

is used for the following:

•

Storage of save/recall registers

Loading of software (either HP or self-written)

Collecting data (only when using software)

Upgrading firmware or software

Mem or y Ca r d s a n d In t ia liza t ion

There are several types of memory cards available, and the following

cards are used with the Test Set:

•

SRAM: used for save/recall and data storage

Flash ROM: used when upgrading firmware

OTP (One-Time Programmable): used for HP software

Flash ROM cannot be used for collecting data and Save/Recall.

Data cannot be loaded on Flash RAM and OTP cards with the Test Set’s

memory card slot.

SRAM can be initialized with the Test Set.

In itia lizin g SR AM Ca r d s for Sa ve/Reca ll a n d Da t a

Collection

1. Insert the SRAM card into the slot. If the card is uninitialized, a

message will appear at the top of the display.

2. Press ^Shiftand IO Confg to display the I/O CONFIGURE screen.

3. Using the knob, locate the FORMAT CARDfield.

4. Select the FORMAT CARD field. A prompt will appear at the top of

the display. Pressing ^Yeswill erase and initialize the card.

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Utility Procedures

Oscilloscope

Oscilloscop e

The built-in 50 kHz oscilloscope provides

•

multiple triggering formats (internal and external)

single-shot and pre-trigger viewing for single events

full marker capability with automatic level and time readout

Time/division, volts/division and vertical offset are displayed and can be

changed using the front-panel knob.

Input to the Oscilloscope (SCOPE) is provided from various sources

including direct inputs to the Audio Input and Modulation Input

connectors. Oscilloscope functions are accessed from the AF Anl and

SCOPE screens.

F igu r e 3-2

FM Demod

In p u ts a n d F ilter s for t h e Oscilloscop e

Controlled by

AF Anl In

field

Controlled by

Scope To

field

Input

AM Demod

SSB Demod

AUDIO IN connector

Filters

Analog Modulation In

connector

Scope

De-emp

FM Mod

AM Mod

Audio Out

Notch

Audio Monitor

Out connector

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Utility Procedures

Oscilloscope

Select in g th e Oscilloscop e’s In p u t

1. Press Shift, then RF Anl (AF Anl) to select the AF ANALYZER screen.

2. Select the AF Anl Inputfield. A list of choices appears.

3. Select the desired input to the scope:

• FM Demodfor FM demodulated audio from input signals

connected to the RF IN/OUT or ANT IN connectors.

• AM Demodfor AM demodulated audio from input signals

connected to the RF IN/OUT or ANT IN connectors.

• SSB Demod for SSB demodulated audio from input signals

connected to the RF IN/OUT or ANT IN connectors.

• Audio Infor a signal connected to the AUDIO IN connector.

• Ext Modfor a signal connected to the rear panel MODULATION

INPUT connector.

• FM Modfor the FM modulated audio from the RF generator

section.

• AM Modfor the AM modulated audio from the RF generator

section.

• Audio Out for the signal present at the AUDIO OUT connector.

4. The input to the oscilloscope is displayed on the SCOPE screen.

Select in g th e Oscilloscop e’s F ilter s

1. Press Shift, then RF Anl (AF Anl) to select the AF ANALYZER screen.

2. Select the Scope Tofield. A list of choices should appear.

3. Select the desired filtering for the signal:

• Inputif you want no filtering (dc coupled)

•

Filters to route the audio to the oscilloscope after passing through

filters 1 and 2. (ac coupled)

De-emp to route the audio to the oscilloscope after passing

through filters 1 and 2, and the de-emphasis circuitry.(ac coupled)

Notch to route the audio to the oscilloscope after passing through

Filters 1 and 2, the de-emphasis circuitry, and notch filter

circuitry. (ac coupled)

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Utility Procedures

Oscilloscope

Tr igger in g t h e Oscilloscop e

You can control following triggering features of the oscilloscope:

•

Trigger: external or internal

Automated or normal triggering

Continuous or single shot triggering

Trigger level

Trigger delay

The oscilloscope is triggered using the Triggermenu. Select this menu

with the following procedure:

1. Press ^Shift, then Spec Anl (Scope) to go to the SCOPE screen.

2. Select the Controlsfield, then choose Triggerfrom the list of

choices.

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Utility Procedures

Oscilloscope

Usin g t h e Ma r k er

The marker is used to help you make measurements with the

oscilloscope. By repositioning the marker, you can measure the level

and time.

The Marker is controlled using the Markermenu. Select this menu

with the following procedure:

1. Press ^Shift, then Spec Anl (Scope) to go to the SCOPE screen.

2. Select the Controlsfield, the choose Markerfrom the list of

choices.

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Utility Procedures

Online Help

On lin e H elp

The Test Set contains help screens which briefly identify the most

commonly used features of the Test Set.

Access the help screens by pressing the ^Helpkey. Use the knob to select

the Help Topic of interest.

Pressing the ^Prevkey allows you to switch between the HELP screen

and the previous screen you had accessed. This is particularly useful

when you are following a procedure described in the HELP screen.

H elp Scr een Disp la y

F igu r e 3-3

H elp Scr e en Disp la y

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Utility Procedures

Ports: HP-IB, Serial and Parallel

P or ts: H P -IB, Ser ia l a n d P a r a llel

There are three types of data ports on the Test Set: HP-IB, Serial, and

Parallel. They each have specific purposes.

HP -IB P or t

This port is provided on the Test Set for IEEE 488.2 communications. It

is used to control the Test Set with an external IBASIC controller, or to

control other HP-IB equipped devices.

This port can be used with an external programming device when

writing programs, although it is also common to program the Test Set

using a serial port.

The default address of the HP-IB port is 14. This is commonly used in

IBASIC programs. An example command providing output to the port is

OUTP UT 714;”*R ST”, which presets the Test Set.

It has two modes, which correspond to modes useful when

programming the Test Set. Talk&Listnis the normal mode. Use

Controlonly when you need to control HP-IB instruments external to

the Test Set.

Con t r ollin g t h e HP -IB P or t

1. Press Shift, then the Inst Config (I/O Config) key to display the I/O

CONFIGURE screen.

2. Set the address of the HP-IB port with the HP-IB Adrsfield.

3. Use the Modefield to set the mode to either Talk&Listnor

Control.

Ser ia l P or t s

Three serial ports are available on the Test Set. Port 9 is used for

printing, IBASIC control and data communications. Serial ports 10 and

11 are used only for data communications from IBASIC.

Con figu r in g Ser ia l P or ts

All serial ports are configured via the I/O CONFIGURE screen. Baud

Rate, Parity, Data Length, Stop Length and Flow Control are all

configured in this screen. Additionally, port 9 can be configured for

IBASIC control in this screen.

1. Press ^Shift, then Inst Config (I/O Config) to go to the I/O CONFIGURE

screen.

2. Select Serial Portto choose the port you want to configure.

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Utility Procedures

Ports: HP-IB, Serial and Parallel

3. Change the settings for the port as desired.

NOTE

Do not turn Flow Control on (set Flow Cntlto “Hardware” in the I/O

CONFIGURE screen) for the serial port until you have a device

attached to the port that can respond to the flow control

communications.

Example: Assume you have a printer attached to Serial Port 9. Power is

off to the printer. Before you start to run any IBASIC software (for

example, the RFTOOLS program), youmust make sure the printer is

attached and power is on to the printer.

Usin g Ser ia l P or ts for P r in t in g

Serial Port 9 is the only serial port that can be used for printing. See

“P rinting” o n p a g e 61.

1. If you want to change the serial port configuration, see “C onfiguring

Serial Port 9 for IBASIC Communications” on page 59. It is not

necessary to change the Serial_9 Infield.

2. Press ^Shift, then Print (Printer Config) to display the PRINTER

CONFIGURE screen.

3. Select Printer Port. Choose Serial 9to direct the output to

Serial Port 9.

4. Press ^Printto print the currently displayed screen.

Con figu r in g Ser ia l P or t 9 for IBASIC Com m u n ica t ion s

The internal connection to Serial Port 9 is controlled in the I/O

CONFIGURE screen. The port has two purposes with IBASIC:

• Inst: Serial Port 9 is connected to a terminal (e.g. a PC running

Windows Terminal program). IBASIC commands are input from the

terminal and are used to control the Test Set.

• IBASIC: Serial Port 9 is connected to a device that can communicate

with an IBASIC program already running inside the Test Set.

Typically used for input/output to a PC or other device.

1. Press ^Shift, then Inst Config (I/O Config) to go to the I/O CONFIGURE

screen.

2. Select Serial_9 Into toggle between Instand IBASIC.

Con figu r in g Ser ia l P or ts 10 a n d 11

Serial Ports 10 and 11 are only configured via IBASIC commands. See

the Progra mmer’s Guide for commands which control these ports.

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Utility Procedures

Ports: HP-IB, Serial and Parallel

P a r a llel P or t s

There are two parallel ports on the Test Set.

Parallel Port 15 is the only parallel port that can be used for printing. It

can be selected in the PRINTER CONFIGURATION screen.

Both parallel ports (Port 15 and Port 16) may be used for controlling a

base station. The port can be put in an input or an output mode. The

data is then written or read under IBASIC control. When in either of

these modes, the printing function on Parallel Port 15 is disabled.

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Utility Procedures

Printing

P r in tin g

You can print from the Test Set via Parallel Port 15, Serial Port 9, or

the HP-IB port.

Note that data collection is not the same as printing. Data collection

can only be done from a software program.

Con figu r in g th e Test Set for P r in t in g

1. Press Shift, then Print (Printer Config) to display the PRINTER

CONFIGURE screen.

2. Select the Modelfield and choose the printer that most closely

matches your printer.

3. Select the Printer Portfield and choose the port you will connect

the printer to. If necessary, use the I/O CONFIGURE screen to set

up addresses and communication modes.

a. SERIAL PORT 9: This is the uppermost serial port. Configuration

defaults are 9600, none, 8, 1, Xon/Xoff.

b. HP-IB: The HP-IB address (HP-IB Adrs) is set to printer address

701. Enter this number as 01. Set Mode to CONTROL. (The

default address 14 is reserved for an external controller.)

c. PARALLEL PORT: There are two ports available. Port 15 (the

printer port) is the uppermost port.

4. Connect the proper cable to the connector you selected.

•

SERIAL PORT: standard NULL MODEM cable.

HP-IB: HP-IB cable (such as HP 10833B)

PARALLEL PORT: parallel cable

5. Change the FF(form feed) and Lines/Pageas needed.

P r in t in g a Scr een

1. Configure the Test Set for Printing.

2. Go to the screen you want to print.

3. Press the ^Holdkey if you want to temporarily stop the measurement.

(Optional).

4. Press the ^Printkey. Data will be sent to the printer.

5. To cancel the print, go to the PRINTER CONFIGURE screen and

select Abort Print.

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Utility Procedures

Measuring Swept Return Loss

Mea su r in g Sw ep t R etu r n Loss

This procedure measures the return loss (VSWR) of an antenna using

an IBASIC program that is in the Test Set’s memory. An external

directional bridge must be provided (such as an Eagle RLB 150X5

Option N5A or equivalent).

Press the ^Menukey to access the SOFTWARE MENU screen, and follow

the instructions illustrated on the following pages.

F igu r e 3-4

Loa d in g a n d R u n n in g t h e R e tu r n Loss P r ogr a m

Select R OM.

Select R F TOOLS.

Select R u n Test.

Use the knob to move the cursor and

select Sw e p t R etu r n Loss.

(Next Page)

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Utility Procedures

Measuring Swept Return Loss

F igu r e 3-5

E n t er in g Sw ep t R e tu r n Loss Mea su r em e n t In for m a tion

Enter the St a r t and Stop F r e qu en cy

values for the measurement.

The Ma x exp ect ed loss value is used to

determine the graphics scaling when the

measurement is displayed.

The DUP LE X OUT level is adjustable

to reduce the RF level used when mea-

suring the loss of sensitive devices, and

to minimize the amount of transmitted

power during the test (if necessary).

Select Be gin Tst (^k1) to continue.

F igu r e 3-6

Sw e p t R et u r n Loss Mea su r e m en t Con n ection s

Two 6 dB attenuators (pads), two short

cables, and the return loss bridge are

used to establish a calibration refer-

ence w it h ou t th e d evice u n d er te st

con n ecte d . Press P r ocee d (^k1) to con-

tinue.

As indicated by the NOTE on the

drawing, your return loss bridge may

be marked differently than shown.

When measuring the swept return loss

of a transmission line that is not ter-

minated at an antenna, terminate the

line into a 50Ω load.

After connecting your device under

test, press P r ocee d (^k1) to make the

measurement.

Device under test

Termination

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Utility Procedures

Measuring Swept Return Loss

The plot in F i gure 3-7 is for a cellular band antenna, swept from

800 MHz to 999 MHz. The plot (and the text above it) indicates that the

maximum return loss is at 885.4 MHz. This is the point where the

antenna is radiating the maximum amount of signal being fed into it

from the return loss bridge, and therefore the Test Set is receiving the

least amount of reflected (returned) energy back.

F igu r e 3-7

Sw ep t R e tu r n Loss Mea su r em e n t R esu lt s

P r oce ed to the run the

test again or to select a

different test.

Sa ve P lot to an

initialized writeable PC

card. (See "Me m o r y

Cards" on page 52.)

Perform a Scr een

Du m p to print the screen

to a connected printer.

(See "P rinting" on page

61.)

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Utility Procedures

Tracking Generator

Tr a ck in g Gen er a tor

The tracking generator is typically used for measuring return loss and

insertion loss. It also allows for quick and accurate characterization of

filters, duplexers, combiners, and RF to IF conversions. Broadband RF

devices can be characterized with single sweeps due to the full-span

sweep capability to 1 GHz. The tracking generator also includes

amplitude and frequency offset. Output from the tracking generator are

provided at either the RF IN/OUT or DUPLEX OUT connector.

Usin g t h e Tr a ck in g Gen er a t or

To measure return loss, see "Measuring Swept Return Loss" on page 62.

To measure insertion loss, see "M easuring Insertion Losses" on page 51.

Features of the tracking generator are listed below.

•

Sweep: the start and stop frequencies of the sweep are determined

by the spectrum analyzer’s Mainmenu. The Spandetermines the

band, and Center Freqdefines the midpoint of the sweep.

• Offset Freq: sets the difference between the instantaneous

frequency of the tracking generator and the center frequency of the

spectrum analyzer. This value can be positive or negative.

• Amplitude: sets the amplitude of the signal.

• Norm/Invert: With Norm, the tracking generator sweeps from low

to high frequencies. With Invert, it sweeps from high to low

frequencies.

NOTE

The offset function is useful when looking at frequency translating

devices, or anytime you need to sweep around a frequency while

analyzing another. During normal operation, offset is set to 0.00.

F igu r e 3-8

Sp e ct r u m An a lyzer w ith Tr a ck in g Gen er a tor Con tr ols

Disp la yed

Tracking

Generator

Controls

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Utility Procedures

User Keys

User keys instantly access instrument settings without using the knob.

You can use user keys to move quickly between fields on the same

screen, and to access field settings that are not normally available on

the screen you are using. When the user key is pressed, the cursor

instantly moves to, and selects, the assigned field.

Global user keys are used to access settings that are not available on

the current screen. Three global user keys are available: k1’, k2’, and

k3’. (To use one of these keys, press ^Shift, then k1, k2, or k3.)

Local user keys are used to move between settings on the screen that is

currently displayed. Five local user keys are available for each screen:

k1, k2, k3, k4, and k5. You can assign these keys yourself, or use the

factory preset assignments.

Disp la yin g t h e P r e-a ssign ed Loca l User Keys

1. Press the Shift key.

2. Press the ^k4(Assign) key.

3. Press ^Enter. Now the factory preset keys are displayed.

Assign in g a Loca l User Key

1. Move the cursor to the field you want to assign to a user key.

2. Press the ^Shiftkey.

3. Press the ^k4(Assign) key.

4. Press the user key you want to assign to the field you chose. The

number of the user key will appear beside the field when you move

the cursor.

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Utility Procedures

User Keys

Assign in g a Glob a l User Key

1. Move the cursor to the field you want to assign to a user key.

2. Press the ^Shiftkey.

3. Press the ^k4(Assign) key.

4. Press the ^Shiftkey.

5. Press the user key you want to assign to the field you chose (^k1, k2, or

k3). Global user keys are indicated as k1’, k2’, and k3’ on the front

panel to indicate that they are shifted functions. The number of the

user key does not appear beside the field when using global user

keys.

To R elea se a User Key Assign m en t

Perform the same procedure for assigning a key, but instead of pressing

the k4 (Assign) key, press the k5 (Release) key.

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Utility Procedures

Using Channel Numbers to Set Analyzer and Generator Frequencies

Usin g Ch a n n el Nu m b er s to Set An a lyzer a n d Gen er a t or

F r eq u en cies

RF analyzer and RF generator frequencies can be entered by channel

number (the default setting) or by discrete frequencies (in MHz). The

RF Displayfield on the INSTRUMENT CONFIGURE screen controls

which way frequencies are entered. This screen is accessed by pressing

the ^{Inst Config}key.

If the RF Displayfield is set to Chanfor channel tuning, you also need

to set the RF Chan Stdfield to LS AMPSto tell the Test Set you are

testing Land (base) Station AMPS radios. This automatically sets the

correct 45 MHz frequency offset needed to generate reverse channel

signals and analyze forward channel signals for an AMPS base station.

If you do not know the channel number of your base station, but know

the transmit and receive frequencies, set the RF Displayfield to Freq.

You can then enter these frequencies directly for the RF generator and

RF analyzer during tests.

F igu r e 3-9

Con figu r a t ion to Use Ch a n n el Nu m ber s for R F Ge n er a tor a n d

An a lyze r Set tin gs

Set the R F Disp la y field to Ch a n

to turn on channel tuning.

Select the R F Ch a n Std field to dis-

play a list of system types.....

..and then select LS AMP S for testing

AMPS base stations.

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Utility Procedures

Using Channel Numbers to Set Analyzer and Generator Frequencies

R F Ch a n a n d Tu n e F r eq F ield s

NOTE

All of the test procedures in this document assume you are using

channel tuning. If you are using frequency tuning, enter the frequency

in the appropriate field(s).

When you use ch a n n el t u n in g, the RF ANALYZER and RF

GENERATOR screens displays an RF Channelfield for entering the

channel to tune to or generate.

When you use fr eq u en cy t u n in g, the RF ANALYZER screen replaces

the RF Channelfield with the Tune Freqfield for direct frequency

entry. The RF GENERATOR screen replaces the RF Channelfield

with the RF Gen Freqfield. For AMPS Base Station tests, remember

that there should always be a 45 MHz separation between the transmit

and receive frequencies (transmit frequency is 45 MHz greater than the

receive frequency).

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Utility Procedures

Voltmeter

Volt m et er

A voltmeter is available in the Test Set, and can measure low level dc or

ac voltages. The input to the voltmeter is controlled by the AF Anl In

field in the AF ANALYZER screen.

CAUTION

Do not exceed the rated input to the Test Set for the DC Leveland

AC Levelmeasurements.

The connector best suited to making ac Level and dc Level

measurements is the AUDIO IN port.

Mea su r in g AC Level a n d DC Level

1. Press Shift, then RF Anl (AF Anl) to go to the AF ANALYZER screen.

2. Select AF Anl Inand choose Audio In.

3. Select Audio In Loand choose Gnd. This sets the AUDIO IN LO

port to ground, which allows you to measure voltage at the AUDIO

IN HI port.

4. Attach a probe (for example a 1:1 oscilloscope probe) to the AUDIO

IN HI connector.

5. AC Levelis displayed. To change to DC Level, select the AF Freq

measurement and choose DC Levelfrom the displayed list of

choices.

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In d ex

AC level

^{Base Station connections}, 32

cable losses

^measuring, 70

batteries

^compensating, 33

AC volts

^replacing, 18

cables

^measuring, 70

AF Anl Input

^field, 54

^beeper, 50

^{for printing}, 61

^HP-IB, 61

^{Null Modem}, 61

calibration

^{AF connections}, 32

AMPS Base Stations

^{manual testing}, 29

^{AMPS testing}, 18

AMPS tests

^{Assembly Level Repair Manual},

^{when you change a module}, 22

call center

^{receiver sensitivity (SINAD)}, 42

^{receiver squelch threshold}, 45

^{transmitter data deviation}, 38

transmitter frequency

^{error/offset and power}, 34

transmitter maximum voice

^deviation, 40

^Europe, 19

^U.S., 19

^{Canada HP Direct}, 19

CD-ROM

^{documentation}, 20

^{Cell Band CDMA testing}, 18

^{change battery procedure}, 18

channel numbers

using, to set analyzer and

^{generator frequencies}, 68

^{congratulations}, 27

connections

transmitter SAT frequency and

^deviation, 36

^{AMPS Tests listed}, 30

analyzer and generator

frequencies

^{using channel numbers}, 68

^{Analyzing FM Carrier}, 26

ANT IN port

^{base station}, 32

^{FM Loopback test}, 23

^{conventions used in his manual},

^overpower, 30

^{Antenna In field}, 33

ANTENNA IN port

^losses, 33

Assembly Level Repair Manual

^calibration, 22

^{assigning global user keys}, 67

^{assigning local user keys}, 66

^{AUDIO IN port}, 32

^{AUDIO OUT port}, 32

^{automatic operation}, 21

^{Available AMPS tests}, 30

Index

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In d ex

^{Data Deviation test}, 38

DC level

entering test system losses and

^gains, 33

fields

^selecting, 24

^measuring, 70

^{European Call Center}, 19

FM Carrier

DC volts

^analyzing, 26

^measuring, 70

^displaying, 26

^{FM Loopback test}, 23

FM Signal

^{Displaying an FM Carrier}, 26

^{Duplex Out field}, 33

^{DUPLEX OUT port}, 32

^losses, 33

^displaying, 23

FM signal

^overpower, 30

^generating, 24

frequencies

^{setting analyzer and generator},

^{Frequency Error test}, 34

Index

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In d ex

^{generating an FM signal}, 24

help

^{IBASIC Programs}, 21

^{in this manual}, 15

INSTRUMENT CONFIGURE

^screen, 33

^{Getting Help}, 19

^{how to get}, 19

^{Getting Started}, 17

^{global user keys}, 66

^assigning, 67

^online, 57

^{screen display}, 57

hot keys

^releasing, 67

^setting, 66

HP Direct

^Canada, 19

^Korea, 19

HP-IB communications

^{via the serial port}, 59

HP-IB controller

^{internal to the Test Set}, 21

HP-IB port

^controlling, 58

^modes, 58

Index

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In d ex

k1, k2, k3, k4, k5

^{local user keys}, 66

k1’, k2’, k3’

^{local user keys}, 66

^assigning, 66

^preassigned, 66

^{manual operation}, 21

manual testing

^{AMPS base stations}, 29

maximizing measurement

^accuracy, 22

^{global user keys}, 66

^releasing, 67

knob

^{Loopback Test}, 23

^using, 24

measurement accuracy

^maximizing, 22

^{Korea HP Direct}, 19

^{measurement port}, 30

^{measuring path losses and gains},

^{memory cards}, 52

^{modes of the Test Set}, 21

Index

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In d ex

^oscilloscope, 53

^features, 53

^{filters and inputs}, 53

parallel port

RAM

^{input and output modes}, 60

^{ports 15 and 16}, 60

^{path losses}, 33

^{backing up}, 18

^{read me first}, 31

^marker, 56

^{Receiver Sensitivity test}, 42

^{recevier squelch threshold}, 45

^{return loss}, 62

^{selecting the filters}, 54

^{selecting the input}, 54

^triggering, 55

^measuring, 31

^{PCMCIA card}, 52

^{Flash ROM}, 52

^{RF connections}, 32

^{RF In/Out field}, 33

^{RF IN/OUT port}, 32

^losses, 33

^initializing, 52

^OTP, 52

^SRAM, 52

^{PCS CDMA testing}, 18

^{measuring power}, 30

port

^overpower, 30

^HP-IB, 58

^{RF Level Offset field}, 33

^{HP-IB, serial, parallel}, 58

^{measuring AC or DC level}, 70

^{printing via the serial port}, 59

^serial, 58

Power

^{measurement port}, 30

^{Power calibration/compensation},

^{preassigned local user keys}, 66

^printing, 61

^{and data collection}, 61

^cables, 61

^{configuring the Test Set}, 61

^{FF (Form Feed)}, 61

^{how to print a screen}, 61

^HP-IB, 61

^{lines per page}, 61

^{parallel port}, 61

^ports, 61

^{serial port 9}, 61

^{via the serial port}, 59

probe

^{measuring AC or DC level}, 70

^{Product Description}, 18

^{Programmer’s Guide}, 21

^{purchased software}, 21

Index

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In d ex

^{sales offices}, 19

temperature compensation

^{Pwr Zero}, 22

^{U.S. Call Center}, 19

user keys

^{SAT Deviation test}, 36

^{SAT Frequency test}, 36

^{test interface connections}, 32

^global, 66

screens

Test Set

^local, 66

^selecting, 24

^{documents included}, 20

^{what’s in the box}, 20

tips for selecting screens and

^fields, 24

^releasing, 67

^setting, 66

^{serial port}, 58

^configuring, 58

^{Utility Procedures}, 49

configuring for HP-IB

^{communications}, 59

port 9, configuring for HP-IB

^{communications}, 59

^{port 9, configuring for printing},

^{TMO web site}, 19

^{tools contained in the Test Set}, 18

^{tracking generator}, 65

^{controls display}, 65

^{offset frequency}, 65

^using, 65

^{ports 10 and 11}, 59

^{using for printing}, 59

signal losses and gains

^compensating, 33

^{SINAD test}, 42

software

^{TX Power}, 30

^{TX Power test}, 34

^{manufacturer-specific}, 21

^purchased, 21

^{Spectrum Analyzer}, 26

^{squelch threshold}, 45

SRAM card

^initializing, 52

systems

^AMPS, 18

^CDMA, 18

^{PCS CDMA}, 18

Index

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In d ex

^{Voice Deviation (max) test}, 40

web site

^TMO, 19

^voltmeter, 70

^connector, 70

^{what to do next}, 27

What’s Included with this Test

^Set, 20

volume

^{controlling beeper}, 50

^{www.tmo.hp.com}, 19

Index

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