An IQ System® Programmable Input Processor with DSP
for Crown® P.I.P.®-compatible Power Amplifiers
©1999 by Crown International, Inc., P.O. Box 1000, Elkhart, Indiana 46515-1000 U.S.A. Telephone: 219-
294-8000. The IQ–P.I.P.–DSP is produced by Crown International, Inc. Trademark Notice: MPX-6™, SMX-
6™, SmartAmp™ and Macro Reference™ are trademarks and Amcron®, Crown®, IQ System®, IOC®, ODEP®,
Macro-Tech®, Com-Tech® and P.I.P.® are registered trademarks of Crown International, Inc. Other
trademarks are the property of their respective owners.
Printed on
recycled paper.
103291-2
9/99
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IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems
Im p o r t a n t Sa fe t y In st r u ct io n s
1) Read these instructions.
2) Keep these instructions.
3) Heed all warnings.
4) Follow all instructions.
5) Do not use this apparatus near water.
6) Clean only with a damp cloth.
7) Do not block any of the ventilation openings. Install
in accordance with the manufacturer’s instructions.
8) Do not install near any heat sources such as radia-
tors, heat registers, stoves, or other apparatus that
produce heat.
9) Do not defeat the safety purpose of the polarized or
grounding-type plug. A polarized plug has two
blades with one wider than the other. A grounding-
type plug has two blades and a third grounding
prong. The wide blade or the third prong is provided
for your safety. When the provided plug does not fit
into your outlet, consult an electrician for replace-
ment of the obsolete outlet.
10) Protect the power cord from being walked on or
pinched, particularly at plugs, convenience recep-
tacles, and the point where they exit from the appa-
ratus.
11) Only use attachments/accessories specified by the
manufacturer.
12) Use only with a cart, stand, bracket, or table speci-
fied by the manufacturer, or sold with the apparatus.
When a cart is used, use caution when moving the
cart/apparatus combination to avoid injury from tip-
over.
13) Unplug this apparatus during lightning storms or
when unused for long periods of time.
14) Refer all servicing to qualified service personnel.
Servicing is required when the apparatus has been
damaged in any way, such as power-supply cord or
plug is damaged, liquid has been spilled or objects
have fallen into the apparatus, the apparatus has
been exposed to rain or moisture, does not operate
normally, or has been dropped.
Reference Manual
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The information furnished in this manual does not include all of the details of design, production, or variations of
the equipment. Nor does it cover every possible situation which may arise during installation, operation or
maintenance. If you need special assistance beyond the scope of this manual, please contact our Technical
Support Group.
Crown Audio Division Technical Support Group
Plant 2 SW, 1718 W. Mishawaka Rd., Elkhart, Indiana 46517 U.S.A.
Phone: 800-342-6939 (North America, Puerto Rico and Virgin Islands) or 219-294-8200
Fax: 219-294-8301 Fax Back (North America only): 800-294-4094 or 219-293-9200
WARNING
TO REDUCE THE RISK OF ELECTRIC
SHOCK, DO NOT EXPOSE THIS
EQUIPMENT TO RAIN OR MOISTURE!
FCC COMPLIANCE NOTICE
This equipment has been tested and found
to comply with the limits for a Class A digital
Device, pursuant to Part 15 of the FCC
Rules. These limits are designed to provide
reasonable protection against harmful
interference when the equipment is
operatedinacommercialenvironment. This
equipment generates, uses and can radiate
radio frequency energy and, if not installed
and used in accordance with the instruction
manual, may cause harmful interference to
radio communications. Operation of this
equipment in a residential area is likely to
causeharmfulinterferenceinwhichcasethe
user will be required to correct the
interference at his own expense.
“The user is cautioned that any changes or
modifications not expressly approved by
Crown International could void the user’s
authority to operate the equipment.”
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IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems
Quick Install Procedure
This procedure is provided for those who are already familiar with Crown’s IQ System
and who would like to install the IQ–P.I.P.–DSP in the shortest time possible. Less
experienced installers or those wishing a full explanation of the installation procedure
are encouraged to go to Section 4 where the full installation procedure is described.
Prepare the IQ–P.I.P.–DSP:
1. Set the IQ address switch SW1 (Figures 4.1 and 4.2) on the IQ–P.I.P.–DSP to an unused
IQ address. (Tip: Record the IQ address on the small blank label that is provided on
lower right corner of the P.I.P. panel.)
2. Set jumpers JP4 and JP5. Set both jumper JP4 and JP5 to the “OUT” position if either a
PIP2-compatible or Macro-Tech 5000VZ amplifier will be used (Figures 2.1 and 4.7).
Both JP4 and JP5 should be set to the “IN” position for all other amplifiers.
Prepare the amplifier:
3. Turn down the level controls of the amplifier and turn off the amplifier.
4. Unplug the power cord of the amplifier from the AC mains.
5. Remove the existing P.I.P. or cover panel from the amplifier back panel (two screws).
6. Set the amplifier input sensitivity switch to 0.775 V. (See the Reference or Owner’s
Manual of the amplifier.)
Install the IQ–P.I.P.–DSP into the amplifier:
7. Carefully ground yourself to the chassis of the amplifier before installing the IQ–P.I.P.–
DSP. It is a good idea to maintain ground contact between yourself and the amplifier
while inserting the module into the P.I.P. card rails in the next step.
8. Install the IQ–P.I.P.–DSP into the amplifier:
Standard P.I.P. Amplifiers: Align the edges of the IQ–P.I.P.–DSP in the P.I.P. card rails
and firmly push the unit in until it is seated against the mounting bracket (Figure 4.4).
PIP2 Compatible Amplifiers: Connect the PIP2 input adapter to the amplifier input
cables. Plug the IQ–P.I.P.–DSP into the PIP2 input adapter and insert the assembly into
the P.I.P. opening in the back of the amplifier (Figures 4.5 and 4.6).
9. Tighten the two P.I.P. mounting screws until it is secured to the amplifier back panel.
Install the wiring:
10. Connect the IQ–P.I.P.–DSP to the IQ System via the Crown Bus (see Section 4.6 if more
information is needed).
11. Connect the audio signal wiring to the IQ–P.I.P.–DSP. This includes the XLR input wiring
and the phone jack daisy chain wiring—if desired (see Section 4.7 if more information is
needed). Note: FCC and EC EMI regulations require that the EMI suppression core
provided with this P.I.P. be installed on the daisy chain cables, if used.
12. Connect the amplifier back to the AC receptacle. Note: The IQ–P.I.P.–DSP may require
an external power supply in some amplifiers. See Section 4.8 for more information.
Adjust the levels and scale factors:
13. Turn the level controls of the amplifier to their full setting. Use the software-controlled
input attenuators on the IQ–P.I.P.–DSP to adjust the input levels down.
14. Standard P.I.P. Amplifiers: Manually configure the scaling factors of the IQ–P.I.P.–DSP
with appropriate IQ System software.
PIP2 Compatible Amplifiers: The scaling factors will be automatically set.
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IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems
CONTENTS
Quick Install Procedure .......................................... 5
4.17 Excessive ODEP Warning ............................. 18
4.18 Fault Warning ................................................ 18
4.19 Signal Delay.................................................. 18
4.20 Programmable Filters .................................... 18
4.21 Memory Backup ........................................... 20
4.22 Amp Mode .................................................... 20
4.23 Amplifier Information ....................................... 2
4.24 IQ2 Protocol Support .................................... 20
4.25 Crown Bus “Drop Out” Relays....................... 20
4.26 Data Signal Presence Indicator..................... 20
4.27 Reset 20
4.28 User Default Settings .................................... 20
Technical Information ........................................... 21
5.1 Audio Signals................................................ 21
5.1.1 Hardware Processing .......................... 21
5.1.2 Signal Flow Processing ....................... 21
5.2 Control/Monitor Functions ............................. 22
5.2.1 Audio Signals...................................... 22
5.2.2 Status Signals ..................................... 22
5.2.3 DSPI Control ....................................... 22
5.3 IQ System Communications .......................... 22
5.4 Microprocessor and Reset Switch................. 22
Specifications ....................................................... 23
IQ Address Tables................................................. 24
Service................................................................... 26
8.1 Worldwide Service ........................................ 26
8.2 North American Service ................................ 26
8.2.1 Service at a N. American Ser. Center .. 26
8.2.2 Factory Service ................................... 26
1
Welcome .................................................................. 7
1.1 Unpacking ...................................................... 7
Facilities .................................................................. 8
Installation............................................................. 10
3.1 Prepare the IQ–P.I.P.–DSP ............................. 10
3.2 Prepare the Amplifier .................................... 11
3.3 Install the IQ–P.I.P.–DSP into the Amplifier ..... 11
3.4 Install the Wiring ........................................... 11
3.5 Adjust the Levels & Scale Factors ................. 12
3.6 A Closer Look at Crown Bus Wiring .............. 12
3.7 A Closer Look at Audio Signal Wiring ............ 14
3.8 When External Power is Needed ................... 14
Operation .............................................................. 15
4.1 Power/Standby Indicators ............................. 15
4.2 IOC Event Monitor......................................... 15
4.3 Input Signal Level Monitor............................. 14
4.4 Output Signal Level Monitor .......................... 14
4.5 ODEP Level Monitor...................................... 14
4.6 Power Control ............................................... 14
4.7 Signal Mute ................................................... 14
4.8 Polarity Inverter ............................................. 16
4.9 Input Signal Attenuator ................................. 16
4.10 Input Protection Limiter ................................. 16
4.11 Auto ........................................................... 16
4.12 Input Signal Compressor/Limiter ................... 16
4.13 Smooth/Output Signal Limiter ....................... 16
4.14 Auto Standby ................................................ 17
4.15 ODEP Limiter ................................................ 17
4.16 Excessive IOC Warning ................................ 17
2
3
5
4
6
7
8
ILLUSTRATIONS
1.1
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
IQ–P.I.P.–DSP .............................................................................................................................................................7
IQ Address Switch (SW1) Location ..........................................................................................................................10
IQ Address Switch (SW1) Values ............................................................................................................................. 10
Installation into a Standard P.I.P. Amplifier ................................................................................................................ 11
PIP2 Input Adapter Connection ................................................................................................................................11
Installation into a PIP2 Amplifier ...............................................................................................................................11
Amplifier Scale Factor Values and Output Signal Pad Settings................................................................................. 12
IQ–P.I.P.–DSP Output toIQ Component with DIN ......................................................................................................13
IQ–P.I.P.–DSP Output to IQ Component w/ Screw Terminal Plug ..............................................................................13
IQ Component with Screw Terminal Plug to the IQ–P.I.P.–DSP Input .........................................................................13
3.10 Crown Bus Wiring “Loops” from Output to Input.......................................................................................................13
3.11 Audio Input Wiring ................................................................................................................................................... 14
3.12 Audio Output Wiring .................................................................................................................................................14
5.1
5.2
7.1
7.2
IQ–P.I.P.–DSP Hardware Circuit Block Diagram ........................................................................................................21
IQ–P.I.P.–DSP Audio Signal Flow Block Diagram ......................................................................................................22
IQ Address Switch (SW1) Settings from 0 to 125 ......................................................................................................24
IQ Address Switch (SW1) Settings from 126 to 250 ..................................................................................................25
Page 6
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IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems
Fig. 1.1 IQ–P.I.P.–DSP
1 Welcome
The IQ–P.I.P.–DSP is a powerful IQ component that con-
nects an IQ-compatible amplifier to the Crown Bus of
an IQ System so the amplifier can be controlled and
monitored. Its DSP (digital signal processing) capabili-
ties enable it to offer a variety of programmable func-
tions, such as filters and crossovers, signal delay, input
compressor and output limiter and a variety of other
useful features similar to those included with our other
SmartAmp™ IQ P.I.P.s. The module is powered by the
amplifier (an external AC power adapter may be re-
quired with certain amplifiers).
This manual will help you successfully install your unit.
We strongly recommend you read all the instructions,
warnings and cautions contained within. Also for your
protection, please send in the warranty registration card
today and save the bill of sale since it is your official
proof of purchase.
The IQ–P.I.P.–DSP is a PIP2 input module for Crown
P.I.P.® (programmable input processor) and PIP2-com-
patible amplifiers. Because it is also an IQ2-series com-
ponent, it supports Crown’s UCODE protocol and
requires an IQ System® with an IQ2-compatible IQ in-
terface. UCODE (universal code) enables users and
third parties to develop custom software objects to con-
trol and monitor IQ2-compatible components like the
IQ–P.I.P.–DSP.
1.1 Unpacking
The unit is shipped in a protective antistatic bag.
CAUTION: STATIC ELECTRICITY MAY DAMAGE
THE UNIT. Use caution when handling the unit.
Carefully ground yourself BEFORE touching the unit.
For added safety, touch the outer metal collar of either
Crown Bus connector. Avoid unnecessarily touching
the components, edge connector or solder pads on
the circuit boards.
To ensure fast and accurate processing, the IQ–P.I.P.-
DSP features two separate onboard processors. A
Motorola 6811 microprocessor inside the P.I.P. over-
sees communication with the IQ System and most
SmartAmp features (similar to an IQ–P.I.P.–SMT). A
Motorola 56002 microprocessor handles all digital sig-
nal processing.
Please unpack and inspect the unit for any damage
that may have occurred during transit. If damage is
found, notify the transportation company immediately.
Only you, the consignee, may initiate a claim with the
carrier for shipping damage. Crown will be happy to
cooperate fully as needed. Save the shipping carton
as evidence of damage for the shipper’s inspection.
Each IQ–P.I.P.–DSP is easy to install and includes an IQ
address switch, allowing the unit to have a unique ad-
dress on the Crown Bus. Its error-tolerant design en-
ables it to automatically reset itself if noise “spikes” or
other disturbances are encountered.
Even if the unit arrived in perfect condition, as most do,
save all packing materials. NEVER SHIP THE UNIT
WITHOUT THE FACTORY PACK.
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IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems
D E
IN
OUT
DSPI
CROWN
BUS
-
DSP
P. I.P.
PUSH
PUSH
AUDIO OUT
Front View
CH-2
CH-1
TIP=
RING=
2
1
3
EXT. POWER INPUT
24 VDC/ 400 mA
GND
DSP#.###
CH-2 AUDIO IN CH-1
A
B
B
C
C
F G H
A
AVOID STATIC DAMAGE!
GROUND YOURSELF TO THE OUTER
METAL COLLAR OF ONE OF THE
CROWN BUS CONNECTORS.
Bottom View
K
N
RN1
M
L
JP4
JP5
RN2
CH1
CH2
I
J
J
K
Fig. 2.1 The IQ–P.I.P.–DSP Facilities
2 Facilities
A. Mounting Screws
The IQ–P.I.P.–DSP is secured to the back panel of the
amplifier with two phillips-head screws and star-tooth
lock washers. The lock washers are required for proper
ground connection.
inverted (–). Do not use the Ch.2 input if the amplifier is
configured in either Bridge or Parallel-Mono mode.
C. Balanced Audio Outputs
A balanced phone jack is provided at the output of
each channel for “daisy chain” connection to other
components. Either balanced (tip, ring, sleeve) or un-
balanced (tip, sleeve) wiring may be used. The audio
signal feeding these outputs is post-processed.
B. Balanced Audio Inputs
A 3-pin female XLR connector is provided for balanced
audio input to each channel of the amplifier. Pin 1 is
ground (gnd); pin 2 is not inverted (+); and pin 3 is
Page 8
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IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems
D. Reset Switch
H. Crown Bus Output Connector
A multifunction reset switch is provided to restore the
IQ–P.I.P.–DSP to a prior state. It can be depressed with
a straightened paper clip through the small hole in the
P.I.P. panel. Press the reset switch for less than 2 sec-
onds and all settings, except the amplifier model scale
factors, will be reset with “user default” parameters and
the Data LED will flash once. (If no “user default” set-
tings have been stored, the unit will be reset to the “fac-
tory default” settings described next.) Press the reset
switch for more than 2 seconds and the same settings
will be reset with “factory default” parameters and the
Data LED will flash twice. After the unit has been reset
to the factory default settings, it will behave like a stan-
dard P.I.P.-FX until it is reprogrammed by an IQ Sys-
tem or it is toggled to the “user default” settings.
A lockable 4-pin female DIN connector is used for output
connection to the Crown Bus. A mating Switchcraft 502
series connector can be ordered from Crown (part
C 7777-3). Pin 1 is negative (–) and pin 2 is positive (+).
Pins 3 and 4 are not used.
I. P.I.P. Edge Connector
The gold-plated edge connector of the top IQ circuit
board inserts into the P.I.P. connector inside the back
of the amplifier. Use care when installing a P.I.P. mod-
ule to be certain that the edge connector is properly
inserted into the amplifier’s P.I.P. connector.
J. Amplifier Output Pad Jumpers (JP4, JP5)
These jumpers enable the circuitry that pads the out-
put signal feeding the IQ–P.I.P.–DSP so it can be prop-
erly scaled. They should normally be set to the “IN”
position as marked on the digital circuit board. Use the
“OUT” position whenever the unit is installed into a
PIP2-compatible or Macro-Tech 5000VZ amplifier.
WARNING: Pressing the reset switch can cause the
IQ–P.I.P.–DSP to emit a brief pulse. We recommend
that the level controls of the amplifier be turned down
before pressing the reset switch.
E. Data Signal Presence Indicator (DSPI)
The Data Signal Presence Indicator (DSPI) is a Data
LED which flashes whenever a valid IQ command has
been received. The indicator can also be forced to stay
on to aid rapid troubleshooting of the Crown Bus wir-
ing.
K. PIP2 SIP Sockets (RN1, RN2)
These eight-pin SIP (single in-line package) sockets
are provided for full PIP2 compatibility. IQ-P.I.P.-DSP-
PIP2 modules (required for PIP2-compatible amplifiers)
should come with the SIP networks already installed.
The SIP networks are not required and should be ab-
sent on standard IQ-P.I.P.-DSP modules.
F. Crown Bus Input Connector
A lockable 5-pin female DIN connector is provided for
input connection to the Crown Bus. A mating
Switchcraft 502-series connector can be ordered from
Crown (part C 7776-5). Pin 1 is negative (–), pin 2 is
positive (+), and pin 3 is ground (gnd). Pins 4 and 5
are not used.
L. IQ Circuit Board (Top)
The top circuit board contains the IQ communication
and data acquisition circuitry, including the IQ address
switch (SW1), amplifier output pad jumpers (JP4, JP5),
PIP2 SIP sockets (RN1, RN2) and the P.I.P. edge con-
nector.
G. External Power Input
M. Audio Circuit Board (Bottom)
A mini jack is provided to receive power from an exter-
nal 24 VDC, 400 mA source. External power is not
needed when the IQ–P.I.P.–DSP is installed in a Macro-
Tech 5000VZ or 10,000, a Com-Tech, a Reference or a
PIP2-compatible amplifier. However, other Macro-Tech
models may require additional power for the IQ–P.I.P.–
DSP. An external 120 VAC power adapter (C 7926-6)
is available from Crown. See Section 3.8.
The bottom circuit board contains the audio analog and
digital signal processing circuitry.
N. IQ Address Switch (SW1)
An 8-section DIP (dual in-line package) switch is used
to set the IQ address of the unit (see Section 3.1). This
switch is located on the top circuit board. Each IQ com-
ponent on a Crown Bus is given a unique IQ address
so it can be independently controlled and monitored.
Two or more IQ components of the same type should
NEVER have the same address on the same Crown
Bus loop.
CAUTION: Use only an individual, isolated power sup-
ply for each IQ–P.I.P.–DSP. Do not attempt to share a
common power supply with more than one unit or the
IQ–P.I.P.–DSP modules may be damaged.
Reference Manual
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IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems
is used to set the IQ address of the IQ–P.I.P.–
DSP. No two IQ components of the same type
which are connected to the same Crown Bus
can have the same address. Suppose, for ex-
ample, an IQ System has two Crown Bus loops,
1 and 2, and this IQ–P.I.P.–DSP is to be installed
into loop 1 and given an address of 77. No other
IQ–P.I.P.–DSP can be given the same address in
loop 1. However, an IQ–P.I.P.–DSP in loop 2 can
have the same address.
3 Installation
Before beginning, please carefully note:
CAUTION: STATIC ELECTRICITY MAY DAMAGE
THE IQ–P.I.P.–DSP MODULE. Use caution when
handling the unit. Carefully ground yourself BEFORE
touching the IQ–P.I.P.–DSP module. For added safety,
touch the outer metal collar of either Crown Bus
connector (see Figure 2.1). This should safely
discharge any static electricity through the ground
plane of the module. Avoid unnecessarily touching the
components, edge connector or solder pads on the
circuit boards.
Different IQ components in the same Crown Bus
loop can have the same address. For example,
both an SMX-6 mixer and an IQ–P.I.P.–DSP can
use address 77 in the same loop.
NOTE — Amplifier Compatibility
A valid IQ address is any number from 1 to 250.
Do not use a number higher than 250 since they
are reserved for special use. An address of “0”
(zero) should never be used except to put the
IQ–P.I.P.–DSP into a stand-alone mode where it
is invisible to the IQ System and acts as a
The version of the IQ-P.I.P.-DSP card you received will
vary depending on whether you indicated the card will
be installed on a PIP2-compatible amplifier (such as
the Crown MA-5000VZ or CT-10 Series amplifiers). The
correct card to install in a PIP2-compatible amplifier is
the IQ-P.I.P.-DSP-PIP2. The standard IQ-P.I.P.-DSP
should be ordered for non-PIP2-compatible amplifiers.
Should you later wish to change the amplifier you are
using for your IQ-P.I.P.-DSP installation, it is possible to
alter the card's configuration by simply removing or
installing two SIPS from the card’s circuit boards1. For
instructions on installing or removing these SIPS,
contact Crown Technical Support.
ON
SW1
1 2 3 4 5 6 7 8
TOP VIEW
Fig. 3.2 IQ Address Switch (SW1) Values
“dumb” balanced audio input.
3.1 Prepare the IQ–P.I.P.–DSP
1. Set the IQ address switch SW1. By giving each
IQ component a unique address, it can be individu-
ally controlled and monitored. Whenever the IQ
System wants to send a command to just one IQ
component, it first sends its address and then the
SW1
Switch SW1 is located on the right side on the
underside of the top circuit board (Figure 3.1). It
has eight segments because it actually contains
eight tiny switches inside. There is an arrow
printed on the switch along its left side that
points to the “ON” position and the switches are
numbered along the bottom (Figure 3.2).
OUT
Each of the eight switches in SW1 has a value
which doubles as the switch number increases.
For example switch 1 has a value of 1; switch 2
has a value of 2; switch 3 has a value of 4; switch
4 has a value of 8 and so on.
CROWN
BUS
N
I
DSPI
T
U
O
IO
D
U
=
G
A
IN
R
PUSH
DSP#.###
DSP
-
T
=
U
P
TIP
IN
0
P.
R
.
I
E
0
W
D
A
O
V
m
-1
P.
PUSH
H
C
.
P
T
2
X
E
/ 4
C
4
-2
H
C
The address is determined by adding the values
of all “ON” switches. In Figure 3.2 switches 1, 3,
4 and 7 are on. Simply add the values to find the
address: 1+4+8+64=77.
CH-1
AUDIO IN
2
1
CH-2
D
N
3
G
Fig. 3.1 IQ Address Switch (SW1) Location
A convenient series of IQ address tables are in-
cluded in Section 7. The tables show the switch
command down the Crown Bus.
The 8-segment DIP switch (SW1) shown above
1IQ-P.I.P.-DSP-PIP2 has SIPS installed; IQ-P.I.P.-DSP has SIPS removed.
Page 10
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IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems
settings for all 250 addresses.
3.4). Notice that the PIP2 input adapter should
be positioned with the P.I.P. edge connector on
top facing away from the amplifier. The 20 pin
cable (A) is connected first then the 18 pin cable
2. Set the jumpers JP4 and JP5. If the IQ–P.I.P.–
DSP is being installed into a PIP2-compatible or
Macro-Tech 5000VZ amplifier, move both
jumper JP4 and JP5 on the IQ circuit board to
the “OUT” position (Figures 2.1 and 3.6). Set
both JP4 and JP5 to the “IN” position for all other
amplifiers.
FROM AMPLIFIER
PIP2 ADAPTER
B
A
18 PIN (B)
B
20 PIN (A)
3.2 Prepare the Amplifier
A
3. Turn down the level controls (full counter-
clockwise) and turn off the amplifier.
Fig. 3.4 PIP2 Input Adapter Connection
4. Disconnect the amplifier’s power cord.
(B) is connected. Both ribbon cables should ex-
tend below the PIP2 input adapter.
5. Remove the existing P.I.P. or cover panel from the
amplifier back panel (two screws). For PIP2 amplifi-
ers this may involve disconnecting the P.I.P. from a
PIP2 input adapter (Figure 3.4). If a PIP2 input
adapter is already present, do not remove the rib-
bon cables from the adapter. Otherwise you will
have to reconnect them in Step 9.
Next, insert the edge connector of the IQ–P.I.P.–
DSP into the PIP2 input adapter (see Figure 3.5)
BACK PANEL
OF PIP2
AMPLIFIER
PIP2 ADAPTER
6. Set the amplifier input sensitivity to 0.775 V.
(See the amplifier’s Reference Manual.)
.
.I.P
U
P
LE
D
O
M
3.3 Install the IQ–P.I.P.–DSP into the
Amplifier
7. Carefully ground yourself to the chassis of the
amplifier before installing the IQ–P.I.P.–DSP. It is
a good idea to maintain ground contact be-
tween yourself and the amplifier while inserting
the module into the P.I.P. card rails (standard
P.I.P.-compatible amplifiers) or the PIP2 connec-
tor (PIP2-compatible amplifiers).
Fig. 3.5 Installation into a PIP2 Amplifier
and insert the assembly into the P.I.P. opening in
the back of the amplifier.
9. Tighten the two P.I.P. mounting screws until
the P.I.P. is secured to the amplifier back panel.
8. Install the IQ–P.I.P.–DSP into the amplifier:
Standard P.I.P. Amplifiers: Align the edges of the
IQ–P.I.P.–DSP in the P.I.P. card rails and firmly
push the unit in until it is seated against the
mounting bracket (see Figure 3.3).
3.4 Install the Wiring
10. Connect the IQ–P.I.P.–DSP to the IQ System
via the Crown Bus. See Section 3.6 for full in-
structions.
PIP2 Amplifiers: Connect the PIP2 input adapter
to the two input cables of the amplifier (Figure
11. Connect the audio signal wiring to the IQ–
P.I.P.–DSP. This includes the XLR input wiring
and, if desired, the phone jack daisy chain wir-
ing. See Section 3.7 for full instructions. Note:
The supplied EMI suppression core must be
used on the daisy chain outputs for the IQ–P.I.P.–
DSP to comply with FCC and EC EMC regula-
tions (see Section 3.7).
BACK PANEL
OF AMPLIFIER
.
.I.P
P
MODULE
12. Connect the amplifier back to the AC recep-
tacle. Note: The IQ–P.I.P.–DSP may require an
external power supply in some amplifiers. See
Fig. 3.3 Installation into a Standard P.I.P. Amplifier
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IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems
Section 3.8 for more information.
loop having an IQ2-compatible IQ interface in order for
the IQ System to control or monitor it. The Crown Bus is
a serial communication loop designed to transmit IQ
commands and data. As implemented in the IQ–P.I.P.–
3.5 Adjust the Levels & Scale Factors
13. Turn the level controls of the amplifier to their
full or maximum setting. This is required by the
IQ–P.I.P.–DSP. If needed, use the software-con-
trolled input attenuators on the IQ–P.I.P.–DSP to re-
duce the audio levels.
DSP, it is a 20 milliamp current loop operating at a
BAUD rate of 38.4 K. The loop must be unbroken to
function properly.
If the system includes an IQ–INT II interface, it can ac-
cept eight different Crown Bus loops or zones. Dividing
the sound system into different zones, each with its own
Crown Bus loop, can have several advantages. The fol-
lowing list contrasts those advantages with those of a
single loop.
14. Configure the amplifier scale factors. (Standard
P.I.P.-compatible amplifiers only—the scale factors for
PIP2-compatible amplifiers are set automatically.) It is
necessary to configure software scale factors in the
microprocessor of the IQ–P.I.P.–DSP in order for it to
properly interpret the output signal level of the ampli-
fier model in which it is installed. This is easily done by
connecting a host computer to the IQ–P.I.P.–DSP via
an IQ interface and the Crown Bus and running the
appropriate software (see the IQ software User’s
Manual for details). In the appropriate input area of the
software, specify the amplifier model. The software
will then send the appropriate scale factors to the P.I.P.
Note that for some amplifiers, the scale factors will
also need to be specified by the user. When
prompted by the software, input the appropriate scale
factor. The scale factor values are listed in Figure 3.6
Multiloop Advantages
• A break in communication in one loop does not
affect other loops.
• Over 250 IQ components of the same type can
be used in a system.
• The same IQ address can be used more than
once (once per loop per model).
Single Loop Advantages (with IQ-INT II interfaces)
• The IQ System can send and retrieve data faster
in a single loop.
• “Real time” level display of a greater number of
units is possible.
Amplifier
Model
Scale Values (Decimal)
Output Signal Pads
(JP4, JP5)
Channel 1
Channel 2
The IQ–P.I.P.–DSP can be connected to the Crown Bus
with inexpensive twisted-pair wiring (shielded or
unshielded). If fiber optic wiring is required contact the
Crown Technical Support Group (see page 4).
Com-Tech 200 (8 ohm)
Com-Tech 400 (8 ohm)
Com-Tech 800 (8 ohm)
Com-Tech 1600 (8 ohm)
All Com-Tech (70-volt)
Macro-Tech 600
57
45
40
30
27
44
39
30
30
14
14
30
24
17
30
51
57
45
40
30
27
44
39
24
44
14
39
30
24
17
30
51
IN
IN
IN
IN
IN
IN
Here are some guidelines for twisted-pair wiring:
• Use shielded twisted-pair wire at least 26 AWG
in size when interference is a problem. The wire
should be of good quality and should have low
capacitance—30 picofarads/foot or less is good.
(West Penn 452 or an equivalent wire works well.)
The shield serves two purposes: First, it helps
prevent the IQ data signal from transmitting to
nearby audio wiring. Second, it helps prevent
outside RF from interfering with the data signal.
However, in most cases interference is not a
problem and, since unshielded wire has lower
capacitance, it is a better choice.
Macro-Tech 1200
IN
Macro-Tech 2400
IN
Macro-Tech 24x6
IN
Macro-Tech 3600VZ
Macro-Tech 36x12
Macro-Tech 5000VZ
Macro-Tech 10000
Reference I
IN
IN
OUT
IN
IN
Reference II
IN
PIP2-Compatible (Auto)
OUT
Fig. 3.6 Amplifier Scale Factor Values
and Output Signal Pad Settings
along with the settings of jumpers JP4 and JP5.
Note: Since it is possible to configure one chan-
nel of a Com-Tech amplifier in the 8-Ohm output
mode and the other channel in the 70-Volt output
mode, it may be necessary to configure the
scale factors differently for each channel.
• Minimize the total capacitance of each Crown
Bus loop. The total capacitance should be less
than 30 nanofarads. Allow for approximately 60
picofarads for each IQ component in a loop. This
accounts for a slight delay which occurs as data
signals pass through a component.
3.6 A Closer Look at Crown Bus Wiring
The IQ–P.I.P.–DSP must be connected to a Crown Bus
• Add an IQ Repeater for very long loops—greater
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IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems
than 1,000 feet (305 m)—or when required by
high-capacitance wire. Although we recommend
adding a repeater for loops longer than 1,000 feet,
it is often possible to go 2,000 feet (610 m) or
more. The most significant characteristic of the
wire is its capacitance. The lower the capaci-
tance, the longer the loop can be. Unshielded
wire typically has less capacitance.
should be connected to an IQ component with a screw
terminal plug.
IQ–P.I.P.–DSP Output
IQ Mixer
OUT
IN
4
1
+ – + –
3
2
• Never use the ground wire in a mic snake line.
It may sometimes be convenient to run Crown Bus
data signals to and from stage monitor amplifiers
along unused wire pairs in a mic snake. If this is
done, do not use the ground wire which is nor-
mally connected to pin 1 on an XLR connector or
data noise will be added to the audio lines. Use
only the signal lines which normally connect to
pins 2 and 3 of the XLRs. The maximum possible
Crown Bus loop distance will be less because
typical mic cables have high capacitance.
GND 1
Output (+)
Output (–)
Input (+)
Output (+) 2
Not used 3
Not used 4
Input (–)
Figure 3.8 IQ–P.I.P.–DSP Output Connection to an
IQ Component with a Screw Terminal Plug Connector
IQ Mixer
IQ–P.I.P.–DSP Input
OUT
+ – +IN–
5
1
2
4
3
Outside RF interference is seldom a problem for a
Crown Bus loop—especially if shielded twisted-pair
wire is used. However, there are extreme situations
when fiber optic wiring is recommended. For example,
locating a Crown Bus loop next to an AM radio
transmission line may require fiber optic cabling. An
extremely long Crown Bus loop distance may also
require fiber optic cabling.
Output (+)
Output (–)
Input (+)
1 Input (–)
2 Input (+)
3 GND
Optional Shield
Input (–)
4 Not used
5 Not used
Figure 3.9 An IQ Component with Screw Terminal
Plug Connected to the IQ–P.I.P.–DSP Input
The IQ components in a Crown Bus loop are wired
sequentially. The loop begins and ends with the IQ
interface. The output of one IQ component “loops” to
the input of the next and so on as shown in Figure 3.10.
There are two different types of connectors used for
Crown Bus wiring: DIN connectors and screw terminal
plugs. The IQ–P.I.P.–DSP uses a 5-pin DIN connector
for input and a 4-pin DIN connector for output. Figure
3.7 shows how they should be wired.
IQ–P.I.P.–DSP Output
IQ Component Input
IQ Interface
5
1
2
4
1
4
3
2
3
IQ Component
IQ Component
IQ Component
GND 1
1 Input (–)
2 Input (+)
3 GND
Output (+) 2
Not used 3
Not used 4
Optional Shield
4 Not used
5 Not used
Figure 3.7 IQ–P.I.P.–DSP Output Connection
to Another IQ Component with DIN Connectors
The next two figures show how to connect the IQ–
P.I.P.–DSP to other IQ components with different
connectors. Figure 3.8 shows how the Crown Bus
output of the IQ–P.I.P.–DSP should be connected to an
IQ component with a screw terminal plug. Figure 3.9
shows how the Crown Bus input of the IQ–P.I.P.–DSP
Fig. 3.10 Crown Bus Wiring “Loops” from the
Output to the Input of Each IQ Component
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IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems
plifier (if provided). The phone jacks are wired in paral-
lel with the output of the P.I.P. connector inside the am-
3.7 A Closer Look at Audio Signal Wiring
Balanced 3-pin female XLR connectors are provided
for audio input connection. The audio cables should
be wired in one of the following manners:
plifier. Any audio signal fed into the phone jacks could
feed back into the output of the IQ–P.I.P.–DSP and gen-
erate a distorted input signal. The phone jacks can be
used to “daisy chain” the post-processed signal from
the IQ–P.I.P.–DSP to the inputs of other amplifiers.
DO NOT USE THE CHANNEL 2 INPUT if the amplifier
is used in either Bridge-Mono or Parallel-Mono mode.
For additional information on audio input connection
please refer to the amplifier’s Reference or Owner‘s
Manual. It contains helpful information on preventing
unwanted subsonic frequencies, radio frequency inter-
ference, ground loops, and feedback oscillation.
Fig. 3.11 Audio Input Wiring
We strongly recommend that balanced wiring be used
if possible. Some important guidelines follow:
3.8 When External Power is Needed
• Always use shielded wire. The higher the density
of the shield (the outer conductor), the better.
Spiral wrapped shield is not recommended.
The IQ–P.I.P.–DSP draws 320 mA at +24 VDC and 160
mA at –24 VDC. Many Crown amplifiers can provide
this power via the P.I.P. edge connector inside. For
these IQ–P.I.P.-DSP/amplifier combinations, no exter-
nal power supply is needed. Amplifiers which can sup-
ply adequate power include all Com-Techs, all
Macro-Tech 5000VZ, all Studio Reference amplifiers
and all PIP2-compatible amplifiers. For IQ–P.I.P.-DSP
installations into 50-Hz versions of Macro-Tech amplifi-
ers (excluding the Macro-Tech 5000VZ), Crown rec-
ommends use of the S4 version of these amplifiers.
Please contact Crown Technical Support for more in-
formation about power supply options for the 50-Hz
Macro-Tech versions.
• When using unbalanced lines, keep the cables
as short as possible. Avoid lengths greater than
10 feet (3 meters).
• Do not run audio input cables together with
high-level wiring such as loudspeaker wires or
AC cords. (This lessens the chance of hum or
noise being induced into the input cables.)
• Do not connect audio and data grounds to-
gether. For example, do not connect the audio
ground to the Crown Bus ground.
• Turn the entire sound system off before chang-
ing any connections. Turn the level controls
down before powering the system back up.
Crown is not liable for damage incurred when
any transducer or component is overdriven.
Other Crown P.I.P.-compatible amplifiers may not be
able to supply the full 320 mA of +24 VDC power for
the IQ–P.I.P.–DSP, depending on how well regulated
the AC mains are that feed them and how hard the
amplifiers are driven. This includes the Macro-Tech
600, 1200, 2400, 24x6, 3600VZ and 36x12. We sug-
gest that a 400 mA +24 VDC supply be added for
these amplifiers as a safety measure to be certain that
adequate power is available. Note: Actually, external
power of only 200 mA is needed for these amplifiers,
but a 400 mA supply is recommended to be certain
that the external supply, itself, has a safety margin. A
mini jack is provided on the P.I.P. panel of the IQ–P.I.P.–
DSP for external power connection.
Balanced phone jacks are provided for “daisy chain”
audio output connection. The audio cables should be
wired in one of the following manners:
IMPORTANT: The IQ–P.I.P.–DSP cannot be operated
from an external power supply if the enable switch of
the amplifier is turned off. The amplifier is required to
provide –24 VDC.
Fig. 3.12 Audio Output Wiring
In order to comply with FCC and EC EMC regulations,
it is necessary to add an EMI (electro-magnetic inter-
ference) core to the daisy chain cable(s). A core, large
enough to snap over both cables, is provided.
CAUTION: If external power is needed, use an indi-
vidual, isolated power supply for each IQ–P.I.P.–DSP.
Do not attempt to share a common power supply with
multiple IQ–P.I.P.–DSP modules or the IQ–P.I.P.–DSP
modules may be damaged.
IMPORTANT: Do not feed a signal into the phone
jacks on the IQ–P.I.P.–DSP or the back panel of the am-
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IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems
4.4 Output Signal Level Monitor
4 Operation
The output signal level of each channel of the amplifier
can be monitored by the IQ System. This monitor
feature has a range from 0 dB to –40 dB where 0 dB is
referenced to the rated output voltage of the amplifier
model. (This is assumed to be 70-V or the rated 8 ohm
output for Com-Tech amplifiers or the rated 8 ohm
output voltage for all other amplifiers.)
With an IQ–P.I.P.–DSP module, your Crown amplifier
can be monitored and controlled from a remote
location through the use of an IQ System. This P.I.P.
module features SmartAmp™ capabilities which will
enable the amplifier to function automatically. For
example, the IQ–P.I.P.–DSP can automatically turn off
the high voltage supplies of the amplifier when no input
signal is present. This can lower electrical usage and
provide long-term cost savings. And it can
automatically limit the audio signal and detect and
report various problems.
The output signal of some amplifiers must be padded
before the IQ–P.I.P.–DSP can scale them. This is
accomplished by setting jumpers JP4 and JP5 on the
IQ circuit board to the “IN” position. Only the Macro-
Tech 5000VZ and PIP2-compatible amplifiers do not
require these pads. Set jumpers JP4 and JP5 to the
“OUT” position for them (see Figure 3.6).
In addition, the IQ–P.I.P.–DSP features distinctive digital
signal processing capabilities, including signal delays
and a wide variety of filters. Combined, this adds up to
a powerful array of audio control functions which are
easily accessed via the IQ System.
The output signals of all amplifiers must be scaled in
order to “calibrate” the 0 dB level. (See Section 4.4.)
This is accomplished with either an amplifier ID code
or a user scale factor. The factory default setting for
this is an amplifier ID code of “CT-70V” which assumes
that the output level is that of a Com-Tech amplifier (any
Most of the following features can be controlled or
configured using IQ software running on an IQ System
host computer. Commands are transmitted via an IQ
interface to the specified IQ component (an IQ2-
compatible interface is required). Please contact your
Crown representative or Crown’s Technical Support
Group if you are unfamiliar with IQ software. Where
specified, some features are accessed via controls
located on the unit itself.
model) with both channels in the 70-V output mode.
4.5 ODEP Level Monitor
The Output Device Emulation Protection (ODEP®) level
of each channel of the amplifier can be monitored by
the IQ software. This level represents the percent of
available thermodynamic capacity that is currently
being used. When the ODEP level reaches 100%, the
amplifier cannot produce any more power and “ODEP
limiting” will begin to limit the drive level to the output
devices, thereby protecting them from too much stress.
(See the amplifier’s Reference or Owner’s Manual for
more information about ODEP and how it works.)
4.1 Power/Standby Indicators
(IQ for Windows software only.) The power/standby in-
dicators allow you to monitor the power and standby
(mute) status of each channel via IQ for Windows soft-
ware.
4.2 IOC Event Monitor
The Input/Output Comparator (IOC®) of each channel
of the amplifier can be monitored by the IQ System.
The IOC circuitry acts as a sensitive distortion meter to
provide you proof of distortion-free performance. If
distortion of any kind equals or exceeds 0.05%, the IOC
circuit will cause an indicator on the front of the
amplifier to flash. By monitoring these events, the IQ
System can flash an indicator on the screen of the host
computer to alert a user that distortion is occurring.
4.6 Power Control
Each channel’s high-voltage supply can be
independently turned on and off with the Power control.
The IQ System is used to set this control.
4.7 Signal Mute
The output signal of each channel can be
independently muted by the IQ System. The function
typically provides 80 dB or more of attenuation.
4.3 Input Signal Level Monitor
IMPORTANT: The daisy chain outputs are also muted
The input signal level of each channel can be moni-
tored by IQ software. This monitor feature has a range
from +20 dBu to –40 dBu in ½-dB steps.
by this function.
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IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems
components in the IQ System. It is controlled by the IQ
4.8 Polarity Inverter
The polarity of the input signal of each channel can be
independently inverted by the IQ System.
System and it serves as a toggle to quickly enable or
disable many of the functions in the IQ–P.I.P.–DSP. The
functions that are enabled/disabled by the Auto control
are: input signal compressor/limiter, output limiter, auto
standby and ODEP Limiter warning.
4.9 Input Signal Attenuator
An attenuator is available at the input of each channel
to control the input signal level. These attenuators are
controlled and monitored by the IQ System. They may
appear to move like “flying faders” on some IQ software
screens because they reflect all reductions in gain that
are dynamically applied by the input compressor/
limiter, input protection limiter and ODEP conservation
functions. Each input attenuator has a range from 0 dB
to –80 dB in ½ dB steps. (Zero equals no attenuation.)
The filter and signal delay settings are not affected by
the Auto function. In the case of the filters, this can be
very important. For example, a high-frequency driver
should not be fed a full-band signal when someone
turns off the Auto control. Please refer to the User’s
Manual for your IQ software for more information about
the Auto function.
4.12 Input Signal Compressor/Limiter
An input signal compressor/limiter is available for each
channel. Each one is controlled by the IQ System and
has five parameters:
Note: The IQ–P.I.P.–DSP was designed for a nominal
input level of 0 dBu. If “hot” input signals are required,
use the input signal attenuators to “pad” the input
levels.
Input Compressor: Turns this function on/off.
4.10 Input Protection Limiter
Threshold: Sets the threshold, in dB, above which
the compressor acts. The level is measured at the
input to the P.I.P. and corresponds to the level
shown on an input meter. The compressor is
“feedforward,” meaning that the level detection
point is located before the gain control stage. The
range is from +16 dBu to –40 dBu.
The input protection limiter is not designed to be
changed by the user. It is set at the factory for minimal
interaction while providing adequate input protection.
It protects the A/D converter from an excessive input
signal. Normally there is no risk of this problem if the
unit is installed as instructed in Section 3 of this manual.
Attack Time: Sets the attack time of the
compressor. The attack time is defined as the time
it takes the compressor to attenuate the input
signal by 10 dB. The range is from 1 millisecond to
2 seconds.
The input protection limiter operates after the input
compressor (Section 4.12) and input attenuator
(Section 4.9) of each channel. If the compressor and/
or attenuator reduce the input gain enough to prevent
distortion, the input protection limiter will do nothing.
Release Time: Sets the release time of the
compressor. The release time is defined as the
time it takes the compressor to increase the input
gain by 10 dB. The range is 100 milliseconds to 30
seconds.
Note: Since the input attenuators can be dynamically
monitored by the IQ System, they may appear to move
as “flying faders” on some IQ software screens to
reflect dynamic gain reductions. Moving faders while
all other dynamic processing functions are turned off,
is an indication that the input protection limiters are
activating because the gain has not been optimized.
Ratio: Sets the compression ratio for the
compressor. The range is 1, 2, 4, 8, 16, 32, ¥ to 1.
Note: 1:1 is the same as “off.”
To prevent the input protection limiters from operating,
configure the amplifier with an input sensitivity of 0.775
V and operate the amplifier with the output level
controls at full volume as described in the installation
instructions in Section 3. In this configuration the
amplifier will clip before the threshold of the input
protection limiter is exceeded.
4.13 Smooth/Output Signal Limiter
An output signal limiter is available for each channel.
They can be used either as “smooth” output levelers
(similar to other IQ P.I.P.s with SmartAmp features) or
they can be used as fast output limiters to protect
drivers and other system components from large
transient signals. They follow the filter functions in the
DSP, making them frequency dependent. The output
voltage of the amplifier is limited (within ½ dB) based
on real-time sampling of the actual amplifier output. The
4.11 Auto
An Auto function (Auto System Actuate or “ASA”) is
available to provide consistency with other IQ
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IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems
output limiters are controlled by the IQ System and has
five parameters:
4.15 ODEP Limiter
The effects of “ODEP limiting” the drive level of the
output devices (as described in Section 4.5) are very
audible. To overcome this, an ODEP limiter is available
to proportionally limit the input audio signal as the
thermodynamic energy reserve of the amplifier is
consumed. This helps to prevent the amplifier from
“ODEP limiting” the drive level of the output devices as
described earlier. In the majority of cases, limiting the
input signal produces a very smooth sound. And since
the input signal is only limited when and to the degree
necessary, it is very difficult to detect. There are four
parameters which control this feature:
Output Limiter: Turns this function on/off.
Threshold: Sets the threshold, in dB, above which
the limiter acts. The level is based on the scaled
output voltage monitors (see Section 4.4). The
range is from 0 dB to –40 dB.
Attack Time: Sets the attack time of the limiter. The
attack time is defined as the time it takes the limiter
to attenuate the input signal by 10 dB. The range is
from 10 milliseconds to 30 seconds.
Release Time: Sets the release time of the limiter.
The release time is defined as the time it takes the
limiter to increase the input gain by 10 dB. The
range is 100 milliseconds to 30 seconds.
ODEP Conservation: Turns this function on/off.
ODEP Trigger Level: Sets the ODEP level, in
percent, above which the conservation limiting will
begin. The range is from 1 to 100%.
Ratio: The compression ratio is fixed at ¥:1.
ODEP Conservation Amount: Sets the amount,
in dB, that the input signal level will be attenuated
for each percentage point that the ODEP level
exceeds the trigger level. The range is ½ to 6 dB in
½-dB steps.
4.14 Auto Standby
The Auto Standby feature automatically turns off the
high-voltage supplies of the amplifier when no audio
signal is detected at the input for a predetermined
period of time. The channels are controlled
independently. Using it, many IQ Systems can pay for
themselves in just a few years due to reduced energy
costs. There are four parameters which control this
feature:
ODEP Conservation Release Time: Sets the
release time of the conservation limiter. The release
time is based on 10 dB of attenuation. For example,
a setting of 10 seconds will result in the IQ–P.I.P.–
DSP taking 10 seconds to release 10 dB of
attenuation. The range for this parameter is 200
milliseconds to 30 seconds.
Auto Standby: Turns this function on/off.
Standby Level: Sets the level, in dB, below which
the high voltage supply of an amplifier channel will
be turned off. The range is from +16 dBu to –40
dBu.
4.16 Excessive IOC Warning
A “trigger” can be set that will cause a warning
message to appear on the host computer’s screen if
too many IOC events occur over a specified length of
time. Three parameters control this feature:
Standby Time: Sets the time, in minutes, that the
input signal must remain below the Standby Level
before the channel’s high-voltage supply is turned
off. The range is from 0 to 255 minutes. A setting of
0 (zero) yields a turn-off delay of approximately 2
seconds to facilitate setup of the function.
IOC Error Detect: Turns this function on/off.
IOC Error Time: Sets the time interval over which
IOC events will be counted. The range is from 1 to
10 seconds.
Use Turn-On Delay: Enables or disables the IQ
address turn-on delay. This is a delay that prevents
all the amplifiers from turning on at the same instant
and tripping power breakers when an “all amps on”
command is issued by the IQ System. The turn-on
delay is calculated by: 10 msec x IQ address
value. It may be desirable to disable this turn-on
delay when using the Auto Standby feature so that
the first syllable of speech is not missed when a
voice page suddenly causes the Auto Standby
function to turn a high-voltage supply back on.
IOC Error Count: Sets the number of IOC events
that must occur during the preceding time interval
before a warning message is displayed. Note: An
“IOC event” is one complete on-off-on cycle. The
range is from 1 to 100 events per unit time
4.17 Excessive ODEP Warning
The user can set a “trigger” that will cause a warning
message to appear on the host computer’s screen if
the ODEP level ever rises above a predetermined level.
It is generally assumed that a sudden rise in the ODEP
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IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems
level would indicate a sudden decrease in the load
filter cells). There are seven different filter types from
which to choose—all controlled by the IQ System:
impedance—such as a shorted speaker cable or
shorted loudspeaker. There are two parameters which
control this feature:
Low-pass crossover filter (1st–4th order)
High-pass crossover filter (1st–4th order)
Parametric equalization filter (2nd order only)
Low-pass equalization filter (2nd order only)
High-pass equalization filter (2nd order only)
Low-pass shelving equalization (1st order only)
High-pass shelving equalization (1st order only)
ODEP Short Detect: Turns this function on/off.
ODEP Short Level: Sets the ODEP level above
which a short is presumed to have occurred in the
load resulting in a warning message being
displayed. The range is from 1 to 100%.
All filters have IIR based topologies to insure a proper
magnitude/phase relationship for use in professional
audio applications such as equalizer or crossover
(dividing) networks. Each channel has a total of eight
“biquad” filter cells. Note: “Biquad” refers to the double
quadratic equations which mathematically describe
each filter implemented in the digital signal processor.
4.18 Fault Warning
Fault conditions can be monitored by the IQ System
and a warning message displayed on the host
computer’s screen if they occur. If desired, the AUX port
can also be turned on during a “fault” condition. An
amplifier “fault” condition occurs when a channel fails.
The symptoms are a normal input signal, an IOC condi-
tion that is “locked” on, a high voltage supply (VCC)
that reports a normal condition and no signal at the
output of the amplifier. PIP2-compatible amplifiers
monitor a “fault” signal from the amplifier while stan-
dard P.I.P.-compatible amplifiers deduce a “fault” con-
dition from the aforementioned symptoms. There are
two parameters which control this feature:
The 1st and 2nd-order filters each require one biquad
filter cell. The 3rd and 4th-order filters each require two
biquad filter cells. This means that a channel can have
no more than four filters if they are all 3rd or 4th-order
filters. Remember that only eight filter cells are
available—this limits the total number of filters that a
channel can have. An error message will be reported
by the IQ software if this capacity is exceeded.
Fault: Turns this function on/off.
A description and list of the parameters of each filter
type are presented next:
Input Drive Level: Sets the threshold below which
a fault condition is presumed to exist in a standard
P.I.P. amplifier. This parameter is necessary
because it may be normal for an IOC error to
persist if the audio input signal level is high.
Monitoring the input level can help determine
whether a fault condition really exists or whether
the amplifier output is distorted simply because of
an excessive input level. The range is from +16
dBu to –40 dBu.
Low-Pass Crossover Filter
Description: This filter rolls off high frequencies
at a rate determined by the shape parameter.
The filter is commonly used to feed the low
frequency portion of an audio signal to woofers
or subwoofers. It can be combined with a high-
pass crossover filter to create a band-pass
crossover filter for driving mid-range drivers.
4.19 Signal Delay
A signal delay is available for each channel. Each one
is controlled by the IQ System and has one parameter:
Passband gain: Fixed at unity.
Frequency: Sets the –3 dB corner frequency of
the filter. The range is 20 Hz to 20 kHz.
Delay: Sets the amount of signal delay. The range is
1.25 milliseconds to 0.175 seconds in 22.7
microsecond steps. (The minimum delay of 1.25
milliseconds is inherent in the DSP system design.)
Shape: Sets the response shape of the filter.
Available response shapes are: 1st-order
Butterworth, 2nd-order Butterworth, 3rd-order
Butterworth, 4th-order Butterworth, 2nd-order
Bessel, 3rd-order Bessel, 4th-order Bessel and
4th-order Linkwitz-Riley.
Note: The signal delays are not disabled by the ASA
control.
4.20 Programmable Filters
High-Pass Crossover Filter
Description: This filter rolls off low frequencies at
a rate determined by the shape parameter. The
Each channel can have as many as eight different
cascaded filters (the actual number depends on the
mix of filters chosen and the total number of required
Page 18
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IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems
filter is commonly used to feed the high
frequency portion of an audio signal to horns or
tweeters. It can be combined with a low-pass
crossover filter to create a band-pass crossover
filter for driving mid-range drivers.
High-Pass Equalization Filter
Description: This filter combines the functions of
the parametric equalization filter to boost or cut
a relatively narrow frequency band with a high-
pass filter to roll of the frequencies below the
center frequency. Note: The low and high-pass
equalization filters can be cascaded to form
unique inter-order crossover-type filters.
Passband gain: Fixed at unity.
Frequency: Sets the –3 dB corner frequency of
the filter. The range is 20 Hz to 20 kHz.
Shape: Sets the response shape of the filter.
Available response shapes are: 1st-order
Butterworth, 2nd-order Butterworth, 3rd-order
Butterworth, 4th-order Butterworth, 2nd-order
Bessel, 3rd-order Bessel, 4th-order Bessel and
4th-order Linkwitz-Riley.
Frequency: Sets the center frequency of the
filter. The range is 20 Hz to 20 kHz.
Q: Sets the width, slope and gain of the filter. The
range is 0.1 to 30. The lower the Q, the wider the
filter, the lower the gain and the better the
transient response and visa versa. Gain
examples: A Q of 2 will result in 6 dB of gain at
the center frequency and a Q of 4 will result in 12
dB of gain. CAUTION: Avoid excessive Q’s.
Parametric Equalization Filter
Description: This filter boosts or cuts a relatively
narrow frequency band like a band-pass filter. It
is commonly used to correct specific anomalies
in the response of drivers.
Low-Pass Shelving Equalization Filter
Description: This filter boosts or cuts low
frequencies by the specified amount of gain.
Note: When used to cut rather than boost, the
filter acts like a high-pass rather than a low-pass
filter. It has a fixed 1st-order slope (6 dB/octave).
Passband Gain: Sets the amount of boost or cut
for the filter. The range is +12 dB to –24 dB.
Frequency: Sets the center frequency of the
filter. The range is 20 Hz to 20 kHz.
Q: Sets the width and slope of the filter. The
range is 0.1 to 30. The lower the Q, the wider the
filter and the better the transient response and
visa versa. CAUTION: Avoid excessive Q’s.
Passband Gain: Sets the amount of boost or cut
for the filter. The range is +12 dB to –24 dB.
Frequency: Sets the –3 dB corner frequency of
the filter. The range is 20 Hz to 20 kHz.
Low-Pass Equalization Filter
High-Pass Shelving Equalization Filter
Description: This filter combines the functions of
the parametric equalization filter to boost or cut
a relatively narrow frequency band with a low-
pass filter to roll of the frequencies above the
center frequency. It is commonly used to create
a B6 (6th-order Butterworth) response in a vented
loudspeaker enclosure. Note: The low and high-
pass equalization filters can be cascaded to
form unique inter-order crossover-type filters.
Description: This filter boosts or cuts high
frequencies by the specified amount of gain.
Note: When used to cut rather than boost, the
filter acts like a low-pass rather than a high-pass
filter. It has a fixed 1st-order slope (6 dB/octave).
It is commonly used to compensate for the
natural high-frequency roll-off common to
constant directivity horns.
Passband Gain: Sets the amount of boost or cut
for the filter. The range is +12 dB to –24 dB.
Frequency: Sets the center frequency of the
filter. The range is 20 Hz to 20 kHz.
Frequency: Sets the –3 dB corner frequency of
the filter. The range is 20 Hz to 20 kHz.
Q: Sets the width, slope and gain of the filter. The
range is 0.1 to 30. The lower the Q, the wider the
filter, the lower the gain and the better the
transient response and visa versa. Gain
examples: A Q of 2 will result in 6 dB of gain at
the center frequency and a Q of 4 will result in 12
dB of gain. CAUTION: Avoid excessive Q’s.
Note: 1st, 2nd, 3rd and 4th-order responses result in 6,
12, 18 and 24 dB/octave roll-offs, respectively.
Note: The filters are not disabled by the ASA control.
Reference Manual
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IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems
4.21 Memory Backup
4.26 Data Signal Presence Indicator
A memory backup feature is provided which can be
disabled, if desired. The factory default setting is
“enabled.” When enabled, it stores all run-time
parameters that can be controlled by the IQ software
into nonvolatile memory (EEPROM) at approximately
one second intervals. When disabled, all run-time
parameters are returned to the factory defaults
whenever the unit loses power.
A Data Signal Presence Indicator (DSPI) is provided
on the front panel. It flashes whenever commands
addressed to the IQ–P.I.P.–DSP are received. It can be
forced to stay on by IQ software to assist with
troubleshooting of an IQ System.
4.27 Reset
A recessed reset switch, accessible from outside the
P.I.P. panel (see Figure 2.1), enables the IQ–P.I.P.–DSP
to be restored to one of two sets of default settings. A
straightened paper clip or similar small object is
required to press the reset switch.
CAUTION: Be careful to turn on the memory backup
feature if the input attenuators will be used to set critical
levels. If the memory backup feature is turned off and
the IQ–P.I.P.–DSP loses power, the attenuators will be
reset to 0 dB, resulting in the loudest possible signal.
Press the reset switch for less than 2 seconds and all
settings, except the amplifier ID code or user scale
factors, will be reset with “user default” parameters and
the DSPI will flash once. This feature is only available if
“user default” settings have been previously
established. If none have, pressing the reset switch for
any length of time will cause the unit to be reset to the
“factory default” settings as described below.
4.22 Amp Mode
The stereo/mono mode of the amplifier can be stored
into the unit’s memory so the IQ System is aware of the
position of the amplifier’s stereo/mono switch. Storing
this setting serves as an “electronic reminder” to the
system—however, the stereo/mono mode cannot be
controlled with this setting. The modes are Stereo
(Dual), Bridge-Mono and Parallel-Mono. This software
Press the reset switch for more than 2 seconds and the
same settings will be reset with “factory default”
parameters and the DSPI will flash twice. After the unit
has been reset to the factory default settings, it will
behave like a standard P.I.P.-FX until it is
reprogrammed by an IQ System or it is toggled to the
“user default” settings.
amp mode setting is controlled by the IQ System.
4.23 Amplifier Information
(PIP2 amplifiers only.) Several items of information
about an amplifier can be displayed by the IQ software.
These include the manufacturer, model, date code,
serial number and revision level. Which items are
available depends on both the amplifier and the IQ
software used.
WARNING: Pressing the reset switch can cause the
IQ–P.I.P.–DSP to emit a brief pulse. We recommend
that the level controls of the amplifier be turned down
before pressing the reset switch.
4.24 IQ2 Protocol Support
4.28 User Default Settings
The IQ–P.I.P.–DSP uses Crown’s IQ2 protocol. This
makes it possible for the user to design custom graphic
display modules to control and monitor the unit with
IQ2-compatible IQ software.
The parameters for all functions, except the amplifier
ID code or user scale factors, can be saved as “user
default” parameters. Then, pressing the reset switch
for less than 2 seconds will restore all settings to the
“user default” values. Please consult the documenta-
tion of your IQ software for instructions on setting the
“user default” values.
4.25 Crown Bus “ Drop Out” Relays
“Drop out” relays are provided on the Crown Bus ports
to maintain the continuity of the IQ communication loop
even if the IQ–P.I.P.–DSP loses power.
Page 20
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IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems
converts the bits to volts. The DAC also provides low-pass
5 Technical Information
filtering. The output of the DAC drives the amplifier inputs
via the P.I.P. edge card connector as well as the “daisy
chain” outputs.
The purpose of the IQ–P.I.P.–DSP is to provide
extensive signal processing capabilities and to enable
an IQ System to control and monitor a P.I.P.-compatible
amplifier. See Sections 2 and 3 for a list of the facilities
and features. Figures 5.1 and 5.2 show hardware and
signal flow block diagrams of the unit.
5.1.2 Signal Flow Processing (see Figure 5.2)
The audio signals are attenuated via the input attenua-
tors, providing system gain setting as well as gain rang-
ing for the DSP system. The input compressor/limiters
then allow dynamic scaling of signals for many applica-
tions via common parameters such as threshold, ratio,
etc. The ODEP conservation limiters then provide system
protection with dynamic (but slowly varying) gain scaling
based on thermal conditions within the amplifier. Next the
signals are fed to the input protection limiters to keep the
signal below the voltage headroom of the DSP system.
5.1 Audio Signals
5.1.1 Hardware Processing (see Figure 5.1)
Balanced and unbalanced audio signals enter the mod-
ule at the XLR connectors. From these connectors, the
signals are RFI filtered and fed into a balanced to single-
ended conversion stage. Then they are sent to a monitor
input (discussed below) and also to a DCA (Digitally Con-
trolled Attenuator) for gain ranging via the IQ System. This
is essential because the DSP (Digital Signal Processing)
system has limited voltage headroom.
The signal is then fed into eight cascaded fully program-
mable 2nd-order DSP filter cells. All filter cells are IIR
based to provide a proper magnitude/phase relationship
for crossover and equalization applications. Each filter cell
is controllable. 1st and 2nd-order filter types use one filter
cell. 3rd and 4th-order filter types use two filter cells. The
output of the filter block is sent to an adjustable digital
signal delay section for audio signal delay. The minimum
delay is hardware-limited to 1.25 milliseconds. The output
of the delay section is sent to the output limiter section.
The DSP output limiter dynamically adjusts the system
gain to explicitly limit the output voltage of the amplifier
within ½ dB by utilizing the output voltage monitor infor-
mation from the data acquisition system. Common limiter
After the DCA, both channels are sent to an 18-bit dual-
channel ADC (Analog to Digital Converter). The ADC pro-
vides brick-wall low-pass filtering and “volts to bits”
conversion. The output of the ADC is a multiplexed serial
bitstream which is sent to the DSP. The DSP operates on
each sample of both channels (one at a time) via machine
language program instructions (firmware). The output of
the DSP is a serial bitstream which is sent to the DAC
(Digital to Analog Converter). The DAC is an 18-bit dual-
channel device which demultiplexes Channel 1 and 2 and
STATUS
MONITOR INPUTS
AUDIO
MONITOR
INPUTS
PEAK
CH 1
AUDIO
INPUTS
DETECTOR
PEAK
DETECTOR
CH 2
AUDIO
MONITOR
MULTI-
LOG AMP
IQ ADDRESS
SWITCH
SWITCHABLE
INPUT PAD
PEAK
DETECTOR
PLEXER
CH 1
AMPLIFIER
OUTPUTS
AMP REMOTE
STANDBY
SWITCHABLE
INPUT PAD
PEAK
DETECTOR
INPUT MUX
A/D CONV.
CH 2
EXTERNAL
RESET
CROWN BUS
SERIAL
DATA INPUT
ISO. INPUT
RECEIVER
MICROCONTROLLER
DSPI
DROP-OUT
RELAY
CROWN BUS
SERIAL
DATA OUTPUT
OUTPUT
DRIVER
BALANCED
DAISY-CHAIN
OUTPUT
CH 1
CH 1
DIGITALLY
ANALOG TO
DIGITAL
CONVERTER
DIGITAL
SIGNAL
PROCESSOR
DIGITAL TO
ANALOG
CONVERTER
CONTROLLED
2-CHANNEL
ATTENUATOR
TO AMPLIFIER
AUDIO INPUTS
BALANCED AUDIO INPUTS
CH 2
CH 2
BALANCED
DAISY-CHAIN
OUTPUT
P.I.P.
POWER
SUPPLY
EXTERNAL POWER
SUPPLY INPUT
EXTERNAL
MEMORY
Fig. 5.1 IQ–P.I.P.–DSP Hardware Circuit Block Diagram
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IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems
parameters are used here such as threshold, attack time,
5.2.3 DSPI Control
etc. Next, the output limiter is processed through control-
lable polarity inverters. The last processing section is an
output muter after which the signal is sent to the main am-
plifier for voltage and current amplification.
The DSPI LED flashes whenever a valid IQ command has
been received and can be forced to stay on to facilitate
diagnosis of Crown Bus wiring problems.
5.3 IQ System Communications
All parameters are continuously controllable via the IQ
System or can be set and will continue to operate.
The IQ–P.I.P.–DSP communicates with the host computer
via the Crown Bus. Connections to the Crown Bus are
made via the 4 and 5-pin locking DIN connectors on the
rear panel. IQ commands entering the P.I.P. are fed into
an input receiver circuit that converts the 20 mA current
loop signal into a standard logic signal that the 6811 mi-
croprocessor can understand. This signal is also passed
directly to the Crown Bus for output where it is passed on
to the remainder of the loop. Data sent in response to IQ
commands is also sent through the Crown Bus output
where it passes through the remainder of the loop and
back to the host computer. A “drop out” relay is also
present which makes a physical contact between the
Crown Bus input and output connectors in the event of a
power failure. This means that as long as the Crown Bus
cables are connected to the P.I.P., the Crown Bus will re-
main unbroken—even if power to the P.I.P. is lost.
5.2 Control/Monitor Functions
5.2.1 Audio Signals
In addition to controlling the audio input level and polarity,
the IQ–P.I.P.–DSP can turn on/off the high-voltage power
supplies. These functions are controlled using ports on
the 6811 microprocessor and some external support cir-
cuitry. The audio level is controlled by the 6811 micropro-
cessor through a digitally controlled analog attenuator.
The audio signals that are monitored are the input to the
P.I.P. and the output of the amplifier. These signals enter
the P.I.P. and are fed into a precision peak detector which
insures that instantaneous signal peaks are not “missed”
by the P.I.P. The detector outputs are then fed through a
multiplexer into a logarithmic conversion circuit for dy-
namic range scaling. The output of this circuit is then fed
into the A/D converter on the 6811 microprocessor, where
the signal is converted and sent to the host computer via
the Crown Bus.
5.4 Microprocessors and Reset Switch
The “brains” of the IQ–P.I.P.–DSP are contained in its two
microprocessors. A Motorola 6811 interprets commands
received from the Crown Bus and responds accordingly.
A Motorola 56002 manages all DSP functions. The
memory of both processors is backed up with EEPROM.
The IQ–P.I.P.–DSP is designed to provide an “automatic
reset” in the event of a power failure, but the rear reset
switch has also been added. Pressing this switch restores
all P.I.P. settings to the “user defaults” if it is pressed for
less than 2 seconds or to the factory defaults if it is
pressed for more than 2 seconds. The only exception is
the initialization data which can only be changed with IQ
System software on the host computer.
5.2.2 Status Signals
The status signals that are monitored are ODEP level, IOC
status and VCC status. These signals enter the P.I.P., pass
through a buffer stage, and are fed into the A/D converter
on the 6811 microprocessor. The signals are then con-
verted and sent to the host computer via the Crown Bus.
INPUT
ATTENUATOR
INPUT
COMPRESSOR
ODEP CONSER-
VATION LIMITER
INPUT PROTEC-
TION LIMITER
MAIN
AMPLIFIER
FLTR FLTR FLTR FLTR FLTR FLTR FLTR FLTR
SIGNAL
DELAY
OUTPUT
LIMITER
POLARITY
INVERTER
OUTPUT
MUTER
1
2
3
4
5
6
7
8
IQ-P.IP.-DP
AMPLIFIER
Fig. 5.2 IQ–P.I.P.–DSP Audio Signal Flow Block Diagram
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IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems
6 Specifications
General
Transmission Distance: Variable from 200 to 3000
Internal Controls: An 8-segment DIP switch sets the
IQ address (decimal range: 1–250). Note: If address
“0” is selected, the IQ–P.I.P.–DSP will operate in stand-
alone mode. A Reset switch, accessible with a straight-
ened paper clip through the P.I.P. panel, resets all
settings (except the amplifier output voltage scale fac-
tors) to the “user defaults” if it is pressed for less than 2
seconds or the factory defaults if it is pressed for more
than 2 seconds. Two jumpers (JP4, JP5) enable or dis-
able the output voltage scaling circuitry.
feet (61 to 914 m), depending upon wire capacitance.
Typically 1000 feet (305 M) using shielded twisted-pair
wire, #26 AWG or larger. Can be extended with an IQ
Repeater.
Audio
Please note: The audio specifications are referenced
to 0.775 V (0 dBu). Measurements were made at the
output of the IQ–P.I.P.–DSP module, itself.
Connectors: Crown Bus Input: Locking 5-pin female
DIN connector. Crown Bus Output: Locking 4-pin fe-
male DIN connector. Audio Input: Balanced 3-pin fe-
male XLR connector for each channel. Audio “Daisy
Chain” Output: ¼-inch balanced (tip, ring, sleeve)
phone jack. External Power: Mini jack.
Digital Signal Processor (DSP): 33 MHz, 16.5 MIPS
Motorola DSP56002 microprocessor with 32 K x 24
SRAM for run-time program/data storage and 32 K x 8
EEPROM for nonvolatile program/data memory
backup.
Analog to Digital Conversion (ADC): 18-bit. 64x
oversampled input. 44.1 kHz sample rate output.
Indicators: A yellow DSPI (Data Signal Presence Indi-
cator) flashes when a valid IQ command is received
from the IQ System via the Crown Bus. The DSPI can
be forced on to facilitate rapid troubleshooting of Crown
Bus wiring.
Digital to Analog Conversion (DAC): 18-bit. 8x inter-
polated Linear Phase FIR reconstruction filter. 44.1 kHz
sample rate input.
Nonvolatile Memory Backup: EEPROM capable of
75,000 typical writes.
Input Impedance: Nominally 24 K ohms balanced and
12 K ohms unbalanced.
Power Requirements: Power draw: 320 mA @ +24
VDC and 160 mA @ –24 VDC. When installed into a
Crown P.I.P.-compatible amplifier, the unit receives
±24 VDC from the amplifier. No further power is re-
quired if the unit is installed in a Com-Tech (all mod-
els), Macro-Tech 5000VZ or 10000, Reference or any
PIP2-compatible amplifier. The unit may require addi-
tional power in other amplifiers. External power should
be +24 VDC with a minimum of 200 mA (400 mA rec-
ommended for safety margin).
Maximum Input Level: +4 dBu @ 0 dB gain; +16 dBu
@ –12 dB gain.
Signal-to-Noise: >90 dB (A-weighted). >85 dBu from
20 Hz to 20 kHz.
Dynamic Range: >95 dBA (A-weighted).
Frequency Response: ±0.25 dB from 20 Hz to 20 kHz.
Crosstalk: –80 dB (typical). –60 dB (worst case at sig-
nal level and signal frequency extremes).
Common Mode Rejection (CMR): >90 dB (typical).
>70 dB (worst case at signal level and signal frequency
extremes).
Crown Bus Data Communication
Protection: If communication is lost, the unit will con-
tinue to function with the last commands received.
Total Harmonic Distortion (THD) + Noise: <0.05%
(typical). <0.1% (worst case at signal level and signal
frequency extremes).
Data Rate: 38.4 K BAUD.
Data Format: Serial, binary, asynchronous; 1 start bit;
1 stop bit; 8 data bits; no parity.
Output Impedance: Nominally 150 ohms (balanced).
Maximum Output Level: +4 dBu.
Crown Bus Interface Type: Optically isolated 20
milliamp serial loop.
Operation: Half duplex.
IQ System Data Acquisition
Input/Output Monitor Accuracy: Typically ±1 dB.
Intelligence: 8-bit, 8 MHz, 2 MIPS Motorola 6811 mi-
croprocessor.
Reference Manual
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IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems
7 IQ Address Tables
This section contains lookup tables for every valid IQ ad-
dress. The valid addresses are 1 to 250. Remember that
address “0” (zero) will put the IQ–P.I.P.–DSP into a stand-
alone mode where it is invisible to the IQ System and acts
like a “dumb” balanced audio input. Do not use an ad-
dress number higher than 250! Addresses above 250
are reserved for special system use.
Remember: No two IQ components of the same type
which are connected to the same Crown Bus loop can
have the same address.
To use the IQ address tables, simply find the address
you want and set the IQ address switch of the IQ–
P.I.P.–DSP as shown. See Section 4.1 also.
IQ Address Switch
IQ Address Switch
IQ Address Switch
IQ
Address
IQ
Address
IQ
Address
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
0
OFF OFF OFF OFF OFF OFF OFF OFF
ON OFF OFF OFF OFF OFF OFF OFF
OFF ON OFF OFF OFF OFF OFF OFF
ON ON OFF OFF OFF OFF OFF OFF
OFF OFF ON OFF OFF OFF OFF OFF
ON OFF ON OFF OFF OFF OFF OFF
OFF ON ON OFF OFF OFF OFF OFF
ON ON ON OFF OFF OFF OFF OFF
OFF OFF OFF ON OFF OFF OFF OFF
ON OFF OFF ON OFF OFF OFF OFF
OFF ON OFF ON OFF OFF OFF OFF
ON ON OFF ON OFF OFF OFF OFF
OFF OFF ON ON OFF OFF OFF OFF
ON OFF ON ON OFF OFF OFF OFF
OFF ON ON ON OFF OFF OFF OFF
ON ON ON ON OFF OFF OFF OFF
OFF OFF OFF OFF ON OFF OFF OFF
ON OFF OFF OFF ON OFF OFF OFF
OFF ON OFF OFF ON OFF OFF OFF
ON ON OFF OFF ON OFF OFF OFF
OFF OFF ON OFF ON OFF OFF OFF
ON OFF ON OFF ON OFF OFF OFF
OFF ON ON OFF ON OFF OFF OFF
ON ON ON OFF ON OFF OFF OFF
OFF OFF OFF ON ON OFF OFF OFF
ON OFF OFF ON ON OFF OFF OFF
OFF ON OFF ON ON OFF OFF OFF
ON ON OFF ON ON OFF OFF OFF
OFF OFF ON ON ON OFF OFF OFF
ON OFF ON ON ON OFF OFF OFF
OFF ON ON ON ON OFF OFF OFF
ON ON ON ON ON OFF OFF OFF
OFF OFF OFF OFF OFF ON OFF OFF
ON OFF OFF OFF OFF ON OFF OFF
OFF ON OFF OFF OFF ON OFF OFF
ON ON OFF OFF OFF ON OFF OFF
OFF OFF ON OFF OFF ON OFF OFF
ON OFF ON OFF OFF ON OFF OFF
OFF ON ON OFF OFF ON OFF OFF
ON ON ON OFF OFF ON OFF OFF
OFF OFF OFF ON OFF ON OFF OFF
ON OFF OFF ON OFF ON OFF OFF
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
OFF ON OFF ON OFF ON OFF OFF
ON ON OFF ON OFF ON OFF OFF
OFF OFF ON ON OFF ON OFF OFF
ON OFF ON ON OFF ON OFF OFF
OFF ON ON ON OFF ON OFF OFF
ON ON ON ON OFF ON OFF OFF
OFF OFF OFF OFF ON ON OFF OFF
ON OFF OFF OFF ON ON OFF OFF
OFF ON OFF OFF ON ON OFF OFF
ON ON OFF OFF ON ON OFF OFF
OFF OFF ON OFF ON ON OFF OFF
ON OFF ON OFF ON ON OFF OFF
OFF ON ON OFF ON ON OFF OFF
ON ON ON OFF ON ON OFF OFF
OFF OFF OFF ON ON ON OFF OFF
ON OFF OFF ON ON ON OFF OFF
OFF ON OFF ON ON ON OFF OFF
ON ON OFF ON ON ON OFF OFF
OFF OFF ON ON ON ON OFF OFF
ON OFF ON ON ON ON OFF OFF
OFF ON ON ON ON ON OFF OFF
ON ON ON ON ON ON OFF OFF
OFF OFF OFF OFF OFF OFF ON OFF
ON OFF OFF OFF OFF OFF ON OFF
OFF ON OFF OFF OFF OFF ON OFF
ON ON OFF OFF OFF OFF ON OFF
OFF OFF ON OFF OFF OFF ON OFF
ON OFF ON OFF OFF OFF ON OFF
OFF ON ON OFF OFF OFF ON OFF
ON ON ON OFF OFF OFF ON OFF
OFF OFF OFF ON OFF OFF ON OFF
ON OFF OFF ON OFF OFF ON OFF
OFF ON OFF ON OFF OFF ON OFF
ON ON OFF ON OFF OFF ON OFF
OFF OFF ON ON OFF OFF ON OFF
ON OFF ON ON OFF OFF ON OFF
OFF ON ON ON OFF OFF ON OFF
ON ON ON ON OFF OFF ON OFF
OFF OFF OFF OFF ON OFF ON OFF
ON OFF OFF OFF ON OFF ON OFF
OFF ON OFF OFF ON OFF ON OFF
ON ON OFF OFF ON OFF ON OFF
84
85
OFF OFF ON OFF ON OFF ON OFF
ON OFF ON OFF ON OFF ON OFF
OFF ON ON OFF ON OFF ON OFF
ON ON ON OFF ON OFF ON OFF
OFF OFF OFF ON ON OFF ON OFF
ON OFF OFF ON ON OFF ON OFF
OFF ON OFF ON ON OFF ON OFF
ON ON OFF ON ON OFF ON OFF
OFF OFF ON ON ON OFF ON OFF
ON OFF ON ON ON OFF ON OFF
OFF ON ON ON ON OFF ON OFF
ON ON ON ON ON OFF ON OFF
OFF OFF OFF OFF OFF ON ON OFF
ON OFF OFF OFF OFF ON ON OFF
OFF ON OFF OFF OFF ON ON OFF
ON ON OFF OFF OFF ON ON OFF
OFF OFF ON OFF OFF ON ON OFF
ON OFF ON OFF OFF ON ON OFF
OFF ON ON OFF OFF ON ON OFF
ON ON ON OFF OFF ON ON OFF
OFF OFF OFF ON OFF ON ON OFF
ON OFF OFF ON OFF ON ON OFF
OFF ON OFF ON OFF ON ON OFF
ON ON OFF ON OFF ON ON OFF
OFF OFF ON ON OFF ON ON OFF
ON OFF ON ON OFF ON ON OFF
OFF ON ON ON OFF ON ON OFF
ON ON ON ON OFF ON ON OFF
OFF OFF OFF OFF ON ON ON OFF
ON OFF OFF OFF ON ON ON OFF
OFF ON OFF OFF ON ON ON OFF
ON ON OFF OFF ON ON ON OFF
OFF OFF ON OFF ON ON ON OFF
ON OFF ON OFF ON ON ON OFF
OFF ON ON OFF ON ON ON OFF
ON ON ON OFF ON ON ON OFF
OFF OFF OFF ON ON ON ON OFF
ON OFF OFF ON ON ON ON OFF
OFF ON OFF ON ON ON ON OFF
ON ON OFF ON ON ON ON OFF
OFF OFF ON ON ON ON ON OFF
ON OFF ON ON ON ON ON OFF
1
2
86
3
87
4
88
5
89
6
90
7
91
8
92
9
93
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
Fig. 7.1 IQ Address Switch (SW1) Settings from 0 to 125
Page 24
Reference Manual
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IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems
IQ Address Switch
IQ Address Switch
IQ Address Switch
IQ
Address
IQ
Address
IQ
Address
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
OFF ON ON ON ON ON ON OFF
ON ON ON ON ON ON ON OFF
OFF OFF OFF OFF OFF OFF OFF ON
ON OFF OFF OFF OFF OFF OFF ON
OFF ON OFF OFF OFF OFF OFF ON
ON ON OFF OFF OFF OFF OFF ON
OFF OFF ON OFF OFF OFF OFF ON
ON OFF ON OFF OFF OFF OFF ON
OFF ON ON OFF OFF OFF OFF ON
ON ON ON OFF OFF OFF OFF ON
OFF OFF OFF ON OFF OFF OFF ON
ON OFF OFF ON OFF OFF OFF ON
OFF ON OFF ON OFF OFF OFF ON
ON ON OFF ON OFF OFF OFF ON
OFF OFF ON ON OFF OFF OFF ON
ON OFF ON ON OFF OFF OFF ON
OFF ON ON ON OFF OFF OFF ON
ON ON ON ON OFF OFF OFF ON
OFF OFF OFF OFF ON OFF OFF ON
ON OFF OFF OFF ON OFF OFF ON
OFF ON OFF OFF ON OFF OFF ON
ON ON OFF OFF ON OFF OFF ON
OFF OFF ON OFF ON OFF OFF ON
ON OFF ON OFF ON OFF OFF ON
OFF ON ON OFF ON OFF OFF ON
ON ON ON OFF ON OFF OFF ON
OFF OFF OFF ON ON OFF OFF ON
ON OFF OFF ON ON OFF OFF ON
OFF ON OFF ON ON OFF OFF ON
ON ON OFF ON ON OFF OFF ON
OFF OFF ON ON ON OFF OFF ON
ON OFF ON ON ON OFF OFF ON
OFF ON ON ON ON OFF OFF ON
ON ON ON ON ON OFF OFF ON
OFF OFF OFF OFF OFF ON OFF ON
ON OFF OFF OFF OFF ON OFF ON
OFF ON OFF OFF OFF ON OFF ON
ON ON OFF OFF OFF ON OFF ON
OFF OFF ON OFF OFF ON OFF ON
ON OFF ON OFF OFF ON OFF ON
OFF ON ON OFF OFF ON OFF ON
ON ON ON OFF OFF ON OFF ON
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
OFF OFF OFF ON OFF ON OFF ON
ON OFF OFF ON OFF ON OFF ON
OFF ON OFF ON OFF ON OFF ON
ON ON OFF ON OFF ON OFF ON
OFF OFF ON ON OFF ON OFF ON
ON OFF ON ON OFF ON OFF ON
OFF ON ON ON OFF ON OFF ON
ON ON ON ON OFF ON OFF ON
OFF OFF OFF OFF ON ON OFF ON
ON OFF OFF OFF ON ON OFF ON
OFF ON OFF OFF ON ON OFF ON
ON ON OFF OFF ON ON OFF ON
OFF OFF ON OFF ON ON OFF ON
ON OFF ON OFF ON ON OFF ON
OFF ON ON OFF ON ON OFF ON
ON ON ON OFF ON ON OFF ON
OFF OFF OFF ON ON ON OFF ON
ON OFF OFF ON ON ON OFF ON
OFF ON OFF ON ON ON OFF ON
ON ON OFF ON ON ON OFF ON
OFF OFF ON ON ON ON OFF ON
ON OFF ON ON ON ON OFF ON
OFF ON ON ON ON ON OFF ON
ON ON ON ON ON ON OFF ON
OFF OFF OFF OFF OFF OFF ON ON
ON OFF OFF OFF OFF OFF ON ON
OFF ON OFF OFF OFF OFF ON ON
ON ON OFF OFF OFF OFF ON ON
OFF OFF ON OFF OFF OFF ON ON
ON OFF ON OFF OFF OFF ON ON
OFF ON ON OFF OFF OFF ON ON
ON ON ON OFF OFF OFF ON ON
OFF OFF OFF ON OFF OFF ON ON
ON OFF OFF ON OFF OFF ON ON
OFF ON OFF ON OFF OFF ON ON
ON ON OFF ON OFF OFF ON ON
OFF OFF ON ON OFF OFF ON ON
ON OFF ON ON OFF OFF ON ON
OFF ON ON ON OFF OFF ON ON
ON ON ON ON OFF OFF ON ON
OFF OFF OFF OFF ON OFF ON ON
ON OFF OFF OFF ON OFF ON ON
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
OFF ON OFF OFF ON OFF ON ON
ON ON OFF OFF ON OFF ON ON
OFF OFF ON OFF ON OFF ON ON
ON OFF ON OFF ON OFF ON ON
OFF ON ON OFF ON OFF ON ON
ON ON ON OFF ON OFF ON ON
OFF OFF OFF ON ON OFF ON ON
ON OFF OFF ON ON OFF ON ON
OFF ON OFF ON ON OFF ON ON
ON ON OFF ON ON OFF ON ON
OFF OFF ON ON ON OFF ON ON
ON OFF ON ON ON OFF ON ON
OFF ON ON ON ON OFF ON ON
ON ON ON ON ON OFF ON ON
OFF OFF OFF OFF OFF ON ON ON
ON OFF OFF OFF OFF ON ON ON
OFF ON OFF OFF OFF ON ON ON
ON ON OFF OFF OFF ON ON ON
OFF OFF ON OFF OFF ON ON ON
ON OFF ON OFF OFF ON ON ON
OFF ON ON OFF OFF ON ON ON
ON ON ON OFF OFF ON ON ON
OFF OFF OFF ON OFF ON ON ON
ON OFF OFF ON OFF ON ON ON
OFF ON OFF ON OFF ON ON ON
ON ON OFF ON OFF ON ON ON
OFF OFF ON ON OFF ON ON ON
ON OFF ON ON OFF ON ON ON
OFF ON ON ON OFF ON ON ON
ON ON ON ON OFF ON ON ON
OFF OFF OFF OFF ON ON ON ON
ON OFF OFF OFF ON ON ON ON
OFF ON OFF OFF ON ON ON ON
ON ON OFF OFF ON ON ON ON
OFF OFF ON OFF ON ON ON ON
ON OFF ON OFF ON ON ON ON
OFF ON ON OFF ON ON ON ON
ON ON ON OFF ON ON ON ON
OFF OFF OFF ON ON ON ON ON
ON OFF OFF ON ON ON ON ON
OFF ON OFF ON ON ON ON ON
Fig. 7.2 IQ Address Switch (SW1) Settings from 126 to 250
Reference Manual
Page 25
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IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems
8 Service
This unit has very sophisticated circuitry which should
only be serviced by a fully trained technician.
Always use the
original factory pack
to transport the unit.
8.1 Worldwide Service
Service may be obtained from an authorized service
center. (Contact your local Crown/Amcron representa-
tive or our office for a list of authorized service centers.)
To obtain service, simply present the bill of sale as
proof of purchase along with the defective unit to an
authorized service center. They will handle the neces-
sary paperwork and repair.
form that follows and enclose it inside your unit’s
shipping pack. Do not send the service informa-
tion form separately.
2. To ensure the safe transportation of your unit to
the factory, ship it in an original factory packing
container. If you don’t have one, call or write
Crown’s Parts Department. With the exception of
polyurethane or wooden crates, any other pack-
ing material will not be sufficient to withstand the
stress of shipping. Do not use loose, small size
packing materials.
Remember to transport your unit in the original factory
pack.
8.2 North American Service
3. Do not ship the unit in any kind of cabinet (wood
or metal). Ignoring this warning may result in ex-
tensive damage to the unit and the cabinet. Ac-
cessories are not needed—do not send the
Reference or Owner’s Manual, cables and other
hardware.
Service may be obtained from the factory. It is
important that you have your copy of the bill of sale as
your proof of purchase.
8.2.1 Factory Service
To obtain factory service, fill out the service informa-
tion page found in the back of this manual and send it
along with your proof of purchase and the defective
unit to the Crown factory.
If you have any questions, please call or write the
Crown Technical Support Group.
For warranty service, we will pay for ground shipping
both ways in the United States. Contact Crown Factory
Service or Technical Support to obtain prepaid ship-
ping labels prior to sending the unit. Or, if you prefer,
you may prepay the cost of shipping, and Crown will
reimburse you. Send copies of the shipping receipts to
Crown to receive reimbursement.
Crown Audio Division
Technical Support / Factory Service
Plant 2 SW, 1718 W. Mishawaka Rd., Elkhart,
Indiana 46517 U.S.A.
Telephone: 219-294-8200
800-342-6939 (North America,
Puerto Rico, and Virgin Islands only)
Your repaired unit will be returned via UPS ground.
Please contact us if other arrangements are required.
Facsimile: 219-294-8301 (Technical Support)
219-294-8124 (Factory Service)
Factory Service Shipping Instructions:
Fax Back: 219-293-9200 (North America only)
800-294-4094 (North America only)
219-294-8100 (International)
1. When sending a Crown product to the factory for
service, be sure to fill out the service information
Internet:
Email:
iqsupport@crownintl.com
Page 26
Reference Manual
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Crown Factory Service Information
Shipping Address: Crown International, Inc., Factory Service, Plant 2 SW, 1718 W. Mishawaka Rd., Elkhart, IN 46517
Phone: 1-800-342-6939 or 1-219-294-8200 Fax: 1-219-294-8124
Owner’s Name: _________________________________________________________________________
Shipping Address: ______________________________________________________________________
Phone Number: _____________________________ Fax Number: _____________________________
Model: ________________________ Serial Number:______________ Purchase Date: ___________
NATURE OF PROBLEM
(Be sure to describe the conditions that existed when the problem occurred and what attempts were made to correct it.)
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
Other equipment in your system: _________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
If warranty has expired, payment will be: Cash/Check VISA MasterCard C.O.D.
Card Number:___________________________ Exp. Date:_______ Signature:____________________________
ENCLOSE THIS PORTION WITH THE UNIT. DO NOT MAIL SEPARATELY.
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