Crown Audio IQ P.I.P.-DSP User Manual

An IQ System® Programmable Input Processor with DSP

for Crown® P.I.P.®-compatible Power Amplifiers

™

6

,

SmartAmp

Macro-Tech

IQ–P.I.P.–DSP

™

and

Macro Reference

®

,

Com-Tech

is produced by Crown International, Inc. Trademark Notice:

®

and

™

are trademarks and

®

P.I.P.

are registered trademarks of Crown International, Inc. Other

Amcron

®

,

Crown

®

,

IQ System

®

MPX-6

,

IOC

®

,

™

,

SMX-

ODEP

trademarks are the property of their respective owners.

®

,

Printed on

recycled paper.

103291-2

9/99

3

YEAR

IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems

THREE YEAR

FULL WARRANTY

3

YEAR

WORLDWIDE

The Crown Audio Division of Crown International, Inc., 1718 West Mishawaka Road, Elkhart, Indiana 46517-4095 U.S.A. warrants to you, the ORIGINAL PURCHASER and ANY SUBSEQUENT OWNER of each NEW Crown purchase by the original purchaser (the “warranty period”) that the new Crown product is free of defects in materials and workmanship, and we further warrant the new Crown product regardless of the reason for failure, except as excluded in this Crown Warranty.

1

Note: If your unit bears the name “Amcron,” please substitute it for the

name “Crown” in this warranty.

ITEMS EXCLUDED FROM THIS CROWN WARRANTY

This Crown Warranty is in effect only for failure of a new Crown product which occurred within the Warranty Period. It does not cover any product which has been damaged because of any intentional misuse, accident, negligence, or loss which is covered under any of your insurance contracts. This Crown Warranty also does not extend to the new Crown product if the serial number has been defaced, altered, or removed.

We will remedy any defect, regardless of the reason for failure (except as excluded), by repair, replacement, or refund. We may not elect refund unless you agree, or unless we are unable to provide replacement, and repair is not practical or cannot be timely made. If a refund is elected, then you must make the defective or malfunctioning product available to us free and clear of all liens or other encumbrances. The refund will be equal to the actual purchase price, not including interest, insurance, closing costs, and other finance charges less a reasonable depreciation on the product from the date of original purchase. Warranty work can only be performed at our authorized service centers. We will remedy the defect and ship the product from the service center within a reasonable time after receipt of the defective product at our authorized service center.

You must notify us of your need for warranty service not later than ninety (90) days after expiration of the warranty period. All components must be shipped in a factory pack. Corrective action will be taken within a reasonable time of the date of receipt of the defective product by our authorized service center. If the repairs made by our authorized service center are not satisfactory, notify our authorized service center immediately.

DISCLAIMER OF CONSEQUENTIAL AND INCIDENTAL DAMAGES

YOU ARE NOT ENTITLED TO RECOVER FROM US ANY INCIDENTAL DAMAGES RESULTING FROM ANY DEFECT IN THE NEW CROWN PRODUCT. THIS INCLUDES ANY DAMAGE TO ANOTHER PRODUCT OR PRODUCTS RESULTING FROM SUCH A DEFECT.

No person has the authority to enlarge, amend, or modify this Crown Warranty. This Crown Warranty is not extended by the length of time which you are deprived of the use of the new Crown product. Repairs and replacement parts provided under the terms of this Crown Warranty shall carry only the unexpired portion of this Crown Warranty.

We reserve the right to change the design of any product from time to time without notice and with no obligation to make corresponding changes in products previously manufactured.

No action to enforce this Crown Warranty shall be commenced later than ninety (90) days after expiration of the warranty period.

THIS STATEMENT OF WARRANTY SUPERSEDES ANY OTHERS

CONTAINED IN THIS MANUAL FOR CROWN PRODUCTS.

Telephone: 219-294-8200. Facsimile: 219-294-8301

Page 2

SUMMARY OF WARRANTY

1

product, for a period of three (3) years from the date of

WHAT THE WARRANTOR WILL DO

HOW TO OBTAIN WARRANTY SERVICE

WARRANTY ALTERATIONS

DESIGN CHANGES

LEGAL REMEDIES OF PURCHASER

9/90

NORTH AMERICA

The Crown Audio Division of Crown International, Inc., 1718 West Mishawaka Road, Elkhart, Indiana 46517-4095 U.S.A. warrants to you, the ORIGINAL PURCHASER and ANY SUBSEQUENT OWNER of each NEW Crown product, for a period of three (3) years from the date of purchase by the original purchaser (the “warranty period”) that the new Crown product is free of defects in materials and workmanship. We further warrant the new Crown product regardless of the reason for failure, except as excluded in this Warranty.

ITEMS EXCLUDED FROM THIS CROWN WARRANTY

This Crown Warranty is in effect only for failure of a new Crown product which occurred within the Warranty Period. It does not cover any product which has been damaged because of any intentional misuse, accident, negligence, or loss which is covered under any of your insurance contracts. This Crown Warranty also does not extend to the new Crown product if the serial number has been defaced, altered, or removed.

We will remedy any defect, regardless of the reason for failure (except as excluded), by repair, replacement, or refund. We may not elect refund unless you agree, or unless we are unable to provide replacement, and repair is not practical or cannot be timely made. If a refund is elected, then you must make the defective or malfunctioning product available to us free and clear of all liens or other encumbrances. The refund will be equal to the actual purchase price, not including interest, insurance, closing costs, and other finance charges less a reasonable depreciation on the product from the date of original purchase. Warranty work can only be performed at our authorized service centers or at the factory. We will remedy the defect and ship the product from the service center or our factory within a reasonable time after receipt of the defective product at our authorized service center or our factory. All expenses in remedying the defect, including surface shipping costs in the United States, will be borne by us. (You must bear the expense of shipping the product between any foreign country and the port of entry in the United States and all taxes, duties, and other customs fees for such foreign shipments.)

You must notify us of your need for warranty service not later than ninety (90) days after expiration of the warranty period. All components must be shipped in a factory pack, which, if needed, may be obtained from us free of charge. Corrective action will be taken within a reasonable time of the date of receipt of the defective product by us or our authorized service center. If the repairs made by us or our authorized service center are not satisfactory, notify us or our authorized service center immediately.

DISCLAIMER OF CONSEQUENTIAL AND INCIDENTAL DAMAGES

YOU ARE NOT ENTITLED TO RECOVER FROM US ANY INCIDENTAL DAMAGES RESULTING FROM ANY DEFECT IN THE NEW CROWN PRODUCT. THIS INCLUDES ANY DAMAGE TO ANOTHER PRODUCT OR PRODUCTS RESULTING FROM SUCH A DEFECT. SOME STATES DO NOT

ALLOW THE EXCLUSION OR LIMITATIONS OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU.

No person has the authority to enlarge, amend, or modify this Crown Warranty. This Crown Warranty is not extended by the length of time which you are deprived of the use of the new Crown product. Repairs and replacement parts provided under the terms of this Crown Warranty shall carry only the unexpired portion of this Crown Warranty.

We reserve the right to change the design of any product from time to time without notice and with no obligation to make corresponding changes in products previously manufactured.

THIS CROWN WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE. No action to enforce this Crown Warranty shall be commenced later than ninety (90) days after expiration of the warranty period.

THIS STATEMENT OF WARRANTY SUPERSEDES ANY OTHERS

CONTAINED IN THIS MANUAL FOR CROWN PRODUCTS.

Telephone: 219-294-8200. Facsimile: 219-294-8301

SUMMARY OF WARRANTY

WHAT THE WARRANTOR WILL DO

HOW TO OBTAIN WARRANTY SERVICE

WARRANTY ALTERATIONS

DESIGN CHANGES

LEGAL REMEDIES OF PURCHASER

9/90

Reference Manual

IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems

Important Safety Instructions

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 radiators, 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 groundingtype plug has two blades and a third grounding prong. The wide blade or the third prong is pr ovided for your safety. When the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.

10) Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.

11) Only use attachments/accessories specified by the manufacturer.

12) Use only with a car t, stand, bracket, or table specified 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 tipover.

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

Page 3

IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems

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

Fax Back (International): 219-294-8100 Internet: http://www.crownaudio.com

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 operated in a commercial environment. 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 cause harmful interference in which case the 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. ”

Page 4

Reference Manual

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 and who would like to install the 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 address. (Tip: Record the IQ address on the small blank label that is provided on lower right corner of the

2. Set jumpers JP4 and JP5. Set both jumper JP4 and JP5 to the “OUT” position if either a

PIP2

-compatible or

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

6. Set the amplifier input sensitivity switch to 0.775 V. (See the

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

DSP

. It is a good idea to maintain ground contact between yourself and the amplifier

while inserting the module into the

8. Install the

IQ–P.I.P.–DSP

Standard P.I.P. Amplifiers:

and firmly push the unit in until it is seated against the mounting bracket (Figure 4.4).

PIP2 Compatible Amplifiers:

cables. Plug the the

P.I.P.

opening in the back of the amplifier (Figures 4.5 and 4.6).

9. Tighten the two

P.I.P.

Install the wiring:

10. Connect the information is needed).

11. Connect the audio signal wiring to the and the phone jack daisy chain wiring—if desired (see Section 4.7 if more information is needed).

IQ–P.I.P.–DSP

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.

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

14.

Standard P.I.P. Amplifiers:

with appropriate

PIP2 Compatible Amplifiers:

P.I.P.

Macro-Tech 5000VZ

P.I.P.

into the amplifier:

IQ–P.I.P.–DSP

mounting screws until it is secured to the amplifier back panel.

IQ–P.I.P.–DSP

IQ System

IQ–P.I.P.–DSP

panel.)

or cover panel from the amplifier back panel (two screws).

P.I.P.

card rails in the next step.

Align the edges of the

Connect the

into the

to the

PIP2

IQ System

IQ–P.I.P.–DSP

in the shortest time possible. Less

amplifier will be used (Figures 2.1 and 4.7).

IQ–P.I.P.–DSP

PIP2

input adapter to the amplifier input

input adapter and insert the assembly into

via the Crown Bus (see Section 4.6 if more

. This includes the XLR input wiring

Note: The IQ–P.I.P.–DSP may require

to adjust the input levels down.

Manually configure the scaling factors of the

software.

The scaling factors will be automatically set.

IQ–P.I.P.–DSP

Reference

in the

P.I.P.

IQ System

to an unused

or

Owner’s

IQ–P.I.P.–

card rails

IQ–P.I.P.–DSP

Reference Manual

Page 5

IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems

CONTENTS

Quick Install Procedure .......................................... 5

1 Welcome..................................................................7

1.1 Unpacking ...................................................... 7

2 Facilities .................................................................. 8

3 Installation.............................................................10

3.1 Prepare the

3.2 Prepare the Amplifier ....................................11

3.3 Install the

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

4 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

ODEP

4.5

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

ODEP

4.15

4.16 Excessive

IQ–P.I.P.–DSP

Level Monitor...................................... 14

Limite r ................................................17

IOC

Warning ................................17

.............................10

into the Amplifier ..... 11

4.17 Excessive

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

5 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

IQ System

5.3

5.4 Microprocessor and Reset Switch.................22

6 Specifications ....................................................... 23

7 IQ Address Tables.................................................24

8 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

ODEP

Warning............................. 18

Communications.......................... 22

ILLUSTRATIONS

1.1

IQ–P.I.P.–DSP .............................................................................................................................................................

3.1 IQ Address Switch (SW1) Location ..........................................................................................................................10

3.2 IQ Address Switch (SW1) Values .............................................................................................................................10

3.3 Installation into a Standard P.I.P. Amplifier ................................................................................................................ 11

3.4 PIP2 Input Adapter Connection................................................................................................................................11

3.5 Installation into a PIP2 Amplifier ...............................................................................................................................11

3.6 Amplifier Scale Factor Values and Output Signal Pad Settings.................................................................................12

3.7 IQ–P.I.P.–DSP Output toIQ Component with DIN ......................................................................................................13

3.8 IQ–P.I.P.–DSP Output to IQ Component w/ Screw Terminal Plug ..............................................................................13

3.9 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 IQ–P.I.P.–DSP Hardware Circuit Block Diagram........................................................................................................21

5.2 IQ–P.I.P.–DSP Audio Signal Flow Block Diagram ......................................................................................................22

7.1 IQ Address Switch (SW1) Settings from 0 to 125......................................................................................................24

7.2 IQ Address Switch (SW1) Settings from 126 to 250..................................................................................................25

Page 6

Reference Manual

7

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

nects an IQ-compatible amplifier to the Crown Bus of an

IQ System

monitored. Its DSP (digital signal processing) capabilities enable it to offer a variety of programmable functions, 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

™

amplifier (an external AC power adapter may be required with certain amplifiers).

is a powerful IQ component that con-

so the amplifier can be controlled and

IQ P.I.P.s

. The module is powered by the

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 car d today and save the bill of sale since it is your official proof of purchase.

The

IQ–P.I.P.–DSP

®

P.I.P.

(programmable input processor) and

patible amplifiers. Because it is also an

is a

PIP2

input module for Crown

IQ2

-series com-

PIP2

-com-

ponent, it supports Crown’s UCODE protocol and requires an

IQ System

®

with an

IQ2

-compatible IQ interface. UCODE (universal code) enables users and third parties to develop custom software objects to control and monitor

IQ–P.I.P.–DSP

To ensure fast and accurate processing, the

DSP

features two separate onboard processors. A Motorola 6811 microprocessor inside the sees communication with the

SmartAmp

IQ2

-compatible components like the

.

IQ System

features (similar to an

IQ–P.I.P.-

P.I.P.

over-

and most

IQ–P.I.P.–SMT)

. A Motorola 56002 microprocessor handles all digital signal processing.

Each

IQ–P.I.P.–DSP

is easy to install and includes an IQ address switch, allowing the unit to have a unique address on the Crown Bus. Its error-tolerant design enables it to automatically reset itself if noise “spikes” or other disturbances are encountered.

Reference Manual

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.

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.

Even if the unit arrived in perfect condition, as most do, save all packing materials. NEVER SHIP THE UNIT

WITHOUT THE FACTORY PACK.

Page 7

IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems

-

DSP

DCE

Front View

Bottom View

21

3

P. I.P.

GND

DSPI

PUSH

CH-2 CH-1AUDIO IN

PUSH

AUDIO OUT

CH-2 CH-1

B B C F HA A

IN OUT

CROWN

BUS

TIP=

EXT. POWER INPUT

RING=

24 VDC / 400 mA

G

DSP#.###

AVOID STATIC DAMAGE!

GROUND YOURSELF TO THE OUTER

METAL COLLAR OF ONE OF THE

CROWN BUS CONNECTORS.

RN1

SW1

K

N

JP4 JP5

CH1 CH2

I

J J

Fig. 2.1 The IQ–P.I.P.–DSP Facilities

2 Facilities

A. Mounting Screws

The

IQ–P.I.P.–DSP

amplifier with two phillips-head screws and star-tooth lock washers. The lock washers are required for proper ground connection.

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

is secured to the back panel of the

RN2

M L

K

inverted (–).

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 unbalanced (tip, sleeve) wiring may be used. The audio signal feeding these outputs is post-processed.

Do not use the Ch.2 input if the amplifier is

Reference Manual

IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems

D. Reset Switch

A multifunction reset switch is provided to restore the

IQ–P.I.P.–DSP

a straightened paper clip through the small hole in the

P.I.P.

panel. Press the reset switch for less than 2 seconds 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” settings have been stored, the unit will be reset to the “factory 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 standard

P.I.P.-FX

tem

or it is toggled to the “user default” settings.

WARNING: Pressing the reset switch can cause the

IQ–P.I.P.–DSP

that the level controls of the amplifier be turned down before pressing the reset switch.

to a prior state. It can be depressed with

until it is reprogrammed by an

to emit a brief pulse. We recommend

IQ Sys-

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 wiring.

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.

H. Crown Bus Output Connector

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 of the amplifier. Use care when installing a ule to be certain that the edge connector is properly inserted into the amplifier’s

P.I.P.

connector inside the back

P.I.P.

connector.

P.I.P.

mod-

J. Amplifier Output Pad Jumpers (JP4, JP5)

These jumpers enable the circuitry that pads the output signal feeding the 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

K.

PIP2

SIP Sockets (RN1, RN2)

These eight-pin SIP (single in-line package) sockets are provided for full

PIP2

modules (required for PIP2-compatible amplifiers) should come with the SIP networks already installed. The SIP networks are not required and should be absent on standard

IQ–P.I.P.–DSP

Macro-Tech 5000VZ

PIP2

compatibility.

IQ-P.I.P.-DSP

modules.

so it can be prop-

amplifier.

IQ-P.I.P.-DSP-

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 nector.

P.I.P.

edge con-

G. External Power Input

A mini jack is provided to receive power from an external 24 VDC, 400 mA source. External power is not needed when the

Tech 5000VZ PIP2

-compatible amplifier. However, other

models may require additional power for the

DSP

. An external 120 VAC power adapter (C 7926-6)

is available from Crown. See Section 3.8. CAUTION: Use only an individual, isolated power sup-

ply for each common power supply with more than one unit or the

IQ–P.I.P.–DSP

Reference Manual

IQ–P.I.P.–DSP

or

10,000

, a Com-Tech, a Reference or a

IQ–P.I.P.–DSP

modules may be damaged.

is installed in a

. Do not attempt to share a

Macro-

Macro-Tech

IQ–P.I.P.–

M. Audio Circuit Board (Bottom)

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 component 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.

Page 9

IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems

-

DSP

3 Installation

Before beginning, please carefully note:

CAUTION: STATIC ELECTRICITY MAY DAMAGE THE

IQ–P.I.P.–DSP

handling the unit. Carefully ground yourself BEFORE touching the

IQ–P.I.P.–DSP

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.

NOTE — Amplifier Compatibility

The version of the 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

should be ordered for non-PIP2-compatible amplifiers. Should you later wish to change the amplifier you are

using for your 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.

MODULE. Use caution when

module. For added safety,

IQ-P.I.P .-DSP

card you received will

. The standard

IQ-P.I.P.-DSP

installation, it is possible to

IQ-P.I.P.-DSP

is used to set the IQ address of the

DSP.

No two IQ components of the same type

IQ–P.I.P .–

which are connected to the same Crown Bus can have the ample, an 1 and 2, and this

same address. Suppose, for ex-

IQ System

has two Crown Bus loops,

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

loop 1. However, an

can be given the same address in

IQ–P.I.P.–DSP

in loop 2 can

have the same address. 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. 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

is invisible to the

into a stand-alone mode where it

1

VALUE

IQ System

8163264128

2

4

and acts as a

ON

SW1

12345678

TOP VIEW

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 individually controlled and monitored. Whenever the

System

wants to send a command to just one IQ

component, it first sends its address and then the

CROWN

IN OUT

BUS

T

-1

H

C

=

G

IN

R

DSP#.###

T

=

U

P

TIP

IN

R

E

W

A

O

m

0

. P

0

T

X

/ 4

C

E

D

V

4

2

21

3

P. I. P.

D

N

G

PUSH

CH-2

AUDIO IN

PUSH

CH-1

DSPI

U

O

IO

D

U

A

-2

H

C

BOTTOM

Fig. 3.1 IQ Address Switch (SW1) Location

command down the Crown Bus. The 8-segment DIP switch (SW1) shown above

1

IQ-P.I.P.-DSP-PIP2

Page 10

has SIPS installed;

IQ-P.I.P.-DSP

IQ

SW1

has SIPS removed.

Fig. 3.2 IQ Address Switch (SW1) Values

“dumb” balanced audio input. 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).

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.

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.

A convenient series of IQ address tables are included in Section 7. The tables show the switch

Reference Manual

IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems

settings for all 250 addresses.

2. Set the jumpers JP4 and JP5. If the

DSP

is being installed into a

Macro-Tech 5000VZ

PIP2

amplifier, move both

IQ–P.I.P.–

-compatible or

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.

3.2 Prepare the Amplifier

3. Turn down the level controls (full counter- clockwise) and turn off the amplifier.

4. Disconnect the amplifier’s power cord.

5. Remove the existing amplifier back panel (two screws). For ers this may involve disconnecting the

PIP2

input adapter (Figure 3.4). If a

P.I.P .

or cover panel from the

PIP2

P.I.P .

PIP2

amplifi-

from a

input adapter is already present, do not remove the ribbon cables from the adapter. Otherwise you will have to reconnect them in Step 9.

6. Set the amplifier input sensitivity to 0.775 V. (See the amplifier’s

3.3 Install the

Reference Manual

IQ–P.I.P.–DSP

.)

into the

Amplifier

7. Carefully ground yourself to the chassis of the amplifier before installing the a good idea to maintain ground contact between yourself and the amplifier while inserting the module into the

P.I.P.

-compatible amplifiers) or the

tor (

PIP2

-compatible amplifiers).

8. Install the

IQ–P.I.P.–DSP

P.I.P.

Standard P.I.P. Amplifiers: IQ–P.I.P.–DSP

in the

P.I.P.

push the unit in until it is seated against the mounting bracket (see Figure 3.3).

PIP2 Amplifiers:

Connect the

to the two input cables of the amplifier (Figure

Fig. 3.3 Installation into a Standard P.I.P. Amplifier

IQ–P.I.P.–DSP

. It is

card rails (standard

PIP2

connec-

into the amplifier:

Align the edges of the

card rails and firmly

PIP2

input adapter

BACK PANEL

OF AMPLIFIER

P.I.P.

MODULE

3.4). Notice that the be positioned with the

PIP2

input adapter should

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

FROM AMPLIFIER

Fig. 3.4 PIP2 Input Adapter Connection

PIP2 ADAPTER

B A

18 PIN (B)

B

20 PIN (A)

A

(B) is connected. Both ribbon cables should extend below the

Next, insert the edge connector of the

DSP

into the

Fig. 3.5 Installation into a PIP2 Amplifier

and insert the assembly into the

PIP2

input adapter.

PIP2

input adapter (see Figure 3.5)

BACK PANEL

OF PIP2

AMPLIFIER

PIP2 ADAPTER

P.I.P.

O

M

P.I.P.

IQ–P.I.P.–

LE

U

D

opening in

the back of the amplifier.

9. Tighten the two the

P.I.P.

is secured to the amplifier back panel.

P.I.P.

mounting screws until

3.4 Install the Wiring

10. Connect the via the Crown Bus. See Section 3.6 for full in-

structions.

11. Connect the audio signal wiring to the

P.I.P.–DSP

and, if desired, the phone jack daisy chain wiring. See Section 3.7 for full instructions.

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 regulations (see Section 3.7).

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

IQ–P.I.P.–DSP

to the

IQ System

IQ–

. This includes the XLR input wiring

Note:

Reference Manual

Page 11

IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems

Section 3.8 for more information.

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

trolled input attenuators on the

. If needed, use the software-con-

IQ–P.I.P.–DSP

to re-

duce the audio levels.

14. Configure the amplifier scale factors.

P.I.P .

-compatible amplifiers only—the scale factors for

PIP2

-compatible amplifiers are set automatically.) It is

(Standard

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 amplifier 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

Manual

for details). In the appropriate input area of the

User’s

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

Amplifier

Model

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 Macro-Tech 1200 Macro-Tech 2400 Macro-Tech 24x6 Macro-Tech 3600VZ Macro-Tech 36x12 Macro-Tech 5000VZ Macro-Tech 10000 Reference I Reference II PIP2-Compatible (Auto)

Fig. 3.6 Amplifier Scale Factor Values

and Output Signal Pad Settings

Scale Values (Decimal)

Channel 1

57 45 40 30 27 44 39 30 30 14 14 30 24 17 30 51

Channel 2

57 45 40 30 27 44 39 24 44 14 39 30 24 17 30 51

Output Signal Pads

(JP4, JP5)

IN IN IN IN IN IN IN IN IN IN IN

OUT

IN IN IN

OUT

along with the settings of jumpers JP4 and JP5.

Note: Since it is possible to configure one channel 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.

3.6 A Closer Look at Crown Bus Wiring

The

IQ–P.I.P.–DSP

must be connected to a Crown Bus

IQ2

loop having an the

IQ System

-compatible IQ interface in order for

to control or monitor it. The Crown Bus is a serial communication loop designed to transmit IQ commands and data. As implemented in the

DSP

, it is a 20 milliamp current loop operating at a

IQ–P.I.P.–

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 accept 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 following list contrasts those advantages with those of a single loop.

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.

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).

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.

• 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.

• Add an IQ Repeater for very long loops—greater

Page 12

Reference Manual

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 capacitance, the longer the loop can be. Unshielded wire typically has less capacitance.

• 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 normally 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.

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.

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

should be connected to an IQ component with a screw terminal plug.

IQ–P.I.P.–DSP Output

41

23

GND 1

Output (+) 2

Not used 3 Not used 4

O

ptional Shield

Figure 3.8 IQ–P.I.P.–DSP Output Connection to an

IQ Component with a Screw Terminal Plug Connector

IQ Mixer

OUT IN

+ – + –

Output (+) Output (–)

Input (+) Input (–)

Optional Shield

Figure 3.9 An IQ Component with Screw Terminal

Plug Connected to the IQ–P.I.P.–DSP Input

IQ Mixer

OUT IN

+ – + –

Output (+) Output (–) Input (+) Input (–)

IQ–P.I.P.–DSP Input

5

4

1

2

3

1 Input (–) 2 Input (+) 3 GND 4 Not used 5 Not used

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.

IQ Interface

41

23

GND 1

Output (+) 2

Not used 3 Not used 4

5

4

Optional Shield

1

2

3

1 Input (–) 2 Input (+) 3 GND 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

P.I.P.–DSP

to other IQ components with different

IQ–

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

Reference Manual

IQ–P.I.P.–DSP

IQ Component

CROWN BUS LOOP

IQ Component

Fig. 3.10 Crown Bus Wiring “Loops” from the

Output to the Input of Each IQ Component

Page 13

IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems

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:

Fig. 3.11 Audio Input Wiring

We strongly recommend that balanced wiring be used if possible. Some important guidelines follow:

• Always use shielded wire. The higher the density of the shield (the outer conductor), the better. Spiral wrapped shield is not recommended.

• 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 together. For example, do not connect the audio ground to the Crown Bus ground.

• Turn the entire sound system off before changing 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.

Balanced phone jacks are provided for “daisy chain” audio output connection. The audio cables should be wired in one of the following manners:

plifier (if provided). The phone jacks are wired in parallel with the output of the plifier. Any audio signal fed into the phone jacks could feed back into the output of the 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

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

Manual

unwanted subsonic frequencies, radio frequency inter ference, ground loops, and feedback oscillation.

. It contains helpful information on preventing

to the inputs of other amplifiers.

P.I.P.

connector inside the am-

IQ–P.I.P.–DSP

Reference

or

and gen-

Owner‘s

3.8 When External Power is Needed

The

IQ–P.I.P.–DSP

mA at –24 VDC. Many Crown amplifiers can provide this power via the these

IQ–P.I.P.-DSP

nal power supply is needed. Amplifiers which can supply adequate power include all

Macro-Tech 5000VZ

and all installations into 50-Hz versions of ers (excluding the ommends use of the S4 version of these amplifiers. Please contact Crown Technical Suppor t for more information about power supply options for the 50-Hz

PIP2

Macro-Tech

Other Crown able to supply the full 320 mA of +24 VDC power for the

IQ–P.I.P .–DSP

the AC mains are that feed them and how hard the amplifiers are driven. This includes the

600, 1200, 2400, 24x6, 3600VZ

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.

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.

mini jack is provided on the

DSP

for external power connection.

draws 320 mA at +24 VDC and 160

P.I.P.

edge connector inside. For

/amplifier combinations, no exter-

Com-Techs

, all

Studio Reference

-compatible amplifiers. For

Macro-Tech

Macro-Tech 5000VZ),

versions.

P.I.P.

-compatible amplifiers may not be

, depending on how well regulated

and

36x12

Note: Actually, external

P.I.P.

panel of the

, all

amplifiers

IQ–P.I.P.-DSP

amplifi-

Crown rec-

Macro-Tech

. We sug-

A

IQ–P.I.P.–

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 interference) core to the daisy chain cable(s). A core, large enough to snap over both cables, is provided.

IMPORTANT: Do not feed a signal into the phone jacks on the

Page 14

IQ–P.I.P.–DSP

or the back panel of the am-

IMPORT ANT: The from an external power supply if the enable switch of the amplifier is turned off. The amplifier is required to provide –24 VDC.

CAUTION: If external power is needed, use an individual, isolated power supply for each Do not attempt to share a common power supply with multiple modules may be damaged.

IQ–P.I.P.–DSP

modules or the

cannot be operated

IQ–P.I.P.–DSP

Reference Manual

.

IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems

4 Operation

With an can be monitored and controlled from a remote location through the use of an module features enable the amplifier to function automatically. For example, the 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.

In addition, the 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

Most of the following features can be controlled or configured using IQ software running on an host computer. Commands are transmitted via an IQ interface to the specified IQ component (an 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.

4.1 Power/Standby Indicators

(IQ for Windows software only.) The power/standby indicators allow you to monitor the power and standby (mute) status of each channel via ware.

4.2

The Input/Output Comparator of the amplifier can be monitored by the The provide you distortion of any kind equals or exceeds 0.05%, the circuit will cause an indicator on the front of the amplifier to flash. By monitoring these events, the

System

computer to alert a user that distortion is occurring.

4.3 Input Signal Level Monitor

The input signal level of each channel can be monitored by IQ software. This monitor feature has a range from +20 dBu to –40 dBu in ½-dB steps.

IQ–P.I.P.–DSP

module, your Crown amplifier

SmartAmp

IQ System

™

capabilities which will

can automatically turn off

features distinctive digital

. This P.I.P.

IQ System.

IQ System

IQ for Windows

IOC

Event Monitor

(IOC®)

of each channel

IQ System

IOC

circuitry acts as a sensitive distortion meter to

proof of distortion-free performance

can flash an indicator on the screen of the host

IQ2

soft-

. If

IOC

IQ

4.4 Output Signal Level Monitor

The output signal level of each channel of the amplifier can be monitored by the 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 output voltage for all other amplifiers.)

The output signal of some amplifiers must be padded before the accomplished by setting jumpers JP4 and JP5 on the IQ circuit board to the “IN” position. Only the

Tech 5000VZ

require these pads. Set jumpers JP4 and JP5 to the “OUT” position for them (see Figure 3.6).

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

model) with both channels in the 70-V output mode.

4.5

The Output Device Emulation Protection 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 amplifier cannot produce any more power and limiting” will begin to limit the drive level to the output devices, thereby protecting them from too much stress. (See the amplifier’s more information about

4.6 Power Control

.

Each channel’s high-voltage supply can be independently turned on and off with the Power control. The

Com-Tech

IQ–P.I.P.–DSP

ODEP

Level Monitor

IQ System

and

PIP2

Reference

is used to set this control.

IQ System

amplifiers or the rated 8 ohm

can scale them. This is

-compatible amplifiers do not

Com-Tech

. This monitor

amplifier (any

(ODEP®)

ODEP

level reaches 100%, the

or

Owner’s Manual

ODEP

and how it works.)

4.7 Signal Mute

The output signal of each channel can be independently muted by the typically provides 80 dB or more of attenuation.

IMPORTANT: The daisy chain outputs are also muted by this function.

IQ System

. The function

Macro-

level

“ODEP

for

Reference Manual

Page 15

IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems

4.8 Polarity Inverter

The polarity of the input signal of each channel can be independently inverted by the

IQ System

.

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 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 functions. Each input attenuator has a range from 0 dB to –80 dB in ½ dB steps. (Zero equals no attenuation.)

IQ System

ODEP

conservation

. They may

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.

4.10 Input Protection Limiter

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.

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.

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.

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.

4.11 Auto

An Auto function (Auto System Actuate or “ASA”) is available to provide consistency with other IQ

components in the

System

disable many of the functions in the functions that are enabled/disabled by the Auto control are: input signal compressor/limiter, output limiter, auto standby and

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

Manual

the Auto function.

and it serves as a toggle to quickly enable or

for your IQ software for more information about

IQ System

ODEP

Limiter warning.

. It is controlled by the

IQ–P.I.P.–DSP

. The

User’s

IQ

4.12 Input Signal Compressor/Limiter

An input signal compressor/limiter is available for each channel. Each one is controlled by the has five parameters:

Input Compressor: Turns this function on/off. Threshold: Sets the threshold, in dB, above which

the compressor acts. The level is measured at the input to the 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.

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.

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.

Ratio: Sets the compression ratio for the compressor. The range is 1, 2, 4, 8, 16, 32, ¥ to 1.

P.I.P.

and corresponds to the level

IQ System

and

Note: 1:1 is the same as “off.”

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 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

P.I.P.s

with

SmartAmp

features) or

Page 16

Reference Manual

IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems

output limiters are controlled by the five parameters:

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.

Ratio: The compression ratio is fixed at ¥:1.

IQ System

and has

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 themselves in just a few years due to reduced energy costs. There are four parameters which control this feature:

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.

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.

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 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.

IQ Systems

IQ System

can pay for

. The turn-on

4.15

ODEP

Limiter

The effects of output devices (as described in Section 4.5) are very audible. To overcome this, an 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:

ODEP

Conservation: Turns this function on/off.

ODEP

percent, above which the conservation limiting will begin. The range is from 1 to 100%.

ODEP

Conservation Amount: Sets the amount,

in dB, that the input signal level will be attenuated for each percentage point that the exceeds the trigger level. The range is ½ to 6 dB in ½-dB steps.

ODEP

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

DSP

taking 10 seconds to release 10 dB of attenuation. The range for this parameter is 200 milliseconds to 30 seconds.

4.16 Excessive

A “trigger” can be set that will cause a warning message to appear on the host computer’s screen if too many time. Three parameters control this feature:

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.

IOC

Error Count: Sets the number of

that must occur during the preceding time interval before a warning message is displayed.

“IOC event” is one complete on-off-on cycle.

range is from 1 to 100 events per unit time

4.17 Excessive

The user can set a “trigger” that will cause a warning message to appear on the host computer’s screen if the

ODEP

It is generally assumed that a sudden rise in the

“ODEP

Trigger Level: Sets the

Conservation Release Time: Sets the

limiting” the drive level of the

ODEP

limiter is available

ODEP

level, in

ODEP

level

IQ–P.I.P.–

IOC

Warning

IOC

events occur over a specified length of

IOC

events

Note: An

The

ODEP

Warning

level ever rises above a predetermined level.

ODEP

Reference Manual

Page 17

IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems

level would indicate a sudden decrease in the load impedance—such as a shorted speaker cable or shorted loudspeaker. There are two parameters which control this feature:

ODEP

Short Detect: Turns this function on/off.

ODEP

Short Level: Sets the

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%.

ODEP

level above

4.18 Fault Warning

Fault conditions can be monitored by the 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 tion that is “locked” on, a high voltage supply (VCC) that reports a normal condition and no signal at the output of the amplifier. monitor a “fault” signal from the amplifier while standard

P.I.P.

-compatible amplifiers deduce a “fault” condition from the aforementioned symptoms. There are two parameters which control this feature:

Fault: Turns this function on/off. 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 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.

PIP2

-compatible amplifiers

IQ System

IOC

error to

condi-

4.19 Signal Delay

A signal delay is available for each channel. Each one is controlled by the

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.)

Note: The signal delays are not disabled by the ASA control.

IQ System

and has one parameter:

filter cells). There are seven different filter types from which to choose—all controlled by the

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)

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

IQ System:

quadratic equations which mathematically describe each filter implemented in the digital signal processor.

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.

A description and list of the parameters of each filter type are presented next:

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 highpass crossover filter to create a band-pass crossover filter for driving mid-range drivers.

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.

4.20 Programmable Filters

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

High-Pass Crossover Filter

Description: This filter rolls off low frequencies at a rate determined by the shape parameter. The

Reference Manual

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.

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.

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.

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.

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 highpass filter to roll of the frequencies below the center frequency.

equalization filters can be cascaded to form unique inter-order crossover-type filters.

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.

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.

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.

Note: The low and high-pass

It has a fixed 1st-order slope (6 dB/octave).

Low-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 lowpass 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 highpass equalization filters can be cascaded to form unique inter-order crossover-type filters.

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.

Reference Manual

High-Pass Shelving Equalization Filter

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 –3 dB corner frequency of the filter. The range is 20 Hz to 20 kHz.

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.

Page 19

IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems

4.21 Memory Backup

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.

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

reset to 0 dB, resulting in the loudest possible signal.

loses power, the attenuators will be

4.22 Amp Mode

The stereo/mono mode of the amplifier can be stored into the unit’s memory so 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

amp mode setting is controlled by the

IQ System

is aware of 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.

4.26 Data Signal Presence Indicator

A Data Signal Presence Indicator (DSPI) is provided on the front panel. It flashes whenever commands addressed to the forced to stay on by IQ software to assist with troubleshooting of an

IQ–P.I.P.–DSP

IQ System

are received. It can be

.

4.27 Reset

A recessed reset switch, accessible from outside the

P.I.P.

panel (see Figure 2.1), enables the 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.

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.

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 reprogrammed by an “user default” settings.

WARNING: Pressing the reset switch can cause the

IQ–P.I.P.–DSP

that the level controls of the amplifier be turned down before pressing the reset switch.

to emit a brief pulse. We recommend

IQ System

P.I.P.-FX

or it is toggled to the

IQ–P.I.P.–DSP

until it is

4.24 IQ2 Protocol Support

The

IQ–P.I.P.–DSP

makes it possible for the user to design custom graphic display modules to control and monitor the unit with IQ2-compatible IQ software.

uses Crown’s IQ2 protocol. This

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

Page 20

IQ–P.I.P.–DSP

loses power.

4.28 User Default Settings

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 documentation of your IQ software for instructions on setting the “user default” values.

Reference Manual

IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems

5 Technical Information

The purpose of the extensive signal processing capabilities and to enable an

IQ System

to control and monitor a 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 Audio Signals

5.1.1 Hardware Processing (see Figure 5.1)

Balanced and unbalanced audio signals enter the module at the XLR connectors. From these connectors, the signals are RFI filtered and fed into a balanced to singleended conversion stage. Then they are sent to a monitor input (discussed below) and also to a DCA (Digitally Controlled Attenuator) for gain ranging via the is essential because the DSP (Digital Signal Processing) system has limited voltage headroom.

After the DCA, both channels are sent to an 18-bit dualchannel ADC (Analog to Digital Converter). The ADC provides 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 dualchannel device which demultiplexes Channel 1 and 2 and

AUDIO

MONITOR

INPUTS

CH 1

AUDIO

INPUTS

CH 2

CH 1

AMPLIFIER

OUTPUTS

CH 2

IQ–P.I.P.–DSP

PEAK

DETECTOR

PEAK

DETECTOR

SWITCHABLE

INPUT PAD

SWITCHABLE

INPUT PAD

PEAK

DETECTOR

PEAK

DETECTOR

is to provide

P.I.P.

-compatible

IQ System

MONITOR

AUDIO MULTI-

PLEXER

. This

LOG AMP

EXTERNAL

RESET

DSPI

converts the bits to volts. The DAC also provides low-pass filtering. The output of the DAC drives the amplifier inputs

P.I.P.

via the

edge card connector as well as the “daisy

chain” outputs.

5.1.2 Signal Flow Processing (see Figure 5.2)

The audio signals are attenuated via the input attenuators, providing system gain setting as well as gain ranging for the DSP system. The input compressor/limiters then allow dynamic scaling of signals for many applications via common parameters such as threshold, ratio,

ODEP

etc. The

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.

The signal is then fed into eight cascaded fully programmable 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 information from the data acquisition system. Common limiter

STATUS

MONITOR INPUTS

FUTURE HDWR

IOC

Vcc

ODEP

IQ ADDRESS

SWITCH

INPUT MUX

A/D CONV.

MICROCONTROLLER

AMP REMOTE

STANDBY

ISO. INPUT RECEIVER

OUTPUT DRIVER

DROP-OUT

RELAY

CROWN BUS

SERIAL

DATA INPUT

CROWN BUS

SERIAL

DATA OUTPUT

BALANCED AUDIO INPUTS

EXTERNAL POWER

Reference Manual

SUPPLY INPUT

CH 1

CH 2

P.I.P. POWER SUPPLY

DIGITALLY

CONTROLLED

2-CHANNEL

ATTENUATOR

ANALOG TO

DIGITAL

CONVERTER

DIGITAL SIGNAL

PROCESSOR

EXTERNAL

MEMORY

DIGITAL TO

ANALOG

CONVERTER

Fig. 5.1 IQ–P.I.P.–DSP Hardware Circuit Block Diagram

DAISY-CHAIN

CH 1

TO AMPLIFIER AUDIO INPUTS

CH 2

DAISY-CHAIN

BALANCED

OUTPUT

BALANCED

OUTPUT

Page 21

IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems

parameters are used here such as threshold, attack time, etc. Next, the output limiter is processed through controllable polarity inverters. The last processing section is an output muter after which the signal is sent to the main amplifier for voltage and current amplification.

All parameters are continuously controllable via the

System

or can be set and will continue to operate.

IQ

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

supplies. These functions are controlled using ports on the 6811 microprocessor and some external support circuitry. The audio level is controlled by the 6811 microprocessor 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.

multiplexer into a logarithmic conversion circuit for dynamic 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.

5.2.2 Status Signals

The status signals that are monitored are status and VCC status. These signals enter the through a buffer stage, and are fed into the A/D converter on the 6811 microprocessor. The signals are then converted and sent to the host computer via the Crown Bus.

can turn on/off the high-voltage power

The detector outputs are then fed through a

ODEP

level,

IOC

P.I.P.

, pass

INPUT

ATTENUATOR

INPUT

COMPRESSOR

ODEP CONSER-

VATION LIMITER

INPUT PROTEC-

TION LIMITER

5.2.3 DSPI Control

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

The

IQ–P.I.P.–DSP

Communications

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 microprocessor 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 main unbroken—even if power to the

P.I.P.

, the Crown Bus will re-

P.I.P.

is lost.

5.4 Microprocessors and Reset Switch

The “brains” of the 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

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

System

software on the host computer.

IQ–P.I.P.–DSP

are contained in its two

is designed to provide an “automatic

IQ

Page 22

ATTENUATION

RATIO

RELEASE TIME

FLTR

3

ON/OFF

4

FILTER TYPE

ON/OFF

TRIGGER LEVEL

FLTR

5

FILTER Q

FILTER GAIN

FILTER FREQUENCY

RELEASE TIME

CONSERVATION AMOUNT

FLTR

8

7

6

SIGNAL

DELAY

OUTPUT

LIMITER

ON/OFF

THRESHOLD

ATTACK TIME

RELEASE TIME

POLARITY INVERTER

FLTR

ON/OFF

THRESHOLD

ATTACK TIME

FLTR

1

2

Fig. 5.2 IQ–P.I.P.–DSP Audio Signal Flow Block Diagram

INVERT / NORMAL

DAISY CHAIN

OUTPUT

MAIN

OUTPUT

MUTER

MUTE / UNMUTE

IQ-P.IP.-DP AMPLIFIER

AMPLIFIER

Reference Manual

IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems

6 Specifications

General

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 standalone mode.

ened paper clip through the settings (except the amplifier output voltage scale factors) 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 disable the output voltage scaling circuitry.

Connectors: Crown Bus Input: Locking 5-pin female DIN connector. Crown Bus Output: Locking 4-pin female DIN connector. Audio Input: Balanced 3-pin female XLR connector for each channel. Audio “Daisy Chain” Output: ¼-inch balanced (tip, ring, sleeve) phone jack. External Power: Mini jack.

Indicators: A yellow DSPI (Data Signal Presence Indicator) flashes when a valid IQ command is received from the be forced on to facilitate rapid troubleshooting of Crown Bus wiring.

A Reset switch, accessible with a straight-

P.I.P.

panel, resets all

IQ System

via the Crown Bus. The DSPI can

Transmission Distance: Variable from 200 to 3000 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

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.

Digital to Analog Conversion (DAC): 18-bit. 8x interpolated Linear Phase FIR reconstruction filter. 44.1 kHz sample rate input.

IQ–P.I.P.–DSP

module, itself.

Nonvolatile Memory Backup: EEPROM capable of 75,000 typical writes.

Power Requirements: Power draw: 320 mA @ +24 VDC and 160 mA @ –24 VDC. When installed into a Crown ±24 VDC from the amplifier. No further power is required if the unit is installed in a els),

PIP2

tional power in other amplifiers. External power should be +24 VDC with a minimum of 200 mA (400 mA recommended for safety margin).

P.I.P.

-compatible amplifier, the unit receives

Com-Tech

Macro-Tech 5000VZ

-compatible amplifier. The unit may require addi-

or

10000, Reference

(all mod-

or any

Crown Bus Data Communication

Protection: If communication is lost, the unit will continue to function with the last commands received.

Data Rate: 38.4 K BAUD. Data Format: Serial, binary, asynchronous; 1 start bit;

1 stop bit; 8 data bits; no parity. Crown Bus Interface Type: Optically isolated 20

milliamp serial loop.

Input Impedance: Nominally 24 K ohms balanced and 12 K ohms unbalanced.

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).

Total Harmonic Distortion (THD) + Noise: <0.05% (typical). <0.1% (worst case at signal level and signal frequency extremes).

Output Impedance: Nominally 150 ohms (balanced). Maximum Output Level: +4 dBu.

Operation: Half duplex. Intelligence: 8-bit, 8 MHz, 2 MIPS Motorola 6811 mi-

croprocessor.

Reference Manual

IQ System

Input/Output Monitor Accuracy: Typically ±1 dB.

Data Acquisition

Page 23

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 address. The valid addresses are 1 to 250. Remember that address “0” (zero) will put the alone mode where it is invisible to the 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.

IQ–P.I.P.–DSP

IQ System

into a stand-

and acts

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

P.I.P.–DSP

as shown. See Section 4.1 also.

IQ–

IQ

Address

0 1 2 3 4 5 6 7 8

9 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

IQ Address Switch

1

2

3

4

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF

ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON

OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF

IQ

5

6

7

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

8

OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF

Address

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

IQ Address Switch

1

2

3

4

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

OFF OFF OFF OFF OFF OFF

ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON

OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF

ON ON ON ON

IQ

5

6

7

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

8

OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF

Address

84 85 86 87 88 89 90 91 92 93 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

IQ Address Switch

1

2

3

4

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

ON ON ON ON ON ON ON ON ON ON ON ON

OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF

ON ON ON ON ON ON ON ON ON ON ON ON ON ON

5

6

7

8

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

Page 24

Fig. 7.1 IQ Address Switch (SW1) Settings from 0 to 125

Reference Manual

IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems

IQ

Address

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

IQ Address Switch

1

2

3

4

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON ON

OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF

ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON

OFF OFF OFF OFF OFF OFF OFF OFF

5

IQ

6

7

8

Address

ON

OFF

168

ON

OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF

ON ON ON ON ON ON ON ON

ON

OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF

OFF

ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON

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

IQ Address Switch

1

2

3

4

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

5

OFF OFF OFF OFF OFF OFF OFF OFF

ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON

OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF

ON ON

ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON

OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF

IQ

ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON

8

Address

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

6

7

OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF

ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON

IQ Address Switch

1

2

3

4

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

ON ON ON ON ON ON ON ON ON ON ON ON ON ON

OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF

ON ON ON ON ON ON ON ON ON ON ON

5

6

7

8

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

Reference Manual

Fig. 7.2 IQ Address Switch (SW1) Settings from 126 to 250

Page 25

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.

8.1 Worldwide Service

Service may be obtained from an authorized service center. (Contact your local Crown/Amcron representative 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 necessary paperwork and repair.

Remember to transport your unit in the original factory pack.

8.2 North American Service

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 information 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.

Always use the original factory pack to transport the unit.

form that follows and enclose it inside your unit’s shipping pack. Do 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 packing material will not be sufficient to withstand the stress of shipping. Do not use loose, small size

packing materials.

3. Do

not ship the unit in any kind of cabinet (wood or metal). Ignoring this warning may result in extensive damage to the unit and the cabinet. Accessories are not needed—do not send the

Reference

hardware.

If you have any questions, please call or write the Crown Technical Support Group.

or

not send the service informa-

Owner’s Manual

, cables and other

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 shipping 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.

Your repaired unit will be returned via UPS ground. Please contact us if other arrangements are required.

Factory Service Shipping Instructions:

1. When sending a Crown product to the factory for service, be sure to fill out the service information

Crown Audio Division

Technical Support / Factory Service Plant 2 SW , 1718 W. Mishawaka Rd., Elkhart, Indiana 46517 U.S.A.

Telephone:

Facsimile:

Fax Back:

Internet: Email:

219-294-8200 800-342-6939 (North America,

Puerto Rico, and Virgin Islands only)

219-294-8301 (Technical Support) 219-294-8124 (Factory Service)

219-293-9200 (North America only) 800-294-4094 (North America only) 219-294-8100 (International) http://www.cr ownaudio.com iqsupport@crownintl.com

Page 26

Reference Manual

IQ–P.I.P.–DSP Programmable Input Processor with DSP for IQ Systems

Crown Factory Ser vice 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.)

______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________

______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________

Detach and send with unit.

______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________

Other equipment in your system: _________________________________________________________

______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________

If warranty has expired, payment will be:

Card Number:___________________________ Exp. Date:_______ Signature:____________________________

❏ ❏

❏ Cash/Check

❏ ❏

❏❏

❏ VISA

❏❏

❏ MasterCard

❏❏

❏ C.O.D.

❏❏

ENCLOSE THIS PORTION WITH THE UNIT. DO NOT MAIL SEPARATELY.

Reference Manual

Page 27

Crown Audio IQ P.I.P.-DSP User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual