Leitch 880 Series User manual

Audio Distribution Amplifiers
Instruction Manual
Edition H
P880 ADA MAN
880 Series

Experience an Integrated Content Environment
Leitch Technology is uniquely capable of meeting the needs of customers with a full range of products that provide the experience
of an Integrated Content Environment — a streamlined workflow for the production, processing, transmission and management
of content.
The area of content production has seen increases in source and output formats, effects, layers and volume of material to be
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VelocityQ
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running on Quattrus
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hardware, including a new interface style featuring the unique EyeCon View, has received
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Leitch’s new NEXIO
™
server system, a modular, scalable and highly cost-effective storage infrastructure for news and transmission
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industry-leading productivity — with the introduction of Ingest Control Manager
™
, NewsFlash
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server-based NLE,
and BrowseCutter
™
II low-resolution editing system — to provide the fastest and most effective workflow today.
The advent of fully Integrated Content Environments has led to significant efficiency improvements in workflow, with processing
and monitoring now integrated and transparent.
NEO
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, Leitch’s advanced processing platform, not only hosts single-function modules, but also consolidates multiple functions on
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digital video recorder, LogoMotion
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II branding tool and the NEO SuiteView multi-source display processor. More functionality can be achieved by customers’
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Panacea
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®
Gold provides
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integrated with Leitch’s advanced Command Control System (CCS
™
).
Advancements in digital technologies have enabled more channels, in different content formats, over multiple distribution
systems. Customers now seek to achieve their vision of a fully Integrated Content Environment to supply multiple distribution
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Leitch’s NEXIO transmission server, which supports multiple compression formats in both standard and high-definition resolution,
will also support ASI interface and has the ability to record, process and playback MPEG transport streams.
Leitch’s Opus
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master control switcher offers an array of effects and has the ability to control up to 16 on-air channels. Opus
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Integrated Content Environments offer the greatest opportunity for productivity and performance gains when employing content
management and control applications that place content, operations or remote locations under common software controls.
A major workflow enhancement is Leitch’s Ingest Control Manager
™
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, winner of NAB 2003’s highest awards for control and monitoring of content quality, and the
CCS
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soft real-time system provide open access through standard protocols to components of a networked system.
Integrated
Content
Environment

880 Series
Audio Distribution Amplifiers
Instruction Manual
Edition H
June 2004

880 Series Audio Distribution Amplifiers Instruction Manual iii
Preliminary—Contents are proprietary and confidential. Do not photocopy or distribute.
Preface
Manual Information
Purpose
This manual provides information on the features and applications for the
Leitch 880 series audio distribution amplifier.
Audience
This manual is written for technicians and operators responsible for installation,
setup, maintenance, and/or operation of the product, and is useful to operations
personnel for purposes of daily operation and reference.
Revision History
Applications
The 880 series audio distribution amplifier platform is ideal for
space-constrained operations demanding full local and remote control
capabilities in a routing solution.
Edition Date Comments
Edition D March 2001 •Changedformat
• Removed Theory of Operation and
schematics
• Consolidated Specifications into one
separate chapter
Edition E October 2001 Made changes to figure illustrating FR-883/
FR-884 back panel connections
Edition F November 2002 Added configuration information for
APD-880-0
Edition G August 2003 Added specifications for ASD-880-GR stereo
audio distribution amplifier module
Edition H June 2004 Made changes to figure illustrating FR-882-M
back pannel connections

iv 880 Series Audio Distribution Amplifiers Instruction Manual
Preface
Preliminary—Contents are proprietary and confidential. Do not photocopy or distribute.
These products are perfect for
• Television production facilities
• Cable operators
• Production and post-production facilities
• Outside broadcast vans/trucks
• DBS satellite operations
• Webcasters
• Telcos where professional end-users require a small, flexible, high
quality routing matrix with the ability to mix and match signal formats
and/or signal processing functions within the same frame
Writing Conventions
To enhance your understanding, the authors of this manual have adhered to the
following text conventions:
Obtaining Leitch Documents
Leitch documents can be viewed or downloaded from the Leitch Web site at
http://www.leitch.com (go to Support>Documentation). Alternatively, contact
your Leitch customer service representative to request a document.
Term or
Convention Description
Bold Indicates dialog boxes, property sheets, fields, buttons,
check boxes, list boxes, combo boxes, menus, submenus,
windows, lists, and selection names
Italics Indicates email addresses, the names of books or
publications, and the first instances of new terms and
specialized words that need emphasis
CAPS Indicates a specific key on the keyboard, such as ENTER,
TAB, CTRL, ALT, or DELETE
Code Indicates variables or command-line entries, such as a
DOS entry or something you type into a field
> Indicates the direction of navigation through a hierarchy
of menus and windows
hyperlink Indicates a jump to another location within the electronic
document or elsewhere
Internet address Indicates a jump to a Web site or URL
Note
Indicates important information that helps to avoid and
troubleshoot problems

880 Series Audio Distribution Amplifiers Instruction Manual v
Preface
Preliminary—Contents are proprietary and confidential. Do not photocopy or distribute.
Unpacking/Shipping Information
Unpacking a Leitch Product
All Leitch products have been carefully inspected, tested, and calibrated before
shipment to ensure years of stable and trouble-free service.
1. Check the equipment for any visible damage that may have occurred during
transit.
2. Confirm that you have received all items listed on the packing list.
3. Contact your Leitch dealer if any item on the packing list is missing.
4. Contact the carrier if any item is damaged.
5. Remove all packaging material from the product and its associated
components before you install the unit.
Returning a Leitch Product
In the unlikely event that a Leitch product fails to operate properly, please
contact Leitch’s Customer Service Department to obtain a Return Authorization
(RA) number, then send the unit back for servicing.
Keep at least one set of original packaging in the event that a product needs to
be returned for service. If the original package is not available, you can
purchase replacement packaging from Leitch Technology. Otherwise, you can
supply your own packaging as long as it meets the following criteria:
• The packaging must be able to withstand the product’s weight.
• The product must be held rigid within the packaging.
• There must be at least 2 in. (5 cm) of space between the product and the
container.
• The corners of the product must be protected.
If the product is still within the warranty period, Leitch Technology will return it
to you by prepaid ground shipment after servicing.
Installation Recommendations
Note the following installation recommendations:
• If this product is rack-mountable, mount it in an appropriate rack using the
provided rack mounting and support equipment.
• Connect each frame to a separate electrical circuit for protection against
circuit overloading.
• If this product relies on forced air cooling, remove all obstructions to the air
flow prior to installing the frame in the rack.
• If this product has a provision for external earth grounding, ground the
frame to earth via the protective earth ground on the rear panel.

vi 880 Series Audio Distribution Amplifiers Instruction Manual
Preface
Preliminary—Contents are proprietary and confidential. Do not photocopy or distribute.
Standards
Compliance and safety standards can be found in Appendix A.
Product Documentation
Throughout this manual, you will see references to the technical documentation
for other Leitch products. You can download PDF versions of these manuals
from our Web site at http://www.leitch.com.
You will need to download Adobe Acrobat Reader to be able to read PDF files.
You can download Adobe Acrobat Reader and its installation instructions free
of charge from the Adobe web site.
Safety
Carefully review all safety precautions to avoid injury and prevent damage to
this product or any products connected to it. You will find a complete list of
safety precautions in Appendix A. Any user-serviceable components (such as
fuses or batteries) are only replaceable by those components listed in the
manual.
IMPORTANT! Only qualified personnel should perform service procedures.
Safety Terms and Symbols in this Manual
Statements identifying conditions or practices that may result
in personal injury or loss of life. High voltage is present.
Statements identifying conditions or practices that can result
in damage to the equipment or other property.
Warning
Caution

880 Series Audio Distribution Amplifiers Instruction Manual vii
Contents
Chapter 1: 880 Series Mounting Frames
Overview .................................................................................................... 1
Mounting Requirements ............................................................................ 2
FR-881 ................................................................................................ 2
FR-882 ................................................................................................ 3
FR-883 ................................................................................................ 3
FR-884 ................................................................................................ 4
Frame Cooling ........................................................................................... 5
Power Consumption ................................................................................... 5
Power Supply ............................................................................................ 6
882PS .................................................................................................. 6
884PS .................................................................................................. 6
Cable Harness Support Bracket ................................................................. 7
Back Panel Connections ............................................................................ 8
FR-881/FR-882 Back Panel Connections ......................................... 10
FR-883/FR-884 Back Panel Connections ......................................... 13
Chapter 2: ADA-816 Audio Distribution Amplifier Module
Overview .................................................................................................. 15
Parts Information ..................................................................................... 16
Chapter 3: ADA-880 Audio Distribution Amplifier Module
Overview .................................................................................................. 17
Parts Information ..................................................................................... 18
Chapter 4: ADA-881 Audio Distribution Amplifier Module
Overview .................................................................................................. 19
Parts Information ..................................................................................... 20
Chapter 5: ADA-882 Stereo Audio Distribution Amplifier
Module
Overview .................................................................................................. 21
Parts Information ..................................................................................... 22

viii 880 Series Audio Distribution Amplifiers Instruction Manual
Contents
Chapter 6: ADA-883 Stereo Audio Distribution Amplifier
Module
Overview .................................................................................................. 23
Parts Information ..................................................................................... 24
Chapter 7: ADA-885 Mono / Stereo Audio Distribution
Amplifier Module
Overview .................................................................................................. 25
Parts Information ..................................................................................... 26
Chapter 8: AMD-880 Mono Audio Distribution Amplifier
Module
Overview .................................................................................................. 27
Parts Information ..................................................................................... 28
Chapter 9: APD-880 Programmable Audio Distribution
Amplifier Module
Overview .................................................................................................. 29
Configuring an APD-880-0 ..................................................................... 30
Parts Information ..................................................................................... 31
Chapter 10: ARG-880 Audio Remote Gain Distribution
Amplifier Module
Overview .................................................................................................. 33
Remote Control Information ................................................................... 34
Parts Information ..................................................................................... 35
Chapter 11: ASD-880 Stereo Audio Distribution Amplifier
Module
Overview .................................................................................................. 37
Parts Information ..................................................................................... 38
Chapter 12: ATG-880 Audio Tone
Generator Module
Overview .................................................................................................. 39
Control Loop ........................................................................................... 40
Output Stage ............................................................................................ 41
Parts Information ..................................................................................... 42
Chapter 13: 882PS/884PS Power Supply Module
Overview .................................................................................................. 43
Installing the 884PS-48 ........................................................................... 44

880 Series Audio Distribution Amplifiers Instruction Manual ix
Contents
Precautions ........................................................................................ 44
Branch Circuit Schematic ................................................................. 44
Suggested Protection Devices ........................................................... 45
Maintaining the 884PS-48 ....................................................................... 46
Precautions ........................................................................................ 46
Connections and Specifications ........................................................ 46
Chapter 14: Specifications
Overview .................................................................................................. 47
FR-881/FR-883 Mounting Frame ........................................................... 48
Electrical ........................................................................................... 48
Mechanical ........................................................................................ 48
FR-882/FR-884/FR-886 Mounting Frame .............................................. 49
Electrical ........................................................................................... 49
Mechanical ........................................................................................ 49
ADA-816 Audio Distribution Amplifier Module ................................... 50
Input .................................................................................................. 50
Output ............................................................................................... 50
Performance ...................................................................................... 50
ADA-880 Audio Distribution Amplifier Module ................................... 51
Input .................................................................................................. 51
Output ............................................................................................... 51
Performance ...................................................................................... 51
ADA-881 Audio Distribution Amplifier Module ................................... 52
Input .................................................................................................. 52
Output ............................................................................................... 52
Performance ...................................................................................... 52
ADA-882 Stereo Audio Distribution Amplifier Module (Low Impedance –
66Ω) ........................................................................................................ 53
Input .................................................................................................. 53
Output ............................................................................................... 53
Performance ...................................................................................... 53
ADA-882 Stereo Audio Distribution Amplifier Module (600ΩImpedance)
54
Input .................................................................................................. 54
Output ............................................................................................... 54
Performance ...................................................................................... 54
ADA-883 Stereo Audio Distribution Amplifier Module ........................ 55
Input .................................................................................................. 55
Output ............................................................................................... 55
Performance ...................................................................................... 55
ADA-885 Mono/Stereo Audio Distribution Amplifier Module (Low
Impedance – 66Ω) ................................................................................... 56
Input .................................................................................................. 56
Output ............................................................................................... 56

x 880 Series Audio Distribution Amplifiers Instruction Manual
Contents
Performance ...................................................................................... 56
ADA-885 Mono/Stereo Audio Distribution Amplifier Module (600Ω
Impedance) .............................................................................................. 57
Input .................................................................................................. 57
Output ............................................................................................... 57
Performance ...................................................................................... 57
AMD-880 Mono Audio Distribution Amplifier Module ........................ 58
Input .................................................................................................. 58
Output ............................................................................................... 58
Performance ...................................................................................... 58
AMD-880 Mono Audio Distribution Amplifier Module (600ΩImpedance)
59
Input .................................................................................................. 59
Output ............................................................................................... 59
Performance ...................................................................................... 59
APD-880 Programmable Audio Distribution Amplifier Module ........... 60
Input .................................................................................................. 60
Output ............................................................................................... 60
Performance ...................................................................................... 60
APD-880 Programmable Audio Distribution Amplifier Module (600Ω
Impedance) .............................................................................................. 61
Input .................................................................................................. 61
Output ............................................................................................... 61
Performance ...................................................................................... 61
ARG-880 Audio Remote Gain Distribution Amplifier Module ............. 62
Input .................................................................................................. 62
Output ............................................................................................... 62
Performance ...................................................................................... 62
ASD-880 Stereo Audio Distribution Amplifier Module ......................... 63
Input .................................................................................................. 63
Output ............................................................................................... 63
Performance ...................................................................................... 63
ASD-880 Stereo Audio Distribution Amplifier Module (600ΩImpedance)
64
Input .................................................................................................. 64
Output ............................................................................................... 64
Performance ...................................................................................... 64
ASD-880-GR Stereo Audio Distribution Amplifier Module .................. 65
Input .................................................................................................. 65
Output ............................................................................................... 65
Performance ...................................................................................... 65
ASD-880-GR Stereo Audio Distribution Amplifier Module (600Ω
Impedance) .............................................................................................. 66
Input .................................................................................................. 66
Output ............................................................................................... 66

880 Series Audio Distribution Amplifiers Instruction Manual xi
Contents
Performance ...................................................................................... 66
ATG-880 Audio Tone Generator Module ............................................... 67
Appendix A: Safety Precautions, Certifications, and
Compliances
Safety Terms and Symbols in this Manual .............................................. 70
Preventing Electrostatic Discharge ......................................................... 71
Battery Use Warnings ............................................................................. 74
EMC and Safety Standards ..................................................................... 75

xii 880 Series Audio Distribution Amplifiers Instruction Manual
Contents

880 Series Audio Distribution Amplifiers Instruction Manual 1
Preliminary—Contents are proprietary and confidential. Do not photocopy or distribute.
Chapter 1
880 Series Mounting Frames
Overview
The 880 series, 8-output audio distribution amplifiers meet the most demanding
requirements for AM/FM/TV broadcast and program production systems.
Heading the list of the amplifier’s exceptional performance characteristics is the
100 dB S/N ratio. Flat frequency response, carefully controlled roll-off and very
low distortion ensure a virtually transparent transmission path.
The amplifier’s input is overvoltage protected up to 120 volts AC or DC. The
transformerless, balanced input is normally bridging, but can be terminated by
installing a suitable resistor. Unbalanced input is converted to balanced output.
Isolation between modules in the mounting frame is better than 100 dB over the
entire audio frequency band.
The modular concept with two fully wired mounting frame options facilitates
system design. The options are as follows:
• The FR-881/883 mounting frame accepts up to four 880 series audio
distribution amplifier modules. The FR-881 frame accepts one 882PS
power supply while the FR-883 frame accepts one 884PS power supply.
• The FR-882/884 mounting frame accepts up to twelve 880 series audio
distribution amplifier modules. The FR-882 frame accepts two 882PS
power supplies while the FR-883 frame accepts two 884PS power supplies.
A fully loaded frame will operate with a single power supply; however,
Leitch recommends that a second optional power supply be included for
cooler operation and power redundancy.
• The high efficiency, shielded switching power supply accepts line inputs
from 90 to 135 VAC without changing transformer taps.

2 880 Series Audio Distribution Amplifiers Instruction Manual
Chapter 1: 880 Series Mounting Frames
Preliminary—Contents are proprietary and confidential. Do not photocopy or distribute.
Mounting Requirements
All Leitch equipment is carefully inspected and calibrated before shipment to
ensure years of stable and trouble-free service.
•Review“Unpacking/Shipping Information” (page v) in the Preface to this
manual.
• Inspect the equipment for any visible damage which may have occurred
during transit before installation.
• Make sure that all modules are properly seated in the mounting frame.
The mounting requirements of the 880 series frame options are as follows.
FR-881
The FR-881 mounting frame requires 1 unit of rack space: 1¾ in. (44 mm) high
x 19 in. (483 mm) wide x 11 in. (280 mm) deep. This frame can house 4
modules.
Figure 1-1. FR-881
Figure 1-2. FR-881 Back Panel

880 Series Audio Distribution Amplifiers Instruction Manual 3
Chapter 1: 880 Series Mounting Frames
Preliminary—Contents are proprietary and confidential. Do not photocopy or distribute.
FR-882
The FR-882 mounting frame requires 2 units of rack space: 3½ in. (88 mm) high
x 19 in. (483 mm) wide x 11 in. (280 mm) deep. This frame can house 12
modules.
Figure 1-3. FR-882
Figure 1-4. FR-882 Back Panel
FR-883
The FR-883 mounting frame requires 1 unit of rack space: 1¾ in. (44 mm) high
x 19 in. (483 mm) wide x 11 in. (280 mm) deep. This frame can house 4
modules.
Figure 1-5. FR-883
Figure 1-6. FR-883 Back Panel

4 880 Series Audio Distribution Amplifiers Instruction Manual
Chapter 1: 880 Series Mounting Frames
Preliminary—Contents are proprietary and confidential. Do not photocopy or distribute.
FR-884
The FR-884 mounting frame requires 2 units of rack space: 3½ in. (88 mm) high
x 19 in. (483 mm) wide x 11 in. (280 mm) deep. This frame can house 12
modules.
Figure 1-7. FR-884
Figure 1-8. FR-884 Back Panel

880 Series Audio Distribution Amplifiers Instruction Manual 5
Chapter 1: 880 Series Mounting Frames
Preliminary—Contents are proprietary and confidential. Do not photocopy or distribute.
Frame Cooling
The equipment is designed to operate in an ambient temperature range of 32° F
– 122° F (0° C – 50° C). No special cooling arrangements are necessary, but you
should take steps to prevent excessive ambient heat rise in closed, unventilated
equipment racks.
Power Consumption
The FR-881 mounting frame accepts one 882PS power supply while the FR-883
frame accepts one 884PS power supply. The FR-881/883 frame power
consumption is nominally 25VA.
The FR-882 mounting frame accepts one 882PS power supply while the FR-884
frame accepts one 884PS power supply. Both frames are prewired to accept a
second optional power supply for power backup. Their power consumption is
nominally 65VA. It should be pointed out that a fully loaded frame will operate
with a single power supply. However, it is recommended that a second optional
power supply be included for cooler operation and power redundancy.
Caution
To prevent electric shock, do not
use this (polarized) plug with an
extension cord, receptacle or
other outlet, unless the blades
can be fully inserted to prevent
blade exposure.

6 880 Series Audio Distribution Amplifiers Instruction Manual
Chapter 1: 880 Series Mounting Frames
Preliminary—Contents are proprietary and confidential. Do not photocopy or distribute.
Power Supply
882PS
The 882PS power supply is a two-stage switching power supply that provides
the following outputs:
• +21V at 1.0A
• –21V at 1.0A
Initial design criteria focused on maximizing efficiency and minimizing
individual component temperature rise. This has been achieved with a two stage
design consisting of an input “Buck” converter feeding a high efficiency
push-pull output stage. Overall efficiency exceeds 80% and individual
component temperature rise is minimized by operating both converts at high
voltage and low current as well as using Schottky rectifier diodes on the output
stage.
The power supply is designed to work over the two standard input voltage
ranges. With jumper J1 installed the power supply operates over an input range
of 85-135VAC and with jumper J1 removed the operating range is
170-270VAC. Output voltage is adjustable by ±10%. Other output voltages can
be achieved by changing power transformer TR1 without any additional circuit
changes.
884PS
The model 884PS power supply is a two-stage switching power supply that
provides that provides the following outputs:
• +21V at 1.0A
• –21V at 1.0A
Initial design criteria focused on maximizing efficiency and minimizing
individual component temperature rise. This has been achieved with a two stage
design consisting of an input “Buck” converter feeding a high efficiency
push-pull output stage. Overall efficiency exceeds 80% and individual
component temperature rise is minimized by operating both converts at high
voltage and low current as well as using Schottky rectifier diodes on the output
stage.
The power supply is designed to work over the two standard input voltage
ranges. With input selector switch S2 in the 110 position, the power supply
operates over and input range of 85 – 135VAC and with the switch in the 220
position the operating range is 170 – 270VAC. Output voltage is adjustable by
±10%. Other output voltages can be achieved by changing power transformer
TR1 without any additional circuit changes.