Ross ACO-4500 User manual

ACO-4500 User Guide

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ACO-4500 · User Guide
• Ross Part Number: 4500DR-204-03
• Release Date: April 6, 2020.
The information contained in this Guide is subject to change without notice or obligation.
Copyright
©2020 Ross Video Limited, Ross®, and any related marks are trademarks or registered trademarks of Ross Video
Limited. All other trademarks are the property of their respective companies. PATENTS ISSUED and PENDING.
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any
form or by any means, mechanical, photocopying, recording or otherwise, without the prior written permission of
Ross Video. While every precaution has been taken in the preparation of this document, Ross Video assumes no
responsibility for errors or omissions. Neither is any liability assumed for damages resulting from the use of the
information contained herein.
Patents
Patent numbers US 7,034,886; US 7,508,455; US 7,602,446; US 7,802,802 B2; US 7,834,886; US 7,914,332; US
8,307,284; US 8,407,374 B2; US 8,499,019 B2; US 8,519,949 B2; US 8,743,292 B2; GB 2,419,119 B; GB
2,447,380 B; and other patents pending.
Notice
The material in this manual is furnished for informational use only. It is subject to change without notice and should
not be construed as commitment by Ross Video Limited. Ross Video Limited assumes no responsibility or liability
for errors or inaccuracies that may appear in this manual.
Safety Notices
Refer to the “Important Regulatory and Safety Notices” document that accompanied your product.
EMC Notices
United States of America FCC Part 15
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 their own expense.
Canada
This Class “A” digital apparatus complies with Canadian ICES-003.
Cet appariel numerique de la classe “A” est conforme a la norme NMB-003 du Canada.
Europe
Notice — Changes or modifications to this equipment not expressly approved by Ross Video Limited
could void the user’s authority to operate this equipment.

This equipment is in compliance with the essential requirements and other relevant provisions of CE Directive
93/68/EEC.
International
This equipment has been tested to CISPR 22:2009 and found to comply with the limits for a Class A Digital device.
Maintenance/User Serviceable Parts
Routine maintenance to this Ross Video product is not required. This product contains no user serviceable parts. If
the module does not appear to be working properly, please contact Technical Support using the numbers listed
under the “Contact Us” section on the last page of this manual. This product is covered by a generous ‘-year
warranty. See the “Warranty and Repair Policy” section in this manual for details.
Environmental Information
The equipment that you purchased required the extraction and use of natural resources for its production. It
may contain hazardous substances that could impact health and the environment.
To avoid the potential release of those substances into the environment and to diminish the need for the extraction
of natural resources, Ross Video encourages you to use the appropriate take-back systems. These systems will reuse
or recycle most of the materials from your end-of-life equipment in an environmentally friendly and health
conscious manner.
The crossed out wheelie bin symbol invites you to use these systems.
If you need more information on the collection, re-use, and recycling systems, please contact your local or regional
waste administration. You can also contact Ross Video for more information on the environmental performance of
our products.
Notice — This is a Class A product. In domestic environments, this product may cause radio
interference, in which case the user may have to take adequate measures.

Company Address
Ross Video Limited Ross Video Incorporated
8 John Street P.O. Box 880
Iroquois, Ontario, K0E 1K0 Ogdensburg, New York
Canada USA 13669-0880
General Business Office: (+1) 613 • 652 • 4886
Fax: (+1) 613 • 652 • 4425
Technical Support: (+1) 613 • 652 • 4886
After Hours Emergency: (+1) 613 • 349 • 0006
E-mail (Technical Support): [email protected]
E-mail (General Information): [e-mail]
Website: http://www.rossvideo.com

ACO-4500 User Guide (v3.0) Contents • i
Contents
Introduction 11
Related Publications ...............................................................................................................................................11
Documentation Conventions ..................................................................................................................................11
Interface Elements ...............................................................................................................................................11
User Entered Text ...............................................................................................................................................11
Referenced Guides ..............................................................................................................................................11
Menu Sequences ..................................................................................................................................................12
Important Instructions .........................................................................................................................................12
Contacting Technical Support ................................................................................................................................12
Before You Begin 13
Features ..................................................................................................................................................................14
Functional Block Diagram ..................................................................................................................................... 14
Hardware Overview 15
Front Panel Overview ............................................................................................................................................15
Rear Panel Overview .............................................................................................................................................15
Physical Installation 17
Before You Begin ..................................................................................................................................................17
Static Discharge ..................................................................................................................................................17
Operating Environment Requirements ................................................................................................................17
Unpacking ...........................................................................................................................................................17
Accessories and Options ........................................................................................................................................18
Standard Accessories ..........................................................................................................................................18
Rack Mount Installation .........................................................................................................................................18
Installing the ACO-4500 into a Rack Unit ..........................................................................................................18
Installing the Rear Support Brackets .................................................................................................................. 18
Connecting an SRG-4500 to an ACO-4500 ...........................................................................................................19
Connecting the Primary SRG-4500 to the ACO-4500 ........................................................................................19
Connecting the Backup SRG-4500 to the ACO-4500 ........................................................................................20
Installing the Breakout PCB ..................................................................................................................................20
Before You Begin ...............................................................................................................................................21
Installing the Breakout PCB on the Rack Tray ...................................................................................................21
Installing the Breakout PCB into the Rack Frame ..............................................................................................22
Cabling the Breakout PCB to the ACO-4500 .....................................................................................................23
Cabling the Connectors on the Breakout PCB ....................................................................................................23
Connecting Power to the ACO-4500 .....................................................................................................................24
AC Power Requirement ......................................................................................................................................24
Connecting the Power Cable ...............................................................................................................................24
Functional Check Procedures 25
Required Equipment ..............................................................................................................................................25
Before You Begin ..................................................................................................................................................25
Initial Power-Up .....................................................................................................................................................25
Initial Configuration ...............................................................................................................................................27
Performing Functional Checks ..............................................................................................................................27
Normal Operation (No Faults) ............................................................................................................................28
Loss of the Primary Signal ..................................................................................................................................28
Loss of Power ......................................................................................................................................................28
Operational Configuration .....................................................................................................................................29

ii • Contents ACO-4500 User Guide (v3.0)
Power ...................................................................................................................................................................29
Signals .................................................................................................................................................................29
Getting Started 31
General Usage ........................................................................................................................................................31
Launching DashBoard ............................................................................................................................................31
Enabling a Connection in DashBoard ....................................................................................................................31
Accessing the ACO-4500 Interfaces in DashBoard ...............................................................................................32
Operating Basics ....................................................................................................................................................32
Operating Mode ...................................................................................................................................................33
Fault Reporting ....................................................................................................................................................33
Front Panel Menu System 35
Navigating the Panel Menu System .......................................................................................................................35
Menu Trees ..........................................................................................................................................................35
Main Menu .............................................................................................................................................................36
Operational Modes ..............................................................................................................................................36
Output ..................................................................................................................................................................37
Other Menus ........................................................................................................................................................37
Signal Strength Menu .............................................................................................................................................37
Channel # = POK X BOK X ...............................................................................................................................38
Channel Configuration Menu .................................................................................................................................38
Installation Scenarios ..........................................................................................................................................39
Channel # Type ...................................................................................................................................................39
System Setup Menus ..............................................................................................................................................39
Temperature Reports ...........................................................................................................................................40
Event Report ........................................................................................................................................................40
System Report .....................................................................................................................................................42
Configuration Menu ...............................................................................................................................................43
Network Menu ........................................................................................................................................................44
DashBoard Menu ....................................................................................................................................................45
Calibration Menu ....................................................................................................................................................47
Changeover Channel ...........................................................................................................................................47
Do Calibration? ..................................................................................................................................................47
P NSig, B NSig ....................................................................................................................................................48
Troubleshooting 49
Troubleshooting Checklists ....................................................................................................................................49
Replacing a Power Supply .....................................................................................................................................49
Moving the Handle on the PS-4500 ....................................................................................................................50
Removing the Front Faceplate ............................................................................................................................50
Removing the Failed PS-4500 .............................................................................................................................51
Installing the New PS-4500 .................................................................................................................................51
Re-install the Front Faceplate ..............................................................................................................................51
Software Upgrades .................................................................................................................................................51
Before You Begin ................................................................................................................................................52
Uploading the Software Files ..............................................................................................................................52
Technical Specifications 55
General Characteristics ..........................................................................................................................................55
Performance Conditions ......................................................................................................................................55
BNC Channels ........................................................................................................................................................55
Balanced (Unmonitored Channels, Relay Changeover) ........................................................................................56
RS-232 Port ............................................................................................................................................................56
Ethernet Interface ...................................................................................................................................................56
AC Power Source ...................................................................................................................................................56

ACO-4500 User Guide (v3.0) Contents • iii
Clearance Requirements ........................................................................................................................................57
Mechanical Characteristics .................................................................................................................................... 57
Environment Characteristics ..................................................................................................................................57
Connector Pinouts 59
Balanced Signal Connectors ..................................................................................................................................59
Pin Views of Connectors .....................................................................................................................................60
RS232 Connector ...................................................................................................................................................60
Breakout Cable ....................................................................................................................................................60
Pin Views of Chassis Connectors ....................................................................................................................... 61
Calibration Procedure 63
Disclaimer ..............................................................................................................................................................63
Calibrating the ACO-4500 .....................................................................................................................................63
Service Information 65
User Maintenance ..................................................................................................................................................65
General Care ........................................................................................................................................................65
Exterior Cleaning ................................................................................................................................................65
Preventive Maintenance ......................................................................................................................................65
Servicing .............................................................................................................................................................65
Service Safety Overview .....................................................................................................................................66
Important Information Regarding the use of Switch Cleaners ............................................................................ 66
Warranty and Repair Policy ...................................................................................................................................66
In Case of Problems ............................................................................................................................................67
Glossary 69

iv • Contents ACO-4500 User Guide (v3.0)

ACO-4500 User Guide (v3.0) Introduction • 11
Introduction
This guide covers the installation, configuration, and use of the ACO-4500 Master Reference and Test Signal
Generator. The following chapters are included:
•“Introduction” summarizes the guide and provides important terms, and conventions.
•“Before You Begin” provides a brief product overview and installation requirements for the ACO-4500.
•“Hardware Overview” describes the ACO-4500 hardware components.
•“Physical Installation” provides instructions for the basic physical installation of the ACO-4500.
•“Getting Started” outlines how to display the ACO-4500 interfaces in DashBoard, and how to
•“Operation” provides general information for operating the ACO-4500.
•“Troubleshooting” provides a basic troubleshooting checklist, steps for replacing a power supply, and a
procedure for upgrading the software on the ACO-4500.
•“Technical Specifications” provides the specifications for the ACO-4500.
•“Connector Pinouts” lists the pinouts of various multi-way connectors on the ACO-4500 rear panel.
•“Calibration Procedure” provides an overview of how to calibrate your ACO-4500.
•“Service Information” provides information on the warranty and repair policy for your ACO-4500.
•“Glossary”provides a list of terms used throughout this guide.
Related Publications
It is recommended to consult the following Ross documentation before installing and configuring your ACO-4500:
•DashBoard User Manual, Ross Part Number: 8351DR-004
•ACO-4500 Quick Start Guide, Ross Part Number: 4500DR-202
•SRG-4500 Quick Start Guide, Ross Part Number: 4500DR-102
•SRG-4500 User Guide, Ross Part Number: 4500DR-104
Documentation Conventions
Special text formats are used in this guide to identify parts of the user interface, text that a user must enter, or a
sequence of menus and sub-menus that must be followed to reach a particular command.
Interface Elements
Bold text is used to identify a user interface element such as a dialog box, menu item, or button. For example:
In the Edit dialog, click Insert Above.
User Entered Text
Courier text is used to identify text that a user must enter. For example:
In the Language box, enter English.
Referenced Guides
Italic text is used to identify the titles of referenced guides, manuals, or documents. For example:
For more information, refer to the DashBoard User Manual.

12 • Introduction ACO-4500 User Guide (v3.0)
Menu Sequences
Menu arrows are used in procedures to identify a sequence of menu items that you must follow. For example, if a
step reads “File > Save As,” you would select the File menu and then select Save As.
The term [Confirm] indicates that you should press the Rotary Control, and [Back] indicates that you should
press the blue push-button.
Important Instructions
Star icons are used to identify important instructions or features. For example:
Contact your IT department before connecting to your facility network to ensure that there are no conflicts. They
will provide you with an appropriate value for the IP Address, Subnet Mask, and Gateway for your ACO-4500.
Contacting Technical Support
At Ross Video, we take pride in the quality of our products, but if problems occur, help is as close as the nearest
telephone.
Our 24-hour Hot Line service ensures you have access to technical expertise around the clock. After-sales service
and technical support is provided directly by Ross Video personnel. During business hours (Eastern Time),
technical support personnel are available by telephone. After hours and on weekends, a direct emergency technical
support phone line is available. If the technical support person who is on call does not answer this line immediately,
a voice message can be left and the call will be returned shortly. This team of highly trained staff is available to
react to any problem and to do whatever is necessary to ensure customer satisfaction.
•Technical Support: ([phone]
•After Hours Emergency: ([phone]
•E-mail: [email protected]
•Website: http://www.rossvideo.com

ACO-4500 User Guide (v3.0) Before You Begin • 13
Before You Begin
The ACO-4500 is designed for high reliability Master Sync operations where two SRG-4500 units are provided as
a fail-safe Primary and Backup pair. The ACO-4500 provides automatic fail over to the wide range of SRG-4500
reference signals.
The ACO-4500 provides user-selection of reference sources. Automatic changeover may occur upon fault detection
in any active source.
The ACO-4500 is an in-line device without internal buffers. Switching for all channels is by mechanical relay. The
ACO-4500 also provides internal termination for unswitched BNC inputs.
The ACO-4500 includes 12 channels in a 1U rack. Each BNC channel consists of a Primary Input, a Backup Input,
and an Output. All BNC channel relays switch in unison upon fault detection in any active BNC channel,
front-panel command, or remote command.
In conjunction with the BNC channels, there are a number of unmonitored secondary channels available on
Molex® connectors. All secondary connector channel relays switch in unison upon fault detection in any active
BNC channel, front-panel command, or remote command.
The ACO-4500 uses signal amplitude as the basis for error checking. You can configure each BNC channel to
check for a different type of input. There is a selection of predefined checking levels relating to the various signals
that are supported:
• No Measurement
• Color Black (no ancillary signals present, i.e. only Sync and Burst)
• Color Black + VITC (with one or some ancillary signals present)
• 600mV Tri Sync
• SD SDI - LOS
• HD SDI - LOS
•3GSDI-LOS
• 1V 10MHz
• 1V Sub-carrier
•1VAES
•2VPulses-LOS
•4VPulses-LOS
For the common signals, a fault is reported when the input signal level falls below a predetermined ratio of the
nominal peak value. Visual fault indications appear on the front-panel display for signals from both the Primary and
Backup SRG-4500s. These indications remain on until cleared by the operator.
For other signals, a simple “Loss Of Signal” (LOS) detection is performed.
The signal reference amplitudes used for fault detection are programmed during factory calibration. The ACO-4500
includes dual power supplies, which provide power supply failure redundancy.

14 • Before You Begin ACO-4500 User Guide (v3.0)
Features
The ACO-4500 includes the following:
• 12 channels in 1U rack height
• All BNC channels are signal agnostic
• All BNC channels are measured on both Primary and Backup inputs
• Ethernet (100-BaseT) interface remote control
•Nofans
• All Configuration settings performed through DashBoard
• Tight integration with SRG-4500
Functional Block Diagram
This section provides the functional block diagram that outlines the workflow of the ACO-4500.
Figure 2.1 ACO-4500 — Functional Diagram
*Including unmonitored multi-way channels
BACKUP
PEAK
DETECT
PRIMARY
PEAK
DETECT
PRIMARY
LEVEL
CHECK
BACKUP
LEVEL
CHECK
Output
Primary Input
Secondary Input
RELAY
OTHER CHANNELS
OTHER CHANNELS
OTHER CHANNELS
LOGIC
DECODE
Other Channel Relays*
Operating Status/
Fault Indications
Auto / Manual
Primary / Backup
LCD
DISPLAY
REFERENCE
GENERATORS

ACO-4500 User Guide (v3.0) Hardware Overview • 15
Hardware Overview
This chapter presents information on the ACO-4500 front and rear panels.
Front Panel Overview
This section summarizes the controls and indicators located on the ACO-4500 front panel.
Figure 3.1 ACO-4500 — Front Panel Components
1. LCD Display
The dot-matrix LCD display is used to show system status, fault indications, and general in-use information, as
well as being used to configure the menu system items.
2. Back Button
The Back push-button is used to exit the current menu screen, and to traverse back through the menus, ultimately
to the stand-by screen.
Pressing the dedicated push-button once will exit the current menu level. When you have finished editing the
menu options, you should use the dedicated push-button to exit the menu system completely. You need to press
the button a suitable number of times to get back to the stand-by screen (the one with the Ross Video logo, one
press back from the top level menu). This will save any changes that you have made to the non-volatile memory.
3. Rotary/Push Control Knob
The Rotary / Push control has two functions:
› the rotary function is used to navigate up or down items in a menu, or to cycle through a range of values
relating to a menu item,
› the push function is used to confirm a menu item selection for editing, to exit menu item editing, or take you
“forward” to the next menu item.
Selecting or editing menu items requires you to turn the Rotary Control in order to select or change the
highlighted menu item / setting, then to press the Rotary Control to select or confirm that menu item / setting.
Pressing the Rotary Control will select the highlighted menu item for editing, exit menu item editing, or take you
to the next menu level. Note that there may be more menu lines available than can be displayed on the LCD
screen; be sure to scroll down (or up) to find the required entry.
4. Removable Power Supplies (not shown)
There are two Removable Power Supply assemblies, installed and secured into the front of the ACO-4500, either
side of the LCD display. These supplies can be removed or inserted while mains power is still present. Should it
become necessary to replace one or both of the Removable Power Supply assemblies, the instrument does not
have to be removed from the rack.
Rear Panel Overview
This section outlines the ACO-4500 rear panel connectors.
2
31
ACO-4500 CHANGEOVER

16 • Hardware Overview ACO-4500 User Guide (v3.0)
Figure 3.2 ACO-4500 — Rear Panel Components
1. Power Connectors
The ACO-4500 is designed to operate from a single-phase power source with the neutral conductor at or near
earth ground. The line conductor is fused for over-current protection. A protective ground connection through the
grounding conductor in the power cord is essential for safe operation. Safety earth studs are also provided for
earth bonding the chassis if you so require.
The ACO-4500 operates from an AC line frequency of 48Hz to 63Hz, over the range of 85VAC to 250VAC,
without the need for user configuration. Refer to the chapter “Technical Specifications” on page 55 for
additional information on power and environment requirements.
You need to provide two power connections, one for each power supply. For full power security, these should be
on separate, independent and secure power grids. However, you still gain the security of power supply failure
redundancy if you use the same power grid for both connections.
2. BALANCED Connectors
Three 30-pin Molex® connectors are present. These are unmonitored relay changeover channels that follow the
BNC channels. Typical signals to connect here are those not supported via the BNC channels, such as Balanced
Audio, Balanced Timecode, etc. The Molex® connectors are use for the following:
› Top connector — input for the backup SRG-4500.
› Middle connector — output of the ACO-4500.
› Bottom connector — input for the primary SRG-4500.
3. BACKUP - # - PRIMARY BNCs
Each triplet of BNCs relates to one changeover channel, comprising of a Primary input, a Backup input, and an
output.
›BACKUP — An input from the Backup SRG-4500 is connected here. The signal applied must be the same
format as the Primary.
›#— The switched output from either the Primary input or the Backup input appears on the center BNC of
each triplet. Which input appears here, and when, is determined by the configuration of the unit.
›PRIMARY — An input from the Primary SRG-4500 is connected here. The signal can be any one of the
supported types. The signal applied must be the same format as the Backup. If the channel is configured for
“No Measurement”, almost any signal may be connected (the user must take into account, and be aware of, the
limitations of the switching relay regarding voltage, current and signal bandwidth).
4. GPI / RS232
This rear-panel connector is a 10-pin male dual-in-line type. This allows for RS-232 communication, and GPI/O
functionality. This port is not implemented.
5. 100-Base T
This rear-panel connector is a standard RJ45 Ethernet connector. This is used for DashBoard communication.
After installation, it may be used to upload software updates.
Warning — To avoid the risk of electrical shock, do not operate the unit when the top cover
is removed. Dangerous high voltages are present within the unit.
GPI/RS232
100-BaseT
— 7 —BACKUP PRIMARY BACKUP
BACKUP — 2 —
— 8 — PRIMARY BACKUP — 9 — PRIMARY BACKUP — 10 — PRIMARY BACKUP — 11 — PRIMARY BACKUP — 12 — PRIMARY
BACKUP — 1 — PRIMARY PRIMARY BACKUP BACKUP BACKUP BACKUP— 3 — — 4 — — 5 — — 6 —PRIMARY PRIMARY PRIMARY PRIMARY
BALANCED
BALANCED
52 3
4
1 1

ACO-4500 User Guide (v3.0) Physical Installation • 17
Physical Installation
If you have questions pertaining to the installation of ACO-4500, please contact us at the numbers listed in the
section “Contacting Technical Support”. Our technical staff is always available for consultation, training, or
service.
For More Information on...
• the technical specifications for the ACO-4500, refer to the chapter “Technical Specifications” on page 55.
Before You Begin
Before installing the ACO-4500, refer to the document “Important Regulatory and Safety Notices to Service
Personnel” that accompanied your unit for general safety information.
Static Discharge
Throughout this chapter, please heed the following cautionary note:
Operating Environment Requirements
Keep the following in mind before installing the ACO-4500:
• Verify that the location of your installation has the proper operating environment. The ACO-4500 operates
correctly in ambient temperatures from 0°C to +40°C and relative humidity from 20% to 80%.
• The ACO-4500 requires 2”(50mm) of side clearance for counter top use. Also, ensure sufficient rear clearance,
e.g. 3”(75mm), so that cables are not compromised.
• The ACO-4500 does not currently have an internal fan to assist with ventilation or cooling. Therefore, when you
install the unit in an equipment bay, it is imperative that you ensure there is sufficient space all around the unit to
allow the airflow to vent away any excess heat generated by the unit.
For More Information on...
• environmental operating specifications, refer to the chapter “Technical Specifications” on page 55.
Unpacking
Unpack each ACO-4500 you received from the shipping container and ensure that all items are included. Initial
Product Inspection
Perform the following when you receive your ACO-4500:
1. Inspect the shipping carton for external damage, which may indicate possible damage to the ACO-4500. If
damage exists, document it, including photographs, to support any insurance claim.
2. Remove the instrument from the shipping carton.
3. Check that the ACO-4500 has not been damaged in transit. The exterior should not have any scratches or
impact marks. Prior to shipment, the ACO-4500 is thoroughly inspected for mechanical defects.
4. Verify that the shipping carton contains the instrument, the standard accessories, and any optional accessories
that you ordered.
ESD Susceptibility — Static discharge can cause serious damage to sensitive
semiconductor devices. Avoid handling circuit boards in high static environments such as
carpeted areas and when synthetic fiber clothing is worn. Always exercise proper grounding
precautions when working on circuit boards and related equipment.
Caution — The ACO-4500 could be damaged if it is powered on at temperatures or
humidities outside the specified ranges.

18 • Physical Installation ACO-4500 User Guide (v3.0)
If any items are missing or damaged, contact your sales representative or Ross Video directly.
5. Save the shipping carton and packaging materials for ACO-4500 re-packaging in case return shipment
becomes necessary.
6. Perform the Functional Check Procedures as outlined in the chapter “Functional Check Procedures” on
page 25 after installing the ACO-4500.
Accessories and Options
This section lists the standard accessories that ship with the ACO-4500 and the available software options that you
can purchase.
Standard Accessories
The following accessories are shipped with the ACO-4500.
User Documentation Disc
A Documentation Resources disc was included with your ACO-4500.
Power Cords
All ACO-4500 are shipped with one of the following power cord options:
• Power cords for use in the United Kingdom are BS1363 approved.
• Power cords for use in North America are UL listed and CSA certified.
• Power cords for use in Europe conform to CEE7, DIN49441 and VDE standards.
• Cords for use in other areas are approved by at least one authority acceptable in the country to which the product
is shipped.
Rack Mount Installation
You can install the ACO-4500 into an equipment rack. It is recommended to use the rack mount kit and to loom the
cables so that they do not introduce extra weight or twisting force on the front panel rack mountings or rear panel
connectors. If installed in a mobile application, the rack mount kit is essential.
This section describes how to install the ACO-4500 into the rack.
Installing the ACO-4500 into a Rack Unit
The ACO-4500 mounts in the rack cabinet by means of four screws through the front mounting flanges. This should
normally be sufficient to carry the load, including weight of cables. Refer to the ACO-4500 Quick Start Guide for
mounting details.
Installing the Rear Support Brackets
In some cases, (mobile trucks, etc.) it may be desirable to also support the rear of the ACO-4500. The rear support
bars can be attached to the ACO-4500 in six possible positions. (Figure 4.1)
Warning — To prevent the rack mounted ACO-4500 from tipping forward onto the operator,
install the instrument so that the operator will be able to access all of its rear-panel connectors
without pushing down on the instrument.
Warning — Do not use the support brackets to carry the ACO-4500. The brackets are not
primarily designed for this purpose, and property damage or personal injury may result.

ACO-4500 User Guide (v3.0) Physical Installation • 19
Figure 4.1 Installing the Support Brackets
To install the support brackets
1. Choose the position that suits the cabinet depth and will give approximately a 0.5” projection beyond the
previously mounted bracket.
2. Using four screws per bracket, as shown in Figure 4.1, attach both bars.
3. Mount the frame to the front rails of the rack cabinet using rack screws.
4. At the rear of the cabinet, slide the bracket slots over the rear of the support bars and secure to the cabinet rear
rails with rack screws.
Connecting an SRG-4500 to an ACO-4500
Each SRG-4500 (Primary and Backup) can connect directly to the ACO-4500 rear panel via an Interface Cable
(4400CR-100-01). The Breakout PCB Kit that came with your SRG-4500 will be mounted and installed in the
section
Connecting the Primary SRG-4500 to the ACO-4500
The Primary SRG-4500 connects directly to the ACO-4500 via its BALANCED connector and the Interface Cable
(4400CR-100-01). This cable has red and violet wires, and two 30-pin Connectors.
To connect the Primary SRG-4500 to the ACO-4500
1. Connect one end of the Interface Cable (4400CR-100-01) to the BALANCED connector on the primary
SRG-4500 rear panel.
2. Connect the other end of the same Interface Cable to the bottom 30-pin Connector on the ACO-4500 rear
panel. Refer to Figure 4.2.
One Rack-Unit (1RU)
Mounting Frame
Side View
Rack Cabinet
Rear View
Cabinet
Front Vertical
Mounting Rail
Cabinet
Rear Vertical
Mounting Rail
Cabinet
Left Rear Vertical
Mounting Rail
Cabinet
Right Rear Vertical
Mounting Rail
0.500”
Rear Support Bar
Bracket
Allow approximately 0.500” of the end of the
Rear Support Bar to project beyond the Bracket
Select a mounting position
that allows Rear Support Bars
to slide into slots of Brackets

20 • Physical Installation ACO-4500 User Guide (v3.0)
Figure 4.2 Connecting the Primary SRG-4500 to the ACO-4500 Rear Panel
Connecting the Backup SRG-4500 to the ACO-4500
The Backup SRG-4500 connects directly to the ACO-4500 via its BALANCED connector and a second Interface
Cable (4400CR-100-01). This cable has red and violet wires, and two 30-pin Connectors.
To connect the Backup SRG-4500 to the ACO-4500
1. Connect one end of the Interface Cable (4400CR-100-01) to the BALANCED connector on the Backup
SRG-4500 rear panel.
2. Connect the other end of the same Interface Cable to the top 30-pin Connector on the ACO-4500 rear panel.
Refer to Figure 4.3.
Figure 4.3 Connecting the Backup SRG-4500 to the ACO-4500 Rear Panel
3. Proceed to install the Breakout PCB as outlined in the next section.
Installing the Breakout PCB
This section provides instructions for installing the Breakout PCB with the ACO-4500, and within a redundant
system of dual SRG-4500 units.
Installing the Breakout PCB requires:
ACO-4500
GPI/RS232
100-BaseT
— 7 —BACKUP PRIMARY BACKUP
BACKUP — 2 —
— 8 — PRIMARY BACKUP — 9 — PRIMARY BACKUP — 10 — PRIMARY BACKUP — 11 — PRIMARY BACKUP — 12 — PRIMARY
BACKUP — 1 — PRIMARY PRIMARY BACKUP BACKUP BACKUP BACKUP— 3 — — 4 — — 5 — — 6 —PRIMARY PRIMARY PRIMARY PRIMARY
Primary SRG-4500
GbE / PTP
100-BaseT
GPS 1Hz 10MHz IN 10MHz WK/TTL1 WK/TTL2 6Hz/TTL3 DARS AES 1 AES 2BALANCED AUDIO/AES/LTC
COMPOSITE BLACK 1REF LOOP TRI/BLACK 2 TRI/BLACK 3 TRI/BLACK 4 SDI 2 BLACKSDI 1 SDI 1 BLACK SDI 2
SDI 4 BLACKSDI 3 SDI 3 BLACK SDI 4
Backup SRG-4500
GbE / PTP
100-BaseT
GPS 1Hz 10MHz IN 10MHz WK/TTL1 WK/TTL2 6Hz/TTL3 DARS AES 1 AES 2BALANCED AUDIO/AES/LTC
COMPOSITE BLACK 1REF LOOP TRI/BLACK 2 TRI/BLACK 3 TRI/BLACK 4 SDI 2 BLACKSDI 1 SDI 1 BLACK SDI 2
SDI 4 BLACKSDI 3 SDI 3 BLACK SDI 4
4500CR-100-01
4500CR-100-01
ACO-4500
GPI/RS232
100-BaseT
— 7 —BACKUP PRIMARY BACKUP
BACKUP — 2 —
— 8 — PRIMARY BACKUP — 9 — PRIMARY BACKUP — 10 — PRIMARY BACKUP — 11 — PRIMARY BACKUP — 12 — PRIMARY
BACKUP — 1 — PRIMARY PRIMARY BACKUP BACKUP BACKUP BACKUP— 3 — — 4 — — 5 — — 6 —PRIMARY PRIMARY PRIMARY PRIMARY
Primary SRG-4500
GbE / PTP
100-BaseT
GPS 1Hz 10MHz IN 10MHz WK/TTL1 WK/TTL2 6Hz/TTL3 DARS AES 1 AES 2BALANCED AUDIO/AES/LTC
COMPOSITE BLACK 1REF LOOP TRI/BLACK 2 TRI/BLACK 3 TRI/BLACK 4 SDI 2 BLACKSDI 1 SDI 1 BLACK SDI 2
SDI 4 BLACKSDI 3 SDI 3 BLACK SDI 4
Backup SRG-4500
GbE / PTP
100-BaseT
GPS 1Hz 10MHz IN 10MHz WK/TTL1 WK/TTL2 6Hz/TTL3 DARS AES 1 AES 2BALANCED AUDIO/AES/LTC
COMPOSITE BLACK 1REF LOOP TRI/BLACK 2 TRI/BLACK 3 TRI/BLACK 4 SDI 2 BLACKSDI 1 SDI 1 BLACK SDI 2
SDI 4 BLACKSDI 3 SDI 3 BLACK SDI 4
4500CR-100-01
4500CR-100-01
4500CR-100-01
4500CR-100-01