Comtech EF Data CRS-180 User manual

P/N MN/CRS180.IOM Revision 0
CRS
-
180
IF 1:1 Redundanc
y
Switch
Accessory Product for use only with Comtech EF Data CDM-570 Modem
(Modem Firmware and Hardware Requirements Apply)

i
CRS-180
IF 1:1 Redundancy Switch
Accessory Product for use only with Comtech EF Data CDM-570 Modem
(Modem Firmware and Hardware Requirements Apply)
Comtech EF Data is an ISO 9001
RegisteredCompany.
P/N MN/CRS180.IOM
Revision 0
June 27, 2005

Preface MN/CRS180.IOM
CRS-180 IF 1:1 Redundancy Switch Revision 0
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CUSTOMER SUPPORT
Contact the Comtech EF Data Customer Support Department for:
 Product support or training
 Information on upgrading or returning a product
 Reporting comments or suggestions concerning manuals
Contact Customer Support using any of the following methods:
Email: [email protected]
Mail: Comtech EF Data
Customer Support Department
2114 West 7th Street
Tempe, Arizona 85281 USA
Internet: www.comtechefdata.com
Phone: [phone]
(Main Comtech EF Data Number)
480. 333.4357 (Customer Support Desk)
Fax: [phone]
To return a Comtech EF Data product (in-warranty and out-of-warranty) for repair or
replacement:
1. Request a Return Material Authorization (RMA) number from the Comtech EF Data
Customer Support Department.
2. Be prepared to supply the Customer Support representative with the model number,
serial number, and a description of the problem.
3. To ensure that the product is not damaged during shipping, pack the product in its
original shipping carton/packaging.
4. Ship the product back to Comtech EF Data. (Shipping charges should be prepaid.)
For more information regarding the warranty policies, see Warranty Policy, p. 9.

Table of Contents
CHAPTER 1. INTRODUCTION................................................................................ 1–1
CHAPTER 2. INSTALLATION................................................................................. 2–3
2.1 Unpacking............................................................................................................................ 2–3
2.2 Mounting.............................................................................................................................. 2–4
2.3 Cabling With CDM-570 ..................................................................................................... 2–5
CHAPTER 3. FUNCTIONAL DESCRIPTION .......................................................... 3–9
CHAPTER 4. CONNECTOR PINOUTS ................................................................. 4–11
4.1 Modem Side Connectors................................................................................................... 4–11
4.1.1 Modem A Control Connector ...................................................................................... 4–12
4.1.2 Modem B Control Connector....................................................................................... 4–13
4.1.3 Modem Side BNC Connectors..................................................................................... 4–14
4.2 Antenna Side Connectors................................................................................................. 4–15
CHAPTER 5. SUMMARY OF SPECIFICATIONS.................................................. 5–17

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Figures
Figure 1. CRS-180 ...................................................................................................................... 1–1
Figure 2. Rack Mounting Kits .................................................................................................... 2–4
Figure 3. CDM-570 and CRS-180 Interconnect......................................................................... 2–6
Figure 4. Modem Side of Module............................................................................................. 4–11
Figure 5. Antenna Side Connectors and Ground Lug............................................................... 4–15
Tables
Figure 1. CRS-180 ...................................................................................................................... 1–1
Figure 2. Rack Mounting Kits .................................................................................................... 2–4
Figure 3. CDM-570 and CRS-180 Interconnect......................................................................... 2–6
Figure 4. Modem Side of Module............................................................................................. 4–11
Figure 5. Antenna Side Connectors and Ground Lug............................................................... 4–15

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ABOUT THIS MANUAL
This manual provides installation and operation information for the Comtech EF Data
CRS-180 70/140 Redundancy Switch. This is a technical document intended for earth
station engineers, technicians, and operators responsible for the operation and
maintenance of the CRS-180 70/140 Redundancy Switch.
RELATED DOCUMENTS
Comtech EF Data CDM-570 Satellite Modem Installation and Operation Manual
CONVENTIONS AND REFERENCES
CAUTIONS AND WARNINGS
IMPORTANT
Indicates information critical for proper equipment function.
WARNING
Indicates a potentially hazardous situation that, if not avoided, could result in
death or serious injury.
METRIC CONVERSION
Metric conversion information is located on the inside back cover of this manual. This
information is provided to assist the operator in cross-referencing non-metric to metric
conversions.
RECOMMENDED STANDARD DESIGNATIONS
Recommended Standard (RS) Designations are equivalent to the Electronic Industries
Association (EIA). Comtech EF Data will reference a RS designator throughout the
manual.
TRADEMARKS
All product names mentioned in this manual may be trademarks or registered trademarks
of their respective companies and are hereby acknowledged.

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REPORTING COMMENTS OR SUGGESTIONS CONCERNING THIS MANUAL
Comments and suggestions regarding the content and design of this manual will be
appreciated. To submit comments, please contact the Comtech EF Data Customer
Support Department.
EMC COMPLIANCE
This is a Class B product. In a domestic environment, it may cause radio interference that
requires the user to take adequate protection measures.
EN55022 COMPLIANCE
This equipment meets the radio disturbance characteristic specifications for information
technology equipment as defined in EN55022.
EN50082-1 COMPLIANCE
This equipment meets the electromagnetic compatibility/generic immunity standard as
defined in EN50082-1.
In order that the CRS-180 continues to comply with these standards, observe the
following instructions:
 Connections to the transmit and receive IF ports (BNC female connectors) should be
made using a good quality coaxial cable; for example, RG58/U (50Ω) or RG59/U
(75Ω).
 All 'D' type connectors attached to the unit must have back-shells that provide
continuous metallic shielding. Cable with a continuous outer shield (either foil or
braid, or both) must be used, and the shield must be bonded to the back-shell.
 The equipment must be operated with its cover on at all times. If it becomes
necessary to remove the cover, the user should ensure that the cover is correctly
re-fitted before normal operation commences.
FEDERAL COMMUNICATIONS COMMISSION (FCC)
This equipment has been tested and found to comply with the limits for a Class B 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.

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This equipment generates, uses, and can radiate radio frequency energy. If not installed
and used in accordance with the instruction manual, it may cause harmful interference to
radio communications. Operation of this equipment in a residential area is likely to cause
harmful interference; in which case, users are required to correct the interference at their
own expense.
Note: To ensure compliance, properly shielded cables for DATA I/O shall be used.
More specifically, these cables shall be shielded from end to end, ensuring a
continuous shield.
SAFETY COMPLIANCE
EN 60950
Applicable testing is routinely performed as a condition of manufacturing on all units to
ensure compliance with safety requirements of EN60950.
The equipment is rated for operation at +12 volts DC. It has a maximum power
consumption of 1.0 Watts, and draws a maximum of 80 mA at +12 volts. The power
supply current is, in all circumstances, supplied by either a single Comtech EF Data
CDM-570 modem, or a pair of these modems.
This equipment meets the Safety of Information Technology Equipment specification as
defined in EN60950.
EQUIPMENT CONNECTION
The CRS-180 is designed for operation ONLY with Comtech EF Data modems. These
modems supply DC operating current (electronically fused and protected) and control
signals for the correct functioning of this unit. Connection to other manufacturer’s
equipment could result in damage to the unit. The CRS-180 is not compatible with other
Comtech EF Data modems.

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ENVIRONMENTAL
The CRS-180 must not be operated in an environment where the unit is exposed to
extremes of temperature outside the ambient range 0 to 500C (32 to 1220F), precipitation,
condensation, or humid atmospheres above 95% RH, altitudes (un-pressurized) greater
than 2000 meters, excessive dust or vibration, flammable gases, corrosive or explosive
atmospheres.
Operation in vehicles or other transportable installations that are equipped to provide a
stable environment is permitted. If such vehicles do not provide a stable environment,
safety of the equipment to EN60950 may not be guaranteed
TELECOMMUNICATIONS TERMINAL EQUIPMENT DIRECTIVE
In accordance with the Telecommunications Terminal Equipment Directive 91/263/EEC,
this equipment should not be directly connected to the Public Telecommunications
Network.
LOW VOLTAGE DIRECTIVE (LVD)
The following information is applicable for the European Low Voltage Directive
(EN60950):
<HAR> Type of power cord required for use in the European Community.
!
CAUTION: Double-pole/Neutral Fusing.
ACHTUNG: Zweipolige bzw. Neutralleiter-Sicherung.
International Symbols:
Symbol Definition Symbol Definition
Alternating Current. Protective Earth.
Fuse. Chassis Ground.
Note: For additional symbols, refer to “Cautions” listed earlier in this preface.

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WARRANTY POLICY
This Comtech EF Data product is warranted against defects in material and workmanship
for a period of two years from the date of shipment. During the warranty period, Comtech
EF Data will, at its option, repair or replace products that prove to be defective.
For equipment under warranty, the customer is responsible for freight to Comtech EF
Data and all related custom, taxes, tariffs, insurance, etc. Comtech EF Data is responsible
for the freight charges only for return of the equipment from the factory to the customer.
Comtech EF Data will return the equipment by the same method (i.e., Air, Express,
Surface) as the equipment was sent to Comtech EF Data.
LIMITATIONS OF WARRANTY
The foregoing warranty shall not apply to defects resulting from improper installation or
maintenance, abuse, unauthorized modification, or operation outside of environmental
specifications for the product, or, for damages that occur due to improper repackaging of
equipment for return to Comtech EF Data.
No other warranty is expressed or implied. Comtech EF Data specifically disclaims the
implied warranties of merchantability and fitness for particular purpose.
EXCLUSIVE REMEDIES
The remedies provided herein are the buyer's sole and exclusive remedies. Comtech EF
Data shall not be liable for any direct, indirect, special, incidental, or consequential
damages, whether based on contract, tort, or any other legal theory.
DISCLAIMER
Comtech EF Data has reviewed this manual thoroughly in order to provide an easy-to-use
guide to the equipment. All statements, technical information, and recommendations in
this manual and in any guides or related documents are believed reliable, but the accuracy
and completeness thereof are not guaranteed or warranted, and they are not intended to
be, nor should they be understood to be, representations or warranties concerning the
products described. Further, Comtech EF Data reserves the right to make changes in the
specifications of the products described in this manual at any time without notice and
without obligation to notify any person of such changes.
If you have any questions regarding the equipment or the information in this manual,
please contact the Comtech EF Data Customer Support Department.

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Notes:

1–1
Chapter 1. INTRODUCTION
The CRS-180 IF 1:1 Switch Module is an IF Tx-Rx signal switch designed for use with
IF satellite modems in a 1:1 configuration. The Tx side switches the online unit onto the
transmit coaxial cable. The Rx side of the switch uses power dividers to provide both
demodulators with the same IF signal from the LNB, thus reducing switching time.
The CRS-180 is designed to support 1:1 redundancy for Comtech EF Data CDM-570
modems. Table 1 summarizes the applications including requirements for supporting data
switching hardware and software.
Figure 1. CRS-180

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Table 1. CRS-180 Application Summary
Modem 1:1 IF Switch 1:1 Data Switch Other Information
CDM-570 CRS-180 Built into the CDM-570 Order Data Interface Y-Cable
IMPORTANT
For correct operation of the CRS-180, the CDM-570 modems must have
installed:
Firmware Version 1.1.4 (or higher)
Hardware Revision 3
If the modem does not meet this requirement, please contact the
factory. Flash firmware upgrades are free, and may be downloaded from
the CEFD web page. Hardware revision upgrades must be performed at
the factory.

2–3
Chapter 2. INSTALLATION
IMPORTANT
For correct operation of the CRS-180, the CDM-570 modems must have
installed:
Firmware Version 1.1.4 (or higher)
Hardware Revision 3
If the modem does not meet this requirement, please contact the
factory. Flash firmware upgrades are free, and may be downloaded from
the CEFD web page. Hardware revision upgrades must be performed at
the factory.
2.1 UNPACKING
Inspect shipping containers for damage. If shipping containers are damaged, they should
be kept until the contents of the shipment have been carefully inspected and checked for
normal operation.
Remove the packing list from the outside of the shipping carton. Open the carton and
remove the contents, checking the contents against the packing list. Verify completeness
of the shipment and that the unit functions correctly. If damaged is evident, contact the
carrier and Comtech EF Data immediately and submit a damage report. Be sure to keep
all shipping materials for the carrier’s inspection.
If the unit needs to be returned to Comtech EF Data, use the original shipping container.

INSTALLATION MN/CRS180.IOM
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2.2 MOUNTING
The CRS-180 is designed to be mounted in the rear of a rack containing the modems.
Because of the module’s small size and weight, one installation option is to let the
module hang freely supported by the interfacing cables. Alternatively, a rack mounting
kit (KT/11708) is available that allows the module to be mounted to the rack at the rear
horizontally or vertically as shown in Figure 2.
Figure 2. Rack Mounting Kits

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2.3 CABLING WITH CDM-570
Notes:
1. KT/10553-1 is a G.703 Balanced 1:1 Y-Splitter and G.703 Unbalanced 1:1 Y-Splitter
are not shown. This kit also is part of KT/11569-1/
2. KT/11569 is a kit containing the CRS-180, cables an transformers indicated in the
Figure 3.
Figure 3 shows how to connect a pair of CDM-570 modems together with the CRS-180
via KT/11569. The data cable Y-adapter required for the installation depends on the users
data interface, and must be specified at the time of order.

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MODEM A
MODEM B
1
1
1
1
2
2
3
3
4
Item
No.
Quantity Part # Description
1 4 Pl/0946-1 IF Coax Cable, 50Ω, length = 4 feet
2 2 CA/WR9378-4 Control Cable, Universal, DB9 Male to Male,
length = 4 feet
3 2 XF/BNC-50-75
50/70 ΩTransformer
4 1 CA/RB10461-1 Data Cable, 25 Pin D Sub, 1:1 Y Splitter
-5 1 CA/WR10522-1 G.703 Balanced 1:1 Y Splitter
-6 1 KT/10553-1 G.703 Unbalanced 1:1 Y Splitter
- Item Not Shown.
Figure 3. CDM-570 and CRS-180 Interconnect

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It is essential to ensure that the control and IF connections, both Rx and Tx, are made
correctly.
For example:
The Tx IF from Unit ‘A’ connects to the Tx IF port ‘A’ on the CRS-180 and Unit ‘B’
to “B’, and the same for the Rx IF connections. Failure to observe this requirement
will result in system malfunction.
IMPORTANT
When connecting the Control cable between the CRS-180 and the modems,
ensure that screw locks on the ‘D’ type connectors are securely fastened.
This will prevent the accidental un-mating of the cable, particularly when a
standby unit is being removed or replaced.

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Notes: