Product specifications

CRS-180 70/140 MHz IF 1:1 Redundancy Switch MN/CRS180.IOM
Introduction Revision 11
1–14
1.4 Summary of Specifications
Equipment Type
IF 1:1 Redundancy Switch
Manufacturer
Comtech EF Data, Tempe, Arizona
Comtech EF Data
Modems Supported
• CDM-625A Advanced Satellite Modem
• CDM-625 Advanced Satellite Modem
• CDM-760 Advanced High-Speed Trunking Modem
• CDM-750 Advanced High-Speed Trunking Modem
• CDM-570A 70/140 MHz Satellite Modem (with/without Optional IP Packet
Processor)
• CDM-570 70/140 MHz Satellite Modem (with/without Optional IP Module)
• CDM-710G 70/140 MHz High-Speed Satellite Modem
• CDM-710 70/140 MHz Broadcast Satellite Modem
• CDM-700 70/140 MHz Satellite Modem
Operating Modes
• Fully Automatic under control of supporting 1:1 switch.
• Manual under control of supporting 1:1 switch.
Architecture
• Full bridging architecture with configuration synchronization.
• Tx switching guarantees the Offline modem is muted at least 60 dB down.
•
Rx IF signal fed to both Online and Standby units.
Switch Conditions
Tx/Rx switching follows state of supporting data switching via control input from data
switch.
IF Switching/
Splitting
• Tx IF: Switched by RF relay (1.5 dB max loss, 40 dB min ON/OFF isolation)
• Rx IF: Passive power splitting (4dB max loss)
Tx-Rx Isolation
40 dB min, 50 - 190 MHz
IF Impedance
Optimized for 50Ω (> 10 dB return loss on external IF ports), 75Ω supported with the
use of external RF transformers (included).
IF Connectors
50
Ω
BNC Female
IF Frequency Range
50 to 190 MHz
Weight
1.1lbs (0.5kg)
Dimensions
Excluding connectors: 1.7 H x 5.7 W x 4.1 D inches (43 H x 143 W x 104 D mm)
Optional 19-inch rack mounting kit available (CEFD P/N KT/11708)
Power requirements
1 Watt maximum
+12 volts DC @ 80 mA (max)
(Power supplied by modems)
Approvals
‘CE’ as follows:
• EMC
• Safety