Comtech EF Data CRS-180 - Manual (Page 34)

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 50Ω 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