Comtech EF Data CRS-170A - Manual (Page 39)

CRS-170A L-Band 1:1 Redundancy Switch MN/CRS170A.IOM
Introduction Revision 13
1–19
1.4 Summary of Specifications
Equipment Type L-Band 1:1 Redundancy Switch
Manufacturer Comtech EF Data, Tempe, Arizona
Supported Comtech EF Data Modems • CDM-625A Advanced Satellite Modem with/without optional IP
Packet Processor
• CDM-625 Advanced Satellite Modem with/without optional IP Packet
Processor
• CDM-850 Remote Router
• CDM-840 Remote Router
• CDM-760 Advanced High-Speed Trunking Modem
• CDM-750 Advanced High-Speed Trunking Modem
• CDM-570AL L-Band Satellite Modem with/without optional IP Packet
Processor
• CDM-570L L-Band Satellite Modem with/without optional IP Module
• CDM-710GL L-Band High-Speed Satellite Modem
• CDM-710 L-Band Broadcast Satellite Modem
• CDM-700 L-Band Satellite Modem
• CDM-600L (CLM-9600L) with CRS-150 1:1 Data Switch
• SDM-300L3 with SMS-301 1:1 Data Switch
Operating Modes • Fully automatic under control of supporting 1:1 switch.
• Manual under control of supporting 1:1 switch.
Architecture • Full bridging architecture when supported by CRS-150, or SMS-301
data switching and control, with configuration synchronization.
• Tx redundancy supports all BUC interface signals (RF, 10 MHz
reference, FSK communications, and power supply)
• Rx IF signal fed to both Online and Backup units. Rx switching
supports all LNB interface signals (RF, 10 MHz reference, and power
supply.)
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 (7 dB max loss)
BUC Power Switching Switched by power relay (60VDC max, 4A max)
BUC 10 MHz Reference Switching Switched by relay (1 dB max loss, 70dB min ON/OFF isolation)
BUC FSK Comms Switching Switched by relay (70dB min ON/OFF isolation)
LNB Power Switching Switched by power relay (28 VDC max)
LNB 10 MHz Reference Switching Switched by relay (1 dB max loss)
Tx-Rx Isolation 90dB min, 950-2250 MHz
IF Impedance Optimized for 50Ω (> 10 dB return loss on external IF ports)
IF Connectors 50Ω Type N Female