Comtech EF Data CRS-170 - Manual (Page 31)

CRS-170 1:1 Redundancy Switch Revision 1
Installation and Operations Manual MN/CRS170.IOM
33
Chapter 5. SUMMARY OF
SPECIFICATIONS
Equipment Type L-Band 1:1 Redundancy Switch
Manufacturer Comtech EF Data, Tempe, Arizona
Modems
Supported Comtech EF Data CDM-600L with CRS-150 1:1 Data Switch
Comtech EF Data 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 Standby 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 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 Comm
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, 70dB min ON/OFF isolation)
Tx-Rx Isolation 90dB min, 950-1950 MHz
IF Impedance Optimized for 50Ω (> 10 dB return loss on external IF ports)
IF Connectors 50 Ω Type N Female
IF Frequency
range 950-1950 MHz