Product specifications

CRS-170A L-Band 1:1 Redundancy Switch Revision 3
Introduction MN/CRS170A.IOM
1.3 Summary of Specifications
Equipment Type
L-Band 1:1 Redundancy Switch
Manufacturer
Comtech EF Data, Tempe, Arizona
Comtech EF Data Modems
Supported
• CDM-625
• CDM-570L
• CDM-570L with optional IP Module
• CDM-700
• CDM-710
• 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 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 (1.5 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 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)
Tx-Rx Isolation
90dB min, 950-1950 MHz
IF Impedance
Optimized for 50Ω (> 10 dB return loss on external IF ports)
IF Connectors
50Ω Type N Female
IF Frequency Range
950-1950 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)
19-inch rack mounting kit available.
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