Comtech EF Data CRS-500 - Manual (Page 45)

CRS-500 1:N Redundancy System Revision 2
Introduction MN-CRS500
1–19
1.4.1.1 Control Switch Unit (CSU) Configurations
Modem Terrestrial Interface Mode of Operation Modem to CSU Comms Module
CDM-625
EIA-422/530, V.35, Sync EIA-232 Any CRS-512
IP Packet Processor Layer 3 or Bridge N/A (through TMI)
CDM-750
G.703 (T3, E3, STS-1) Any CRS-512
GigE Copper Any N/A (through TMI)
1.4.1.2 Data Switch Unit (DSU) Configurations
Modem Terrestrial Interface
Mode of
Operation
Redundant
Modem Interface
(RMI)
Traffic
Modem Interface
(TMI)
CDM-625
EIA-422/530, V.35,
Sync EIA-232
Any CRS-510 CRS-316
IP Packet Processor Layer 3 or Bridge CRS-510 CRS-520
CDM-750
G.703 (T3, E3, STS-1) Any CRS-505 CRS-345
GigE Copper Any CRS-505 CRS-516
1.4.1.3 ISU (CRS-282xx) Specifications
Characteristic
Requirement
70/140 MHz
L-Band
Operating Frequency 50 to 180 MHz 950 to 2150 MHz
Connector Type Type ‘BNC’ 50 / 75Ω Type ‘N’ 50Ω
Return Loss 18 dB <12 dB
Rx-Rx Isolation > 60 dB > 60 dB
Tx-Tx Isolation > 60 dB
> 60 dB (950 to 1450 MHz)
> 55 dB (1450 to 1750 MHz)
> 50 dB (1750 to 2150 MHz)
Tx Insertion Loss < 1.5 dB < 4.5 dB
Tx Flatness < 0.5 dB 0.5 dB
Rx Insertion Loss < 5 dB < 8.5 dB
Rx Flatness < 0.5 dB 0.5dB