Comtech EF Data CRS-180 - Manual (Page 85)

CRS-180 70/140 MHz IF 1:1 Redundancy Switch MN/CRS180.IOM
Cables and Connections Revision 11
5–25
5.4 Cabling to the CDM-570 or CDM-570A
1) For information on the CDM-570/A’s 1:1 auto-enable functionality, see:
• Chapter 4. MODEM
AND SWITCH CONFIGURATION
• CDM-570/CDM-570L/CDMR-570L Satellite Modem Installation and
Operation Manual (CEFD P/N MN/CDM570L.IOM)
• CDM-570A/CDM-570AL/CDMR-570AL Satellite Modem Installation and
Operation Manual (CEFD P/N MN-CDM570A)
2) For information on the cables and cable assemblies specified in this section, see
Appendix A. CABLE DRAWINGS
5.4.1 CRS-180CDM-570/A Control and IF Interface Connections Using
Cabling Kit KT/11599
You must use the Comtech EF Data KT/11599 1:1 Redundancy Control/IF Interface Cabling Kit
for all possible CDM-570/A NON-IP data interface configurations:
KT/11559 1:1 Redundancy Control/IF Interface Cabling Kit (CRS-180

CDM-570/A)
CEFD P/N
Qty/Kit
(REF) Description
Used For
Ch. 5
Fig
PL/11560-1 1 CRS-180 Switch – Top Assembly 1:1 Redundancy
5-36
5-37
PL/0946-1 4 IF (Tx/Rx) Coax Cable, 50Ω Type ‘BNC’, 4’
ModemSwitch IF
Interface
5-37
CA/WR9378-4* 2 Control Cable – Universal, DB-9MDB-9M, 4’
ModemSwitch
Control
5-36
XF/BNC-MF-50-75 2 Transformer, 50-75Ω, 2-200 MHz, BNC, M/F
User IF Tx/Rx
Interface
5-37
CA/RB10461-1 1 Cable – 1:1 Y-Splitter, (2X) DB-25MDB-25F
EIA-422/232
Interface
5-39
CA/WR10522-1 1 Cable – 1:1 Y-Splitter, (2X) DB-15MDB-15F G.703 Balanced 5-40
KT/10553-1 1
G.703 Unbalanced Interface Kit containing:
(Qty 4) CA/BNC75OHM Cable – IF BNC, 1’
(Qty 2) CN/BNC-Tee-JPJ T-Adapter, 50Ω BNC
G.703 Unbalanced 5-41
* Alternate Cabling Note – CEFD Universal Control Cable CA/WR9378-8 (DB-9M 
DB-9M, 8’), sold separately, is available for use in place of CA/WR9378-4
Figure 5-22 and Figure 5-23 show how to connect a pair of CDM-570/A modems together with
the CRS-180; the table for each figure lists the cable assemblies provided in the KT/11559 kit for
this initial setup. See Sect. 5.4.1.1 for the CDM-570/A Modem-to-Switch Control Interface
connection, and Sect. 5.4.1.2 for the CDM-570/A Modem-to-Switch IF Interface connection.