Product specifications

CRS-180 70/140 MHz IF 1:1 Redundancy Switch MN/CRS180.IOM
Cables and Connections Revision 11
5–3
5.2 Cabling to the CDM-625 or CDM-625A
1) For information on the CDM-625/A’s 1:1 auto-enable functionality, see:
• Chapter 4. MODEM
AND SWITCH CONFIGURATION
• CDM-625A Advanced Satellite Modem Installation and Operation Manual
(CEFD P/N MN-CDM625A)
• CDM-625 Advanced Satellite Modem Installation and Operation Manual
(CEFD P/N MN-CDM625)
2) For information on the cables and cable assemblies specified in this section, see
Appendix A. CABLE DRAWINGS
5.2.1 CRS-180CDM-625/A Control and IF Interface Connections Using
Cabling Kit KT-0000159
You must order terrestrial data interface components/kits separately. See Sect. 5.2.2
for CDM-625/A terrestrial data interface configuration and connection examples and
details.
You must use the Comtech EF Data KT-0000159 1:1 Redundancy Control/IF Interface Cabling Kit
for your control and IF switch-to-modem cabling connections:
KT-0000159 1:1 Redundancy Control / IF Interface Cabling Kit (CRS-180CDM-625/A)
CEFD P/N Qty Description Used For
Ch. 5
Fig
PL/11560-1 1 CRS-180 Switch – Top Assembly 1:1 Redundancy
5-1
5-2
CA/WR9378-4* 2 Control Cable – Universal, DB-9MDB-9M, 4’
ModemSwitch Control
5-1
PL/0946-1
4
IF (Tx/Rx) Coax Cable – 50Ω Type ‘BNC’, 4’
Modem

Switch IF
Interface
5-2
XF/BNC-MF-50-75 2
Transformer, 50-75Ω, 2-200 MHz, BNC, M/F
UserSwitch IF Interface 5-2
* 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
See Sect. 5.2.1.1 for the CDM-625/A Switch-to-Modem Control Interface connection, and Sect.
5.2.1.2 and for the CDM-625/A Switch-to-Modem IF Interface connections. The table that
accompanies each figure lists all cables and components needed from the KT-0000159 kit for
this initial switch-to-modem setup.
CAUTION – It is ESSENTIAL that you make the control and the IF Rx and Tx
connections correctly
.