Cabling To The Cdm-570 Or Cdm-570A; Cdm-570/A Control And If Interface Connections Using Cabling Kit Kt/11599 - Comtech EF Data CRS-180 Installation And Operation Manual

CRS-180 70/140 MHz IF 1:1 Redundancy Switch
Cables and Connections
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
• CDM-570/CDM-570L/CDMR-570L Satellite Modem Installation and
• CDM-570A/CDM-570AL/CDMR-570AL Satellite Modem Installation and
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
CEFD P/N
PL/11560-1
PL/0946-1
CA/WR9378-4*
XF/BNC-MF-50-75
CA/RB10461-1
CA/WR10522-1
KT/10553-1
* 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.
AND
Operation Manual (CEFD P/N MN/CDM570L.IOM)
Operation Manual (CEFD P/N MN-CDM570A)
Qty/Kit
Description
(REF)
1 CRS-180 Switch – Top Assembly
4 IF (Tx/Rx) Coax Cable, 50Ω Type 'BNC', 4'
2 Control Cable – Universal, DB-9MDB-9M, 4'
2 Transformer, 50-75Ω, 2-200 MHz, BNC, M/F
1 Cable – 1:1 Y-Splitter, (2X) DB-25MDB-25F
1
Cable – 1:1 Y-Splitter, (2X) DB-15MDB-15F
G.703 Unbalanced Interface Kit containing:
1 (Qty 4) CA/BNC75OHM Cable – IF BNC, 1'
(Qty 2) CN/BNC-Tee-JPJ T-Adapter, 50Ω BNC
SWITCH CONFIGURATION
5–25
MN/CRS180.IOM
Revision 11
CDM-570/A)

Ch. 5
Used For
Fig
5-36
1:1 Redundancy
5-37
ModemSwitch IF
5-37
Interface
ModemSwitch
5-36
Control
User IF Tx/Rx
5-37
Interface
EIA-422/232
5-39
Interface
G.703 Balanced 5-40
G.703 Unbalanced 5-41