Cabling To The Cdm-625 - Comtech EF Data CRS-180 Installation And Operation Manual

CRS-180 70/140 MHz IF 1:1 Redundancy Switch
Cables and Connections
4.2

Cabling to the CDM-625

1. For information on the CDM‐625's 1:1 auto‐enable functionality, see:
• Chapter 3. MODEM AND SWITCH CONFIGURATION
• CDM‐625 Advanced Satellite Modem Installation and Operation Manual
2. For information on the cables and cable assemblies specified in this section, see:
• Appendix A. CABLE DRAWINGS
4.2.1 CRS-180
Terrestrial data interface components/kits must be ordered separately. See Sect.
4.2.4 for CDM‐625 terrestrial data interface configuration and connection
examples and details.
Comtech EF Data's KT‐0000159 1:1 Redundancy Control/IF Interface Cabling Kit is required for
control and 70/140 MHz switch‐to‐modem cabling connections:
KT-0000159 1:1 Redundancy Control / IF Interface Cabling Kit (CRS-180
CEFD Part No.
PL/11560-1
CA/WR9378-4
PL/0946-1
XF/BNC-MF-50-75
See Sect. 4.2.2 and Figure 4‐1 in this chapter for details of the CDM‐625 Modem‐to‐Switch
Control Interface connection, and Sect. 4.2.3 and for details of the CDM‐625 Modem‐to‐Switch
IF Interface connections. These figures illustrate how to connect a pair of CDM‐625 modems
together with the CRS‐180 70/140 MHz IF 1:1 Redundancy Switch module; the table that
accompanies each figure lists the cables provided in KT‐0000159 for this initial setup.
(CEFD P/N MN‐CDM625)
CDM-625 Control and IF Interface Cabling Kit KT-0000159
Qty Description
1 CRS-180 Switch – Top Assembly
2 Control Cable – Universal, DB-9M
IF (Tx/Rx) Coax Cable – 50Ω Type 'BNC', 4'
4
2
Transformer, 50-75Ω, 2-200 MHz, BNC, M/F
DB-9M, 4' Modem
4–3
Revision 8
MN/CRS180.IOM
CDM-625)
Used For
1:1 Redundancy
Switch Control
Modem Switch IF
Interface
User Switch IF
Interface
Ch. 4
Fig
4-1
4-2
4-1
4-2
4-2