Cabling The Sdm-300L3 - Comtech EF Data CRS-170A Installation And Operation Manual

CRS-170A L-Band 1:1 Redundancy Switch
Cables and Connections

5.13 Cabling the SDM-300L3

1) For information on configuring the CRS-170A L-Band 1:1 Redundancy Switch with the
SDM-300L3 Satellite Modems for 1:1 operation, see:
• Chapter 4. MODEM
• SDM-300L3 Satellite Modem Installation and Operation Manual
(CEFD P/N MN/SDM300L3.IOM)
• SMS-301 Redundancy Switch Installation and Operation Manual
(CEFD P/N MN/SMS301.IOM)
2) For information on the cables and cable assemblies specified in this section, see
Appendix A. CABLE DRAWINGS.
Figure 5-65 shows the block diagram for connecting a pair of SDM-300L3 Satellite Modems together with
the SMS-301 and CRS-170A switches. This figure also provides a table that identifies the cable assemblies
that may be supplied with the CRS-170A in this configuration. The other cables between the SMS-301 and
the SDM-300L3 are the same as are supplied with the SMS-301 in an SDM-300A application.
When you connect the Control Interface cables between the CRS-170A, the SMS-301, and
the modems, make sure that you securely fasten the screw locks on the Type 'D' connectors.
This prevents accidental disconnection of the cables, particularly when you are removing
and replacing a standby unit.
CEFD Part No.
CA/WR10163-1
CA/RF10453-4
Figure 5-65. SDM-300L3 Block Diagram – Cable Connections
SWITCH CONFIGURATION
AND
Qty Description
1 Cable – Control, SMS-301  CRS-170A, DB-15M  DB-9M, 4'
4 RoHS-Compliant Cable – IF (Tx/Rx), 50 Ω Type 'N', 4'
5–79
MN/CRS170A.IOM
Revision 14