Comtech EF Data SMS-458B User Manual
Page 8
SMS-458B Modem Protection Switch
Revision 2
Preface
MN/SMS458B.IOM
vi
4.8 Power Supply..............................................................................................................................................4–24
4.8.1 General..................................................................................................................................................4–24
4.8.2 Specifications........................................................................................................................................4–24
CHAPTER 5. MAINTENANCE................................................................................... 5–1
5.1 Fault Descriptions ........................................................................................................................................5–1
5.1.1 General....................................................................................................................................................5–1
5.1.2 Modulator Operation Fault .....................................................................................................................5–1
5.1.3 Demodulator Operation Fault .................................................................................................................5–2
5.1.4 M:N Faults ..............................................................................................................................................5–2
5.1.5 Battery Faults..........................................................................................................................................5–3
5.2 Fault Isolation...............................................................................................................................................5–3
5.2.1 Modulator Operation ..............................................................................................................................5–3
5.2.2 Demodulator Operation ..........................................................................................................................5–4
5.2.3 M:N Operation........................................................................................................................................5–5
5.2.4 Battery.....................................................................................................................................................5–6
5.3 Module Replacement ...................................................................................................................................5–7
5.3.1 General....................................................................................................................................................5–7
5.3.2 Power Supply..........................................................................................................................................5–7
5.3.3 IF Switch.................................................................................................................................................5–8
5.3.4 Switch Driver..........................................................................................................................................5–8
5.3.5 Address Decoder/Driver .........................................................................................................................5–8
5.3.6 Monitor and Control ...............................................................................................................................5–8
5.3.7 Online Telemetry ....................................................................................................................................5–8
5.3.8 Interface Switches...................................................................................................................................5–8
5.3.9 Data Switch Controller ...........................................................................................................................5–9
APPENDIX A. CABLING CONFGIURATIONS..........................................................A–1
A.1 General ........................................................................................................................................................ A–1
A.2 SDM-2020 Modulator (TX only) with ECL/HSSI Data Interface ......................................................... A–3
A.3 SDM-2020 Modulator (TX only) with G.703 Data Interface ................................................................. A–6
A.4 SDM-9000 Satellite Modem with 50-Pin Data Interface ....................................................................... A–9