Comtech EF Data DMD-2050E Installation And Operation Manual page 53

DMD-2050E Universal Satellite Modem
Table of Contents
4.5 Terminal Mode Control............................................................................................................ 4-38
4.5.1 Terminal Mode Screens ...................................................................................................... 4-38
4.5.2 Terminal Mode Operations ................................................................................................. 4-38
4.5.3 Setup for Terminal Mode .................................................................................................... 4-39
CHAPTER 5. EXTERNAL CONNECTIONS .......................................................................... 5-1
5.1 Power Connectors, Ground and Switches ................................................................................ 5-2
5.1.1 Ground Connector ................................................................................................................. 5-2
5.1.2 Power Switch ........................................................................................................................ 5-2
5.2 Front Panel Connections ............................................................................................................ 5-3
5.2.1 Key Loader Interface ............................................................................................................ 5-3
5.3 Rear Panel Connectors ............................................................................................................... 5-4
5.3.1 HSSI / Ethernet Connectors .................................................................................................. 5-4
5.3.2 EXT REF (J10) ..................................................................................................................... 5-5
5.3.3 IF Connectors (Transmit and Receive) J11, J12, J13, J14 .................................................... 5-5
5.3.4 ALARM (J15) ....................................................................................................................... 5-6
5.3.4.1 IBS Network Alarms Configuration ................................................................................. 5-7
5.3.4.2 Closed Net Alarms Configuration ..................................................................................... 5-7
5.3.4.3 RTS Carrier Alarms Configuration ................................................................................... 5-7
5.3.5 EXT CLK (J16) ..................................................................................................................... 5-7
5.3.6 ASYNC (J17) ........................................................................................................................ 5-8
5.3.7 ANT. HANDOVER (J18) (Future Option) ........................................................................... 5-8
5.3.8 MIL-188-114A (J19)............................................................................................................. 5-9
5.3.9 Monitor and Control Connectors J20, J21 .......................................................................... 5-10
CHAPTER 6. MAINTENANCE AND TROUBLESHOOTING ................................................ 6-1
6.1 Periodic Maintenance ................................................................................................................. 6-1
6.1.1 Battery Replacement ............................................................................................................. 6-1
6.1.2 Clock Adjustment ................................................................................................................. 6-1
6.1.3 Fuse Replacement ................................................................................................................. 6-1
6.2 Troubleshooting .......................................................................................................................... 6-2
6.2.1 Basic Troubleshooting Procedures ........................................................................................ 6-2
6.2.2 Troubleshooting Symptoms and Causes ............................................................................... 6-2
6.2.2.1 Symptom: The modem does not acquire the incoming carrier. ....................................... 6-2
6.2.2.2 Symptom: The ASYNC port is not configured correctly. ................................................ 6-2
6.3 Alarms .......................................................................................................................................... 6-3
6.3.1 Major Transmit Alarms ......................................................................................................... 6-3
6.3.2 Major Rx Alarms .................................................................................................................. 6-3
6.3.3 Minor Tx Alarms .................................................................................................................. 6-4
6.3.3.1 Minor Rx Alarms .............................................................................................................. 6-5
6.3.3.2 Drop and Insert Alarms ..................................................................................................... 6-6
6.3.3.3 Common Major Alarms .................................................................................................... 6-6
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MN-DMD2050E