Comtech EF Data DMD-2050E - Manual (Page 16)

DMD-2050E Universal Satellite Modem Revision 2
Table of Contents MN-DMD2050E
viii
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