Comtech EF Data SNM-1001L - Manual (Page 198)

SNM-1001L Satellite Modem Revision 1
Fault Isolation MN/SNM1001L.IOM
9–2
9.1.1 System Faults/Alarms
System faults are reported in the “Faults/Alarms ” menu, and stored faults are reported in
the “Stored Flts/Alms” menu.
9.1.2 Faults/Alarms Display
General fault, status, and alarm information are indicated by 10 LEDs located on the
modem’s front panel.
• A fault (red LED) indicates a fault that currently exists in the modem.
• When a fault occurs, it is stored in the stored fault memory, and indicated by the
single yellow LED.
• The LED is turned off when the fault clears. If the fault clears, the occurrence is
also stored.
A total of 10 occurrences of any fault can be stored. Each fault or stored fault indicated
by a front panel LED could be one of many faults. To determine which fault has
occurred, use the Fault or Stored Fault front panel menu.
Alarms are considered minor faults, which will not switch the modem offline in a
redundant system. Alarms are shown in the Fault or Stored Fault front panel menu by a
reversed contrast (white on black) character that appears at the display panel.
9.1.3 Faults/Alarms Analysis
This section describes the possible problems and actions to take for the following faults:
• Modulator
• Demodulator
• Transmit interface
• Receive interface
• Common equipment