Comtech EF Data SNM-1010L - Manual (Page 187)

SNM-1010L Data/Control Modem Revision 0
System Checkout MN/SNM1010L.OM
7.2.1 Faults/Alarms Display
General fault, status, and alarm information are indicated by 8 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 red 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. Refer to
Chapter 3 for information on 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.
7.2.2 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
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