Comtech EF Data SNM-1002 - Manual (Page 126)

SNM-1002 LinkSync
 Modem
Revision 2
Maintenance MN/SNM1002.OM
5–18
5.2.3.5 Common Equipment Faults
Fault/Alarm Possible Problem and Action
BATTERY/CLOCK M&C battery voltage or clock fault.
Indicates a low voltage in the memory battery. Typically, this fault will
be active when a modem has been hard reset or the firmware has been
changed. When a hard reset has been executed or the firmware has been
changed, this fault will typically be active when the modem is first
turned on.
-12 VOLT SUPPLY -12V power supply fault.
Indicates a high or low voltage condition. Level is
± 5%.
Check for a short on the –12V line from the power supply or on any of
the plug-in boards.
+12 VOLT SUPPLY +12 VDC power supply fault. Use the same procedure as with –12V
fault.
+5 VOLT SUPPLY +5V power supply fault. Use the same procedure as with a –12V fault.
The +5V supply requires a minimum load of 1A.
SELF TEST Self test Fault.
Indicates a failed Self Test by sending a signal through the RF loopback
and IF loopback and checking for quality.
CONTROLLER Controller fault.
Indicates a loss of power in the M&C card. Typically indicates the
controller has gone through a power on/off cycle.
INTERFACE Interface module fault.
Indicates a problem in programming the interface card.