Comtech EF Data SNM-1001L - Manual (Page 203)

SNM-1001L Satellite Modem Revision 1
Fault Isolation MN/SNM1001L.IOM
9–7
9.1.3.4 Outdoor Unit
Fault/Alarm Possible Problem and Action
CURRENT ODU Current fault.
VOLTAGE ODU Voltage fault.
TEMPERATURE ODU Temperature fault.
PLL LOCK PLL Lock fault.
Indicates the PLL is not locked to the reference of the interface
transmit clock recovery oscillator. Contact the Comtech EF Data
Customer Support Department.
CHECKSUM Checksum fault.
9.1.3.5 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.
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.