Comtech EF Data SNM-1000 - Manual (Page 65)

SNM-1000 Node Control Modem Revision 3
Operation MN/SNM1000.IOM
3–23
3.4.3.4 FAULTS AND ALARMS:RX INTERFACE
RX INTERFACE
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BUFFER UNDERFLOW Buffer underflow alarm. Indicates that a buffer underflow has
occurred.
BUFFER OVERFLOW Buffer overflow alarm. Indicates that a buffer overflow has
occurred.
RX DATA/AIS Data or AIS. When data fault is selected in the Configuration
Interface menu, the fault indicates a data stable condition. This
indicates the data coming from the satellite is all 1s or 0s (i.e.,
data is not transitioning). When AIS is selected, the Alarm
indicates the data is all 1s from the satellite. When None is
selected in the Configuration Interface menu, the RX Data/AIS
Fault/Alarm is not activated.
Note: AIS is an alarm, not a switching fault.
FRAME BER Frame BER fault. Indicates that the frame BER exceeds 1 -3 .
BACKWARD ALARM Not Applicable.
BUFFER CLK PLL Buffer clock phase-locked loop fault. Indicates the buffer clock
PLL is not locked.
BUFFER CLK ACT Activity detector alarm of the selected interface receive clock.
The interface will fall back to the satellite clock when this fault is
active.
DEMUX LOCK DEMUX lock fault. Indicates that the DEMUX is not locked.
RX 2047 LOCK RX 2047 lock alarm. Indicates the RX 2047 data pattern is not
locked.
Note: This alarm is only active if RX 2047 is ON.
BUFFER FULL Buffer full alarm. Indicates the buffer is less than 10% or greater
than 90% full.
RX INSERT Not Applicable.
RX AUDIO 1 CLIP Not Applicable.
RX AUDIO 2 CLIP Not Applicable.
CONFIGURATION Configuration alarm.