Comtech EF Data C5 - Manual (Page 162)

Operation C5/K1/K3 Integrated Satellite Terminal System
4–36 Rev. 0
4.1.3.8.4 Receive Interface Faults
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 (Figure 4-6), 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 .
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.
4.1.3.8.5 Common Equipment Faults
BATTERY/CLOCK Battery or clock fault.
-12V SUPPLY -12V power supply fault.
+12V SUPPLY +12V power supply fault.
+5V SUPPLY +5V power supply fault.
CONTROLLER Controller fault. Typically indicates the controller has gone
through a power on/off cycle.
INTERFACE MODULE Interface module fault. Typically indicates that the interface
module is missing or will not program.
SELF TEST Built in self-test fault.
IDU POWER SUPPLY IDU Power Supply fault. Typically indicates that the power
supply is missing or will not program.
4.1.3.8.6 Outdoor Unit
MODULE Module fault
COMMUNICATION Communication alarm.