Comtech EF Data SDM-300A - Manual (Page 156)

SDM-300A Satellite Modem Revision 6
Front Panel Operation MN/SDM300A.IOM
5–62
FUNCTION SELECT: FAULTS/ALARMS: TX INTERFACE
TX INTERFACE
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TX DROP Drop interface hardware fault. Typically indicates that the drop interface
PLL is not locked (D&I only).
TX DATA/AIS Data or AIS. When data fault is selected in the Interface Configuration
menu, the fault indicates a data stable condition. This indicates the data is
all 1s or 0s (i.e., data is not transitioning). When AIS is selected, the alarm
indicates the data is all 1s from customer data input to the modem. When
None is selected in the Interface Configuration menu, the TX Data/AIS
Fault/Alarm is not activated.
Note: AIS is an alarm, not a switching fault.
TX CLK PLL Transmitter phase-locked loop fault. Indicates the transmitter
Phase-Locked Loop (PLL) is not locked.
TX CLK ACTIVITY Activity detector alarm of the selected interface transmit clock. The
interface will fall back to the internal clock when this alarm is active.
TX AUDIO 1 CLIP IDR TX audio for channel 1 is clipped.
TX AUDIO 2 CLIP IDR TX audio for channel 2 is clipped.
CONFIGURATION TX interface configuration fault.
Indicates the TX interface cannot execute a programmed configuration
parameter.