Comtech EF Data SDM-300A - Manual (Page 123)

SDM-300A Satellite Modem Revision 6
Front Panel Operation MN/SDM300A.IOM
5–29
FUNCTION SELECT: CONFIGURATION: INTERFACE:LOOP TIMING
LOOP TIMING
OFF
Loop Timing: On or Off
Programs the transmit clocking to the RX satellite clock.
TX and RX data rates must be equal unless the asymmetrical loop timing option is enabled.
FUNCTION SELECT: CONFIGURATION: INTERFACE:TX DATA FAULT
(CONDITIONAL)
TX DATA FAULT
NONE
IMPORTANT
Conditional: This command is only available when the overhead
interface PCB is installed.
This is a test mode.
TtRANSMIT DATA FAULT. Press [
↑] or [↓] to make the selection. Press [ENTER] to execute
the change.
NONE The transmit interface fault Data/AIS is not activated.
ALARM INDICATION SIGNAL
(AIS) Sets transmit interface fault Data/AIS to monitor a fault
condition of all 1s from customer data input to the modem.
DATA Sets transmit interface fault Data/AIS to monitor a fault
condition of all 1s or 0s. This is referred to as a data-stable
condition, which means that the data is not transitioning.