Comtech EF Data SDM-300L3 - Manual (Page 101)

SDM-300L3 Satellite Modem Revision 1
Front Panel Operation MN/SDM300L3.IOM
4–33
FUNCTION SELECT: CONFIGURATION: INTERFACE:
BUFFER CENTER
BUFFER CENTER
YES/NO
This configuration function is used to center the buffer. Choosing YES centers the buffer.
Press twice to center the buffer.
FUNCTION SELECT: CONFIGURATION: INTERFACE:
LOOP TIMING
LOOP TIMING
OFF
The On setting programs the transmit clocking to the RX satellite clock. TX and RX data
rates must be equal unless the asymmetrical loop timing (ASLT) option is enabled. SCT
is phase locked to the RX Satellite clock.
FUNCTION SELECT: CONFIGURATION: INTERFACE:
TX DATA FAULT (CONDITIONAL)
TX DATA FAULT
NONE
IMPORTANT
Conditional: This menu is only available when the overhead interface
PCB is installed.
Transmit data fault. Press [
↑ ] or [ ↓ ] to select one of the following modes:
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.