Comtech EF Data SDM-300A - Manual (Page 116)

SDM-300A Satellite Modem Revision 6
Front Panel Operation MN/SDM300A.IOM
5–22
5.4.1.3 FUNCTION SELECT: CONFIGURATION: INTERFACE
CONFIGURATION
INTERFACE
Press to review or edit the following commands.
FUNCTION SELECT: CONFIGURATION: INTERFACE:
TX CLOCK SOURCE
TX CLOCK SOURCE
TX TERRESTRIAL
Programs the clock source for the modem transmitter clock to the following configurations:
TX TERRESTRIAL Sets the TX clock to recover timing from the incoming clock/data.
SCT (INTERNAL) Sets the TX clock to operate from the modem internal clock (this is also the
fallback clock).
Note: When loop timing is enabled, SCT (LOOP) is displayed instead of SCT
(INTERNAL).
EXT. CLOCK/DATA CLOCK Sets the TX clock to operate from the external clock on the data I/O connector.
Ext Clock: TX Data Rate and Ext.Clock frequency shall match or ASLT option.
The correct frequency must be programmed into EXT-CLK FREQ.
Upon entry, the current transmit clock setting is displayed. Press [
↑] or [↓] to make the
selection. Press [ENTER] to execute the change.