Comtech EF Data SDM-300L3 - Manual (Page 95)

SDM-300L3 Satellite Modem Revision 1
Front Panel Operation MN/SDM300L3.IOM
4–27
4.6.1.3 FUNCTION SELECT: CONFIGURATION: INTERFACE
CONFIGURATION
INTERFACE
Press to review or edit the following sub-menus.
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 reference
clock (Ext Clock).
TX Data Rate and Ext Clock frequency shall match or unless
the ASLT option is installed. 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 to execute the change.