Comtech EF Data SDM-300A - Manual (Page 118)

SDM-300A Satellite Modem Revision 6
Front Panel Operation MN/SDM300A.IOM
5–24
FUNCTION SELECT: CONFIGURATION: INTERFACE:
BUFFER CLOCK (CONDITIONAL)
BUFFER CLOCK
RX (SATELLITE)
Programs the interface buffer output clock to one of the following modes:
RX (SATELLITE) Sets the output buffer clock to the satellite clock.
SCT (INTERNAL) Sets the buffer clock to operate from the modem internal clock. This is also the fallback clock.
EXT. CLOCK Sets this clock source to the external clock.
TX TERRESTRIAL Sets the buffer output clock to recover timing from the incoming TX data clock.
INSERT CLOCK Selects the recovered clock from the insert data input received from the terrestrial equipment.
Upon entry, the current setting of the plesiochronous buffer clock is displayed. Press [
↑] or [↓]
to make the selection. Press [ENTER] to execute the change.
Note: Insert Clock selection is only available when D&I overhead is enabled as the RX
Overhead type or when Modem Type is D&I.