Comtech EF Data SNM-1010L - Manual (Page 68)

SNM-1010L Data/Control Modem Revision 0
Front Panel Operation MN/SNM1010L.OM
3.4.1.3.2 CONFIGURATION:INTERFACE:TX CLOCK PHASE
TX CLOCK PHASE
NORMAL
Programs the TX clock phase to AUTO, NORMAL, INVERT.
Upon entry, the current TX clock phase is displayed. Press [ ↑ ] or [↓ ] to make the
selection. When AUTO is selected, the modem will automatically select NORMAL or
INVERT to properly phase the TX clock with the TX data. Press to execute
the change.
3.4.1.3.3 CONFIGURATION:INTERFACE:EXT-CLK FREQ
EXT-CLK FREQ
1544.000 KHZ
Programs the external reference clock input frequency between 8.0 kHz and 10.0 MHz.
Note: The clock rate must be equal to the data rate unless the asymmetrical loop timing
option is present.
This clock frequency can be any multiple of 600 Hz from 2.4 to 64 kHz, and can be any
multiple of 8 kHz from 64 kHz to 4.376 MHz. This can be used for the
Doppler/plesiochronous buffer reference. It can be a reference to SCT.
Use the master clock input on J8 for the external master reference. The EX REF on CP3
only allows for 1, 5, 10, and 20 MHz external reference input.
Upon entry, the current setting for the external reference is displayed. Press [
←] or [→]
to increment or decrement the digit at the flashing cursor. Press [ENTER] to execute the
change.
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