Comtech EF Data CDM-700 - Manual (Page 87)

CDM-700 High Speed Satellite Modem Revision 5
Front Panel Operation MN/CDM700.IOM
6–33
If Intfc1 Rx Buffer: Æ ReCenter is selected:
Intfc1 Buffer Fill:
(046%) ReCenter (E)
The percentage (046%) indicates the current buffer fill status. Select Re-Center, using the
◄ ►
arrow keys, to reset the buffer to the midpoint (50%). Press
ENTER
.
If Intfc1 OC-3 Rx: Æ Clk is selected:
Intfc1 Rx Clock:
Rx-Sat Tx-Terr Internal (E)
This selection determines which source clocks the output of the Rx Buffer for delivering data to
the Rx port at the user interface.
Select Rx-Sat, Tx-Terr or Internal using the
◄ ► arrow keys. Press
ENTER
. The selections
are as follows:
Selection Description
Rx-Sat (default)
Effectively disables the Rx Buffer because the input and output
clocks are the same. Normally, the Rx Buffer is set for minimum
when Rx-Sat is selected.
Tx-Terr Uses the clock from the Tx input to clock out the Rx Buffer.
Internal
The Internal Clock comes from the modem. It is derived from either
the Ext Ref (J7) or Int Ref oscillator (10 MHz) in the main part of the
modem, not from the data interface.
If Intfc1 OC-3 Rx: Æ Ena/Dis is selected:
Intfc1 Rx Status:
Enable Disable (E)
This selection activates or deactivates the receive (Rx) side of this interface. Disabling the Rx
side deactivates it and changes the data rate to 0.
Select Enable or Disable using the
◄ ► arrow keys. Press
ENTER
.
If Intfc1 OC-3 Rx: Æ Mode is selected:
Intfc1 Line Mode:
Optical Coax (E)
Select Optical or Coax using the ◄ ► arrow keys. Press
ENTER
.