Comtech EF Data SDM-650B Installation And Operation Manual page 122

Operation
POW ADJ
OP MODE
Fast ACQ
BERT_set
BUF_CNTL
FILTERS ADJUST
4–20
Modulator power adjust offset.
Allows the user to offset the modulator output power readout in the
Config menu. This will be the highest modulator power that will be
displayed and programmed. This feature does not actually change the
modulator power level. The function is used to change the actual reading
to display an offset value in the monitor. The modulator power offset can
be set between +20.0 to -20.0 dBm, in 0.5 dBm increments.
Operation Mode. Programs the modem operation for TX-only, RX-only,
or Duplex operation.
On entry, the flashing cursor is on the first character of the display. Use
the arrow keys to select TX-only, RX-only, or Duplex. Press [ENTER] to
execute the change. When TX-only or RX-only is selected, the
appropriate faults are masked from the Faults and StFaults menu.
Fast acquisition function.
Turns the fast acquisition and directed sweep function ON or OFF. When
the fast acquisition has been turned OFF, the SWP_Cntr, SWP_RNGE,
and SWP_DIR windows in the Configuration menu are disabled and do
not appear. Also, in the Monitor menu, Swp_Freq will not appear. When
turned OFF, fast acquisition does not occur.
This function is used to set the BER threshold.
If the BER threshold set is exceeded, a receive fault will be indicated by
the modem status indicators. BER threshold may be set from 1E-3 to 1E-
8. BER threshold may be disabled by specifying None.
On entry, the current setting of the BER threshold is displayed. Use [
and [ ↓ ] to select the desired setting. Press [ENTER] to execute the
change.
ON/OFF.
This is a factory setting. The operator is not allowed to enter this
parameter without authorization from EFData Customer Support
Department. Failure to comply will result in a modem failure.
SDM-650B Satellite Modem
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Rev. 5