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Operation
Time
Date
LAMP TEST ??
Address/Parity/Baud Rate
POW ADJ.
OP MODE
Fast ACQ
3–38
Time of day set/display function.
The current time that the modem is set for is displayed when
selected. To set the modem time press the "ENTER" key and
use the right and left arrow keys to position the flashing
cursor over the parameter to be changed. Use the up and
down arrow keys to change the parameter to the desired
value. Once the parameters are displayed as desired press
the "ENTER" key to set the time.
Date set/display.
Follow the same procedure as outlined for the time function
to view and set the date.
Lamp test function used to illuminate all the front panel
indicators for three seconds.
Press the "ENTER" key to turn on all of the front panel
indicators for three seconds.
The current modem address, parity selection and selected
baud rate of the modem is displayed. This in only a monitor
function. No changes can be made from this menu.
On entry the currently set address of the modem will be
displayed (0 to 255) on the first line. The currently set parity,
even or odd, will be displayed on the second line. The
currently set baud rate from 110 to 9600 will also be
displayed on the second line.
Modulator Power Adjust Offset.
Allows the operator to offset the modulator output power
readout in the configuration 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 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 dB in 0.5 dB increments.
Note: The maximum output power adjust, set in this window,
must match the maximum output power of the modulator
installed in the modem. In a switching system the backup
modem must be set the same as the prime modem or a fault
will occur.
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 the "ENTER" key to execute the change.
When TX only or RX only is selected, the appropriate faults
are masked from the Faults and Stored Faults 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.
SDM-309B Satellite Modem
MN/U-SDM309B Rev. #
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