Comtech EF Data SDM-2020 - Manual (Page 78)

SDM-2020 Satellite Demodulator Revision 4
Front Panel Operation MN/SDM2020D.IOM
6–14
Function Select: Configuration: Demodulator: Eb/No Thresh ALM
Eb/No THRESH ALM
OFF
Programs the Eb/No THRESH ALM ON or OFF.
When Off is selected, this function is disabled. When On is selected, the ALARM LED
and ALARM Rely are activated when the measured Eb/N0 falls below the programmed
Eb/N0 THRESHOLD.
On entry, the current setting of the EB/NO THRESHOLD is displayed. Press[
↑] or [↓] to
select the desired setting. Press to execute the change.
Function Select: Configuration: Demodulator: Sweep Range
SWEEP RANGE
100000 Hz
Programs the overall travel of the sweep width range during acquisition. The sweep width
may be programmed from:
• L-Band: 0 to 1,000,000 Hz
• 70/140 MHz: 0 to 120,000 Hz
When set at 100,000 Hz, the demodulator is in Normal acquisition mode (
± 50,000 Hz).
The smaller the range, the faster the demodulator will lock to the receive carrier center
(provided the receive carrier center frequency is within the RX IF frequency sweep
range).
On entry, the current sweep frequency is displayed with a flashing cursor. Press [
←] or
[ →] to move the flashing cursor. Press [↑] or [↓] to increment the digit at the flashing
cursor. Press to execute the change.