Comtech EF Data SDM-650B Installation And Operation Manual page 282

Asynchronous Overhead Channel Unit
SWP_RACQ
SWP_CNTR
SWP_RNGE
SWP_DIR
F–24
Sets the sweep reacquisition rate from 0 to 999 seconds.
The time selected with this parameter is the time that the modem will
remain in a narrow sweep (± 10%) after acquisition has been
accomplished. After this timer runs out, the modem will return to the
normal sweep.
On entry, the current programmed setting is displayed with a flashing
cursor on the first character. Use [
cursor. Use [ ↑ ] and [ ↓ ] to increment and decrement the digit at the
flashing cursor. Select the number of seconds for the reacquisition
mode from 0 to 999 seconds. Press [ENTER] to execute the change.
Note: This window is only displayed when Fast Acquisition has been
turned ON in the Utility menu.
Programs the sweep center frequency for the directed sweep function.
The sweep center frequency may be set in the range from +25000 to -
25000 Hz.
On entry, the current programmed setting is displayed with the flashing
cursor on the first character. Use [
cursor. Use [ ↑ ] and [ ↓ ] to increment and decrement the digit at the
flashing cursor. Select the sweep center frequency from -25000 to
+25000 Hz. Press [ENTER] to execute the change. When in directed
sweep, the value from the sweep monitor screen (when the modem was
last locked) should be entered for the sweep center frequency.
Note: This window is only displayed when Fast Acquisition has been
turned ON in the Utility menu.
Programs the overall travel of the sweep width range during acquisition
in the directed sweep mode. The sweep width may be set from 0 to
50000 Hz. (When set at 50000 Hz, the modem is in the fast acquisition
mode.)
On entry, the current programmed setting is displayed with a flashing
cursor on the first character. Use [
cursor. Use [ ↑ ] and [ ↓ ] to increment and decrement the digit at the
flashing cursor. Select a sweep range from 0 to 50000 Hz. Press
[ENTER] to execute the change.
When in directed sweep, the smaller the range, the faster the modem
will lock, provided the sweep center frequency is close.
Note: This window is only displayed when Fast Acquisition has been
turned ON in the Utility menu.
Programs the direction of the sweep travel in the directed sweep mode.
On entry, the current programmed setting is displayed with the flashing
cursor on the first character. Use the arrow keys to select Forward (+) or
Reverse (-). Press [ENTER] to execute the change.
SDM-650B Satellite Modem
] and [ ] to move the flashing
← →
← ] and [ → ] to move the flashing
← ] and [ → ] to move the flashing
Rev. 5