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SDM-300A Satellite Modem
REACQUISITION
RS DECODER
(Test Mode Configuration)
Rev. 4
Programs the sweep reacquisition mode time duration. This is the time
that the modem will remain in a narrow sweep after loss of acquisition.
After this timer runs out, the modem will return to the normal
acquisition sweep. The reacquisition time is 0 to 999 seconds.
Upon entry, the current programmed setting is displayed with a flashing
cursor on the first character. Press [←] or [→] to move the flashing
cursor. Press [↑] or [↓] to increment or decrement the digit at the
flashing cursor. Select the number of seconds desired for the
reacquisition mode. Press [ENTER] to execute the change.
Programs the Reed-Solomon decoder on, Correction off, or off.
Upon entry, the status of the Reed-Solomon decoder is displayed. Use
[↑] or [↓] to select one of the following modes:
•
ON: Enables the Reed-Solomon decoder to provide data error
corrections.
•
CORRECTION_OFF: Turns off the Reed-Solomon decoder
data error correction circuitry. Data flow is then routed through
normal data paths without error corrections. This is used to
compare the BER of a SATLINK with or without Reed-
Solomon decoding.
•
OFF: The RS decoder is normally disabled (off position). To
execute any of the Reed-Solomon decoder modes, enter the
desired Reed-Solomon decoder and select the desired mode.
Press [ENTER] to execute the change.
Note: If none of the proper overhead types or data rates apply, the Reed-
Solomon decoder in the on state will be rejected (double beep). With the
Reed-Solomon decoder turned on (not off or Correction off), the
corrected BER will be reported from the outer decoder (Reed-Solomon
decoder).
Operation
3–15
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