Comtech EF Data CDM-550T - Manual (Page 51)

CDM-550T Satellite Modem Revision 3
Front Panel Operation MN/CDM550T.IOM
(CONFIG: RX Æ FEC Æ RATE) FEC RATE
Select Rate 1/2, Rate 3/4 or Rate 7/8 encoding rate, using the [
←] [→] arrow
keys, then press ENTER.
NOTE: If BPSK is selected, only Rate 1/2 is permitted. A warning screen will be
displayed if this sub-branch is entered when in BPSK mode.
If Turbo is selected, the following menu will be displayed:
(CONFIG: RX Æ FEC Æ RATE) FEC RATE (TURBO ONLY)
Select Rate 3/4 (QPSK), Rate 21/44 (BPSK ONLY) Rate 5/16 (BPSK ONLY) ,
Rate 3/4 (OQPSK), or Rate 1/2 (QPSK) decoding rate, using the [
←] [→] arrow
keys, then press ENTER.
SELECT FEC ENCODER RATE:
1/2 3/4 7/8(PRESS ENT)
RX TURBO: 3/4(Q) 21/44(B)
5/16(B) 3/4(OQ) 1/2(Q)(ENT)
Turbo Rate 3/4 OQPSK Incorporated by Version 1.19
Turbo Rate 1/2 QPSK Incorporated by Version 1.24
Note: For further details, see Section 7 - ‘FEC Options’.
6.2.3.2.5 (CONFIG: RX) ACQ (Acquisition sweep range)
Edit the acquisition sweep range of the demodulator. This is accomplished by selecting the digit
to be edited, using the [
←] [→] arrow keys). The value of the digit is then changed using the [↑]
[
↓] arrow keys. The user should then press ENTER.
The range varies from
± 1 kHz to ± 30 kHz.
EDIT RX ACQ SWEEP RANGE:
+/- 25 kHz (PRESS ENTER)
6–15