Comtech EF Data SDM-2020, Installation And Operation Manual

Page: 52 / 215

Operation SDM-2020 Satellite Demodulator
3–8 Rev. 3
SDM-2020 DEMOD
VER: X.X.X
FUNCTION SELECT
CONFIGURATION
CONFIGURATION
DEMODULATOR
RX-DR QPSK 1/2
(Data Rate)
LNB POWER
QPSK 1/2, 2/3, 3/4, 5/6,7/8
8PSK 2/3, 5/6, 8/9
16QAM 3/4, 7/8
1 bit/s steps limited by code
rate and interface.
ON
OFF
L-Band only
ACCESS TO
SUBMENU
CONDITIONAL OR
OPTION-DEPENDENT
Parameter Information
Key:
RX-SR QPSK 1/2
(Symbol rate)
QPSK 1/2, 2/3, 3/4, 5/6,7/8
8PSK 2/3, 5/6, 8/9
16QAM 3/4, 7/8
1 sym/s steps limited by code
rate and interface.
RX-IF FREQUENCY
950 to 1750 MHz
(in 2.5 kHz steps)
L-Band only
RX-IF FREQUENCY
50 to 180 MHz
(in 2.5 kHz steps)
Non L-Band only
ENERGY DISPERSAL
(Descrambler)
ON
OFF
RS DECODER
CORR ON
CORR OFF
BER THRESHOLD
NONE
1.0 E-x
(where x = 3 to 8)
Eb/No THRESHOLD Eb/No THRESH ALM
NONE
3. 0 to 16.0, in 0.1 dB steps
0 to 1,000,000 Hz
(L-Band only)
SWEEP RANGE
0 TO 120,000 Hz
(70/140 MHz)
SWEEP RANGE
ON
OFF
REACQUISITION
0 to 999 Seconds
RF INPUT SELECT
1,2,3, or 4
(4-Channel RF Card only)
Figure 3-4. Configuration Demodulator Menu without G.703 Data Interface