Comtech EF Data SDM-2020, Installation And Operation Manual

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SDM-2020 Satellite Demodulator Operation
Rev. 3 3–9
SDM-2020 DEMOD
VER: X.X.X
FUNCTION SELECT
CONFIGURATION
CONFIGURATION
DEMODULATOR
RX-DR QPSK 3/4
(Data Rate)
LNB POWER
ON
OFF
(L-Band RF only)
ACCESS TO
SUBMENU
CONDITIONAL OR
OPTION-DEPENDENT
Parameter Information
Key:
RX-SR QPSK 3/4
(Symbol rate)
QPSK 1/2, 3/4, 7/8, 2/3, 5/6
8PSK 2/3, 5/6, 8/9
16QAM 3/4, 16QAM 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
ON
OFF
RS DECODER
CORR ON
CORR OFF
Eb/No THRESHOLD
NONE
1.0 E- x
(where x = 3 to 8)
Code Rate
QPSK 1/2
QPSK 3/4
QPSK 7/8
QPSK 5/6
QPSK 2/3
8PSK 2/3
8PSK 5/6
8PSK 8/9
16QAM 3/4
16QAM 7/8
Data Rate
6.312 Mbit/s
8.448 Mbit/s
32.064 Mbit/s
34.368 Mbit/s
44.736 Mbit/s
51.840 Mbit/s
(with G.703
Interface)
Eb/No THRESHOLD
NONE
3.0 tO 16.0, in 0.1 dB steps
Eb/No THRESH ALM
ON
OFF
REACQUISITION
0 to 1,000,000 Hz
RF INPUT SELECT
1, 2, 3, 4
With 4-Channel RF Card
Installed.
SWEEP RANGE
0 to 1,000,000 Hz
(L-Band only)
SWEEP RANGE
0 to 120,000 Hz
(70/140 MHz)
Figure 3-4A. Configuration Demodulator Menu with G.703 Data Interface