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DMD2401/DMD2401L/DMD2401 IBS/IDR Satellite Modem
Section 7 – Technical Specifications
7.0 Introduction
This section defines the technical performance parameters and specifications for the DMD2401
and DMD2401L Satellite Modems.
7.1 Transmit and Receive Data Rates
(Optional)
Data Rate Setting:
7.2 Modulator Specifications
Frequency Range:
Frequency Stability:
Level Control:
Level Stability:
Impedance:
Return Loss:
Output Off Isolation:
Spurious Output:
FEC:
Differential Encoding:
Scrambler:
7.3 Demodulator Specifications
Frequency Range:
Input Carrier Range:
Acquisition/Tracking:
Reacquisition range:
IF Input Impedance:
Return Loss:
FEC:
TM065 - Rev. 3.3
BPSK, 1/2 Rate
4800 bps – 1250 Kbps
BPSK, 3/4 Rate
7200 bps – 1875 Kbps
BPSK, 7/8 Rate
8400 bps – 2187.5 Kbps
QPSK, 1/2 Rate
9600 bps – 2500 Kbps
QPSK, 3/4 Rate
14400 bps – 3750 Kbps
QPSK, 7/8 Rate
16800 bps – 4375 Kbps
OQPSK, 1/2 Rate
9600 bps – 2500 Kbps
OQPSK, 3/4 Rate
14400 bps – 3750 Kbps
OQPSK, 7/8 Rate
16800 bps – 4375 Kbps
8PSK, 2/3 Rate
Selectable in 1 bps steps
50 – 90 and 100 – 180 MHz (or 950 – 1750 MHz
Optional L-Band), 1 Hz steps
2.5 ppm (220 Hz at 88 MHz)
-5 to -30.0 dBm, 0.1 dB steps
0.5 dB from 0 to 50° C
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20 dB (minimum)
> 60 dB
< -55 dBc In-Band
< -45 dBc Out-of-Band
1/2, 3/4, and 7/8 Viterbi, K = 7
1/2, 3/4, 7/8 Sequential (Optional)
2/3 Trellis (Optional)
Selectable On or Off
Intelsat V.35, mode selectable
50 – 90 and 100 – 180 MHz (or 950 – 1750 MHz
Optional L-Band), 1 Hz steps
C
+ 10 log (Symbol Rate)
o
C
min = -118
o
C
max = -93
o
1 kHz to 42 kHz, 1 kHz steps
1 kHz to 42 kHz, 1 kHz steps
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20 dB (minimum)
1/2, 3/4, and 7/8Viterbi, K = 7
1/2, 3/4, and 7/8 Sequential (Optional)
2/3 Trellis (Optional)
Technical Specifications
7-1
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