2 demodulator – Comtech EF Data DMD-2050E User Manual
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DMD2050E Universal Satellite Modem
Technical Specifications
MN-DMD2050E Revision 2
7–2
Modulator Specifications
Turbo (16-QAM)
{3/4, 7/8} ≤ 20Mbps
DVB VIT
{2/3, 5/6}
DVB Trellis
{3/4, 5/6, 7/8, 8/9}
LDPC (BPSK)
{1/2}
LDPC (OQPSK/QPSK)
{1/2, 2/3, 3/4}
LDPC (8-PSK/8-QAM)
{2/3, 3/4}
LDPC (16-QAM)
{3/4}
STANAG Turbo (B/QPSK)
{1/2, 2/3, 3/4, 7/8, 19/20, None}
STANAG Turbo (8-PSK)
{1/2, 2/3, 3/4, 7/8, 19/20, None}
STANAG Turbo (16-APSK)
{1/2, 2/3, 3/4, 7/8, 19/20, None}
Outer Encoder Options
Reed-Solomon INTELSAT (DVB Optional)
Custom (N, K) Reed-Solomon
Data Clock Source
Internal, External, Rx Recovered
Internal Stability
5 x 10
-8
7.2 Demodulator
Demodulator Specifications
Demodulation
BPSK, QPSK, OQPSK, 8-PSK, 8-QAM, 16-QAM, 16-APSK
IF Tuning Range
50 to 90, 100 to 180 MHz in 1 Hz Steps
L-Band Tuning Range
950 to 2050 MHz in 1 Hz Steps
Impedance
IF, 50 Ohm (75 Ohm Optional)
L-Band, 50 Ohm
Connector
TNC, 50 Ohm
SMA, 50 Ohm, L-Band
Return Loss
IF, 1.5:1
L-Band, 2.0:1
Spectrum
MIL-188-165A, INTELSAT IESS 308/309/310, DVB
Input Level
-55 to +10 dBm
and 10 log (Symbol Rate) -120 dBm / Hz, SR < 2500 k
Total Input Power
+20 dBm or +40 dBc (the Lesser)
FEC
Viterbi,
{1/2, 3/4, 7/8, None} K = 7
Sequential
{1/2, 3/4, 7/8}
CSC
{3/4}
Trellis (8-PSK)
{2/3}
Turbo (BPSK)
{21/44,5/16} ≤ 20Mbps