Operating instructions

Technical Specifications DMD20/DMD20 LBST Universal Satellite Modem
7-2 TM103 – Rev. 2.8
7.2 Demodulator
Demodulation BPSK, QPSK, and OQPSK (8PSK, 16QAM Optional)
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, 75-Ohm (50-Ohm optional)
L-Band, 50-Ohm
Connector BNC - 75 Ohm
SMA - 50 Ohm
N-type 50-Ohm LBST
Return Loss IF, 20 dB Minimum
SMA, 50-Ohm, L-Band
L-Band, 14 dB Minimum
Spectrum INTELSAT IESS 308/309/310 Compliant
Input Level 10 x log (Symbol Rate) - 100, ±12 dB
Adjacent Channel Rejection Ratio >+10 dBc
Total Input Power -10 dBm or +40 dBc (the Lesser) @ 256 Kbps
FEC Viterbi 1/2, 3/4 and 7/8
DVB Viterbi 1/2, 2/3, 3/4, 5/6, 7/8
Sequential 1/2, 3/4, 7/8 (optional)
Trellis 2/3
DVB PTCL 2/3, 5/6, 8/9, 3/4, 7/8
Turbo Product Code (Optional)
0.495 Legacy Turbo< 5 Mbps
0.793 Legacy Turbo< 5 Mbps
21/44 Turbo
1/2 Turbo
3/4 Turbo
7/8 Turbo
(Turbo Supported at all Modulation Types)
Decoder Options Reed-Solomon INTELSAT (DVB Optional, Custom
Rates Optional)
Descrambler CCITT V.35 or IBS (Others Optional)
Acquisition Range Programmable ±1 kHz to ± 255 kHz
Sweep Delay Value 100 msec to 6000 sec. in 100 msec Steps
7.3 Plesiochronous Buffer
Size 0 msec to 64 msec
Centering Automatic on Underflow/Overflow
Centering Modes IBS: Integral Number of Frames
IDR: Integral Number of Multi Frames
Clock Transmit, External, Rx Recovered or SCT (Internal)
7.4 Monitor and Control
Remote RS-485/Terminal RS-232/Ethernet 10 Base-T/Web Browser,
DMD15 Protocol Compatible