DMD20 Universal Satellite Modem

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DMD20 Universal Satellite Modem

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  • DoubleTalk Carrier-in-Carrier bandwidth compression
  • BPSK/QPSK/OQPSK/8PSK/8-QAM/16-QAM operation
  • 2.4 kbps to 20 Mbps, 1 bps steps
  • FEC – Viterbi, Reed-Solomon, Sequential, Trellis, TPC, LDPC
  • Configuration, monitor and control features fully user-programmable
  • Excellent spurious performance

SKU: CMT117 Tags: , , , , ,
  • Description
  • Technical Specifications
  • Support Documents

Overview

The DMD20 Satellite Modem breaks new ground in flexibility, operation and cost. With standards including IDR, IBS and DVB, and covering data rates up to 20 Mbps, this 1RU duplex modem covers virtually all your Satellite IP, Telecom, Video and Internet applications. Switch between spur-free 70/140 MHz operation and L-Band without any configuration changes. It’s all in the same box!

DMD20 now offers DoubleTalk® Carrier-in-Carrier® bandwidth compression. DoubleTalk Carrier-inCarrier, based on patented “Adaptive Cancellation” technology, allows transmit and receive carriers of a duplex link to share the same transponder space. DoubleTalk Carrier-in-Carrier is complementary to all advances in modem technology, including advanced FEC and modulation techniques. As these technologies approach theoretical limits of power and bandwidth efficiency, DoubleTalk Carrier-in-Carrier utilizing advanced signal processing techniques provides a new dimension in bandwidth and power efficiency.

Details

  • DoubleTalk Carrier-in-Carrier bandwidth compression
  • BPSK/QPSK/OQPSK/8PSK/8-QAM/16-QAM operation
  • 2.4 kbps to 20 Mbps, 1 bps steps
  • FEC – Viterbi, Reed-Solomon, Sequential, Trellis, TPC, LDPC
  • Configuration, monitor and control features fully user-programmable
  • Excellent spurious performance
  • Fully compliant with IESS-308/309/310/314/315
  • Optional DVB to EN301-210 and EN300-421
  • Industry-standard universal interface module
  • Fast acquisition
  • 50 to 90 MHz and 100 to 180 MHz IF, and 950 to 2050 MHz L-Band in 1 Hz steps
  • Standard features include: Reed-Solomon, asynchronous overhead, satellite control channel and automatic uplink power control
  • SCPC / MCPC Links

Modulator
Modulation BPSK, QPSK, and OQPSK (8PSK, 8-QAM & 16- QAM optional)
IF Tuning Range 50 to 90 and 100 to180 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, L-Band
Return Loss IF: 20 dB minimum
L-Band: 14 dB minimum
Output Power 0 to -25 dBm
Output Stability IF: ±0.5 dB Over frequency and temperature
L-Band: ±1.0 dB Over frequency and temperature
Output Spectrum Meets IESS-308/309/310/DVB-S
Power spectral mask
Spurious -55 dBc In-band (50 to 90 MHz, 100 to 180 MHz, 950 to 2050 MHz)
-45 dBc Out-of-band
On/Off Power Ratio >60 dB
Scrambler CCITT V.35 or IBS (Others optional)
FEC Viterbi, K=7 at 1/2, 3/4 and 7/8
Sequential 1/2, 3/4 and 7/8 (optional)
Trellis 2/3
Turbo Product Code (optional)
BPSK: 21/44
QPSK/OQPSK: 1/2 (21/44), 3/4, 7/8
8PSK/8-QAM, 16-QAM: 3/4, 7/8
Legacy Turbo Rates: 0.495, 0.793 (optional)
LDPC (optional)
BPSK: 1/2
QPSK/OQPSK: 1/2, 2/3, 3/4
8PSK/8-QAM: 2/3, 3/4
16-QAM: 3/4
Outer Encoder Options Reed-Solomon Intelsat (DVB-S optional)
Custom (N, K) Reed-Solomon (optional)
Data Clock Source Internal, external, RX recovered
Internal Stability 1 x 10-6 Typical (optional to 5 x 10-8)
Demodulator
Demodulation BPSK, QPSK, and OQPSK (8PSK, 8-QAM & 16-QAM optional)
IF Tuning Range 50 to 90 and 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 (L-Band)
Return Loss IF: 20 dB minimum
L-Band: 14 dB minimum
Spectrum Intelsat IESS-308/309/310/DVB-S compliant
Input Level 10 x log (symbol rate) – 100, ±12 dB
Total Input Power -10 dBm or +40 dBc (the lesser) @ 256 kbps
FEC Viterbi, K=7 at 1/2, 3/4 and 7/8,
Sequential 1/2, 3/4 and 7/8 (optional)
Trellis 2/3
Turbo Product Code (optional)
BPSK: 21/44
QPSK/OQPSK: 1/2 (21/44), 3/4, 7/8
8PSK/8-QAM, 16-QAM: 3/4, 7/8
Legacy Turbo Rates: 0.495, 0.793 (optional)
LDPC (optional)
BPSK: 1/2
Q-PSK/OQPSK: 1/2, 2/3, 3/4
8PSK/8-QAM: 2/3, 3/4
16-QAM: 3/4
Decoder Options Reed-Solomon Intelsat (DVB-S optional)
Custom (N, K) Reed-Solomon (optional)
Descrambler CCITT V.35 or IBS (Others optional)
Acquisition Range Programmable ±1 kHz to ± 255 kHz
Sweep Delay Value 100 msec to 6000 seconds in 100 msec steps
(View our PDF Datasheet for more information)

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