Comtech DMD20 LBST L-Band Satellite Modem and ODU Driver

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Product Information

  • Type: Mid Speed SCPC
  • Frequency: L
  • Brand: Comtech EF Data
  • SKU: CMT118

Tech Specifications

Datasheet PDF


The DMD20 LBST L-Band 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.

DMD20 LBST now offers DoubleTalk® Carrier-in-Carrier® bandwidth compression. DoubleTalk Carrier-in-Carrier, 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.


  • FSK M&C channel for smart BUCs
  • Integrated 10 MHz high-stability reference
  • Programmable 13, 15, 18, or 20 VDC for LNB
  • Optional 24 or 48 VDC for up to 10 W BUC
  • 950 to 2050 MHz L-Band TX/RX operation
  • BPSK/QPSK/OQPSK/8PSK/8-QAM/16-QAM operation
  • 2.4 kbps to 20 Mbps, 1 bps steps
  • Configuration, monitor and control features full user-programmable
  • FEC - Viterbi, Reed-Solomon, Sequential, Trellis, TPC, Low Density Parity Check Code (LDPC)
  • 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
  • Standard features include: Reed-Solomon, Asynchronous Overhead, automatic uplink power control and CM701 compatible satellite control channel
  • SCPC / MCPC Links

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