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DMD20 Universal Satellite Modem

 

Featuring DoubleTalk® Carrier-in-Carrier®

 
  • Overview
  • Key Features
  • Users & Applications
  • Accessories
Cellular Application ImageWith 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!

The extensive list of software options allows for budgeting the modem for today's needs while covering tomorrow's plans.  These options can be purchased and then activated in seconds via the front panel.

The DMD20 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.

Additional hardware options like Turbo, LDPC, Interface Expansion, High Stability and DC operation complete the modem's dynamic feature coverage.

Product Specifications

Key Features
  • DoubleTalk Carrier-in-Carrier bandwidth compression
  • BPSK/QPSK/OQPSK/8-PSK/8-QAM/16-QAM Operation
  • 2.4 kbps to 20 Mbps, 1 bps Steps
  • FEC - Viterbi, Reed-Solomon, Sequential, Trellis, Turbo Product Code, Low Density Parity Check Code
  • 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
Product Specifications
DMD20 ApplicationTypical Users
  • Cellular Backhaul
  • Government & Military

Common Applications
  • Cellular Backhaul
  • G.703 Trunking
  • IP Trunking
 
 
 
 
 

Notice: Comtech EF Data reserves the right to change specifications of products described in these documents at any time without notice and without obligation to notify any person of such changes.  Information in these documents may differ from information published in other Comtech EF Data documents.

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