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Comtech EF Data SDM300A Satellite Modem

Fully configured, the SDM-300A will meet or exceed all of the applicable requirements in IESS-308, 309, and 310 and is available with a full range of industry standard digital interfaces.
Features:
  • Flex Mux
  • 8PSK Modulation
  • Built-In Self Test
  • Fast Acquisition
  • Reed-Solomon
  • Asynchronous Channel Unit Overhead
  • Automatic Uplink Power Control (AUPC)
  • Drop and Insert (D&I)
  • INTELSAT Business Services (IBS)
  • Intermediate Data Rate (IDR)
  • Fully Accessible System Topology (FAST)
  • 2.4 kbit/s to 5 Mbit/s
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Fully configured, the SDM-300A will meet or exceed all of the applicable requirements in IESS-308, 309, and 310 and is available with a full range of industry standard digital interfaces.

COMPATIBILITY

Maintaining Comtech EFData's excellent history of modem compatibility, the SDM-300A is a direct replacement for many Comtech EFData modems. When configured properly, the SDM-300A can be installed to communicate with or replace the following Comtech EFData modems:

  • SDM-100
  • SDM-308B
  • SDM-650B
  • SDM-300
  • SDM-309B
  • SDM-6000

All Comtech EFData redundancy switches (1:1 or M:N) can be used with the SDM-300A, making field replacement or upgrades of existing systems easy and cost effective.

COST EFFECTIVE

Comtech EFData's SDM-300A employs Fully Accessible System Topology (FAST). This technology provides a costeffective approach to upgrading satellite modem configurations. FAST is an exclusive, industry-first feature that eliminates the need to purchase options before they are needed.

An SDM-300A base modem includes the following features:

  • BPSK and QPSK
  • Viterbi or Sequential decoding
  • Single data rate
  • IF range from 50 to 180 MHz (1 Hz steps)

FEATURE ENHANCEMENTS

Enhancing the SDM-300A's performance is easy. Additional features are added quickly on site, using the FAST access code purchased from Comtech EFData. To enable these features, simply enter the code at the front panel.

Base unit enhancements include:

  • Changing from single rate to variable rate
  • Extending the data rate from 512 kbit/s to 5 Mbit/s
  • Viterbi and Sequential decoding
  • 8PSK
  • Reed-Solomon concatenated Codec
  • IDR / IBS / D&I / AUPC / ASYNC

BUILT-IN SELF TEST

Comtech EFData's unique built-in self test feature allows the SDM-300A to complete a bit error rate (BER) measurement without the use of expensive noise generators and BER test equipment. The built-in self test:

  • Provides fully functional modem testing with noise
  • Displays pass or fail results
  • Establishes modem confidence
  • Eliminates BER test equipment

When commanded to the self test mode through the front panel or remote port, the SDM-300A disables the Tx and Rx IF ports and internally tests modulator, demodulator, and interface functions by means of a BER measurement. The BER measurement is achieved via an internal IF noise generator and BER test equipment built into the SDM-300A.