Comtech EF Data CDM-600 Open Network Variable Rate Satellite Modem

Comtech CDM-570A

Comtech EF Data CRS-300 1:10 Modem Redundancy Switch System

Comtech CDM-Qx

Comtech EF Data CDM-QX Multi-Channel Carrier-in-Carrier Satellite Modem

SKU
CDM-600-IF
Comtech EF Data CDM-600 Open Network Variable Rate Satellite Modem is available to buy in increments of 1

Open Network Modem with variable rate from 2.4 Kbps to 20 Mbps

CDM-600 Open Network Satcom Modem

The Comtech CDM-600 is a fully open network satellite modem, that's completely compliant with IESS-308, -309, -310, -314, and -315.  The 600 series modem provide variable data rate operation from 64 kbps through T2 and E2.

They are available in the following three data rate ranges:

• Low-Rate variable: 2.4 kbps to 5.0 Mbps

• Mid-Rate variable: 2.4 kbps to 10.0 Mbps

• High-Rate variable: 2.4 kbps to 20.0 Mbps

Comtech CDM-600 & CDM-600L Interface Diagram

Multi Interfaces

In addition, both modems operate in closed network from 2.4 kbps to 20 Mbps. The modems include T1, E1, T2, and E2 G.703 interfaces, in addition to EIA-422, V.35, EIA-232, and serial LVDS. HSSI is provided by adding the CIC-20 interface converter. The architecture is firmware and FPGA-based, and the internal Flash memory allows easy updating via the serial port. The modems offer exceptional flexibility and performance in 1RU enclosures.

CDM-600 Features

  • CDM-600: 50 to 90 or 100 to 180 MHz IF range
  • CDM-600L: 950 to 2000 MHz IF range
  • Fast acquisition demodulator (± 32 kHz acquisition range, 64 kbps, Rate 1/2 QPSK: 1 sec average)
  • BPSK, QPSK, OQPSK, 8PSK, 16-QAM modulation types
  • Patented 8-QAM for LDPC
  • Data rate range from 2.4 kbps to 20 Mbps
  • Forward Error Correction choices include Turbo Product Coding (IESS-315 compliant), Viterbi, Sequential, Reed-Solomon, LDPC and TCM
  • Intermediate Data Rate (IDR)
  • Intelsat Business Services
  • D&I++
  • ESC++
  • Automatic Uplink Power Control (AUPC)
  • Embedded Distant-end Monitor and Control (EDMAC)
  • Asymmetric loop timing
  • CDM-600: 50 or 75 ohm, front panel selectable
  • CDM-600L: transmit 50 ohm, receive 50 or 75 ohm, female Type N connector
  • Open network compatible and backwards compatible with the CDM-500/CDM-550, and CDM-550T
  • Interoperable with SDM-300A, SDM-300L3 (CDM-600L only)
  • 1:1 and 1:10 redundancy switch available

Comtech CDM-600L Carrier Level & Symbol Rate

Feature Enhancements

Enhancing the modem’s performance is easy. Additional features are added quickly on site, using FAST access codes purchased from Comtech EF Data. To enable these features, simply enter the code at the front panel.

Turbo Product Coding

The modems offer all traditional FEC methods and incorporate an optional Turbo Product Codec (TPC). TPC is a FEC technique that delivers significant performance improvement when compared to Viterbi with concatenated Reed-Solomon. TPC simultaneously offers increased coding gain, lower decoding delay and significant bandwidth savings.

Two TPC codecs are offered as hardware options

The Low-Rate TPC codec operates up to 5 Mbps with limited code rates.

The High-Rate TPC codec operates up to 20 Mbps, and offers a full range of code rates (5/16 through 7/8, and 0.95) with all modulation types from BPSK to 16-QAM

Special features of the modems are their ability to monitor and control the distant end of a satellite link using a Comtech EF Data proprietary overhead channel. This framed mode is called EDMAC. User data is framed and extra bits are added to pass control, status, and Automatic Uplink Power Control information. This process is completely transparent to the user. An RF transceiver (C-Band and Ku-Band) or Block Up Converter at the distant end of a satellite link may be controlled and monitored from the front panel of the modem using a low data rate FSK signal on the RX IF cable via the EDMAC channel.

CDM-600 Specifications L-Band IF-Band

Typical Users

  • • Enterprise
  • • Internet Service Providers
  • • Satellite Service Providers
  • • Offshore & Maritime
  • • Mobile Operators


Common Applications

  • • Mobile Backhaul
  • • Communications on-the-Move
  • • Disaster Recovery & Emergency Communications
  • • Enterprise
  • • Offshore & Maritime Communications
  • • Satellite News Gathering