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The General Dynamics CM-400 Air Traffic Control (ATC) rackmount transmitter and receiver systems are the culmination of our commitment to concurrent engineering, flexible manufacturing and total quality management. The CM-400 systems are specifically designed to meet the dynamic mission requirements of air traffic control centers, commercial airports, military air stations, and range installations.

Quality, reliability, versatility 

Featuring our most advanced communications engineering, the CM-400 transmitters and receivers assure long-term cost savings, system interoperability and consistent, long-term performance. Additional significant CM-400 transmitter and receiver advantages include:

  • Integrated test and self-calibration
  • Form-fit-function replacement for the fielded AN/GRR/GRT radio series
  • Excellent conducted and radiated EMI immunity
  • High thermal efficiency for low component temperatures
  • Remote control, maintenance and diagnostic monitoring status via RS-232 data link (RMMS)
  • Standard 19" rackmount front panel size


Easy To Use

  • 10 receiver presets for multichannel configurations
  • Microprocessor controller
  • Excellent co-location performance with optional receiver filter
  • No transmitter cooling fan required

Highly Reliable

  • Calculated MTBF exceeds 18,000 additional hours
  • Up to 12W continuous transmitter operation
  • Field MTBF exceeds 100,000 hours
  • Self-testing
  • Self-calibrating
  • Six sigma quality


  • High thermal efficiency
  • Low life-cycle cost
  • Low module count
  • Low total parts count


  • AC/DC operation with automatic switchover
  • 25 kHz channel spacing




- AN / PRC 112G
- URC -200 (V2)
- Pathmaker
- Air Traffic Control System
     - CM 200
     - CM 300/350
     - CM 400