Wideband HF Direction Finder


The GEW™ MRD600 is a high-speed, ultra-wideband direction finder designed for extremely fast and accurate spectrum monitoring and direction finding.


With its 30 MHz instantaneous bandwidth, the MRD600 directly samples the entire HF spectrum, resulting in an extremely high DF scan-speed of more than 15 GHz/s. This high capture-rate leads to a very high probability of detection of even the fastest frequency-agile and LPI signals.  With its large-aperture antenna arrays, excellent dynamic range and sophisticated signal-processing architecture, the MRD600 provides extremely accurate results even in dense signal environments.


The MRD600 can be used for stand-alone, single-operator spectrum surveillance solutions or as part of an integrated signals intelligence or spectrum monitoring system. When combined with GEWTM receiver and automatic signal-analysis sub-systems, the entire HF frequency band can be buffered and automatically processed for both tactical and strategic collection systems.

Key Features:

  • Large-aperture interferometric or Watson Watt DF Methods
  • Frequency range 300 kHz – 30 MHz
  • Bandwidth up to 30 MHz
  • Scanrate up to 15 GHz/s
  • Single Site Location (SSL) function
  • Super resolution (optional)


  • HF spectrum monitoring sites
  • Strategic COMINT collection systems
  • Fixed and semi-mobile deployments