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MD–261 Disciplined Oscillator Module
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The MD–261 is a fully integrated GNSS disciplined oscillator module in a compact surface mount 25 x 20 mm package. The module has an embedded 34 channel receiver that is both GPS and GLONASS compatible. and provides an LVCMOS 10 MHz and 1 pps output. An onboard OCXO or High Precision TCXO is available dependent on performance requirements. The module operates from −40°C to +85°C, and is capable of providing a holdover of 1.5 µs over 2 hours over a ±2°C temperature window. An evaluation kit with operating software is available for development purposes.


  • Embedded GNSS Receiver – GPS and Glonass Compatible
  • Embedded OCXO or TCXO available
  • Field upgradeable for Galileo
  • 1pps LVCMOS output signal standard
  • 10MHz LVCMOS output standard
  • 1pps auxiliary input
  • Other output frequencies available
  • Modified NMEA (VSIP)
  • Holdover to 1.5 µs over 4 hours
  • Evaluation kit with software available

  • LTE
  • Digital Video Broadcast
  • E911 Location Systems
  • General Timing and Synchronization
  • Military Radio