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MD–171 Disciplined Oscillator Module
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The MD–171 is a Extended Holdover GNSS disciplined module. It is a fully integrated GNSS disciplined oscillator module in a compact surface mount 40 x 50mm footprint. The module has an embedded 34 channel receiver that is both GPS and GLONASS compatible and provides a sinewave or CMOS 10MHz, and HCMOS 1pps output. An onboard precision OCXO provides stabilities in the unlocked mode enabling extremely low holdover. The module operates from −40°C to +85°C.


  • Embedded GNSS Receiver – GPS and Glonass Compatible
  • Embedded precision OCXO
  • 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 8 hours
  • Evaluation kit with software available

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