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10 MHz Self Calibrating-TCXO Based

Category: References

10 MHz Frequency Reference, Self-Calibrating, Single Channel GNSS Locked, TCXO


The NR3700-CAL frequency reference continously monitors the correction coefficients being applied to the TCXO to compensate for aging and temperature stability. The coefficients are stored in non-volatile memory and in the event of GNSS loss, are used to maintain the accuracy of the crystal - GPS loss offset +- 10 ppb.  A high performance low cost GPSDO for software defined radios-

  • Low phase noise TCXO
  • GNSS lock indicator and built in self test
  • Hold-Over stability of +-1 ppm/year
  • Self-Calibration minimizes frequency transition during GNSS lock to < 10ppb
  • Locked accuracy < 4E-11
  • Low phase noise

See demo video on YOUTUBE (NR3620)



  • Operates from DC Power in three ranges +- (10 to 18, 18 to 36, 36 to 65) VDC or an AC Adapter
  • PPS Accuracy 20 ns rms (optional)
  • Indicators and signals provide GPS Lock and unity self-test status
  • Available in Kit Form (Includes reference, antenna, 50' cable, and power adapter)

GPSDO Kit available, wide input power range (-60 to +60 VDC)



Data Sheets

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