Frequency References

Frequency References

Novus offers a diverse set of frequency reference products. From our low cost TCXO frequency references to our Rubidium frequency references to our high-performance GPS disciplined references (GPS DO) -Novus frequency references offer low phase noise, accuracy and reliability. From one to twenty channels, modular, rackmount, portable or micro-packaged- Novus offers a form factor to meet your frequency reference needs. Available features include redundant power, SNMP, self-test, ultra-low phase noise, dual-Time base, real-time Allan Deviation, and synthesized frequency references.

For use cases that demand greater precision, we have GPS disciplined oscillators that will provide single satellite tracking capabilities that are GLONASS compatible and therefore supported by GPS, GLONASS, QZSS, and SBSS networks.

If you’re unsure which frequency reference you require, don’t hesitate to reach out. We are also able to manufacture custom units for unique applications.

Single Channel 10 MHz Self Calibrating Low Cost- NR3700-OG

Single Channel GPS/GNSS Locked 10 MHz Frequency Reference, OCXO and Self-Calibrating

Low Cost 10 MHz GNSS Locked Frequency Reference


The NR3700-OG frequency reference continuously monitors the correction coefficients being applied to the OCXO to compensate for aging and temperature stability. The coefficients are stored in non-volatile memory and in the event of GPS loss, are used to maintain the accuracy of the crystal – GNSS loss. A low cost alternative if NMEA and PPS are not needed.  A good choice for General Lab Use, Simulcast and Test Systems. Low noise option offers lower phase noise.

  • Low phase noise OCXO
  • GNSS lock indicator and built in self test
  • Hold-Over stability of 5 ppb/day, 50ppb/year
  • Self-Calibration minimizes frequency transition during GNSS lock to < 10ppb
  • Locked accuracy < 4E-11

See demo video on YOUTUBE (NR3620)

NR3620 PN

  • Operates from DC Power in three ranges +- (10 to 18, 18 to 36, 36 to 65) VDC or an AC Adapter
  • PPS and RS232 available as options
  • 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)




GNSS Locked Frequency References
AC Powered, DC Powered, Low Noise, Auto Calibration, NMEA, PPS, 10 MHz, GNSS Locked , Modular Chassis

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