10 MHz Frequency References – OCXO, TCXO and Rubidium Based. GNSS-Locking Provides Long-Term Stability

Novus offers a range of GNSS GPS disciplined oscillators and related reference products. While our most  popular frequency reference is 10MHz, many of our products are available at 50 and 100 MHz. Unique frequencies are available as well. Novus references can be OCXO , TCXO or Rubidium based. GNSS-locking enhances long-term stability.  Stability options are available that incorporate vibration and thermal isolation. Our reference products are available in 19 inch rack mount and modular, chassis.  Our miniature PicoPod series fits almost anywhere.  Novus reference distribution amplifiers offer minimal phase noise contribution and skewing.  Novus PPS sources can be synchronized to a 10 MHz reference to provide a complete timing solution.  Our PPS sources can be directly from a GPS PPS source or processed to improve jitter and statistical accuracy. For GNSS denied environments,  Novus offers a range synthesized 1PPS sources.   Our PPS distribution amplifiers offer sub 1 nsec skewing and transient and fault protection. For enhanced control and monitoring, SNMP and local control are available as options. Portable reference products offer excellent holdover stability to provide accuracy in GNSS denied environments.

Call Today – (816) 836-7446


Single Channel 10MHz Self Calibrating GNSS GPS Disciplined Oscillator TCXO Based- NR3700-TG

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

Low Cost TCXO Based 10MHz GNSS Locked Frequency Reference


The NR3700-TG GNSS GPS disciplined frequency reference continuously 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 – GNSS loss. A low cost alternative if NMEA and PPS are not needed.  For lower phase noise see the OCXO based NR3700-OG.

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

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
  • 1PPS Accuracy 20 ns rms
  • Indicators and signals provide GNSS GPS Lock and unit self-test status
  • Available in GPS DO Kit Form (Includes reference, active antenna, 50′ cable, and power adapter)

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


Brand : Novus          SKU :NR3700-TG



GNSS Locked Frequency References
AC Powered, DC Powered, Auto Calibration, 10 MHz, GNSS Locked , Modular Chassis, TCXO

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    GPS DO Kits are available that include antenna, cables and power supply. Several features can be customized at the factory – frequencies other than 10 MHz either from a unique crystal or with a built-in synthesizer that is GNSS-locked. Time stamping capability to 100ns resolution. To meet unique requirements, we have shipped product with output features requiring a custom amplitude, square wave output, high voltage and high current drive.