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


Three Channel 10MHz GNSS GPS Disciplined Oscillator, Self Calibrating- General Lab Use - Simulcast

Three Channel GNSS GPS Disciplined 10 MHz Frequency Reference, OCXO and Self-Calibrating with 1PPS and NMEA

Low Noise Multi-Channel Locked 10 MHz Frequency Reference


The NR3623 GNSS GPS disciplined 10 MHz frequency reference continuously monitors the frequency of the low noise OCXO and disciplines as required. The coefficients are stored in non-volatile memory and in the event of GNSS loss, are used to maintain the accuracy of the crystal. The unit also provides NMEA data and the 1PPS pulse. PPS amplitude can be either 3.3 or 5 Vdc CMOS (3.3 Volts is standard) with the capability of driving a 50 Ohm load. LED indicators provide GNSS GPS lock status, channel fault and self-test status. There is also a floating solid state relay that can be tied to an alarm panel with lock and self test status.  A good choice for General Lab Use, Simulcast and Test Systems. Low phase noise options.

  • Low phase noise OCXO
  • GNSS  GPS 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
  • 1PPS output
  • NMEA RS232

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
  • 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)

Brand : Novus          SKU :NR3623-OG



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

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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.