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.

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Single Channel Low Cost 10 MHz OCXO Reference NR3700-O

Single Channel 10 to 100 MHz Frequency Reference, OCXO Based

10 to 100 MHz Reference operates from -60 to +60 Vdc in Three Ranges or an AC adapter


The NR3700 10MHz frequency reference uses a low noise SC cut OCXO as the master timing source. The unit is offered at up to 100 MHz. The OCXO is biased with a band-gap reference to provide excellent temperature and and aging stability.  LED indicator provides self-test status. There is also a floating solid state relay that can be tied to an alarm panel self test status.

The NR3700 contains an optional factory configurable frequency synthesizer that operates from sub-1 Hz to 10 MHz.  The output is available on the SMA as a CMOS signal at 5 Vdc or 3.3 Vdc  CMOS capable of driving a 50 ohm load. An excellent simulated 1PPS source. The synthesized signal is also available as a LVDS or RS422.


The unit also has a LVDS, RS422 option.

  • Low phase noise OCXO
  • Hold-Over stability of 5 ppb/day, 50ppb/year
  • Operates from DC Power in three ranges +- (10 to 18, 18 to 36, 36 to 65) VDC or an AC Adapter
  • Indicators and signals provide self-test status
  •  CMOS and/LVDS
  • Frequency synthesizer from sub-1 Hz to 10 MHz

Brand : Novus          SKU :NR3700-O




OCXO Frequency References
OCXO References
AC Powered, DC Powered, Low Noise, 10 MHz, 100 MHz, 50 MHz, OCXO

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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.