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Ultra Low Noise Single Channel Rubidium GNSS Locked with Dual Time Base

Category: Rubidium

Single Channel Low Noise GNSS Locked Rubidium Frequency Reference with Dual Time Base


The phase noise for a standard Rubidium source is not acceptable for some applications and we offer a low noise Rubidium frequency reference that includes a low noise OCXO that is locked to the Rubidium source (NR2110-R/O). To further enhance long-term stability, GNSS locking of the Rubidium source is added. The stability of Rubidium, the low phase noise of an OCXO and the long-term stability of GNSS locking. The dual time base adds a second GNSS receiver that provides master timing for an embedded frequency counter to monitor the Rubidium reference. Measured performance is displayed locally or is acessisble over the Internet.


  • 26 Channel GNSS receiver
  • temperature stability <3E-10 0 to 50C
  • Warm-up time , 12 min
  • harmonics <25 dBc
  • excellent holdover stability in GPS denied environments
  • outputs are fault protected and monitored continously
  • built-in test circuitry throughout the design
  • power supplies and signal present are monitored
  • Stability  3E-12 @ 100 seconds
  • LCD status display
  • Ethernet status reporting
  • Dual-independent time base assures the integrity of the source
  • High Stability PPS avaiable  < 50 ps P-P see curve
  • PPS holdover stability options to less than 1 usec/day

Data Sheets

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