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Stanford FS725 Benchtop Rubidium Frequency Standard

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Stanford FS725 Benchtop Rubidium Frequency Standard

Stanford FS725 Benchtop Rubidium Frequency Standard

Ideal instrument for calibration and R&D laboratories

Stanford Research Systems

 

The FS725 benchtop rubidium frequency standard from Stanford Research Systems integrates a rubidium oscillator (Stanford model PRS10), a low noise universal AC power supply, and distribution amplifiers in a compact half-width 2U chassis. It provides stable and reliable performance, with an estimated 20 year aging of less than 5 x 10-9 and a demonstrated rubidium oscillator MTBF of over 200,000 hours.

 

Features:

  • 10 MHz and 5 MHz outputs
  • 20 year aging less than 0.005 ppm
  • Ultra low phase noise (<-130 dBc/Hz at 10 Hz)
  • Built-in distribution amplifiers (up to 22 ouputs)
  • 1pps input and output for GPS synchronisation
  • RS232 computer interface

There are two 10 MHz and 5 MHz outputs with exceptionally low phase noise of -130 dBc/Hz at 10Hz offset and low one second Allan Variance of <2 x 10-11. The 1 pps output has less than 1ns of jitter and may be set with 1ns resolution.

 

Up to three internal distribution modules can be added to the FS725. Each module has four 10 MHz outputs, one 5 MHz output and one 1 pps output, all with the same low phase noise, harmonic distortion and jitter.

 

In most cases the FS725 will be used as a stand-alone frequency standard due to its extremely low aging. However, it can also be phase-locked to an external 1pps reference (like GPS) for Stratum 1 performance.

 

An RS-232 interface allows direct communication with the rubidium oscillator. Using the provided Windows software you can easily monitor and control 1pps timing and determine the instrument's operational status.

 

There are two alarm relays that indicate the rubidium oscillator lock state and its synchronisation to an external 1pps input. The relays are SPDT providing both normally-open and normally-closed operation.

 

For further information please contact us or download the datasheet.

                                                     

       FS725 datasheet                                                    Read more on Stanford's website