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Rubidium Frequency Std.
FS725 — 10 MHz Rb frequency standard
FS725 ... from  $3195
Rb Frequency Standard
FS725 — 10 MHz Rb standard
FS725 ... from  $3195
FS725 ... from  $3195
 
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BUY / QUOTE
  • 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
  • 1 pps input and output
  • RS-232 computer interface
  • 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
  • 1 pps input and output
  • RS-232 computer interface
  • 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
  • 1 pps input and output
  • RS-232 computer interface
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FS725 Rubidium Frequency Standard

Overview
The FS725 integrates a rubidium oscillator (SRS 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 × 10-9 and a demonstrated rubidium oscillator MTBF of over 200,000 hours. The FS725 is an ideal instrument for calibration and R&D laboratories, or any application requiring a precision frequency standard.
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FS725 Rubidium Frequency Standard

Front Panel

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FS725 Rubidium Frequency Standard

FS725 10 MHz Rb Frequency Standard

FS725 Rb Frequency Std.

The FS725 integrates a rubidium oscillator (SRS 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 × 10-9 and a demonstrated rubidium oscillator MTBF of over 200,000 hours. The FS725 is an ideal instrument for calibration and R&D laboratories, or any application requiring a precision frequency standard.

There are two 10 MHz and one 5 MHz outputs with exceptionally low phase noise of (-130 dBc/Hz at 10 Hz offset) and one second Allan Variance of (<2 × 10-11). The FS725 can be phase-locked to an external 1 pps reference (like GPS) providing Stratum 1 performance. A 1 pps output is also provided that has less than 1 ns of jitter, and may be set with 1 ns resolution.

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FS725 Single Sideband Phase Noise

FS725

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.

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

There are two alarm relays that indicate the status of the rubidium oscillator lock state and synchronization to an external 1 pps input. The relays are SPDT, providing both normally-open and normally-closed contacts.