STANFORD RESEARCH SYSTEMS FS725 REPAIR and STANFORD RESEARCH SYSTEMS FS725 CALIBRATION
 
Custom-Cal has a high success rate in the repair of the STANFORD RESEARCH SYSTEMS FS725. A calibration by Custom-Cal is performed by engineers with extensive OEM experience. We have the expertise and the necessary standards to perform the STANFORD RESEARCH SYSTEMS FS725 Calibration, onsite calibration may be available. We specialize in quick turnaround times and we can handle expedited deliveries upon request.

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   STANFORD RESEARCH SYSTEMS FS725   Description / Specification:    
STANFORD RESEARCH SYSTEMS FS725 Rubidium Frequency Standard

The Stanford Research Systems FS725 is a stand-alone 10 MHz frequency standard with an estimated 20-year aging of less than 0.005 ppm. The unit integrates an SRS PRS10 Rubidium Frequency Standard, a universal AC input power supply, and distribution amplifiers in a half-width 2U chassis (3.5" height). The unit's low aging eliminates the need for an external frequency reference in many applications; however units can phase-lock to an external 1 pps GPS signal for ageless performance or periodic calibration as required.
Specifications.

Standard outputs: Two 10 MHz sine waves, one 5 MHz sine wave, one 1 pps with 10 µs width.
1 pps output: 2.5 V into 50 Ω, 5 V into high impedance, 10 µs pulse width.
Sine outputs: 0.5 Vrms, ±10% (1.41 Vpp or +7 dBm).
Phase noise(5 MHz & 10 MHz):
  <-130 dBc/Hz @ 10 Hz,
  <-140 dBc/Hz @ 100 Hz,
  <-150 dBc/Hz @ 1 kHz,
  <-155 dBc/Hz @ 10 kHz.
Spurious: <-100 dBc (within 100 kHz).
Harmonics: <-60 dBc.
Return loss: >25 dB @ 10 MHz.
Accuracy: ±5 × 10-11.
Aging: <5 × 10-11 (monthly, after 1st month), <5 × 10-10 (yearly, after first year).
Allan variance:
  <2 × 10-11 (1 s),
  <1 × 10-11 (10 s),
  <2 × 10-12 (100 s).
Holdover: 72 hour Stratum 1 (1×10-11).
Frequency retrace: ±5 x10-11 (72 hrs off then 72 hrs on).
Settability: <5 × 10-12.
Trim range: ±2 × 10-9 (pot or by 0-5 VDC input), ±0.5 ppm (via RS-232).



 

Standard Calibration $720.00 *
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*This is a Web introductory price for one calibration of the STANFORD RESEARCH SYSTEMS FS725. Price does not in most cases include measurement performance data. Pricing does include NIST traceable calibration and issue of a calibration certificate and calibration label. Pricing may vary slightly due to volume and location of laboratory supporting calibration. Volume pricing may apply. On-site fees may apply depending on logistics, location and volume of work to be completed during the visit.


Related Bench Equipment Terms and Definitions. For a complete list go to our  Terms and Definitions Page.

Channel Bandwidth
Channel Bandwidth is the bandwidth over which power is measured. This is usually the bandwidth in which almost all of the power of a signal is contained.

Jitter
Jitter in technical terms is the deviation in or displacement of some aspect of the pulses in a high-frequency digital signal. Jitter is the time variation of a periodic signal in electronics and telecommunications, often in relation to a reference clock source. Jitter may be observed in characteristics such as the frequency of successive pulses, the signal amplitude, or phase of periodic signals. Jitter is a significant, and usually undesired, factor in the design of almost all communications links (e.g., USB, PCI-e, SATA, OC-48). In clock recovery applications it is called timing jitter.

Overshoot
Overshoot is the distortion that follows a major transition; the difference between the peak power point and the pulse-top amplitude computed as a percentage of the pulse-top amplitude.

Rise Time
Rise time refers to the time required for a signal to change from a specified low value to a specified high value, usually 10 and 90 percent of pulse-top amplitude (vertical display is linear power).

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