EEVblog #457 – Oscillator Calibration Followup

A follow-up on another method to calibration adjust the Agilent 53131A frequency counter against the Stanford Research PRS10 rubidium standard.
The oscillator drift video is HERE

Forum Topic HERE

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  1. I suspet your ‘unders’ and ‘overs’ are back-to-front…
    If the internal clock in the DFM is OVER, then it normally causes the frequency displayed on the 7 segment display to be slighly LOW (and vice versa).
    When the internal osc in the DFM is too high, it slightly shortens the counting gate period making the display read a little less.
    When a trace on the scope is moving to the left (relative to the locked comparison trace), that trace has a HIGHER frequency (and thus shorter period)

  2. Frequency meter, has an input 10 MHz, better connect the output frequency standard, the counter inputs.
    I am at home I have a GPS receiver (Trimble Thunderbolt) display (that shows the status of the receiver) and four 10 MHz output.
    You can get STABILITY about 1×10-11, the more I would not count 🙂
    Cesium clocks gain of about 1×10-13, 1×10-15’s best
    The most accurate clock is made ​​in Poland pulsar clock 🙂 about 1×10-16 🙂
    Cool the frequency standard although a little big 🙂

  3. I’m not so techy about these things. But when I watch your video you make it sounds so simple. Great explanation, now I have ample knowledge about this.

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