EEVblog Electronics Community Forum
Products => Test Equipment => Topic started by: Scratch.HTF on March 16, 2018, 09:31:38 am
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I am looking at the PicoScope 3000 or 5000 which is within my price range, but unfortunately these series do not have an option for an external frequency reference and because of that, I am wondering if the timebase oscillator can be calibrated.
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I have 3000 and 4000 series PicoScopes and I don't know any official way to calibrate their timebase.
On the other hand, the higher bandwidth models (100MHz and up) of the 3000 series have an initial accuracy of +/-2ppm, that's not too bad as a starting point.
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I have 5000 200MHz 3 years old model but also do not know way for adjust clock but for me clock is accuracy enough. I feed 10 and 20 MHz from GPSDO to Pico and get 0.2561 Hz sigma on 10MHz (on 200000 samples) and 0.6274Hz on 20MHz. It is looks like ~0.03ppm on sigma! But sigma not all errors and I can see in "average" only 4 digs. FFT freq accuracy also looks good (about 1..2 bins)