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scope probe calibration

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scope probe calibration

Postby Eastern » Thu Nov 04, 2004 5:32 pm

Just got my 3206 scope with a pair of 250MHz probes from Pico.

I noticed that both new probes had poor high frequency calibration and attempted to recalibrate them using 1 KHz from the built in signal generator. I tried turning both pots on each probe and I did not observe any change in the LPF (roll-off) on the scope trace of both probes. They were set on 10x. (I have no way of knowing which pot is for the series RC and which is for the parallel, but in either case I should see something change on the screen).

I had no problem calibrating my 500 MHz LeCroy scope probe using the 3206 scope and 1K signal source. So my technique can't be wrong (or could it).
Thanks
Eastern
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Postby markspencer » Fri Nov 05, 2004 10:50 am

Hi,

I am sorry to hear that you are experiencing this problem.

Once setting the PS3206 up with the 1kHz Square trace. The probe normally gets adjusted by the adjustment screw located on the probe handle first. The adjustment resistors very rarely need to be adjusted.

I would advise that you try it again with the one on the probe hand and lewt me know if you are still unable to get a correctly formed wave.

Best regards,
Regards,

Mark Spencer
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