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this calibration 3.3 sgianl for Probe Compensation is normal ?

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ammjy:

--- Quote from: David Hess on December 12, 2019, 09:35:34 pm ---
--- Quote from: ammjy on December 12, 2019, 06:36:40 pm ---signal generator GK101 give always ringing.
--- End quote ---

General purpose signal generators will work for low frequency probe compensation however they also commonly have poor high frequency transient response.  Special "reference level pulse generators" are used for calibrating high frequency transient response.

--- End quote ---

Thanks for the good advice

David Hess:
Actually I should amend my statement as some signal generators have an awful lot of "tilt" on their square wave.  But good ones have very flat square waves.

One of the advantages of using a function generator for probe compensation is that a coaxial connection can be used to the probe tip yielding a very clean calibration signal.  Some old Tektronix oscilloscope used a BNC connector for the probe compensation output which was really nice.

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