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Re: RF cal club?

 

On Wed, 20 Dec 2023 at 16:55, Reginald Beardsley via <pulaskite=[email protected]> wrote:

Because that gets you a range of precision values all of which are precisely related. A log detector chip makes a great null sensor for a capacitance bridge.

Cal one of the set and they are all done. Cal that using a clean RF source, a precision resistor in a water bath, a thermometer and measurements at several frequencies to solve for the capacitance, stray inductance, etc.

Clearly trimming values adds to the time & ?cost, and personally I feel it would be better to spend the money on better quality capacitors.?

From my own perspective, I could measure capacitors most accurately if they were in a form of a PCB that would fit on a Keysight 16047A


I also have the 16047D, which looks identical, but has a different design which makes it suitable for higher frequencies, but at lower accuracy.

Both my 4284A and 4285A LCR meters have been calibrated by Keysight since I purchased them, but neither instrument has been calibrated for a few years.?

Dave.?
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