piclist 2002\08\12\081410a >
Thread: What Test Gear to measure xtal frequency to 1Hz
face BY : mikespam@whitewing.co.uk

Remember that by connecting anything to the xtal pins you will change
its frequency due to capacitance. If you're after the sort of accuracy
you mention, it will be very difficult to acheive it with any sort of
direct connection.
A MUCH MUCH better way to do it is to output a known frequency on a
PIC pin (perhaps in a special test/calibration mode), and measure
this. Most decent frequency counters ought to be able to do this to
the accuracy you require, but you should probably use one with a TXCO
or OCXO reference).

On Mon, 12 Aug 2002 18:12:05 +0800, you wrote:

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In reply to: <>
See also: www.piclist.com/techref/timers.htm?key=xtal
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Subject (change) What Test Gear to measure xtal frequency to 1Hz

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