>
>Someone said awhile ago on the list that the quick and dirt way to check
>for overdrive is to place your scope on the Crystal drive line (this is the
>output of the inverter) and look at the waveform.  If you see a nice clean
>sine wave it is fine.  If there is clipping at the tops of the waves, the
>crystal is overdriven.
>
>Erik Reikes
>

I searched thru the Mchp site and found the clipping method mentioned in
another publication, FACT001.PDF  BASIC PIC16/17 OSCILLATOR DESIGN GUIDE.
[great doc numbering system - FACT001]. And your memory is good, it does
say the OSC out pin. Looks like a simpler way to go than using network
analyzers and current probes, as mentioned in AN588.

Sounds like the great census of 4 (Bill, Erik, Tom, me) has not seen
any problems with leaving Rseries out. Since I was doing a new layout
on one of my pcbs, I thought it might be a useful thing to check on.
Guess I might stick the ole scope on a few of my systems for good
measure anyway.

- Dan Michaels
Oricom Technologies
http://www.sni.net/~oricom
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