On 01-Feb-02 Dans_PIC_Stuff wrote:
> How can I connect a scope to a resonator to measure it's actual frequency?
> I took a 16F84 with a 4MHz resonator to my Electronics AC circuits class and
> tried testing it on one of their scopes but it didn't look too prety and it
> made the PIC's program slow down dramatically.  Any tips?

Does your 'scope probe have a "x10" setting ?

If so try using that as it will have less of a effect on the oscillator circuit.
(Don't forget that the scope will display one tenth of the signal apmlitude).

Also it sounds that the oscillation is marginal if connecting a scope probe can
upset the clock speed of the PIC.  Are you using the recomended capacitors in
the circuit ?

Peter.

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads