I am using a PIC16F876 with a 20 Mhz crystal. On one pin I am receiving a data stream of about 33 Khz,(from an RF
source) I unlayer the data stream and output two separate data signals. The Main data that is recovered appears to have
phase jitter.
        Interesting though, The data is stable when I first turn on the power to the receiver. After 10 - 20 minutes the data
starts to jitter, if I spray a little coolant on the micro controller the data is stable and the jitter is gone, until
it warms up again. I tried affecting the crystal and this does not appear to matter. If I touch the controller with a
soldering iron for a few seconds, the jitter gets so bad the data is unusable. I can still put my finger on the part, so
I have not over heated it.

        Any Ideas?

Gordon Varney

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