Ivan,
I don't know if there is a significant difference between the 2 crystals
or not, but I suspect that either will work.
The crystal is only for the Real Time Clock. Put one crystal in and
keep tabs on the time display for a few days. If it is off drastically,
try the other crystal. If it off by only a little bit, try adjusting
C19 as indicated in the manual on page 12. The normal clock accuracy is
better than 2 seconds per day.
If you have an accurate frequency counter, the clock frequency should be
32768.0 Hz (measure at U3 pin 2).
73,
Don W3FPR
Ivin Flint wrote:
> I am confused on the X1 Crystal, cylindrical 32.768 crystal. I have two. One is labeled S573 and the other is labeled S793. I don't think there are supposed to be two and I am not familiar with these. I gues the 793 is closest to the 32.768 but some advice would be nice or am I overlooking something?
>
> Ivin
>
>
>
>
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