Nice soldering job - very tidy.
I suppose that the real test of this modification
would be how well two such systems track each other in
real-time.
Ceramic Resonators such as was originally mounted have
+/- 0.5% accuracy. Crystal accuracy is typically
+/-50ppm (100x better than the resonator), that means
a worst-case error between 2 crystal oscillators of
100ppm. If you were using these to run a clock that
equates to .36 seconds disagreement over an hour.
To hit the 1ms accuracy that Gary quoted earlier you'd
need to resynchronize such a system at least every 10
seconds minimum. So, while using a crystal doesn't
eliminate the synchronization problem, it
significantly reduces the effort required to do so and
still maintain reasonable accuracy.
Eric
--- djbrow54 <
davebr@...> wrote:
> Success! I had a tech at work take off the
> resonator. I added the
> capacitors (0302, I think) and a through-hole
> crystal. Man were those
> capacitors small! Rock solid performance! Photo
> "AtomPro28 crystal.
> jpg" is in the Files>BasicAtomPro>Original PSIM>Dave
> Brown folder.
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