>
> OK Chuckles, here's the datasheet (only 40kB)


That data sheet tells me that this crystal can be ordered for values of
loading capacitance from 10pF on up, or in series mode.  Dosen't tell me
what this exact part number is built for.


> I use 22pF on each side. The waveform looks OK on the
> scope - sinusoidal and symmetrical


Yeah, it would.  But you're probably only loading it with around 15pF or so.
The two caps you see are in series (C1*C2)/(C1+C2) and that is in parallel
with an unknown stray value that I estimated at about 4pF


> Was fixed 22pF reasonable to start with ?


If the crystal wants about 16pF, then yes, but the data sheet you sent
dosen't say.
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