Hi Hal,
On 2022-01-07 21:40, Hal Murray wrote:
The two biggest outside influences on the PICDIV are supply voltage and
temperature.
Another interesting influence is the number of outputs that are switching and
the load on them. In particular, if you have several outputs running at
different frequencies, the clock-out delay should be slightly longer when 2
outputs switch when compared to when only one is switching.
Has anybody measured that on a PIC? (or similar chip)
I think one of tvb's picDEVs has several outputs.
I have measured it on the TADD-2. It's not so quiet as I could wish, but
there is good usage for the TADD-2s.
It's very clearly noise from other outputs.
So, one needs to check how quiet it has to be. Using a single-frequency
output setup can be expected to be much more quiet. For some counter
setups, the PICDIV is better than the counter anyway.
Cheers,
Magnus
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