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Gday John
For "analysis" purposes, faster framerates are always better.
For creating a PEC "model", the limit depends more on your firmware.
PEMPro uses Fourier analysis to break down the raw data into fundamental frequencies and then reconstitutes it using the integer fundamentals only. The accuracy of the FFT analysis is only useable to what is called the Nyquist freq, which is effectively 1/2 your sampling frequency.
ie if you sample at 10 seconds, the best errors you can detect and model will be ones with a 20 second period or greater.
Sooo, if you know how long each PEC bin in your particular handbox takes to run, you would sample at a rate at least half of that time ( or faster )
A power mate may be helpful if you use a short focal length scope, but again, under normal conditions with good seeing, the lower the arcsec/pixel you can record at the better.
Andrew
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