Hello John !
I've got an idea: i can measure the same amplitude with all available
channels (11) and then average the result - this would provide a
reasonably good smearing for gaps and spikes in my spectrum.

Does the PICO data logger have any analog buffers at the ADC inputs ?

Dear John ! My application will be a spectrum analyzer.
Regards, Ilya, 07.12

Dear colleagues !
What kind of ADCs do You have in the data logging devices:
Wilkinson / Flash / Successive Approximation / ... Do You apply
a sliding scale linearization techniques to the latter types ?
Thank You for the answer, I.T.