I have quoted your other post below to keep things together:
gbgb wrote:Exploring the MAT file created by saving a waveform, I can not make sense in what units the data is saved - I expected it to be Volts but this does not seem to be the case. please advise.
Having loaded a couple of test files, the range is set in Volts - if you have seen something different please send in your .mat files.
Tstart and Tinterval are defined in seconds.
One way to confirm this is to multiply Tinterval x (number of samples in a single waveform - 1) and this should give you the total time in a single waveform capture. E.g. with a 1 kHz sinewave and 500us/div timebase in PicoScope 6:
3.2e -7 x (15630 - 1) = 0.005 ms
I hope this helps.