PicoScope 7 Software
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MAT file export - time units
MAT file export - time units
When exporting to MAT files there are the variables - Tsart and Tinterval.
What units are they in?
What units are they in?
Re: MAT file export - time units
OK - I think I figured it out
Tstart and Tinterval - they seem to be in seconds. I used a hex editor to find the values and used a binary to double converter. Please confirm that my assumption is correct.
The Length parameter seems to be the number of samples - please confirm.
still have problem with the voltages which I posted separately.
Tstart and Tinterval - they seem to be in seconds. I used a hex editor to find the values and used a binary to double converter. Please confirm that my assumption is correct.
The Length parameter seems to be the number of samples - please confirm.
still have problem with the voltages which I posted separately.
-
Hitesh
Re: MAT file export - time units
Hi,
I have quoted your other post below to keep things together:
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.
I have quoted your other post below to keep things together:
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.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.
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.
Re: MAT file export - time units
Thanks you,
Will check again the voltage issue, since my impression was that the values read from the MAT file did not correspond with those displayed when I looked in PicoScope at the psdata file.
Will check again the voltage issue, since my impression was that the values read from the MAT file did not correspond with those displayed when I looked in PicoScope at the psdata file.