PicoScope Matlab problems with high frequencys

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SG95
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PicoScope Matlab problems with high frequencys

Post by SG95 » Tue Nov 26, 2019 10:27 am

hello

I am a student currently using the picoscope3406 with matlab. I followed a tutorial on how to install everything succesfully. The matlab version i use is matlab R2019b. I am using the PS3000A_ID_Block_Example script to capture a signal provided with picotech-picosdk-ps3000a-matlab-instrument-driver-9c2a427. When i try this on higher frequencys i get a lot of deformation on the signal wich results in bad results for my fft(fast fourier transform). The signal i use to test is a sinus of 100KHz and a level of -10dbm(199.970 mVpp). Is there a way so that when you capture higher frequencys there is no deformation of the signal?
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NeilH
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Re: PicoScope Matlab problems with high frequencys

Post by NeilH » Tue Nov 26, 2019 11:01 am

Hi

Are you using the example code as is or have you made modifications to it for your application?

Neil
Neil
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SG95
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Re: PicoScope Matlab problems with high frequencys

Post by SG95 » Tue Dec 03, 2019 9:00 am

Hi NeilH

I am using the example code as it is, whats extra is that i performed an fft on the signal.

NeilH
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Re: PicoScope Matlab problems with high frequencys

Post by NeilH » Wed Dec 04, 2019 6:22 am

Have you changed the sampling frequency by changing the timebase?
What is the signal that you are trying to capture like?
Neil
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SG95
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Re: PicoScope Matlab problems with high frequencys

Post by SG95 » Tue Dec 10, 2019 1:32 pm

changing the sample frequency seems to help. Thanks for the help.

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