Mysterious noise with MATLAB

mattgwilson · Post by **mattgwilson** » Wed Apr 28, 2021 10:06 pm

Hello,

I'm working on implementing MATLAB code to record from a PicoScope 544A and am having trouble with a huge noise signal. Everything works fine using the PicoScope6 software, but noise is added when I do the same thing (as far as I can tell) in MATLAB.

I'm curious if anyone has ideas on where this might be coming from, since it seems to be a software issue.

My current method for testing is to output a signal and trigger from an external waveform generator straight into the PicoScope (270 kHz burst, 50ms duration, 100mVpp amplitude). With the same sampling rate, ADC conversion of 16 bits, and duration, the matlab signal still is shifted up and has higher frequency noise added.

Any thoughts would be greatly appreciated!

Matt