Math channel (average function) in MATLAB

elevenert · Post by **elevenert** » Fri Apr 05, 2019 4:10 pm

Hi,

I was wondering if you could explain how exactly the built-in function "average" works, i.e. the window size, time length etc.. Also, is it possible to implement it in MATLAB? I've tried but it didn't seem to work. I'm using Picoscope 5444D.

Here are some details about my Picoscope 6 settings and MATLAB commands.

Pico 6 :
Two channels (A=signal, B=trigger signal), 15 bits
Bandwidth limit=20MHz
Auto trigger on channel B (simple edge, falling edge, threshold=0V)
Math channel=average(A)
Sample interval=504ns, averaging time ~ 4s

MATLAB:

Code: Select all

[status.SetBandwidthFilter] = invoke(ps5000aDeviceObj, 'ps5000aSetBandwidthFilter', 0, 1);
 [status.setSimpleTrigger] = invoke(triggerGroupObj, 'setSimpleTrigger', 1, 0, 3);
 avg_A = movmean(chA,256,'Endpoints','discard');

numSamples=26218487
timeIntervalNanoseconds=504ns

Thanks in advance.

Post by **NeilH** » Tue Apr 09, 2019 7:00 am

Hi

The average function in the maths channels in PicoScope 6 averages multiple waveform captures together rather than doing any kind of averaging within a single waveform capture.

Neil

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Math channel (average function) in MATLAB

Math channel (average function) in MATLAB

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