Waveforms app like configuration using SDK

[josu.jugo]

Hi all:

I have been using the WaveForms App for a signal acquisition application, defining a positive edge based trigger. The obtained signal FFT is quite stable.On the other hand, I am trying to repeat the same acquisition using the SDK, but the result is not so stable. I am wondering how to repeat the same configuration using the App and the SDK. Is any example available?

By the way, I am using an Analog Discovery Studio.

Thank you in advance

josu

 

Edited October 29, 2021 by josu.jugo

[attila]

Hi @josu.jugo

Beside the trigger level the selected filter, hysteresis and channel range (resolution) could influence the sensitivity.

FDwfAnalogInTriggerFilterSet(hdwf, filterAverage) default is decimate which looks for trigger at 100MHz sample rate, average only at specified frequency
FDwfAnalogInTriggerHysteresisSet(hdwf, 0.1)  level +/-hyst
FDwfAnalogInChannelRangeSet(hdwf, idx, 5.0) select 5Vpk2pk range (<=5.0) or 50V (>5.0)

You could also use pulse, slope trigger and holdoff options.

[josu.jugo]

Thanks @attila. I'am going to check those configuration options and report my final results

 

[josu.jugo]

Finally, I have found the problem. I am able to repeat the results of the App using python. Just a configuration error. When I want to select a second analog waveform using FDwfAnalogOutNodeEnableSet, I had selected an incorrect parameter: the carrier, not the AWG node.

Thanks for the help