Measurement indeterminations

[GiulioLaRovere]

Hi, I have problems on understanding the ANALOG DISCOVERY STUDIO instrument. I am analyzing a circuit that acts as a low pass filter. I am in the Waveform's Network Analyzer mode. I have set in 'magnitude': FALSE=relative to ref; UNITS=Vpeak (V). I am generating a 500 mV amplitude wave. I can't figure out the accuracy of the measurement on the voltage sent to the oscilloscope channels. Can you please help me? I found some specifications on the official website but I can't figure out what accuracy to use. Thank you.

[JColvin]

Hi @GiulioLaRovere,

The specifications for the Analog Discovery Studio, https://digilent.com/reference/test-and-measurement/analog-discovery-studio/specifications, have two different sets of specifications depending on if you are using the high gain or low gain settings (which is dependent on amplitude and scale that you are measuring). This is explained a bit more in this post here, https://forum.digilent.com/topic/23162-accuracy-of-ad2/, but the idea is that there is a DC offset expressed as ±X mV and a small amount of variance/"noise" associated with the signal itself expressed as ±Y %.

Let me know if you have any questions about this or if I misinterpreted your question.

Thanks,
JColvin

 

[attila]

Hi @GiulioLaRovere

See the following:
https://digilent.com/reference/test-and-measurement/analog-discovery-2/hardware-design-guide#awg_spectral_characteristics

[GiulioLaRovere]

Thank you @JColvin, @attila for the explanations and useful links. I now understand how to get the data I needed.
Giulio La Rovere