[Frequency Response Linearity]

13 hours ago, attila said:

For more accurate measurement a close compensation can be used, an initial close loop reference curve R1, see M1 is C1 relative to R1 (earlier saved C1 curve)

Thank yo very much, this is what I was looking for.

[Frequency Response Linearity]

Thank you for the reply!

The connection is done through the special board that I've made. It's ok. The difference betwen channels is explainable.

But I see on your screen the same curve that was exactly the subject of my question: why it has a form like this? Shouldn't it be flat? Or the level off this fluctuation is neglectable?

 

[Frequency Response Linearity]

Hi,

I'm trying to measure frequency response of an audio amp using AD2 and Audio Analyser Suite.

In order to check the equipment I've measured FR diectly connecting W1 to Scope 1 & Scope 2. the picture I've receive is as follows:

Looks like there's some slight non-linearity of the AD2 itself on frequencies above 3 KHz. Can it be so, or am I doing something wrong?

Also, measuring a square wave at the 20KHz shows some imperfections.

Is it the limitation of the scopes or the wavegen?

Thank you!

[Looking for Audio Anaylzer Suite]

Hi, in case you haven't found it yet: https://www.dropbox.com/sh/ecgo4oiw7u9o3e0/AADu20wAB4aP10wQsXyrwCpNa?dl=0

You can find link in the description to this video: