Hi,
I am using the standard app quite some time and also build my own version some time ago. My version uses the API to do a EchoChirp. And I found that my amplifier was quite ok.
But resently I started to build V2 of my app (web interface, windows, linux compatible) which communicates with the bare metal via USB. There I found that the results where different in the low frequency range. So I started to figure out why that is. I did some measurements and came to the conclusion my new application is doing what it should. So the bump in the FR between 10 and 20 Hz is real, but it never showed in the QA-app and my old app (API).
So I did some measurements with my scope and noticed that the QA application chirp starts at around 26 Hz.
Am I right?
Why is that?
Can that be changed?
What does the standard app and API tell me about the range below 26 Hz?
Why is it shown when there is no data.
My app starts at 2 Hz clearly showing the output transformer saturation, which I wanted to now.
New app:
QA app
My old app using API
QA app scope measurement
My new app scope measurement
