FFT processing differences

Ground Control Software
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1

Yesterday I made a feeble attempt to help another user with his notch tuning. The files and my bumbling can be seen here:

I processed the same log file on two different computers, and got very different results.

Mission Planner on Windows:

Screenshot (60)
Screenshot (60)1076×461 11.3 KB

Mission Planner on Ubuntu Budgie

Screenshot from 2022-02-01 23:27:02
Screenshot from 2022-02-01 23:27:02849×349 26.3 KB

MavProxy on Ubuntu Budgie

Screenshot from 2022-02-02 18:20:54
Screenshot from 2022-02-02 18:20:54640×517 29.2 KB

The amplitude on all three are different, and the Hz of the first peak is different (Although Mavproxy and MP on windows are similar enough for setting filters).

Both installations of Mission Planner are 1.3.76 Build 1.3.8063.11439. I’m not sure how to find the version of MavExplorer that was used but I have done the beta update to MavProxy in the last week or so. If it’s important tell me how to find the version number and I’ll gladly get it for you.

Why would the same version MP give such different results?

2

Hi @Allister

I am interested in the real reason as well.
I could make some estimated guesses of possible reasons (like the number definitions per platform).

Most of the basic functionality is available on a emulated platform however in case of using the advanced features here and there short comings will be visible.

All I can say after experimenting with different GCS software’s on various platforms (Win, Linux (ARM and x86), Android etc).
Nothing beats a native application.

3

That’s fair regarding Mission Planner in Linux. But what about Mavproxy in Linux?

4

Hi @Allister

still works flawless for me. That’s what our developers use.
So it should be good enough for me too. :wink:

5

It’s been fine for me, except for the FFT values.