Acc0(x,y,z) and gyr0(x,y,z) values are negative in the FFT log

ArduCopter
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1

While I was preparing my octacopter for the first flight, I lifted a small amount by rope from 4 sides. The values I saw in the log record made me think. How can FFT values be negative and what should I do? Thank you to those who helped.
Note: The bin file is shared as an attachment.

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Bin file;
https://drive.google.com/file/d/1-FGho-GjC2rbAzZOWeFN9dpofJn_bWdi/view?usp=sharing

2

That is normal, the Y axis is logarithmic.

This has already been answered in two other forum threads. Use the search function

3

I would suggest that the default be Linear and instead of a checkbox labelled “Magnitude” it’s either labelled “Log scale” or a pull down menu :slight_smile:

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