ADXL354 signal

I have recorded  these 2 signals coming from a shot. Acquisition parameters are the same; the board containing ADXL354 is fixed firmly to an externa box, in strong contact to  ground.

The differance between signals is great, i think my procedure has something wrong. I can post the box and the schematics. (mems axis shown is the axis perpendicular to ground)

Thanks, Enzo

[edited by: EnzoTernavasio at 10:01 AM (GMT -4) on 14 Sep 2020]
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