# Knock calibration

**URL:** <https://community.ecumaster.com/t/knock-calibration/3295>\
**Category:** EMU PRO\
**Created:** [March 4, 2025, 10:40am UTC](https://community.ecumaster.com/t/knock-calibration/3295 "2025-03-04T10:40:08Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![JeanD](https://avatars.discourse-cdn.com/v4/letter/j/9e8a1a/32.png) [@JeanD](https://community.ecumaster.com/u/JeanD)\
**Post date:** [March 4, 2025, 10:40am UTC](https://community.ecumaster.com/t/knock-calibration/3295/1 "2025-03-04T10:40:08Z")

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Hi,  
Could someone give me a basic explanation on how to set up knock calibration with EMU PRO ?

I fell in the mist …

For the frequency, I have used 1800/(pi x d )

But for the gain ???

What kind of signal level should I aim ???

I have searched for a raw signal input, but seems that it doesn’t exist ?

In fact I am using an original harness with 2 sensors in one connector, and I am unsure wich is N°1 and which is N°2, and I don’t see a way to be sure of that…

Please give me some light on that topic

Kind regards

P.S. excuse me for my poor english 😉