Knock Sensor Benefits in Diagnosis

Dears,
I would like to know how to benefit Knock Sensor in my Diagnosis. Is there a way that I can benefit it? Any video on Knock sensor value change and what does high and low value indicate? what is normal range in diagnosis?

Any documents and any video can help?


Thank you.

I will move this into Diagnostic Tools and Techniques section.
To answer your question the short answer is a knock sensor won't tell you much.
A knock sensor is simply a piezo crystal micorophone that is tuned only to react to a quite narrow range of sound vibration frequencies usually between 8,000 and 17,000 hz.
The frequency is tuned to the sound of pre-ignition pinking or pinging in north America. The frequency of the pinking/pinging is different for each engine and largely depends on cylinder bore - big bore engines lower frequency, small bore engines higher frequency.