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Electronics => Beginners => Topic started by: Aeternam on June 22, 2016, 08:54:51 am

Title: How to measure attenuation on a digital scope
Post by: Aeternam on June 22, 2016, 08:54:51 am

Hey gang,

Quick question: how do you measure the attenuation, in %, of two signals on a digital scope? See attached image: I'd like it to tell me that channel 1 is attenuated blah % in regard to channel 4.

Any ideas? (Yes I tried to RTFM but it's not all that clear, at least to me  :-DD )

Title: Re: How to measure attenuation on a digital scope
Post by: Rerouter on June 22, 2016, 09:07:10 am

as the 2 signals are in phase, see if it has a math function, A pk2pk - B pk2pk / Apk2pk (peak to peak)

Title: Re: How to measure attenuation on a digital scope
Post by: Mechatrommer on June 22, 2016, 12:08:45 pm

since your reference is CH4, so CH4 is the divisor...
((2.5 - 2) / 2.5) * 100 = 20% attenuated.

Title: Re: How to measure attenuation on a digital scope
Post by: Aeternam on June 25, 2016, 10:53:10 am

Quote from: Mechatrommer on June 22, 2016, 12:08:45 pm

since your reference is CH4, so CH4 is the divisor...
((2.5 - 2) / 2.5) * 100 = 20% attenuated.

Of course. I should have been able to figure this out by myself. :-[ Thanks! :)

Also I found that my scope has a built in function to do this, it's called "Ratio Y".