How to measure attenuation on a digital scope

[Aeternam]

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  )

[Rerouter]

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

[Mechatrommer]

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

[Aeternam]

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".