finding at what time does 2 waveform cross each other

Hi,

In calculator we have a function named "cross" which gives the time at which the respective signal crosses a set value(constant).

if one of the waveform was constant, I would have taken the average value of it and compare the 1st waveform with these average value using cross function.

But what if both the waveforms are random ?

How can i know at what time does the 2 random waveform cross each other? is there any direct function which i can use?

Regards,

Jagdish

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