But probing the ADC clock didn't impact the clock signal itself, only the ADC input signal. How does that happen? FWIW: the clock signal starts at one side of t

But probing the ADC clock didn't impact the clock signal itself, only the ADC input signal. How does that happen? FWIW: the clock signal starts at one side of that large PCB and travels to all 4 ADCs, so it must have a serious driver on it.