AnsweredAssumed Answered

Why voltages decreased when sampling rate increased

Question asked by lixiaozhou222 on Dec 22, 2011
Latest reply on Dec 27, 2011 by bret
Hi,guys,I found a strange thing, I have DSO 90254A(2.5GHZ,20GHZ). When I switched the sampling rate from 10GHZ to 20GHZ, the voltages range on the screen suddenly decreased largely to smaller ones(the scale per div was the same), I don't why, that's really strange, does that means 20GHZ sampling rate is  unreliable? Please just tell me why, thank you!