> I've got a project where we need to watch a pulse on another piece of > equipment. We do not want to load the circuit in the other piece of > equipment. Running a piece of coax to my equipment results in considerable > ringing, since the coax is not terminated. So, the question comes up, how > does a scope probe get away with a 1M load in the scope? I doubt that's > terminating the coax with its characteristic impedance. The idea of a 10X > probe with compensation is pretty clear... the trick is how do they deal > with the lack of termination? Lossy coax -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist