(Q1) Can an active differential probe such as this Agilent N2752A be used in a single-ended way, i.e., with one of its inputs at the GND of a circuit? Understanding of course, that we have (a) 1/10th the usual input impedance of single-ended probes and (b) that we are limited in our voltage swing to 10Vp-p? Any other 'gotchas' about doing this? The reasons why will be explained in the next question ...
(Q2) I've acquired a scope with a 6GHz bandwidth, and the inputs on the front of this scope have warnings: "All Inputs 50 Ohm, +/- 5V Max Cat I" I am wondering if I can use this scope as general purpose instrument. So in addition to the above-mentioned single-ended measurement, I'd like to extend the voltage range to 50V. Would this mean a 10:1 differential probe is required ( 50V --> 5V for compliance with the warnings on scope )? Would a 50-ohm active differential probe with a 10:1 attenuation translate my single-ended measurement of 50V --> 5V and match this scopes 50 Ohm input impedance?