Electronic – Small signal probe

If you're designing your own boards, add test points. Aside from that, soldering on short bits of wire is the best solution I've found so far. I find that the amount of time it takes to strip and solder a wire is far less than what I'd otherwise waste futzing with clips or trying to hold a probe just so while also keeping an eye on a scope.

Like you say, the required output imedance doesn't seem to be mentioned in the manual (or both of us can't read), but they say you can hook it up to a multimeter with a BNC-to-Banana adapter. I am not aware of any multimeter with a 50 Ohm input impedance, so I guess the porbe's output is a voltage buffer designed to drive a device with a high-Z input like a multimeter or a 1 MOhm scope input. (If this was not the case, you'd get readings that would be wrong by about a factor of 2.)

Also, the corner frequency of the probe is 100 kHz, which doesn't really require a defined 50 Ohm transmission line with termination.

So no, I don't know for sure - but yes, I think 1 MOhm with some pF in parallel is most likely the correct answer.