I am reading The Art of Electronics, page 809 and 810, where they show this probe:
Which is a DIY probe, made out of a RG-178 coaxial cable, in series with a 953 ohms resistor.
I wonder why the 953 ohms resistor is needed, won't it reflect any signals entering the 50 ohm, instantaneous impedance, coaxial cable? Is it for limiting the current out of low frequency signals? Or is it just for creating a 20x probe (1k/50R = 20)? Then what's the benefit of a 20x probe and not 10x? For me it looks like a big inductor for high-frequency signals, and the book doesn't specify any special, low inductance, resistors to be used.