Re: Which probe is better suited for 2465B?


Hi Giuseppe

For probing 50 ohm signals it's best to use a simple passive low resistance probe. This also works well for fast logic signals. This will outperform all standard probes. Links to a couple of designs here:

It's just a resistor, a length of 50 ohm co-ax and terminate your scope with 50 ohms. On a 2465B there's a switch for this. On lesser instruments you'll need a T and termination.

For high voltage you need a probe that is rated for that voltage.The P4100 looks suitable. Just take care around high voltages. If the high voltage comes from a low impedance source, such as a transformer direct from mains/line then it can kill you. I survived the experience but it hurt. A lot.


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