I have acquired high frequency current probes up to 5 GHZ. The current probes have a 50 ohm SMA-type output. The probe has a hole through its center where a conducting wire will be placed for measurement. I also have a signal generator up to 20 GHZthat I'd like to use for test. However i am not sure what the best test setup is. I was thinking to just create a simple series resistor circuit on a breadboard with an AC input. Am i completely on the wtong track ? what is the best way to test the functionality/performance of the probes?

Just for an idea, the probes I have are similar to the following:


  • \$\begingroup\$ All you need to do is to create some current signal that you know how it looks like; if your funcgen+resistor setup can do that (I have no idea about the bandwidth of your resistor) then I see no problem. \$\endgroup\$
    – PlasmaHH
    Sep 25, 2015 at 7:26
  • \$\begingroup\$ How about a decent link to the actual probe and not a "something like this" link. \$\endgroup\$
    – Andy aka
    Sep 25, 2015 at 7:50
  • \$\begingroup\$ Decent link was not provided because it does not exist. They were special ordered for a custom application \$\endgroup\$ Sep 25, 2015 at 15:30
  • \$\begingroup\$ @PlasmaHH are there high bandwidth resistors available? \$\endgroup\$ Sep 25, 2015 at 15:52
  • \$\begingroup\$ @DeeTee: depending on what you mean by "high", yes there are \$\endgroup\$
    – PlasmaHH
    Sep 25, 2015 at 15:56

1 Answer 1


Regardless of the circuitry you use, the important factor is whether you can provide calibrated signals to the probe. For example, if you can provide a range of accurate current signals, over a range of accurate frequencies, then you know what you are providing as input. Then, you will be able to determine the probe's characteristics, over the range being tested.


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