How should I do if I want to get current noise power spectrum density (pA/sqrt(Hz))?

Hi engineers,
I want to test the noise level of the current source, and then see the noise distribution at frequency domain (0~100kHz).

I don't know how should I get the current noise data, because I try to use the Keithley 6482-Picoammeter to do a test, but its sample rate is too slow.

What I want to get is like attached figure shows.
 

Hi Nan,

This sounds like a question best handled in a ticket. I'd ask you to submit your question here so we can better support you: https://www.tek.com/en/support/contact-technical-support

Check out this application note pertaining to our 4200A-SCS and 1/f noise measurements:<br> <a href="https://www.tek.com/en/documents/application-note/flicker-noise-measurements-using-the-4200a-scs-parameter-analyzer">1/F Noise Measurement with 4200A-SCS</a>