EMC and EMI probe testing

[Mr_EMC]

Hi Folks!

I need to make a EMI/EMC test (about 20-80kHz) and am wondering if some of you used near field probes like http://www.aaronia.com/products/antennas/near-field-probe-set-pbs2

Anything i have to know about?

 

[trobbins]

As you can see from their power output curves, you will get little output in the frequency range you indicate because the wavelength is so long. Are you sure you want kHz and not MHz? Sub 150kHz, most standardised emc testing is done with conducted tests, not radiated.

Ciao, Tim

 

[Mr_EMC]

Yes we have a switching power supply thats why i need the kHz range.
But i have seen that they also add this broadband preamplifier http://www.aaronia.com/products/spectrum-analyzers/RF-Broadband-Preamplifier-UBBV2/ so it should work fine even at very weak signals. I am just wondering if my spectrum analyzer will handle the frequency range

 

[trobbins]

Are you testing to some standard, or is this for investigatory work?

If this is for investigatory - then I can only re-recommend that conducted measurement setups are so much easier to utilise for the frequency range you are interested in (especially as they are the end benchmark that is used for compliance). An oscilloscope plus a good understanding of parasitic levels and pathways are the other key aspect of design, especially if you can simulate the equivalent circuit, and if the oscilloscope has fft spectrum analysis.

Ciao, Tim