Interesting, I was just about to ask a very similar question. We use external test labs for full EMC chamber testing on our products. We do not have an anechoic chamber in house.
We do have a BB60C and Spike and it would be nice to be able to use it when trying to mitigate problem frequencies that were identified in the outside EMC test lab where we are not paying lots of money per hour.
Say we have an issue at 60 MHz for example. It would be nice to save a trace of the average of the environment in a narrow band around 60 MHz while the DUT of powered off. Then this “quiet” average trace can be set to be subtracted from the real time trace when the DUT is powered on to see how much the DUT is adding. Or another method would be to save an average sweep with the DUT powered on with no mitigations, then subtract that from the real time trace. This would make it really easy to see whether wiring mitigations / ferrites / etc. are helping or not.
Thanks,
-Randy
