One method is to use two antennae. Then only the
difference is the emissions of your EUT as the second
antenna is farther away from the EUT. I believe that
Cassper, after DSP, subtracts one reading from the
other but I have seen a site using two spectrum
analyzers instead for each antenna.

--- Doug <[email protected]> wrote:
> 
> Perhaps it's because I've never understood ... 
> 
> How exactly does one do ambient cancellation at an
> OATS?


=====
Best Regards
Hans Mellberg
EMC Consultant

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