I read in !emc-pstc that Peters, Michael <mpet...@analogic.com> wrote
(in <61c1e83d9da9d311a871009027d617f001632...@peaexch1.analogic.com>)
about 'LISN Calibration', on Thu, 29 Nov 2001:
>If you have not already done so, I would recommend an isolation transformer.
>Many factories and office buildings have a great deal of ambient noise that
>will interfere with your measurements.

That could be a bit problematic. The LISN was designed to work with
normal mains supplies, in which the neutral is earthed or earthy. You
may not get the same results with a floating supply.

My LISN has a mains filter on the incoming supply. CISPR16-1 mentions
that this may be necessary and, by implication, allows it.
-- 
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk 
After swimming across the Hellespont, I felt like a Hero. 

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