Yes, you're doing it right.
With the transformer between the AC mains and the LISN it is essentially
out of the "loop". The spectrum analyzer "looks" through the LISN at the
EUT's conducted emissions.
You see, there is quite a filter between the LISN and the AC mains, so
adding the transformer woun't make a lot of difference.
- Robert -
On Wed, 21 Oct 1998, Muriel Bittencourt de Liz wrote:
> Hello,
>
> I'm doing some tests of conducted emission using a LISN. My commercial
> voltage level is 220 V, 60Hz. But the product i'm testing is 110 V. So,
> i'm using a transformer before the LISN this way:
>
> Mains => Transformer(220/110) => LISN => EUT ( Equipment Under Test )
>
> My questions are:
>
> # am i doing right?
> # is it possible to use a transformer?
> # isn't the transformer acting like a "unintentional" filter?
>
> Any help will be welcome.
>
> Sincerely
>
> Muriel
>
> --
>
> ==================================================
>
> Muriel Bittencourt de Liz
> INEP - Instituto de Eletronica de Potencia
> Universidade Federal de Santa Catarina
> Caixa Postal - 5119
> 88.040-970 - Florianopolis - SC - BRASIL
> Phone: +55.48.331.9204 - Fax: +55.48.234.5422
> e-mail: [email protected]
> Homepage: http://www.inep.ufsc.br
>
> ==================================================
>
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