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[filmscanners] Re: Power Line Filter



le 30/03/02 10:41, Anthony Atkielski  anthony@atkielski.com a crit:

> Didier writes:
> 
>> make clean AC from a battery-based UPS
> 
> The AC from a UPS is consistent in average voltage and frequency, but it is
> not clean in the sense of not producing EMI.  On the contrary, the output
> wave can be pretty jaggy, with more harmonics than a pure sine wave.  The
> UPS is not designed to minimize EMI, it is designed to eliminate spikes and
> provide continous power.

 Hi Anthony

You're right, UPS is not designed to minimize EMI, but in fact it must cut
any interference coming with the AC input, as there is no more physical
connection with it. OK, the output wave is not pure sinusoid, but I don't
see any reason for it to spoil with creating new EMI.

But once more we got the same pb, but I'm also seeking the answer. May be a
good filtered plug is just the right one...
So, any user comment is still welcome.

Best regards
Didier

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