From: Marco Denicolai
Date: Wed, 31 Oct 2001 14:58:21 +0200
Subject: Re: [TSSP] EMI measurements
Hi Finn,
For instance, the requirement for the modems I design at work (SHDSL,
SDSL, HDSL, etc.) is EN 55022 (for radiated emission). We use a Rohde
&Schwarz ENY22 ISN spectrum analyser, which I bet is pretty the same
than what you used. The limits are similar to the ones in your plot.
For a curve comparison, see
http://www.iki.fi/dncmrc/work/modem.jpg
This is a 8 x 2Mbps HDSL modem board, consuming 10W of DC power.
I mean, I don't see such a big difference in the quality of the
emissions, maybe some 10 dB more in the TC case. What about if you had
been measuring the TC without producing streamers? I guess then we would
see it in the radiated emission graph (but then it would be useless to
qualify you for being "museum compatible").
Do you think you could repeat the measurement with a lower voltage or a
bigger toroid (and no streamers)?
Best Regards
Finn Hammer wrote:
>
> Gang!
>
> I posted this info to the pupman list, but for some reason it did not
> seem interesting.
> However, I think that the first public measurements of a Tesla coil`s
> electromagnetic radiation just has _got_ to be interesting, so in the
> light of this lists longlasting quietness, I allow myself to break the
> silence and tell you:
>
> Cheers, Finn Hammer
--
_____________________________________________________________
Marco Denicolai Senior Design Engineer
Tellabs Oy tel: +358 9 4131 2769
DSL Products mobile: +358 50 353 9468
Sinikalliontie 7 fax: +358 9 4131 2410
02630 Espoo FINLAND email: marco.denicolai@tellabs.com
_____________________________________________________________
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.