Posted for Dan Irish:
:-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-) Ed Price [email protected] Electromagnetic Compatibility Lab Cubic Defense Systems San Diego, CA. USA 619-505-2780 (Voice) 619-505-1502 (Fax) Military & Avionics EMC Services Is Our Specialty Shake-Bake-Shock - Metrology - Reliability Analysis :-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-) > -----Original Message----- > From: Dan Irish - Sun BOS Hardware [SMTP:[email protected]] > Sent: Thursday, August 26, 1999 11:16 AM > To: [email protected]; [email protected] > Subject: Re: 80/80 calculation rules for CISPR22/EN55022 > > Pierre, > > The standard form of the 80%/80% calculation is: > > mean + (k x Sn) <= L, > > It sounds like your customer is asking you to confirm: > > mean + (k x Sn) - L <= 0 > > Simply subtract the limit L from your calculation at each > frequency. Your results should be negative or 0 at > all frequencies to pass. > > Regards, > Dan > > > > From: Pierre Selva <[email protected]> > > To: "SAFETY-EMC (Adresse de messagerie)" > <INTERNET:[email protected]> > > Subject: 80/80 calculation rules for CISPR22/EN55022 > > Date: Thu, 26 Aug 1999 17:12:17 +0200 > > MIME-Version: 1.0 > > Content-Transfer-Encoding: 8bit > > X-MIME-Autoconverted: from quoted-printable to 8bit by ruebert.ieee.org > id > LAA14328 > > X-Resent-To: Multiple Recipients <[email protected]> > > X-Listname: emc-pstc > > X-Info: Help requests to [email protected] > > X-Info: [Un]Subscribe requests to [email protected] > > X-Moderator-Address: [email protected] > > > > > > Dear colleagues, > > > > My subject of interest is the statistical rule explain in chapter 9.2 of > > EN55022 (also called the 80/80). Reading the standard, I don't know on > which > value I have to apply the rule. > > In fact, I usually apply the rule on each suspect frequency (about 5 by > product) and I compare the calculated LEVEL to the Limit, in dBµV. > > > > One of my customer is asking me to make this calculation on the MARGIN. > For > each product, I have to take the worst margin, and I make the calculation > for > the x products I have. The calcul gives a result which has to be compare > to 0 > (zero). The resulting margin has to be less than 0. > > > > How do you perform this calculation ? > > On which value do you perform it (margin, level, azimuth, height of > antenna, > ...) ? > > What are your own experience with your products or your customer ? > > > > In advance, I thank you a lot for your answer, which, I'm sure, will be > of > great value (80/80 calculation, of course !!) > > > > Best regards, > > ================================================================ > > Pierre Selva > > Laboratory responsible EMC and Safety laboratory > > SMEE Actions Mesures Ph : 33 4 76 65 76 50 > > ZI des Blanchisseries Fx : 33 4 76 66 18 30 > > 38500 VOIRON - France e-mail : > [email protected] > > ================================================================ > > > > > > > > --------- > > This message is coming from the emc-pstc discussion list. > > To cancel your subscription, send mail to [email protected] > > with the single line: "unsubscribe emc-pstc" (without the > > quotes). For help, send mail to [email protected], > > [email protected], [email protected], or > > [email protected] (the list administrators). > > > > --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
