Re: Model of EMC Conducted Emission Test Reciever - Quasi peak measurements



Mark wrote:

Randomizing the frequency does not reduce the emissions, it just spreads them out so that you can pass the test. But it still creates nearly the same level of interference and to more frequencies. I know this has become a popular technique to pass EMI tests but I think it is a bad idea and just HIDES the problem.


The EMC standards are a hoop to jump through, not an objective quality standard. They say meet this curve: you meet this curve, you've passed. Don't start inventing extra obstacles, there are plenty of stupid, unnecessary ones already. RoHS/WEE anyone?


Paul Burke
.



Relevant Pages

  • Re: MC PHONO PREAMP
    ... During the recording process the RIAA curve attenuates the ... What this says is that on an amplitude basis the response starts rolling ... constant amplitude gets recorded on the disc between these two frequencies. ...
    (rec.audio.tubes)
  • Re: Bell shaped curves
    ... not all data forming a symmetrical bell shaped curve are normal. ... I wen to Google to search for other bell curves but found none. ... from 15 to 265 and their frequencies have a peak value ... Note, however, that there is the wonderful Central Limit Theorem, according to which sample means from _any_ continuous distribution, symmetric or not, tend to follow the Gaussian distribution as the sample size becomes large. ...
    (sci.math.num-analysis)
  • Bell shaped curves
    ... not all data forming a symmetrical bell shaped curve are normal. ... from 15 to 265 and their frequencies have a peak value ... for the total set ...
    (sci.math.num-analysis)