John.
You did not say what effect tweaking the rate for exactly 5 KHz had.
However...
I oppose "tweaking" ANY test if the tweak is needed to get a "passing"
result! A test done anywhere within permitted parameters may be exactly the
test your customer performs to see if your product meets its requirements.
One might make a good case that -- given a tolerance -- the test should be
done at several rates within that tolerance.
Regards,
Cortland RIchmond
GE Aviation
Opinions my own, not those of GE Aviation, GE, or any of its businesses.
----- Original Message -----
From: John J Radomski <mailto:jjradom...@ra.rockwell.com>
To: emc-p...@ieee.org
Sent: 1/12/2009 3:31:49 PM
Subject: EFT (61000-4-4)
Hello EMC experts,
A colleague of mine asked me the following question: since there is a
tolerance band of +/- 20% for the Repetition Rate of 5kHz (4 - 6kHz), is
tweaking the rate (for example to 4.4 or 5.5kHz RR) an acceptable practice?
I am of the opinion that the EFT test should be conducted at the nominal
(5kHz) repetition rate and any supporting test reports indicating different RR
frequencies than 5kHz, probably will not sit well with surveillance
authorities. I'm I correct? Please advise.
Your input will be greatly appreciated.
Best Regards,
John Radomski
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