Hi all – What wonderful responses. I understand that without the proper
processes in attention that the chances of
passing first time is low indeed. One could argue that the first time passers
have such a system in place and I was interested
in how much EMC has been integrated into the product
Not what you asked for, but a set of principles for success with third-party
testing, from a product safety point of view:
1. The design engineer and the product safety engineer should be able to
predict the outcome of any test.
2. Testing simply confirms (or
I concur with Pete. The key question is how much the development engineering
team is willing to take input from hardware compliance experts (both EMC and
safety). Does the team invite EMC & safety input early in the development from
concept to design (including design reviews), etc.?
“From much experience” I can only concur with Pete, Monrad and yourself –
safety, EMC & RoHS compliance must be explicitly built into the Product
Lifecycle structure and process. Failure to do that, and to then make sure that
that all WORKS is a route to “painful”, time-consuming and
We have found "pre-screening" EMC testing early in the development cycle to be
a good investment. EMC test results can be notoriously hard to predict, even
when using EMC-savvy design principles. Extra PCB board spins are cheap in the
context of a larger or time critical project.
I definitely agree with you on your points about experience. It seems the
highly experienced ones are those who are most successful on first pass EMC
testing. You can often tell who these people are on the design team by the
number of war stories they can tell. I sometimes think of this in
Charles, et al, You question is rather simplistic, in my opinion.
From my more than 25 years doing safety & regulatory consulting
with dozens and dozens of companies both large and small, I find that the
experience of the design team is the key to meeting the
Chas, et al, Yes, great responses; lot’s of experience out there.
To answer your recent expression of your question we need to
understand that the world is not static; people move around plus come and go.
Altho I get more that my share of ‘We
Hello EMC gurus!
Calling all labs - In your experience how many products pass the Unintentional
test first time? ?
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