For those interested, go to:
http://www.ni.com/jobs
navigate through Experienced
then Engineering
then Other Engineering Opportunities
then select Compliance Engineer.
I'm no longer employed at NI and
have no remaining connection the
company except a swell plaque the
guys made for me
When confronted by confused designers, I explain the USB feature I call the
common-mode noise detector. USB detects a new device connection via a very
simple non-differential circuit, even though the communication is otherwise
differential.
This problem was made noticable by the insistance
Good point, but considering the standard (see below) DC power buses are often
found in industrial locations. I had some previous experience with a product
line that operated almost identically to that Derek mentioned, the device
main controller ran from 24 VDC or down to 9 VDC; whatever the
I would add a litle to Rick's insight from my experience.
You may find that Manufacturing appreciates the quality enhancements usually
obtained in the regulatory process (and other test methods such as stress
testing) and would understand the consequences of non-compliance.
Product designers
Doug - we posted within a half-hour it seems. ;)
Actually the designers I worked-with liked the idea that the chips they
bought were tested, at least in some way, against the same standard the
end-product faced. I guess I would regard it as better than nothing
information.
Granted, it can
I want to make sure everyone is aware of the tidbit of information Doug
offered on the GR-78 thread. Readers may want to reconsider capital
equipment purchases of related test equipment, and certainly the impact on
manufacturers of sustained product lines (typically industrial) over the next
I had rare occasions where a product would not pass certain immunity
requirements for CE Mark (often a difficult ESD problem) but did meet the
emission requirements of ICES/FCC or North America. If a product was delayed
by such problems the release could go forward (via flags and message
Mike et al,
See the exact wording of exempted devices, in particular item (3) as I've
copied for you below.
Amended: April 1, 2002, 15th Edition
15th Edition applied from: April 1, 2002
[...]
Article 3 (Scope of the Implementation)
These regulations shall apply to the ITE, defined in Article
And I would add that the energy can be considered as shown in another clause
of '1010. If your stored charge is below a certain combination of voltage
and charge, then the energy level - despite the voltage - isn't a hazard.
Eric Lifsey
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