A technique commonly used and I believe may have been investigated by British Telecom is to use a piece of plastic tubing (garden hose) to couple the acoustic level to a point removed from the field. Keeps the microphone out of the field and avoids perturbing the field at the EUT. The system ca
I read in !emc-pstc that HALL,KEN (HP-Roseville,ex1)
wrote (in <6bd67ffb937fd411a04f00d0b74fe878026ee...@xrose06.rose.hp.com>
) about 'Immunity testing of Headset', on Fri, 24 Aug 2001:
>While at the C63 meeting one of the attendees asked how we measure the
>acoustic noise from speakers when test
Hello all,
Very interesting questions.
While at the C63 meeting one of the attendees asked how we measure the
acoustic noise from speakers when testing radiated and conducted Immunity.
We do not test PC's with speakers so no requirement. Telephone Terminal
Equipment has a similar requirement.
W
I read in !emc-pstc that duncan.ho...@snellwilcox.com wrote (in
<2401031...@snellwilcox.com>) about 'EN60601 vs EN60950 and EN60065', on
Fri, 24 Aug 2001:
>We are looking at a power supply to use in a product which will have two
>derivatives, one for professional broadcast use (tested to EN60
Hi Stuart,
Sounds like your referring to a PCMCIA radio card that can be integrated
into a host device. If so, you probably have an RTTE project that does also
include the LVD. The test suite for this device would depend on the
frequency band. If its 2.4 GHz equipment, then EN 300 328(Radio Spec
Group,
We are looking at a power supply to use in a product which will have two
derivatives, one for professional broadcast use (tested to EN60950 for Europe
and UL1419 in the US.) and one for Domestic use (EN60065 and UL6500).
Traditionally we have used power supplies approved to EN60950 and
Bill and Gary,
One way not to have a water resistant cable is to limit the voltage levels
to Class 2 (power limited) "wet" levels. By doing this, an installer will
not have to use specialized expensive wiring and special environment rated
conduit fittings.
PETER S. MERGUERIAN
Technical Director
Gary,
Anything outside (which includes the interior of the conduit)
must be rated for wet locations. It therefore must have a 'W' in the name
THW, THWN etc. Most 'THHN' is dual rated as THWN too.
See ('99 NEC) Art 310-8(c)
Look in Table 310-13 to see the Applications for the different wiring t
Hello Stuart,
EN 60950 will provide a good start (and keep you quite busy for a while).
Regards, Art Michael
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Does anybody have a clue what type of wire I can run in conduit for
outside environments. Internally, I have to worry about riser cables and
cables in air plenums etc, but how about if I am running through conduit
from the base of a power pole to ITE equipment located at the top of the
pol
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