Thank you all for the feedback on lower levels for
ESD. What an education! Without question, we certainly
need to consider lower-levels to minimize ESD
failures/issues in the field.
How about Surge? Is it overkill performing lower
levels? Should this only be considered for devices
with gas tube a
Hello Rocky,
It could very well be that most (if not all) floppy drives have been
certified and are labeled with an FCC ID (There probably haven't been any
improvements in floppy drives that would warrant a recent new design). Do
you see an FCC ID number on the product? TEAC's registration numb
Best use of a Stirling engine I have seen, was implemented by a friend
of mine in Germany about 15 years ago. He added a miniature Stirling
engine he had made (it could be held in one's hand) to his butane
powered barbecue grill. The heat of the grill drove the Stirling engine,
which in turn opera
Chris,
I've made, in small quantities, mains leads with distributed ferrites. I did
that to avoid the big clunky "wart" on the cable.
Derek N. Walton
Owner,
L. F. Research EMC Design and Test Facility
12790 Route 76,
Poplar Grove,
IL 61065
www.lfresearch.com
Dear Group,
The physics of air discharge (= the reason for the variatins, the effect of
humidity, speed of approach) is quite well explained in
D. Pommerenke, 'ESD: Transient Fields, Arc Simulation and Rise Time Limit' ,
Journal of Electrostatics 1995 36 (1995), pp. 31 - 54
David Pommerenke
Rocky,
While your message indicates that the FCC may not have a problem
with the 'assembled from tested components' concept, it does not
mean that the end-product will actually meet the limits.
Poor routing of internal cables, insufficient grounding, just to
mention a couple of items, can cause
On this topic of oil consumption and the oil producers being opposed to
Alternative energy sources, the following link gives a good break down
of oil consumption and usage.
http://www.eia.doe.gov/pub/oil_gas/petroleum/analysis_publications/oil_m
arket_basics/Full_contents.htm
A couple of interes
The prosecutions were for a little more than just CE + CE + CE. In the
first case heard the company pleaded guilty but their defence lawyer claimed
CE + CE = CE as mitigation. However, not all the sub assemblies were CE
marked! In the second case, the manufacturer didn't even bother to produce
Hello
Can anyone send me details of manufacturers or suppliers of the above?
Cheers
Chris Colgan
Compliance Engineer
TAG McLaren Audio Ltd
The Summit, Latham Road
Huntingdon, Cambs, PE29 6ZU
*Tel: +44 (0)1480 415 627
*Fax: +44 (0)1480 52159
* Mailto:chris.col...@tagmclaren.com
* http://www.tagm
Further to my earlier email.
The ESD test that we were undertaking was on a digital device. The
ESD was direct discharge and at the voltage level of failure, about 3
out or 10 discharges were failing. Since device operation was
dependent upon the data being received, it was considered that th
Hi - Quite a while ago, in the 80's I think
W.M King published some papers that demonstrated the
differences in the ESD waveforms in rise times as the
voltage increased. So an ESD pulse of 2kV would occupy
a wider spectral bandwidth than a 15kV pulse. Whats
important to realize, is that he perfor
Dear all,
Are you working with a MLB, if so how many layers and what is your stack
assignment? I think if you are looking for a rule of thumb on layout
density, you can end up literally barking up the wrong tree.
I believe the correct rule of thumb is not to let a critical trace/track
cross any
Dear Scott,
(1)
I have looked at quite a bit of literature that plots
Failure propatibility vs. Stress level in contact mode like testing
and have seen very few none-monotonic EUTs that show the none-monotonic
behavior over a larger voltage range.
(2)
In my five year test practise at
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