(Going theoretical here - and off the top of my head at that so please don't
just accept this argument. Corrections would be appreciated if applicable)
I am unsure if the critical property is the reflective surface or the
conductive properties (to prevent part of the field from making it
Dear group
I have a telecom unit that already passed all tests according to CS03, FCC
part 68 and NRT3. What are the chances to pass the Australian TS001 and
TS002 without modifying the unit?
Thanks
Dieter Baldamus
---
This message is from the IEEE
Alex,
What I have done in your situation is to treat the inner copper layers
of the card as Polution Degree 1 (sealed so as to exclude dust and
moisture), and calculate creepages and clearance from there. This
protects you just in case you have a small air pocket in the inner
layers. Some
I have heard of an OATS built over a fresh water ground plane, ( a pond /
lake?). I imagine a slight breeze would upset the characteristics of the site?
Michael Sundstrom
NOKIA
TCC Dallas / EMC
ofc: (972) 374-1462
cell: (817) 917-5021
amateur call: KB5UKT
-Original
I can't offer quantitative experience, but I can offer some theory that has
always made sense to me (and my results were usually quite repeatable at my
last job where we employed these practices):
While the measurement site itself probably has a defined ground plane for at
least most of the
Terry -
Part 11 of 21CFR is related to electronic reporting and
electronic signatures for submittals to the FDA; I don't
believe there's any certification program for Part 11,
just a process/procedure to follow. Refer to
http://www.fda.gov/ora/compliance_ref/part11/
for details.
Regards,
Distance through insulation is not defined for 1010-1 products. Min
insulation for x950 products is 0.4mm. Spacing, as determined from WV
measurements shall be maintained at edge and adjacent to through-holes.
Reference 60950:2k clause 2.10 for multilayer PWBs.
-Original Message-
From:
Mat,
you might try ETSI TR 102 273-4 Improvement on Radiated Methods of
measurement and evaluation of the corresponding measurement uncertainties.
Available from ETSI.
Best Regards,
Clifton Brick
-Original Message-
From: Aschenberg, Mat [mailto:matt.aschenb...@echostar.com]
Sent:
Hello,
For uncertainty take a look at Results of the CISPR/A Radiated Emission
Round Robin Test, P.A. Beeckman and J.J. Goedbloed IEEE 2001.
Summary of 15 sites - controlled EUT 4 dB vartiation, Un-controlled EUT up
to 9 dB variation.
Regards,
Ken Hall
-Original Message-
From:
Hi Group,
My products use an external double insulated power supply which supplies
SELV to the product. For an analogue modem there has to be a creepage and
clearance between the PSTN side and the other product electronic circuitry.
I normally allow for 2.5mm and I apply this rule to all 4 layers
We have noticed a change in our OATS characteristics depending upon the
dampness of the area. It is especially noticeable this time of year when we
get a lot of rain in Florida. Does anyone else experience this phenomena?
More to your question Mat, the major contributors to the measurement
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