Hello all,
Spread spectrum clocking has a *wonderful* effect on radiated emissions
especially DDR generated noise.
My question is: Given the high degree of integration in today's products:
Does anyone have concrete experiences of degraded WiFi performance as a result
of using SSC?
Best
Hello,
Given: A product that has a front panel and a main board. The front panel
(along with USB and other electronics) also includes
the WiFI circuitry and antenna connectors. The main board also integrates (on
board) a RF4CE radio for remote functionality.
Scenario: As the result of a cost
Just some basic observations. In order for a dithered clock to solve a
regulatory problem, the frequency shift must be greater than the measurement
bandwidth. In order for the dithered clock to solve an EMI problem, the
frequency shift must be larger than the potential victim¹s bandwidth.
In an
PSES network,
I am looking at do due-diligence assessment of 3rd party labs that we use for
EMC, Wireless, and product safety testing. There are the standard lab
certifications: IEC17025, A4LA, NVLAP, IECEE CB Scheme, etc. I get many 3rd
party reports from labs, that have the proper
The 2012 PSES Symposium had a session on the assessment of CABs and labs.
But the presenter was influenced by space aliens, so information could have
been compromised. Do not think that any of my PPT files made it to the
disc, but may be online.
Brian
-Original Message-
From:
Truth from the lab. When January 12, 2014 rolls around any product you place
on the market in the EU to which EN 61000-6-4 applies will have to have been
shown to meet the standard with amendment A1:2011. Now, you need to know what
the amendment changed. I don't know your product, nor do I
Thanks for the helpful replies so far. I should clarify in this case the
regulatory context is Korea – ENs are essentially equivalent to KNs.
Regards,
Lauren Crane
KLA-Tencor
From: msherma...@comcast.net [mailto:msherma...@comcast.net]
Sent: Friday, August 30, 2013 3:18 PM
To: Crane, Lauren
Cc:
We require an on-site audit of the lab. 3rd party accreditation bodies aren't
perfect. I've found cases where the documentation was in good shape,
indicating that the assessor understood ISO/IEC 17025, but the test setups were
wrong, indicating that either the assessor didn't understand the
Lauren,
According to EU Directives all products to be placed on the market must
comply with current regulations and applicable standards. There are 2 major
sides to your question: did the product change? Did the requirements change?
You must evaluate and access your product vs new/updated
In message
1356672946.2724071.1377891431090.javamail.r...@sz0110a.emeryville.ca.mai
l.comcast.net, dated Fri, 30 Aug 2013, msherma...@comcast.net writes:
Does anyone know of a chart or table or white paper that lists the
differences between various versions of EN EMC standards?
Not for
Lauren --
A similar thread is currently running on LinkedIn:
http://www.linkedin.com/groups/CISPR-22-24-compliance-update-2278131.S.269600494?view=gid=2278131type=memberitem=269600494trk=eml-anet_dig-b_nd-pst_ttle-cn
Here is my comment on that thread, but I look forward to the
In message fe37b7a5275ae24195833ce152b33e432e6ed...@dlee08.ent.ti.com,
dated Fri, 30 Aug 2013, Gartman, W. Richard rgart...@ti.com writes:
What I am looking for is, what beyond these certifications do you look
for in a lab to consider it acceptable?
I suspect that after seeing all the
Does anyone know of a chart or table or white paper that lists the differences
between various versions of EN EMC standards?
Specific example: what changed between 2006 and 2001 versions of EN 6000-6-2?
thanks,
Mike Sherman
Product Safety and Compliance Engineer
Graco Inc.
-
Dear Experts,
A test lab is suggesting that because EN61000-6-4:2007 will be superseded in
2014, all conforming products must be retested to the new standard, even if no
changes have occurred in the product.
Is this a fair claim?
Regards,
Lauren Crane
KLA-Tencor
-
In message
63e38a5b081437478c77651f3d56c64f57f4f...@orsmsx102.amr.corp.intel.com,
dated Fri, 30 Aug 2013, Pettit, Ghery ghery.pet...@intel.com writes:
I've found cases where the documentation was in good shape, indicating
that the assessor understood ISO/IEC 17025, but the test setups were
In message
617eb8c8634c9149aa66c853d7b8ac5322b70...@ch1prd0310mb392.namprd03.prod.o
utlook.com, dated Fri, 30 Aug 2013, Crane, Lauren
lauren.cr...@kla-tencor.com writes:
A test lab is suggesting that because EN61000-6-4:2007 will be
superseded in 2014, all conforming products must be retested
On Wed, 28 Aug 2013 15:44:35 +,
Ian White (SXS UK) ian.wh...@uk.spiraxsarco.com wrote:
If you have a control panel which has relays and various other control gear
on, all mounted on a Din rail type construction this all comes under the LVD
and EMC Directives.
If you then include a
Full disclosure, I used to work at a test lab, and I now work for a
government regulator that audits test labs.
In most cases, as Richard said, test labs, except for possibly your small
local labs have accreditations from multiple accreditation bodies, all
auditing to some variant of
Well, unfortunately it is too often that some labs just know how to pass an
audit, but when it comes to testing, they fall very short.
Far too many 'so called' good labs rely on instrumentation and simply do not
question results. This leads to bad measurements, even though the lab is
supposedly
19 matches
Mail list logo
