Rob,
It's probably not the LVDS signals themselves. I suspect your clock is
getting out by another route. Check your board layout for standards EMC good
practices. You'll probably find the clock has coupled to something else.
Regards,
Brian Epstein
ENT Consulting
br...@epstein.net
(805)
Rob,
I have a bit of experience with this type of thing in automobiles. LVDS is
definitely a great way to go. If the emission issues involve the FM radio then
the emission levels are quite low. With this I have seen issues with common
mode voltage (on an IC die) on camera boards causing CM
Evaluation Engineering had a cross reference to ISO standards.
http://www.evaluationengineering.com/archive/articles/1203emc.htm
The 2004 Annual Guide from Conformity Magazine had a similar cross
reference, but I am having trouble with their web link.
I don't know of a direct cross reference
A major difference between equipment used in a ground vehicle vs. that used in
a home or office is the presence of a metallic ground plane. That ground
plane dramatically changes rf emissions and susceptibility, and it can of
course act as an intentional current return path.
That said, there is
By chance is there a collection of pointers to tables that cross reference
national with international standards, e.g. SAE vs. IEC or MILSTD 810F vs. SAE
J-1455, etc?
EN 301 489-1
SAE cross ref?
61000-4-2
?SAE-J1113-13
2. Electrostatic Discharge Immunity Test
61000-4-3
?SAE
On Mon, 29 Jan 2007 14:52:40 -0500,
rk...@daimlerchrysler.com wrote:
The clock is operating at 33MHz; we have very NB spikes from 33MHz and on
at every harmonic
The lines are terminated 100 Ohm as per spec however; the screen
schematics have been reviewed and are sound but the
_
From: Bob Richards [mailto:b...@toprudder.com]
Sent: Monday, January 29, 2007 1:05 PM
To: ieee
Subject: RE: Military RS103 radiated susceptibility testing
Ed,
I've always called them Parallel rod E-field generators. Emco sells one:
http://www.ets-lindgren.com/page/?i=3107B
Ed,
I've always called them Parallel rod E-field generators. Emco sells one:
http://www.ets-lindgren.com/page/?i=3107B
http://www.ets-lindgren.com/page/?i=3107B Note that this one contains the
termination load internally, some similar products from other manufacturers
leave the termination
Rob,
We used low-voltage differential signalling (LVDS) interfaces to LCD
displays on a number of products that I helped develop at Lexmark in the
late '90's and early 00's. I don't remember the LVDS frequencies *ever*
showing up in Conducted or Radiated Emissions tests.
We did have problems
In message
609e6c541b96344484a45ed7b6275d7a04a6a...@ca-evs02.pelco.org, dated
Mon, 29 Jan 2007, Summers, Chet csumm...@pelco.com writes
are there any restrictions on using red indicator LEDs in electronic
products intended for export to China?
I don't know about China, but in Europe,
My apologies John
The clock is operating at 33MHz; we have very NB spikes from 33MHz and on at
every harmonic
The lines are terminated 100 Ohm as per spec however; the screen schematics
have been reviewed and are sound but the radio
Rob Kado
EMC Engineer - Module Laboratory
(I'm almost afraid to ask)
Ed, why exactly were you doing this? :-)
Bob Richards, NCT
Price, Ed ed.pr...@cubic.com wrote:
A while ago, I tried doing some brute force illumination of model rocket
igniter squibs with a 200 kW X-band pulse source. While you can make some
things happen, it isn't
Hello listmates,
are there any restrictions on using red indicator LEDs in electronic products
intended for export to China?
The former employer of a colleague apparently had some sort of restriction
placed on its OEMs, strictly forbidding the use of red LEDs anywhere on their
products.
In message
of92f83c5e.3f325ca3-on85257272.006a8444-85257272.006a8...@wkamerica.note
s.chrysler.com, dated Mon, 29 Jan 2007, rk...@daimlerchrysler.com
writes
Low Voltage Differential Signal.
Oops! 'Abbreviation memory not accessible! Re-boot at earlier stage in
life cycle.'
The whole
In message
e6acec5be8405b4e936c9e9bccac10241b6...@bb-corp-be1.corp.cubic.cub,
dated Mon, 29 Jan 2007, Price, Ed ed.pr...@cubic.com writes
Some military tests require illumination to begin as low as 10 kHz,
where a biconical is totally hopeless.
A main element 7.5 km long is certainly
I assume the reference is to Low Voltage Differential Signalling.
http://www.national.com/appinfo/lvds/0,1798,100,00.html
Ted Eckert
American Power Conversion Corporation
The items contained in this e-mail reflect the personal opinions of the
writer and are only provided for the assistance of
Low Voltage Differential Signal.
Rob Kado
EMC Product Development Engineer
DaimlerChrysler EMC Laboratory
CIMS 481-47-20
800 Chrysler Drive
Auburn Hills, MI 48326
Desk: (248) 576-6915
Mobile: (248) 467-0639
Fax: (248) 576-7045
John Woodgate j...@jmwa.demon.co.uk
Sent
In message
of86dc3d70.1ffad589-on85257272.0066abd8-85257272.0066c...@wkamerica.note
s.chrysler.com, dated Mon, 29 Jan 2007, rk...@daimlerchrysler.com
writes
Does anyone have experience utilizing LVDS for displays, screens,
etc.? We have serious Emission issues
What is an LVDS?
--
OOO
From: Ken Javor [mailto:ken.ja...@emccompliance.com]
Sent: Monday, January 29, 2007 6:59 AM
To: emc-p...@ieee.org
Subject: Re: Military RS103 radiated susceptibility testing
No published sources to recommend, but I offer the following observations:
SNIP
4) At 100 V/m, you are pushing a lot
Does anyone have experience utilizing LVDS for displays, screens, etc.?
We have serious Emission issues
Thank you for any advice.
Rob Kado
EMC Engineer - Module Laboratory Operations
DaimlerChrysler EMC Laboratory
CIMS 481-47-20
800 Chrysler Drive
Auburn Hills, MI 48326
Desk:
_
From: Haynes, Tim (SELEX) (UK Capability Green)
[mailto:tim.hay...@selex-sas.com]
Sent: Monday, January 29, 2007 1:04 AM
To: emc-p...@ieee.org
Subject: RE: Magnetic Defense Complex protects from Artificial Electromagn
etic Waves
Monday has always been a bit dull until now!
We
In message
74ff013b0701290719k6cb34412o25a1854da8218...@mail.gmail.com, dated
Mon, 29 Jan 2007, Jon Griver jgri...@601help.com writes
It is clear that such a device would have great difficulty complying
with EMC requirements, so clause 36 of IEC 60601-2-36, the particular
standard for
Paolo -
Not knowing what electroporation is and being curious, I did some internet
poking around. Electroporation is an in-vitro process that uses high
voltages. Wikipedia, for instance, mentions use of pulsed 2,400 V, when
working with bacteria. See
John,
You will be happy (or maybe not) to know that this approach is still alive and
kicking with regard to medical equipment. A lithotriptor is a medical device
used to break up kidney stones. Its method of operation is to produce shock
waves in water by what is basically a spark plug. It is
In message
e6acec5be8405b4e936c9e9bccac10241b6...@bb-corp-be1.corp.cubic.cub,
dated Mon, 29 Jan 2007, Price, Ed ed.pr...@cubic.com writes
The disc decoupling concept will work, but I have an intuitive
feeling that the disk will have to be quite large in diameter to be
effective down to the 20
Paolo,
If the Risk Management File and validation results show that the product
achieves its intended function with acceptably low risk levels, then I believe
that the regulatory authorities would accept the results. Of course there
would likely be some discussion of the issues and requests for
No published sources to recommend, but I offer the following observations:
1) Moving the antenna closer to get a higher field intensity says nothing
about near vs. far field. Moving the antenna closer will always increase
field intensity (until you get very close to the antenna elements).
In message
e6acec5be8405b4e936c9e9bccac10241b6...@bb-corp-be1.corp.cubic.cub,
dated Mon, 29 Jan 2007, Price, Ed ed.pr...@cubic.com writes
The disc decoupling concept will work, but I have an intuitive
feeling that the disk will have to be quite large in diameter to be
effective down to the 20
In message
fd5b080b52da9a41b44373344ac33aaa0b534...@segotn650.vcn.ds.volvo.net,
dated Mon, 29 Jan 2007, Gäfvert Joakim joakim.gafv...@volvo.com writes
Or perhaps a ball bearing with some conductive grease, I guess it has
to be conductive since an oil/grease film will ?isolate? otherwise.
I
In message 20070129134628.m27...@elen.it, dated Mon, 29 Jan 2007,
Paolo Peruzzi standa...@elen.it writes
Without any particular perscription, does it mean one can deliver
energy without limits, provided the system is in compliance with IEC
60601-1 and it's succesfully validated for the
From: Gäfvert Joakim [mailto:joakim.gafv...@volvo.com]
Sent: Monday, January 29, 2007 5:38 AM
To: emc-p...@ieee.org
Subject: Shield design by rotating axle
Hello
Thanks for all your responses.
John,
IEC 60601-1 third edition clearly states (clause 8.4.1) that the limits
specified do not apply to currents that are intended to flow throught
the body of the patient to produce a physiological effect during normal use.
Concerning IEC 60601-2-2, it looks like an elecroporation device
Hello
Thanks for all your responses.
I have followed this forum (passively) for a few years, and I am impressed by
it.
I will give all of your ideas a good thought.
(I shall also consider changing the mechanical design so to avoid this
problem).
I do like a idea of a disc bonded to the
Paolo,
I think that you will have to rely on the leakage current requirements of the
base standard, IEC 60601-1. The only particular standard which may have
relevance could be IEC 60601-2-2, PARTICULAR REQUIREMENTS FOR THE SAFETY OF
HIGH FREQUENCY SURGICAL EQUIPMENT. You would have to check out
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of John Woodgate
Sent: 29 January 2007 09:28
To: emc-p...@ieee.org
Subject: Re: Magnetic Defense Complex protects from Artificial Electromagn
etic Waves
95 GHz has a wavelength of 1/95 feet, about 1/8 inch, so each link could be
Dear all,
does anybody know which particular standard (if it exist) should apply to a
medical device intended to be used for electroporation?
I'm mainly interested in requirements concerning limits on delivered power
(voltage/current) and operation frequency contraints.
Regards,
Paolo Peruzzi
In message
201048ea81ba0745aca78e4cc8839001c8b...@desmdswms201.des.grplnk.net,
dated Mon, 29 Jan 2007, Haynes, Tim (SELEX) (UK Capability Green)
tim.hay...@selex-sas.com writes
Would a chain mail suit be proof against 95GHz or would the RF get
through the gaps between the links?
95 GHz has a
When undertaking a radiated susceptibility test to Mil Std RS103 using
a bicon (horizontal) I encountered some difficulty in achieving the
required 100V/m field at the low frequency range. A test procedure
advised moving the antenna up to 700mm to the left/right to improve the
field strength.
Monday has always been a bit dull until now!
We are not going to try out the skin cream - we like our engineers to LOOK
mature.
Rumour has it that EM waves can be used to degrade explosives (as they can
also cause explosives to explode).
Some say that this is why 22/7 in the UK failed when
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