Hmm... 5 mA 3000V that's a small 15 Watts.
Ethernet coax uses a high voltage cap in parallel with multiple resistors.
- Robert -
-Original Message-
From: Jim Eichner
To: 'EMC-PSTC - forum'
Cc: Tom Unger
List-Post: emc-pstc@listser
horities announced their
> intent to impose EMC requirements on certain import commodities under
> the existing CCIB/CCEE safety requirements. Does any body know the
> status ?
>
> Thanks to all.
>
> Tom Cokenias
> Consultant, EMC and Radio Approvals
>
>
>
the newer non-harmonized standard necessary
means compliance with the older harmonized standard, if you can
demonstrate compliance with both editions of the standard, maybe
you can references older edition, newer edition or both editions
in your DoC.
Regards,
Tom
-
to
which conformity is declared. ...
Although non-harmonised standards will not give presumption of conformity,
I believe we can list any non-harmonised documents in the DoC.
Regards,
Tom
--
Tomonori Sato
URL: http://t-sato.in.coocan.jp
-
--
fixed
distance, then the permissible field strength limits shall be adjusted
using 1/d as an attenuation factor.
With the former method above, attenuation factor larger than -20 dB/decade
may be used if measurements at closer
careful - breakdown of the capacitor will have serious consequences.
Regards,
Tom
--
Tomonori Sato
URL: http://homepage3.nifty.com/tsato/
-
This message is from the IEEE Product Safety Engineering Society emc-pstc
discussion l
govt or
military.
best regards
Tom
T.N. Cokenias Consulting
P.O. Box 1086
El Granada CA 94018
tel 650 726 1263
fax 650 726 1252
mobile 650 302 0887
On Oct 12, 2010, at 1:52 PM, Christopher wrote:
Folks,
I am trying to understand what steps we need to take to certify a 4.5GHz radio
product
EMI
This might be of interest to the group, especially those involved
with EMC immunity testing of automotive parts.
best regards
Tom
http://www.interferencetechnology.com/markets/automotive/lead-news-
item/article/agencies-probe-link-between-gas-pedals-and-emi.html
-
This message is from the
n the market
> under his own name or trademark, and thus presenting himself as a
> manufacturer (footnote 78).
> ...
> (footnote 78) Those manufacturers are often referred to as 'own brand
> labellers' or 'private labellers'.&q
rs, and 2004/104/EC (and ECE
R10, CISPR 25, and OEM standards) are intended to protect on-board receivers.
Regards,
Tom
--
Tomonori Sato
URL: http://homepage3.nifty.com/tsato/
-
This message is from the IEEE Product Safety Eng
Tom
On Jan 4, 2013, at 8:55 AM, ravinder.ajm...@hgst.com wrote:
>
> Hello Experts,
>
> I am looking for a Gaussmeter to measure DC and AC magnetic fields up to 250
> kHz. I have tried searching on line but am unable to find one which covers
> such high frequency. I will appr
Hi Lauren
ELF and VLF emissions are a concern for SEM installations since the B field can
possible distort the electron beam
SEMI EMC calls it out
Best regards
Tom
Sent from my iPhone
On Feb 20, 2013, at 10:45 AM, "Crane, Lauren"
wrote:
> Is ‘ELF’ (as in ‘ELF EMI t
on
to earth, maybe we can expect that the the unit must not sensitive to
line-to-ground surge (actually, where the surge stress applied?) and
may omit line-to-ground surge test as described in the standard.
However, if we knew that the unit actually sensitive to line-to-ground
surge, is it really
Peter, these are in paragraph 15.247 of 47CFR15 (Part 15 of FCC Rules)
best regards
Tom
On May 22, 2013, at 11:40 PM, Peter Merguerian wrote:
>
>>
>> ISM-2.4
>> Freq. Range: 2400-2483.5 MHz
>> Bandwidth: 83.5 MHz
>> Max TPO PtM: 30 dBm (1 Watt)
>> Ma
Hi Asim,
As long as you supply the ferrites and installation instructions to the user,
it's been an acceptable practice with FCC for many years.
best regards
Tom Cokenias
T.N. Cokenias Consulting
P.O. Box 1086
El Granada CA 94018
tel 650 726 1263
fax 650 726 1252
cell 650 302 0887
On O
oss of 1.8.2007 (marked "**" above) stand for?
Regards,
Tom
Tomonori Sato
URL: http://homepage3.nifty.com/tsato/
-
This message is from the IEEE Product Safety Engineering Society
emc-pstc discussion list.Website: http://www.ieee-pses.org/
To post a message to the list, sen
requirements for Limited Current Circuit, and the voltage could be
thought as Hazardous Voltage.
I think that is why the discharge requirement which, under certain
condition, allow capacitor exceeding 0.1uF connected to the primary
circuit was specified.
Regards,
Tom
--
Topic: COST EFFECTIVE PCB DESIGN
Speaker:John Howard
When: Tuesday 12 February
5:30PM social, meeting at 7 PM
(Food and soft drinks provided)
Where: SGI (Silicon Graphics)
1600 Amphitheater Parkway
Building 40, Ozone Cafe
Mountain View, CA
Abstract an
Japanese-language version, hosted by Tom Sato ,
will continue at:
http://member.nifty.ne.jp/tsato/seec-faq
The textfiles will continue for some time to be available from my website
http://www.lyons.demon.co.uk as files seecfaq1.txt and seecfaq2.txt
BUT WILL NOT BE UPDATED
Martin Rowe, re
Reginald,
The criteria is in 47 CFR 2.948 (Part 2 of the FCC rules). The contact
person was/is Tom Phillips (OET office). I would recommend contacting him
before undertaking the task and checking out the FCC website for
information, specifically the OET office (Office of Engineering and
List-Post: emc-pstc@listserv.ieee.org
Date: May 14, 2002 (second Tuesday of the month)
Society Chapter: IEEE EMC Society
Subject: EMC REGULATIONS AND REGULATORS: WHAT'S NEW, WHO'S WHO
Speaker: Barbara Judge, Compliance Certification Services
Time: 5:30 Social, 7:00 Presentation
Place:
onse to
> these queries. Has anyone else has similar experience with them?
>
> Thanks,
>
> Tom Donnelly
> EMC Engineer
> Smiths Aerospace
> 973-428-9898 x445
> tdonne...@act-sys.com
>
> ---
> This message is from the IE
wound up tuning the LISN's to meet the curve with the filters
attached. Anyone else run into this problem?
Tom Donnelly
Smiths Aerospace Actuation Systems
973-428-9898 x445
tdonne...@act-sys.com
From: Bill Stumpf [mailto:bstu...@dlsemc.com]
Sent: Wednesday, May 05, 2004 2:50 PM
To:
Hi Grace
Which section you use, 15.247 or 15.249, will depend on the output power or
radiated field strength of the fundamental frequency.
Best regards
Tom
Sent from my iPhone
On Aug 24, 2011, at 11:35 AM, Grace Lin wrote:
Dear Members,
Do all regulatory
Hi Bob
See sec 2.1204 Import Conditions
They allow between 200and 2000 of each model depending on product type as
defined in this paragraph
Best regards
Tom
T.N. Cokenias Consulting
Sent from my iPhone
On Aug 10, 2011, at 9:56 AM, rehel...@mmm.com wrote:
Is there a limitation of
it?
I don't think it as a easy way, and I think it should be used
very carefully.
In most cases, I would suggest to redesign the product so that
it can pass the test.
Regards,
Tom
Tomonori Sato
URL: http://member.nifty.ne.jp/tsato/
This message is from the IEEE EMC Society Product Saf
> -Original Message-
> From: Sykes, William Thomas (Tom) [ mailto:wsy...@lucent.com]
> Sent: Monday, January 09, 2006 12:56 PM
> To: 'brian_ku...@leco.com'; emc-p...@ieee.org
> Subject: RE: Making Standards Free
>
> All:
>
> Please don
er supply units which are aleady
PS-E marked under the manufacturer's own responsibility.
Please also note that the power cord may also need to be PS-E marked
if it is of a detachable one.
Regards,
Tom
Tomonori Sato
URL: http://homepage3.nifty.com/tsato/
-
This message is from the IEEE
I do not find any exclusions for demos or shows listed in the EMC
directive. This analysis is my own of course.
Tom Whissel
Senior Compliance Engineer
Cabletron Systems, Inc.
trong ambients in the .150-30 MHz region, you
may need to take steps to shield your equipment and set-up.
Best regards
Tom Cokenias
Consultant, EMC & Radio Type Approvals
-
This message is coming from the emc-pstc discussion list.
To cancel your subscription, send mail to majord...@ieee.org
ores to
get required
50 uH inductance, instead of stictly air core inductance - LISN specs will
give you saturation current, probably well above the current your product
will draw.
Best regards,
Tom Cokenias
Consultant, EMC & Radio Type Approvals
tel 650-726-1263fax 650-726-1252
members,
Thanks all who responded.
I hope CISPR makes this topic clear in near future.
Regards,
Tom
--
Tomonori Sato
URL: http://t-sato.in.coocan.jp
On Sat, 22 Jul 2017 03:10:27 +0900,
"T.Sato" wrote:
> Hello members,
>
> I want to hear of your opinion - while emission me
HP (1), and
Intel (1). And me.
Best regards,
Rich
541-633-7252
On 2/26/2013 6:37 AM, Ron Pickard RPQ wrote:
> Hi Rich,
> Thank you and Tom getting this out to us. After reviewing this document, I
> noticed that it references IEC 62368 Edition 1. As this Edition 1 was
voted
> down I
61000-4-4:1995, you are required to do
L & N separately.
- If the product standard specifies IEC 61000-4-4:2004, you are required to
test them simultaneously. See Tom Sato's reply on the issue further done in
this email.
You are free to test additional combinations of L & N (I kno
uences to magnetic field,
but most non-conductive material should also non-magnetic.
In addition, in case of IEC/EN 61000-4-9:2016, I though that GRP
below the table-top EUT is no longer required.
So, I believe we can simply use wood or foam tables.
wide beamwidth at low frequencies
and maybe make it slightly difficult to achieve low SVSWR.
Regards,
Tom
--
Tomonori Sato
URL: http://homepage3.nifty.com/tsato/
-
This message is from the IEEE Product Safety Engineering Society emc-pstc
discussion list. To post a message to the list, send your e
yzer or tracking generator is very useful.
Regards,
Tom
--
Tomonori Sato
URL: http://homepage3.nifty.com/tsato/
-
This message is from the IEEE Product Safety Engineering Society emc-pstc
discussion list. To post a message to the list, send your e-mail to
All emc-pstc postings are ar
that for each position (F, L, R, and
> the conditional positions), a Svswr is calculated among the 6 locations
> (e.g. F1h1H -F6h1H), but never among positions (e.g. C1h1H, F1h1H,
> L1h1H, R1h1H). Is this correct?
Yes.
It is also suggested in Table 6.
Regards,
Tom
--
Tomonori Sato
URL: ht
unit to power the box.
Regards,
Tom
Tomonori Sato
URL: http://homepage3.nifty.com/tsato/
-
This message is from the IEEE Product Safety Engineering Society emc-pstc
discussion list. To post a message to the list, send your e-mail to
All emc-pstc postings are archived and searchabl
ehicle narrow band limits which is 2 dB lower than
that of EN 55012, the latter requires that the results are at least 2 dB
below the specified limits when a single sample is tested, and then,
they will be effectively identical.
Regards,
Tom
--
Tomonori Sato
URL: http://homepag
formation technology
and will not make the equipment ISM equipment, but in these days, many
equipment also use switching power converters.
I guess one of the main source of the confusion is the name of
"ISM equipment" itself, which suggests any indus
cannot remember
> how NSA was performed when the chamber was built four years ago.
For vertical polarization, I think Figure 8a and 8c shows antenna rigth
at the peripheral of diameter p, although the peripheral is smaller than
the outer circle in the figure.
Regards,
Tom
--
Tomonori Sato
Hi Christopher
Check with UL CCS in Fremont, they have two antenna pattern test chambers.
www.ccsemc.com
Good luck,
best regards
Tom
On Feb 23, 2012, at 1:22 PM, Christopher wrote:
> Folks,
>
> I would like to get the antenna patterns for our 802.11 Access point
> Anten
d. ...
For testing purpose, "lower levels" here may be the lower levels
specified in clause 5 of the standard.
See also "Guidance Note Addresses Surge Test Problems", at:
http://www.ce-mag.com/archive/02/11/williams.html
Regards,
Posted on behalf of Tom Burke, UL:
More good news for those seeking to learn more about IEC 62368-1 as the
ICT Industry prepares for the eventual transition from IEC 60950-1 (and
IEC 60065) to IEC 62368-1. ECMA International, previously known as the
European Computer Manufacturers
Hi Lauren
Is this over the air 1700 kHz transmission or conducted over wire or AC mains?
best regards
Tom Cokenias
On Apr 10, 2013, at 4:00 PM, Crane, Lauren wrote:
> I am looking for advice on how to determine the EU RTTE class of a product.
>
> The product has a base station and
ng device and the EUT is 1m.
Does it actually mean 1m, or is it intended to be 0.5m?
Regards,
Tom
Tomonori Sato
URL: http://homepage3.nifty.com/tsato/
-
This message is from the IEEE Product Safety Engineering Society
emc-pstc discussion list.Website: http://www.ieee-pses.org/
r even a good weapon!
>BR,
>Bob Tims
>Compliance Engineer
>
>> -Original Message-
>> From: Robert Macy [SMTP:m...@california.com]
>> Sent: Tuesday, January 25, 2000 11:42 AM
>> To: Tom Cokenias; Peter Poulos; emc-p...@ieee.org
>> Subject: Re: Magnetic field imm
od time to express your thanks to Tom Bao
for publishing and maintaining RCIC for the past 6
years. It was a useful resource for our industry and will be missed.
Best regards, Art Michael
Int'l Product Safety News(devoted to electrical product safety compliance)
A.E. Michael, Editor
166 Congd
.
Tom Donnelly
From: bob.edwa...@invensys.com [mailto:bob.edwa...@invensys.com]
Sent: Tuesday, January 13, 2004 3:40 AM
To: emc-p...@majordomo.ieee.org
Subject: EMC chamber door lubricant?
Can anyone recommend a spray-on grease which doesn't dry out too quickly
for gasket lubrication o
roup with viruses lately. Particularly the Netsky
>Worm. If this
>continues I will be forced by my company to withdraw from the
>group. Anyone
>else in the same boat?
Tom:
These are spoofed addresses. They do not originate from the group, nor from
the individuals indicated. I trace
and with few or no re-testing.
In my opinion only.
Regards,
Tom
Tomonori Sato
URL: http://homepage3.nifty.com/tsato/
This message is from the IEEE Product Safety Engineering Society
emc-pstc discussion list.Website: http://www.ieee-pses.org/
To post a message to the list, send your e-
and now 802.11 radios operating under 15.247 of the
Rules.
best regards
Tom Cokenias
T.N. Cokenias Consulting
P.O. Box 1086
El Granada CA 94018
tel 650 726 1263
fax 650 726 1252
cell 650 302 0887
At 8:21 AM +0100 8/23/04, Ridler, Samantha wrote:
>Hello All
>
>FCC part 18 requires the
only few known exposure standards in general
and can become quite useless for reference levels not supported by
the meter.
Regards,
Tom
--
Tomonori Sato
URL: http://homepage3.nifty.com/tsato/
-
This message is from the IEEE Product
his environment? Any
suggestions on vendors?
Thanks,
Tom Donnelly
Smiths Aerospace Actuation Systems
tdonnelly@act-sys
This message is from the IEEE EMC Society Product Safety
Technical Committee emc-pstc discussion list.
Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/
To cancel your sub
te:
> If the centrifuge is used for blood, then it is covered under the MDD.
Maybe the In-Vitro Directive, if the centrifuge is intended to
be used for in-vitro diagnostic applications.
Regards,
Tom
Tomonori Sato
URL: http://member.nifty.ne.jp/tsato/
This message is from the IEEE EMC
The ETS catalog confirms this antenna does in fact have a balun built in.
Tom Donnelly
Smiths Aerospace Actuation Systems
tdonnelly@act-sys
From: Luke Turnbull [mailto:luke.turnb...@trw.com]
Sent: Monday, October 13, 2003 6:56 AM
To: emc-p...@ieee.org; ywle...@vtc.edu.hk
Subject: Re: Balun of
/radiotte.html
best regards
Tom Cokenias
T.N. Cokenias Consultingwww.tncokenias.org
P.O. Box 1086
El Granada CA 94018
tel 650 726 1263
fax 650 726 1252
cell 650 302 0887
At 12:31 AM +0100 1/9/05, Konrad StefaŸski wrote:
Hello all
I would like ask you about harmonised
product.
Maybe it is easier to purchase power supply units which are aleady
PS-E marked under the manufacturer's own responsibility.
Please also note that the power cord may also need to be PS-E marked
if it is of a detachable one.
Regards,
Tom
Tomonori Sato
URL: http://homepage3.nifty.
was better left self regulated.
>
> Tom Whissel
> Senior Compliance Engineer
> Cabletron Systems, Inc.
Well, first, you'll have to point me exactly where in
Part 15 telephone equipment is exempted.
It's debatable that the telephone 'company' is exempt from
OSHA s
the closed door
limits have not been met with the doors open, the doors are closed and the test
repeated at the failing frequencies.
This is how the standard is applied by BELLCORE. I perform this testing with
BELLCORE witness on a fairly regular basis.
Tom Donnelly
Lucent Technologies
tdonne
aker: Tom Burke
Location: Hewlett Packard, 19447 Prunridge Ave. Cupertino CA, Bldg. 48,
Oakroom
PRESENTATION:
Mr. Thomas Burke, Underwriters Laboratories Inc., will review recent
developments associated with the Bi-National Standard for Information
Technology Equipment, CSA C22.2 No. 950-95/UL
ISN specs will
give you saturation current, probably well above the current your product
will draw.
Best regards,
Tom Cokenias
Consultant, EMC & Radio Type Approvals
tel 650-726-1263fax 650-726-1252
If it is a Part 18 device the lab is probably misapplying FCC 15.31 (f)(2),
which gives a 40 dB/decade factor. Part 18 is 20 dB, unless multiple distances
are used as Tom pointed out below.
Thanks,
[ElementSignature]
[cid:image554720.jpg@6ED1BEFC.58F12BBE]
David Schaefer
Technical Manager
Hi Scott
What Michael said, yes.
best regards
Tom
On Feb 29, 2012, at 4:26 AM, Michael Derby wrote:
> Hello,
>
> Not quite Scott, I think what Thomas and Charlie were (correctly) saying,
> was……
>
> With harmonized and published standard, we do not need to use accred
Hello all,
I agree with Tom that it only applies to "Class B" computer peripherals.
However, I thought I'd share an interesting recent experience with you, for
your information.
I sent a KDB to the FCC about a boat (luxury yacht) that had a USB port on
the dashboard (
ymposium
> http://www.emc2004.org/
> ------
>
> Tom,
>
> I am assuming your device operates at 13.56 MHz. I ran a NEC-2
> simulation over "average" GND and the reduction in field strength is:
>
> DX 1/d NEC
>
> 30 m0 dB
filter time-constant
approximating that of an average detector.
Ralph McDiarmid, AScT
Compliance Engineering Group
Xantrex Technology Inc.
> -Original Message-
> From: owner-emc-p...@listserv.ieee.org
> [mailto:owner-emc-p...@listserv.ieee.org] On Behalf Of Tom Cokenias
> Sent: Augu
detector.
>
> Ralph McDiarmid, AScT
> Compliance Engineering Group
> Xantrex Technology Inc.
>
>
> > -Original Message-
> > From: owner-emc-p...@listserv.ieee.org
> > [mailto:owner-emc-p...@listserv.ieee.org] On Behalf Of Tom Cokenias
> > Sen
issions/immunities can still a matter.
Regards,
Tom
--
Tomonori Sato
URL: http://t-sato.in.coocan.jp
-
This message is from the IEEE Product Safety Engineering Society emc-pstc
discussion list. To post a message to the list, se
l be applied to standards
which use IEC 61000-4-3 test method.
Regards,
Tom
--
Tomonori Sato
URL: http://t-sato.in.coocan.jp/
-
This message is from the IEEE Product Safety Engineering Society emc-pstc
discussion list. To post a mess
nd associated cabling
...
Arrangements such as placing AE below the RGP or placing AE outside
the measurement area when it is normally located distant from the EUT
may be used to limit the effects of adverse AE emissions or to reduce
measurement time, as long as the arrangement can be shown not to
redu
What do you think about this?
Regards,
Tom
--
Tomonori Sato
URL: http://t-sato.in.coocan.jp
-
This message is from the IEEE Product Safety Engineering Society emc-pstc
discussion list. To post a message to the list, send your
by
both AC line conducted emissions and radiated emissions is greater.
Regards,
Tom
--
Tomonori Sato
URL: http://t-sato.in.coocan.jp
-
This message is from the IEEE Product Safety Engineering Society emc-pstc
discussion list. To p
e best, Doug
PS - The bottom line, every Tom, Dick and Harry should avoid cliché at all
costs.
--
Douglas E Powell
doug...@gmail.com
http://www.linkedin.com/in/dougp01
-
This message is from the IEEE Product Safety Engineering Soc
ld we, deal with such
situation?
Regards,
Tom
Tomonori Sato
URL: http://homepage3.nifty.com/tsato/
-
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discussion list. To post a message to the list, send your e-mail to
All emc-pstc postings are archived and searchab
t authorization requirements are met.
best regards
Tom Cokenias
T.N. Cokenias Consulting
P.O. Box 1086
El Granada CA 94018
On Feb 12, 2009, at 12:53 PM, Derek Walton wrote:
> Hi All,
>
> I have a client who is wanting to send a dozen or so concept
> products to trial locations around
therein.
This means you can do tests at your location if you already have the equipment.
best regards
Tom Cokenias
T.N. Cokenias Consulting
P.O. Box 1086
El Granada CA 94018
On Feb 28, 2012, at 8:07 AM, Scott Xe wrote:
>> I notice that some compliance reports of R&TTE are reviewed by
there anything that need to be cautious?
It can become troublesome to weld thick metal sheets placed on the floor,
and some material may not suitable for welding.
I rather like not to weld and bond them with other means.
Regards,
Tom
-
``Date of cessation
of presumption of conformity of the superseded standard'' as published
in the OJ for the directive.
If you are not sure, maybe you can find the explanation in CENELEC Guide 25.
Regards,
Tom
Tomonori Sato
URL: http://homepage3.nifty.com/tsato/
-
This message
uggest to warn the list members not to post messages to emc-pstc
as carbon-copy (Cc:).
I'm sorry if I was meddlesome...
Regards,
Tom
--
Tomonori Sato
URL: http://member.nifty.ne.jp/tsato/
---
This me
other messages with others recommending WD-40 for this
>application. While this is a good lubricant, and will work
>very well from a
>mechanical standpoint, I would have concerns from an
>electrical standpoint.
>WD-40 is not conductive and will cause the shielding
>effectiveness of t
ed using 1/d as an attenuation factor.
made me think that another extrapolation method may be permitted for
compliance with the section of the FCC rules, and somebody here may
have experience to use the method other than applying 1/d.
That's why I posted the question here.
Regards,
Tom
Tomon
Pfingsten Road
Northbrook, IL
Time: 6:00pm - 7:30pm
Please let either of us know if you plan to attend. Announcement of this
meeting will NOT appear in SCANFAX this time so please spread the word
to your colleagues!
RSVP to:
Tom Brenner - 847/ 537-6400 tbren...@dlsemc.com
rmed
>> with the LISN and EMI filters in place.
>
> I think there is no reason we shouldn't send LISNs to calibration labs.
>
> Additionally, isolation of 40 dB or more is now required for 0.05 MHz
> and above, which would make impedance seen
nts for telecommunication terminals
- new requirements for mobile packet terminals
- modification of requirements for ADSL/SSDSL terminals
- modification of requirements for cable modems
Regards,
Tom
Tomonori Sato
URL: http://member.nifty.ne.jp/tsato/
This message is from the IEEE EMC
Thomas Donnelly; ieee pstc list
>Subject: Re: Antenna Calibration/Site Attenuation
>
>Tom,
>
>Did you get to the presentation about getting the most out of a biconical
>antenna? Some thoughts contained there on antenna calibration, too.
>
>I found some time ago that u
esting to know what assumptions were made to derive the
> field
> intensity profile. I hasten to add I know nothing about NEC or how you
> use
> it.
>
>> From: drcuthb...@micron.com
>> Date: Thu, 8 Jul 2004 07:52:27 -0600
>> To: ,
>> Subject: RE: FCC Part
erstanding that the 10Hz VBW provides a filter
> time-constant approximating that of an average detector.
>
> Ralph McDiarmid, AScT
> Compliance Engineering Group
> Xantrex Technology Inc.
>
>
> > -Original Message-
> > From: owner-emc-p...@listserv
e
assessed WHEN they exceed the limits for continuous disturbances,.."
Also, discontinuous disturbances will be measured with the same
QP detector and higher QP limits will be applied (clause 4.4.2,
C.2, etc.), so the EUT should never exceed the discontinuous
disturbance limits in this case.
Re
CFR 2.947) that incorporate
Class A unintentional radiator and Part 15 intentional radiator?
Regards,
Tom
-
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mined what
letter had been struck...
best regards
Tom Cokenias
T.N. Cokenias Consulting
P.O. Box 1086
El Granada CA 94018
On Jul 13, 2009, at 9:40 AM, Bill Owsley wrote:
Around 1980 a guest professor demonstrated that technique using radiated
emissions. The receiving equipment fit into a
on when a national authority required technical
documentation some years after DoC had been issued.
Regards,
Tom
Tomonori Sato
URL: http://homepage3.nifty.com/tsato/
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This message is from the IEEE Product Safety Engineering Society emc-pstc
discussion list. To post a message to the list, send y
Hi all,
Another question re this directive: anyone have an idea how the standby/off
power management requirement will affect always on network equipment like WiFi
APs, cable modems and the like?
thanks and best regards
Tom Cokenias
T.N. Cokenias Consulting
P.O. Box 1086
El Granada CA
or inside a chamber.
>>
>> Does anyone have any contacts?
>
>ETS Lindgren, and possibly some other manufacturers, supplis low dielectric
>tables which seems MOSTLY made from foam material:
>
> http://www.ets-lindgren.com/LDT
>
>We made our test table from cheaper and
of exemptions or Class A
or B, all Part 15 equipment is subject to the general conditions of
operation in 15.5 and 15.29 which would require the equipment to be
turned off in case of any interference issues.
Regards,
Tom
--
Tomonori Sato
URL: http://h
ds anyway, and I think it would far
easier to put such EUTs on 0.1m insulating support as far as possible
also for 61000-4-4 testing.
Regards,
Tom
--
Tomonori Sato
URL: http://homepage3.nifty.com/tsato/
-
This message is from the I
ld prefer to use a single 3-phase LISN.
BTW, there maybe confusion with the term "single-phase LISNs" here.
Is it LISNs commonly used for single-phase AC supply?
Or is it LISNs for an single power supplying conductor?
Regards,
Tom
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CC
> are supposed to adopt the new CISPR standards.
Yes, VCCI already adopted CISPR 22:2005.
However, at this time, in the Technical requirements V-3/2007.04 clause
1, they wrote:
Enforcement of upper limits of conducted disturbance at the
telecommunication
ports is under consideratio
uld not be covered
by the EMCD in the first place.
However, maybe we should note that componets or sub-assemblies intended
for incorporation into an apparatus by the end user can be deemed to be
an appratatus, hence maybe EMCD applies.
Regards,
Tom
Tomonori Sato
URL: http://homepage3.nifty.
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