Official (Closed) - Non Sensitive
What are your current ratings?
Can consider Schaffner FN9222SR-1-06 Mains Filter IEC Input Socket 250VAC 1A
Tim Foo
From: David Nyffenegger
Sent: Wednesday, 22 January 2020 4:35 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Purchase Mains Input
I have a maxim, do the EMC Test according to the standard, if it passed, do not
test again.
Tim Foo
From: Brian Kunde
Sent: Friday, June 28, 2019 9:24 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Observation Period during Flicker Emissions Test
Reference IEC/EN 61000-3-3:2013 section 6.5
Dear all,
I am curious to know if UNECE Regulation 10 has replaced the Automotive EMC
Directive (2004/104/EC).
Can someone sheld some light in this direction?
sincerely
Tim Foo aka Foo W J
Senior Lecturer School of Engineering, ECE/BME Center
Ngee Ann Polytechnic,
535 Clementi Road,
Singapore
Bala,
How did you collect so many of the PSTC members's emails? Why not join the
group and post once to emc-p...@ieee.org.
In the absence of more information this is just a shot in the dark. Is the
EUT (and supporting periperials) operated by battery or running off the
mains? The way I see
Is FCC+FCC= FCC , that is line the old CE+CE = CE line?
AFAIK, if the set up passed, it 'may' not be tested again. And 'may' is
rather meaningless. Shall is the right words.
In the past, there is always a phrase
This device complies with part 15 of the FCC Rules. Operation is
subjected to
was the case, and
it
was not mentioned in the original posting, then Mr. Wan Juang Foo
deserves
50 lashings with a wet noodle, or the proper cyberspace equivalent.
I want to avoid any lashings in whatsoever form, when I post that
experience. I am truly concern if similar lighting does hit the markets
one
Dear All,
I observe recently that some self blinking (and color changing) LEDs 'are'
what seem to be a substantial emitters of radiated emission/interference.
These LEDs are rigged up by hobbyists as decorative illuminators and acts
more or less like the blinking lights for Christmas trees. I
From: emcp...@aol.com
Reply-To: emcp...@aol.com
List-Post: emc-pstc@listserv.ieee.org
List-Post: emc-pstc@listserv.ieee.org
List-Post: emc-pstc@listserv.ieee.org
List-Post: emc-pstc@listserv.ieee.org
Date: Wed, 18 Jun 2003 20:13:25 EDT
Also, there is a chain-link fence running parallel with the
Sometimes it is like comparing apples and pears.
Is your data in the form of a text file or do you have it as a spreadsheet?
Do you need to visualize a 3D plot from various angles (direction)?
I have the use of Excel in my office and found it is good (lots of bells
and whistles) but that
I have been using gnuplot (http://www.gnuplot.info/) for several years and
it is free.
:-)
Tim Foo
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
I was thinking about those far end IR scanners used to monitor travelers
for 'fever'. So this may be a little O.T.
A prctical 'blackbody' radiates more heat. A good reflector is a poor
emitter.
I just read more about it from a Physics text (Sears, Zemansky and Young).
:-)
Chris Maxwell
Sorry guys,
I think I might have miss out the mailing list. I am sending this out
again because it seem to me that the email address emc-p...@ieee.org is
not an 'alias' (the same as) of emc-p...@majordomo.ieee.org.
Many appologies.
Tim Foo
04/28/03 01:50 PM
To: tkrze...@genius.org.br, ieee
Thomas and all,
There is a list of EMC design rules/guidelines/check-list that was complied
several years ago. You may want to look at it.
'A Summary of PCB design rules relating to EMC' , (131 k b) , Rules and
Guidelines
http://www.geocities.com/timfoo6143/Design_Rules.pdf
There is
I use NEC-2 in a limited way.
Good to hear that there are others on the PSTC list that does that. :-)
BTW, are there any guys out there that work with CEM?
Tim Foo
This message is from the IEEE EMC Society Product Safety
Technical Committee emc-pstc discussion list.
Visit our web site
Ed points to an interesting fact about working in a OATS. 'Exposure': heat
and humidity during several weeks in summer, snow and what have you (gale)
in winter. Mind you, there is quite a period in-between the extremes that
working in an OATS can be quite pleasant. In the context of the
John Barnes jrbar...@iglou.comwrote on 01/04/03 07:55 AM
If you go tohttp://www.cellotape.com/contents.pdfpage 9, is
symbol 139 the one that is on your wireless unit?
Dear all,
Now we are getting somewhere. Thanks John for pointing a symbol that does
finally somewhat fit the bill
Dear all,
This brings to mind about the rational behind the existence of product
standards.
Given the typical product, I am convince that it is 'theoretically'
impossible to predict which 'typical' configuration can give you the worst
case, say for example, radiated emission testing. IMHO, one
-Original Message-
From: Grasso, Charles [mailto:charles.gra...@echostar.com]
Sent: Wednesday, November 27, 2002 2:42 PM
To: emc-p...@majordomo.ieee.org
Subject: New FCC Conducted Emissions question
snip
For anyone with access to CISPR 22
a) Is the measurment BWs the same as the FCC
Feng Li fen...@cadence.com wrote on 11/22/02 09:55 AM
the power and ground of various voltages and characteristics confused me
a lot
I don't see why? Try some simplified 3D CEM type simulation and view the
surface (or displacement) current patterns and the result of haphazard
violation of the
, AFAIK it is
Lotus Notes. I think I will expeiment with different 'mail styles' to get
this right.
cherrio...
:-)
Tim Foo
- Forwarded by Wan Juang Foo/ece/staff/npnet on 11/12/02 09:37 AM
Pierce'
dpie...@openglobe.net, emc-p...@majordomo.ieee.org
m cc: (bcc: Wan Juang
Foo/ece/staff/npnet)
Sent by: Subject: RE: Conducted
Line
which means that whatever the impedance actually is, if properly matched,
mismatch losses may be bounded.
Base on the significant electrical length per turns, I cannot see how
mismatch losses can be 'bounded' especially at 1GHz. Perhaps at a higher
frequency for a much shorter electrical
ken.javor@emccomplian To:
emc-p...@majordomo.ieee.org
ce.comcc: (bcc: Wan Juang
Foo/ece/staff/npnet)
Sent
cc: (bcc: Wan Juang
Foo/ece/staff/npnet)
Sent by: Subject: Ferrites for GND
It is a regular thing that chambers get to be dismantled and reassembled
all the time. IMHO, it is possible to maintain SE of 100 dB for a
relocated chamber. The guys who sell you the brand new chamber always
assemble and test the complete chamber in their factory before shipment.
The
Sent by: To:
emc-p...@majordomo.ieee.org
owner-emc-pstc@majordo cc: (bcc: Wan Juang
Foo/ece/staff/npnet
: (bcc: Wan Juang
Foo/ece/staff/npnet)
owner-emc-pstc@majordo Subject: Re: Question on
highest frequency used
mo.ieee.org
Muriel,
If it is conducted emission through the power cord, then chances are that
(the layout for) the EMI filters had been compromised.
Immediately upon entering the shielded box the mains leads should meet a
mains EMI filter enclosed in a metal box bonded to the Earth on your
shielded box.
bnad...@matrox.com To: Wan Juang Foo
f...@np.edu.sg, emc-p...@ieee.org
Sent by: cc
ajm...@us.ibm.comTo: Aschenberg, Mat
matt.aschenb...@echostar.com
Sent by: cc:
emc-p...@ieee.org, (bcc: Wan Juang Foo/ece/staff/npnet
ed.pr...@cubic.com To: emc
emc-p...@majordomo.ieee.org
Sent by: cc: (bcc: Wan Juang
Foo/ece/staff/npnet
Sent by: cc: (bcc: Wan Juang
Foo/ece/staff/npnet)
owner-emc-pstc@majordo Subject: Re: case of units
To:
emc-p...@majordomo.ieee.org
ce.comcc: (bcc: Wan Juang
Foo/ece/staff/npnet)
Sent by: Subject: PCB
Dear all,
Seen it in the shell of my old notebook. It looks like embedded brass
stands forced into moulded holes. These fasteners have tinny gear
(sprocket like teeth) on the outer rims and a centre treaded hole. It
ought to be custom designed for the purpose of maintaining conduction.
:-)
.
no To: ieee pstc list
emc-p...@ieee.org
Sent by: cc: (bcc: Wan Juang
Foo/ece/staff/npnet
com list emc-p...@ieee.org
Sent by: cc: (bcc: Wan Juang
Foo/ece/staff/npnet)
owner-emc-pstc@majordo Subject
Sent by: cc: (bcc: Wan Juang
Foo/ece/staff/npnet)
owner-emc-pstc@majordo Subject: Decoupling -
capacitor values
ns.comTo: emc-p...@ieee.org
Sent by: cc: (bcc: Wan Juang
Foo/ece/staff/npnet
: (bcc: Wan Juang
Foo/ece/staff/npnet)
Sent by: Subject: Re: EMC SIX
LAYER PCB
owner-emc-pstc@majordo
...@stargate.net, emc-p...@ieee.org
|
|cc: (bcc: Wan Juang Foo/ece/staff/npnet)
|
|Subject: RE: chassis bonding
Dear all,
In the standard, that the document cover the assessment of the 2.4 GHz
wideband transmission and HIPERLAN type 1 equipment, in respect of EMC.
Does this standard cover WLAN?
Tim Foo
---
This message is from the IEEE EMC Society Product Safety
the cable is
electrically short.
--
From: Wan Juang Foo f...@np.edu.sg
To: Ken Javor ken.ja...@emccompliance.com, emc-p...@majordomo.ieee.org
Subject: Re: Electric field radiation from rf currents
Date: Sun, Mar 10, 2002, 8:55 PM
Ken,
The 1/r term is missing from that equation, I belive
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|To: cherryclo...@aol.com
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|cc: emc-p...@majordomo.ieee.org, (bcc: Wan Juang
Foo/ece/staff/npnet
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|-+-
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|To: djumbdenst...@tycoint.com djumbdenst...@tycoint.com,
ieee pstc list emc-p...@ieee.org |
|cc: (bcc: Wan Juang Foo/ece/staff/npnet
I belive the detail working should be...
Starting with P_W= I^2 x R
Where P_W is the units of P is in Watts and P_pW is P in units of pW
ThenP_pW = I^2 x R x 10^(+12)
and P_pW = {I_uA x 10^-6}^2 x R x 10^(+12)
= I_uA^2 x R
Hence P_dBpW = 20 log I_uA + 10 log 50 for R=50
the detectors.
Best Regards
KC Chan
Wan Juang Foo f...@np.edu.sg
01/02/02 08:14 AM
KC,
I suppose you meant the other newer book:
Modern spectrum analyzer theory and applications / Morris Engelson.
Dedham, Mass. : Artech House, c1984.
My library have both copies, I can pop around the corner
KC,
I suppose you meant the other newer book:
Modern spectrum analyzer theory and applications / Morris Engelson.
Dedham, Mass. : Artech House, c1984.
My library have both copies, I can pop around the corner to take a look at
it. What kind of comments are you specifically looking for?
(Patrick Lawler) To: EMC-PSTC
emc-p...@ieee.org
Sent by: cc: (bcc: Wan Juang
Foo/ece/staff/npnet
ken.javor@emccomplian To:
cecil.gitt...@kodak.com, emc-p...@majordomo.ieee.org
ce.comcc: (bcc: Wan Juang
Foo/ece/staff
David,
IEC 61000-4-20 (TEM wave guides TEM cells) is now in 2CD (2nd C'tee
Draft).
:-)
Tim Foo
P/S My appologies to the adminstrators 'Michael Garretson
pstc_ad...@garretson.org et. al.' about an earlier copy of this postiong
going astray.
John Woodgate j...@jmwa.demon.co.uk
12/06/01 09:31
owner-emc-pstc@majordomcc: (bcc: Wan Juang
Foo/ece/staff/npnet)
o.ieee.org Subject: Low Frequency
Conducted Immunity
by: To:
emc-p...@majordomo.ieee.org
owner-emc-pstc@majordomcc: (bcc: Wan Juang
Foo/ece/staff/npnet)
o.ieee.org
ken.javor@emccompliancTo: John Harrington
jharring...@ktlcanada.com, emc-p...@ieee.org
e.com cc: (bcc: Wan Juang
Foo/ece/staff/npnet
72146.373@compuserve.cTo: KC CHAN [PDD]
kcc...@hkpc.org, ieee pstc list emc-p...@ieee.org
omcc: (bcc: Wan Juang
Foo/ece/staff/npnet
...@hkpc.org,
Sent by: cc: (bcc: Wan Juang
Foo/ece/staff/npnet)
owner-emc-pstc@majordomSubject: Re: Active loop
antenna overload
o.ieee.org
Dear all,
The table as posted on the web site was very impressive. However there is
one or two things that is bugging me.
I was aware that the EMC marking in Japan was not mandatory but there are
standards set by VCCI.
Can someone enlighten me on how (if ) it is related to the PSE marking?
peperkin...@cs.com To: PSNet
emc-p...@ieee.org
Sent by: cc: (bcc: Wan Juang
Foo/ece/staff/npnet
by: cc: (bcc: Wan Juang
Foo/ece/staff/npnet)
owner-emc-pstc@majordomSubject: board scanning
on the cheap (sort of)
o.ieee.org
Sent by: cc: (bcc: Wan Juang
Foo/ece/staff/npnet)
owner-emc-pstc@majordomSubject: Re: EMI sniffer
goggles
dmck...@corp.auspex.coTo: EMC-PSTC Discussion
Group emc-p...@majordomo.ieee.org
m cc: (bcc: Wan Juang
Foo/ece/staff/npnet
Ralph Cameron
ral...@igs.net To: Wan Juang Foo
f...@np.edu.sg
List,
I would suggest a noise budget calculation for a EMC bandwidth of 120 kHz
before you proceed. You may need to consider mounting the pre-amp on the
test (receiving) antenna and in such case consider the possibility of ESD
damage during set up.
cheers :-)
Tim Foo,
The so call reduction in emmission does not happen all the time. There is
still the possibility of resonance, this I have observed in several cases
over the past 7 years .
Tim Foo, E-mail: f...@np.edu.sg
ECE, School of Engineering,
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