My comment is 22 nF is an awful lot of stray capacitance. If I were in my
screen room and wearing thin soled shoes standing on grounded metal sheet I
could see it, but not in a home environment where there is a large
separation between every part of my body and ground.
> From: Ron Pickard
> Date
The salt content makes the body a good conductor, but there still has to be
a return path to ground. The mains wiring is a good conductor too but you
don't get current flow until you plug in a load...
> From: "Dan Anchondo"
> Date: Thu, 2 Dec 2004 16:12:38 -0800
> To:
> Subject: RE: Is one-hand
Ken,
Interesting that you say "I suspect just about anyone living in the
civilized world in the latter half of the 20th or beginning of the 21st
century has at one time or other experienced a one-handed shock." I took
an
informal survey a number of years ago was amazed to discover that
although 10
Hi Ken,
As with you and Gary and I'm fairly sure with just about everyone else on this
list, I've had some
experiences, too. However, I won't share any of them, but suffice it to say as
Gary so eloquently
relayed it "Stupid is as stupid does". You can draw your own pictures.
IMHO, the main resist
All
Could it be possible that the body becomes a pseudo-ground termination and
the current flows because there is "work" (burning,di-fibrillation) because
of our salt content?.
Dan
From: owner-emc-p...@listserv.ieee.org
[mailto:owner-emc-p...@listserv.ieee.org]On Behalf Of Ken Javor
Sent: Thursda
There have been a great many anecdotal tales submitted, and I could add my
own hair-raising adventures. I suspect just about anyone living in the
civilized world in the latter half of the 20th or beginning of the 21st
century has at one time or other experienced a one-handed shock.
So the possibi
Bob,
Yes, such a device is covered by AS/NZS 4268.
No an ETSI 300 330 report would not necessarily be acceptable. AS/NZS 4268
sets the limits but references ETSI 300 330-1 V1.3.2 for the "method of
measurement" against those limits.
Best regards,
Kevin Richardson
Stanimore Pty Limited
Compliance
I didn't want to admit this, but I managed to give myself a one
handed shock from the outlet I was wiring (2 actually before I got mad
enough to stop doing it). I was wiring in some new outlets in my basement.
Started from the physically farthest not yet powered outlet working my way
back t
An anecdote:
My eldest daughter, at an early age, did place a conductor
in a 120V outlet at her grandparents home. As a result of
the shock she received, she stopped breathing. Fortunately,
my father-in-law was nearby and was able to restart her
breathing by only shaking her. If someone were no
Carl Richards posted:
>> Before I rush off back to development, I wondered if anyone in the group
had any advice about implementing small areas of ground plane directly
underneath oscillators ? I'm going to request upper and lower ground planes
with via stitching between them and our internal groun
Peter wrote:
>> standard requires that a field at each point in a 0.5m matrix be within
6 dB of an empirically identified reference node - except:
CONCESSION 1 On p14, Note 2 says that "calibration requirements are
fulfilled if a maximum of 3% of the frequencies does not meet the 6dB
criterion b
Dear Group,
We're working on a next Rev of board on our system and we're having a problem
with a 66MHz oscillator during radiated emissions testing. The board slides
vertically into a shelf(aka the card cage). The solder side of the board is
approx 1/4" from a plated steel vertical which is one of
George:
The formula you have, for free space attenuation due to geometrical
spreading, is NOT applicable to the MW AM broadcast band.
For quick answers, without making a life's study of propagation, go to the
Reference Data for Radio Engineers or similar handbook (old ones were ITT,
new ones are
Hi Folks,
I have an equation for the attenuation of a radiated signal as a function of
(distance, frequency, and environment.)
ATTN = 37 + 20 Log (Freq) + 20 Log (Dist), Freq is in MHz, Distance in
Miles, Environment is free-space/line-of-sight (N=2).
My information is that this equ
In article <39487820b7d1bda1190dd62ec2082a2541af6...@watchguard.com>,
George Stults writes
>I have an equation for the attenuation of a radiated signal as a
>function of (distance, frequency, and environment.)
>
>
>
>ATTN = 37 + 20 Log (Freq) + 20 Log (Dist), Freq is in MHz,
>Dis
George,
this formula is valid only for free space propagation but it is correct for
all frequencies. The 20LOG(Freq) part takes care of the fact that the capture
area of the receiver antenna decreases as 20LOGF. As you know, there is not
really a difference in path loss as frequency is increased.
If that equation were just attenuation over distance, there would be no
frequency factor, or at least the attenuation would not be directly
proportional to frequency. So the equation is somehow taking into account
antenna characteristics (i.e., it is not attenuation, but path loss, quite
different
Could anyone provide information regarding the registration process for
Medical Devices in Russia?
Regards,
Jim Purdie
Medical Graphics
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
Hello Dino,
I think you pose an interesting question. I think the best way to approach it
is from a historical and safety perspective.
First from a historical perspective.
The UL 60950 test level of 1000Vrms is actually extremely conservative
assuming the equipment is protected by primary surg
Would like to thank those who replied on the "subject matter" I will be
following up
with the information provided. If anyone else has any further information
please
pass it in.
Best Regards:
Kevin
Kevin Keegan
Senior Associate
KES & Associates
1 Stonecroft Terrace
Kanata, Ontario
Canada K2K 2V1
Can anyone tell me if RFID devices (13.56 MHz, low power) are covered by
AN/NZS 4268 (Short Range Devices)?
Also, will a test report from a Nationally recognized test lab done to ETSI
300 330 acceptable for Australia?
Thanks,
Bob Heller
3M EMC Laboratory, 76-1-01
St. Paul, MN 55107-1208
Tel: 651
All
FYI
>From Thierry Brefort - a representative of the European Commission.
When anyone has a link to the final, published text please share it.
Ian Gordon
BOC Edwards
From: thierry.bref...@cec.eu.int [mailto:thierry.bref...@cec.eu.int]
Sent: 01 December 2004 16:41
To: ian.gor...@bocedwards.com
In simple terms, the standard requires that a field at each point in a 0.5m
matrix be within 6 dB of an empirically identified reference node - except:
CONCESSION 1 On p14, Note 2 says that "calibration requirements are
fulfilled if a maximum of 3% of the frequencies does not meet the 6dB
criter
Why is it that Bantam connectors/cables are common amongst T1 "outside plant"
test gear yet Bantam cable manufacturers commonly spec their cables at 500 or
650VDC isolation. In fact, the three samples I've inspected measured 0.030"
between Tip/Ring and Sleeve and when tested, breakdown occured at
a
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