Ken Javor ken.ja...@emccompliance.com wrote (in
befa8724.26e04%ken.ja...@emccompliance.com) about 'Radiated emission
measurement below 30MHz', on Wed, 13 Jul 2005:
Mr. Woodgate's comment about the the electric field probe needing to be
several meters long needs some amplification.
I meant
Mr. Woodgate's comment about the the electric field probe needing to be
several meters long needs some amplification.
There are two different types of 41 rod that have varying degrees of
sensitivity. An active model, where the base of the rod drives a FET-input
amplifier, can be very sensitive
Brent DeWitt bdew...@ix.netcom.com wrote (in
jfekiiblahflflapjdmdmempggaa.bdew...@ix.netcom.com) about 'Radiated
emission measurement below 30MHz', on Tue, 12 Jul 2005:
Robert has described the radiator as an E-field device, yet no
CISPR/ETSI/EN/FCC emissions standards use anything
-p...@ieee.org
Subject: RE: Radiated emission measurement below 30MHz
I don't know if this helps...
Europe has standards for short range devices such as EN 300330 and country
exceptions listed in ERC Recommendation 70-03. Although this standard is
for inductive loop systems
-p...@ieee.org] On Behalf
Of John Woodgate
Sent: Tuesday, July 12, 2005 2:06 PM
To: emc-p...@ieee.org
Subject: Re: Radiated emission measurement below 30MHz
Lothar Schmidt lothar.schm...@cetecomusa.com wrote (in
10592ca6793bc242bb6dcaa4f9c3b3f57e5...@hobbes.cetecomusa.inc) about
'Radiated emission
Lothar Schmidt lothar.schm...@cetecomusa.com wrote (in
10592ca6793bc242bb6dcaa4f9c3b3f57e5...@hobbes.cetecomusa.inc) about
'Radiated emission measurement below 30MHz', on Tue, 12 Jul 2005:
Any intentional radiator need to have license.
Except for license-exempt devices, of course.
--
Regards
drcuthb...@micron.com wrote (in
f72651ec60c2c945878cf1cf6a3e5af4949...@ntxboimbx13.micron.com) about
'Radiated emission measurement below 30MHz', on Tue, 12 Jul 2005:
All that matters is the end result - the radiated field. This might
even come down to how it impacts the world.
That's
djumbdenst...@tycoint.com wrote (in
AE34E7FDD9D01F42994924D4C4EB6A4F09945BBC@flbocexu05) about 'Radiated
emission measurement below 30MHz', on Tue, 12 Jul 2005:
In some bands, emissions are distinguished as spurious or carrier.
Spurious is allowed (less than a given level) whereas intentional
Robert A. Macy m...@california.com wrote (in
web-98551...@california.com) about 'Radiated emission measurement
below 30MHz', on Tue, 12 Jul 2005:
Yet, not allowed, go figure.
Who decreed 'not allowed'? A test-house has no business to make such a
decision. Even a (European) Notified Body would
...@ieee.org
07/12/2005 11:41 AM
To:Ken Javor ken.ja...@emccompliance.com,
emc-p...@ieee.org
cc:
Subject:RE: Radiated emission measurement below 30MHz
Ken,
This is a good example. IN Europe this is not allowed by the rules. Any
Boca Raton, FL 33487 USA
561.912.6440
djumbdenst...@tycoint.com
From: Ken Javor [mailto:ken.ja...@emccompliance.com]
Sent: Tuesday, July 12, 2005 1:59 PM
To: emc-p...@ieee.org
Subject: Re: Radiated emission measurement below 30MHz
You are vastly OVERESTIMATING the load at 10 pF. A 41 rod over
...@ieee.org
Subject: RE: Radiated emission measurement below 30MHz
Ken,
This is a good example. IN Europe this is not allowed by the rules. Any
intentional radiator need to have license. Some can be general some are
individual and it is not a matter of power. It is only the intentional
part
measurement below 30MHz
On a philosophical note, I wonder if it's worth distinguishing between
unintentional and intentional radiators at such miniscule power levels.
Ralph McDiarmid, AScT
Compliance Engineering Group
Xantrex Technology Inc.
This message is from the IEEE Product Safety Engineering
are not the
intended recipient.
Thank you.
From: owner-emc-p...@ieee.org [mailto:owner-emc-p...@ieee.org] On Behalf
Of Ken Javor
Sent: Tuesday, July 12, 2005 10:59 AM
To: emc-p...@ieee.org
Subject: Re: Radiated emission measurement below 30MHz
You are vastly OVERESTIMATING the load at 10 pF
Subject: Re: Radiated emission measurement below 30MHz
It radiated an ELECTROSTATIC field. We're talking voltage
field of 100V at 150KHz. A little 1 inch wire poked out
with 100 V on it. Current was the load of the parasitic
capacitance around 10pF. You can't even see that 10 m away
Yet
: Tuesday, July 12, 2005 11:52 AM
To: John Woodgate
Cc: emc-p...@ieee.org
Subject: Re: Radiated emission measurement below 30MHz
It radiated an ELECTROSTATIC field. We're talking voltage
field of 100V at 150KHz. A little 1 inch wire poked out
with 100 V on it. Current was the load
Robert Macy wrote:
Now back at 150KHz, worked great, battery friendly,
couldn't even see the energy, so why couldn't we use that
spectrum? Because, by definition, not allowed to.
OK. So why not move it to (say) 148 KHz? Problem solved.
Cortland Richmond
This message is from the IEEE
-
On Tue, 12 Jul 2005 05:33:29 +0100
John Woodgate j...@jmwa.demon.co.uk wrote:
Robert A. Macy m...@california.com wrote (in
web-98517...@california.com) about 'Radiated emission
measurement below 30MHz', on Mon, 11 Jul 2005:
Is this allowed?
It was my understanding that one of my clients tried
[mailto:owner-emc-p...@ieee.org] On Behalf
Of John Woodgate
Sent: July 11, 2005 9:33 PM
To: emc-p...@ieee.org
Subject: Re: Radiated emission measurement below 30MHz
Robert A. Macy m...@california.com wrote (in
web-98517...@california.com) about 'Radiated emission
measurement
below 30MHz
PM
To: djumbdenst...@tycoint.com
Cc: emc-p...@ieee.org
Subject: Re: Radiated emission measurement below 30MHz
Is this allowed?
It was my understanding that one of my clients tried to
get
a *very* low power intentianal radiator [at these
frequencies, radiator is a euphemism
Of John Woodgate
Sent: July 11, 2005 9:33 PM
To: emc-p...@ieee.org
Subject: Re: Radiated emission measurement below 30MHz
Robert A. Macy m...@california.com wrote (in
web-98517...@california.com) about 'Radiated emission measurement
below 30MHz', on Mon, 11 Jul 2005:
Is this allowed?
It was my
Robert A. Macy m...@california.com wrote (in
web-98517...@california.com) about 'Radiated emission measurement
below 30MHz', on Mon, 11 Jul 2005:
Is this allowed?
It was my understanding that one of my clients tried to get a *very*
low power intentianal radiator [at these frequencies, radiator
Is this allowed?
It was my understanding that one of my clients tried to get
a *very* low power intentianal radiator [at these
frequencies, radiator is a euphemism] through Europe and
due to some application there, couldn't even start although
the power could not even be measured within 10
, FL 33487 USA
561.912.6440
djumbdenst...@tycoint.com
From: John Woodgate [mailto:j...@jmwa.demon.co.uk]
Sent: Monday, July 11, 2005 3:43 PM
To: emc-p...@ieee.org
Subject: Re: Radiated emission measurement below 30MHz
djumbdenst...@tycoint.com wrote (in
AE34E7FDD9D01F42994924D4C4EB6A4F09906B72
djumbdenst...@tycoint.com wrote (in
AE34E7FDD9D01F42994924D4C4EB6A4F09906B72@flbocexu05) about 'Radiated
emission measurement below 30MHz', on Mon, 11 Jul 2005:
When doing 2 point roll-off calculations for inductive loop systems,
one would expect 3rd order roll-off for simple, non-canceling
/30 - 1000 MHz.
From: Y W Leung leungderek2...@yahoo.com.hk
Date: Wed, 29 Jun 2005 11:40:20 +0800 (CST)
To: EMC-pstc emc-p...@ieee.org
Subject: Radiated emssion measurement below 30MHz
Dear all,
In EN300330 radiated emission measurement, Annex A 1.1 mentioned
/30 - 1000 MHz.
From: Y W Leung leungderek2...@yahoo.com.hk
Date: Wed, 29 Jun 2005 11:40:20 +0800 (CST)
To: EMC-pstc emc-p...@ieee.org
Subject: Radiated emssion measurement below 30MHz
Dear all,
In EN300330 radiated emission measurement, Annex A 1.1 mentioned
...@ieee.org
Subject: Radiated emssion measurement below 30MHz
Dear all,
In EN300330 radiated emission measurement, Annex A 1.1 mentioned about for
measurement (on an outdoor test site) of frequencies below 30MHz, no
artificial ground plane shall be used. But for 30MHz or above, a conducting
Dear all,
In EN300330 radiated emission measurement, Annex A 1.1 mentioned about for
measurement (on an outdoor test site) of frequencies below 30MHz, no
artificial ground plane shall be used. But for 30MHz or above, a conducting
ground plane shall be used. Is anyone know the reason why the
: KC CHAN [PDD][SMTP:kcc...@hkpc.org]
Reply To: KC CHAN [PDD]
Sent: Thursday, June 06, 2002 10:36 PM
To: emc-p...@majordomo.ieee.org
Subject: Measurement below 30MHz
To all
I just came across a Japanese standard about a RFID product at 13.5 MHZ,
it says
...@majordomo.ieee.org
Subject: Measurement below 30MHz
To all
I just came across a Japanese standard about a RFID product at 13.5 MHZ, it
says that measurement of FCC from 30m to 3m will need to take the 20dB
conversion(ie 20dB/decade) into account.
But I found a statement from FCC part 15.31(f)(2
...@majordomo.ieee.org
Subject: Measurement below 30MHz
Date: Thu, Jun 6, 2002, 9:36 PM
To all
I just came across a Japanese standard about a RFID product at 13.5 MHZ, it
says that measurement of FCC from 30m to 3m will need to take the 20dB
conversion(ie 20dB/decade) into account.
But I
extrapolation factor shall be used.
I just want to clarify which we should use for measurement below 30MHz,
20dB/decade or 40/decade?
Thank you
KC Chan
---
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