t; mismatch, and padding the antenna takes care at the opposite end. You need
> a pad at both ends to completely control vswr-related uncertainty.
>
>
>
> Unfortunately, you often cannot stand the desensitization of all the extra
> attenuation.
>
>
>
> --
>
> Ken
Javor
wrote:
> But he is placing the pad at the receiver input in lieu of an internally
> selected 10 dB, not at the antenna's output port.
>
> --
> Ken Javor
>
> (256) 650-5261
>
> On 7/14/23, 6:00 PM, "T.Sato" wrote:
>
> On Fri, 14 Jul
should help with that,
> once you are out of band to it.
>
>
>
> Band stop filters will help with known transmitters.
>
>
>
> --
>
> Ken Javor
>
> (256) 650-5261
>
>
>
> *From: *Paolo Roncone
> *Reply-To: *Paolo Roncone
> *Date: *Friday, J
Hi all,
I'm having a discussion with my colleague about the use of a fixed 6dB
attenuation pad at the input of the EMI receiver for radiated EMI in the
range 30MHz - 6GHz.
The pad I'm using is a Weinschel 6dB N-type 50ohm.
My colleague says the pad is an unnecessary element in the measurement
Hi all,
I'm having a discussion with my colleague about the use of a fixed 6dB
attenuation pad at the input of the EMI receiver for radiated EMI in the
range 30MHz - 6GHz.
The pad I'm using is a Weinschel 6dB N-type 50ohm.
My colleague says the pad is an unnecessary element in the measurement
d in this message (or responsible for
> delivery of the message to such person), you may not copy or deliver this
> message to anyone. In such case, you should destroy this message and kindly
> notify the sender by reply email. Please advise immediately if you or your
> employer do not
Hi all,
Is there an FCC / ANSI requirement, or maybe just recommendation, for
antenna tilting or boresighting wrt radiated emissions in a semi-anechoic
chamber ?
If yes, can you please get me the reference section in FCC Part15 or ANSI
std or somewhere else?
Thanks a lot in advance!
Paolo
-
Hello everybody
anyone can give infos about interference levels on implantation cardiac
devices, also known as pacemakers ?
1. standard levels of EMI that are allowed. Is IEC/EN 60601-1-2 the only
applicable standard or is there any other more specific for pacemakers?
2. typical and hazardous
Hi everybody
we are considering doing radiated emissions scans during the turntable slow
rotation (about 5min/360deg) in a chamber with turntable flush on the metal
floor and sliding contacts.
The likely issue is ESD generated peaks coming from the sliding contacts.
Anyone has experience with
for any feedback !
Best regards
Paolo Roncone
-
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discussion list. To post a message to the list, send your e-mail to
All emc-pstc postings are archived
ards
>
> Charlie
>
>
>
> *Charlie Blackham*
>
> *Sulis Consultants Ltd*
>
> *Tel: +44 (0)7946 624317*
>
> *Web: https://sulisconsultants.com/ <https://sulisconsultants.com/> *
>
> Registered in England and Wales, number 05466247
>
>
>
>
Hi all,
an EUT with built-in Bluetooth 2.4 GHz module must be tested - as any
electrical/electronic equipment sold in the USAm to FCC requirements for
EMI.
Questions:
1. What is the frequency range of EMI radiated emissions for the EUT in
question?
According to § 15.33 of Part 15:
Hi all,
in these cases (floating metal parts of EUT) we connect the floating part
to Earth Ground with a 2x 470kohm cable similar (or same) as that used for
VCP/HCP.
See IEC/EN 61000-4-2 sec. 7.2.4 Ungrounded Equipment:
"A cable with 470 kohm bleeder resistors, similar to the one used with the
Test message
Please delete
-
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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 searchable on the
Hello,
according to EN55032/CISPR32, the port you describe is not a wired network
port (sec.3.1.32), rather a signal/control port. (sec.3.1.30).
In Annex A of the standard I don't see tests required on such a port.
Best regards,
Paolo
On Tue, Apr 24, 2018 at 12:18 PM, itl-emc user group
Hi Doug,
I figure it's the case where you have a high input impedance at the other
end (second box), or just open-ended. In that case the filed to shield
against is prevalent E-field and in that case the shield works pretty much
the same whether it's connected or not at the other end. No need to
the disturbance is a click.
>
> John Woodgate OOO-Own Opinions Only
> J M Woodgate and Associates www.woodjohn.uk
> Rayleigh, Essex UK
>
> On 2017-11-10 12:30, Paolo Roncone wrote:
>
> Hi John,
>
> I see only an upper duration limit (200 msec), because clicks are
>
well as the 200 ms upper limit.
>
> But this probably doesn't help.
>
> John Woodgate OOO-Own Opinions Only
> J M Woodgate and Associates www.woodjohn.uk
> Rayleigh, Essex UK
>
> On 2017-11-10 10:37, Paolo Roncone wrote:
>
> Hi all,
>
> Question:
> IF the EUT Mains condu
Hi all,
Question:
IF the EUT Mains conducted emissions Quasi-peak levels are under the CISPR
14-1 Quasi-peak limit (CISPR 14-1 Table 5), when measured with a CISPR
16-1-1 compliant EMI receiver, is the click procedure/assesment deemed to
be complied with, or not?
In other words, is there in a
d text…..
>
>
>
> Michael.
>
>
>
>
>
> *From:* Paolo Roncone [mailto:paoloc...@gmail.com]
> *Sent:* 07 July 2017 13:44
> *To:* EMC-PSTC@LISTSERV.IEEE.ORG
> *Subject:* [PSES] FCC testing of intentional vs unintentional radiators
>
>
>
> Dear EMC & Radio exper
ections to where in the FCC
rules or publications one can find any unambiguous explanations.
My personal interpretation of the right combination is A/D, but since I got
different opinions I might well be wrong and I decided to seek some
directions within this esteemed forum.
Thanks a lot in a
not
> limited to, total or partial reproduction, communication or
> distribution in any form) by persons other than the designated
> recipient(s) is prohibited. If you have received this e-mail in error,
> please notify the sender either by telephone or by e-mail and
> delete the mater
Hi all,
the new 2016 edition of CISPR11 requires DC power ports conducted emissions
to be done with a "150 Ohm CISPR Delta-network (DC-AN) – see CISPR11 ed.6.1
(2016) sec. 6.2.1.3, 7.3.2.3 and Annex I) instead of a "standard"
50uH/50ohm V-LISN, used for AC-power conducted emissions and also for
Hi everyone,
Question:
how to properly (i.e. formally) test the line-to-ground AC power surge per
IEC 61000-4-5 on Class I products, with Line, Neutral, Ground AC input,
when the following two conditions are met:
1. the Neutral is at 0 VAC, i.e. connected somewhere to the Safety Earth
2.
Hi everyone,
Question:
how to properly (i.e. formally) test the line-to-ground AC power surge per
IEC 61000-4-5 on Class I products, with Line, Neutral, Ground AC input,
when the following two conditions are met:
1. the Neutral is at 0 VAC, i.e. connected somewhere to the Safety Earth
2. the
Hi all,
can anyone help me find the right path to follow for applying for FCC
registration (or listing) of a test site facility ?
I started in www.fcc.gov, but then I got lost and putting test site
listing and the like in the search engine didn't bring up anything useful.
May be the terminology
I fully agree with Ken. I have many times used house-made sniffer probes to
locate sources (and also coupling paths and/or antennas) of radiated emissions.
They helped me identify and fix a number of compliance issues by pointing to
the critical elements.
That is the real plus of these tools.
)
616, rue Curé-Boivin
Boisbriand, Québec
Canada, J7G 2A7
Tel: 1-450-437-4661 ext. 2419
Fax: 1-450-437-8053
Web: http://www.teknor.com http://www.teknor.com
-Original Message-
From: Paolo Roncone [SMTP:pronc...@cisco.com]
Sent: Thursday, September 06, 2001 4:18
call or email me.
Doug
Paolo Roncone wrote:
Hi all,
anybody out there can explain the difference between FTP (Foiled
Twisted Pair) and STP (Shielded Twisted Pair) cables used for Ethernet
links.
In Ethernet standard IEEE 802.3 (2000) I find only a definition of STP
(herebelow in copied
).
Any inputs, suggestions etc. would be appreciated.
Paolo
---
Paolo Roncone
EMC Compliance Engineer - Cisco Photonics Italy
via Philips 12 - Monza (MI) 20052
mailto:pronc...@cisco.com
phone: +39 039209 1538
fax: +39 039209
---
Paolo Roncone
EMC Compliance Engineer - Cisco Photonics Italy
via Philips 12 - Monza (MI) 20052
mailto:pronc...@cisco.com
phone: +39 039209 1538
fax: +39 039209 2036
Hi,
anyone can get me clarifications on the cable layout for radiated immunity
and emissions testing per GR1089 with overhead cable trays (ref. fig.3-13 ) ?
In fig.3.13 + sections 3.4.6 and 3.5.5 of GR1089 I don't see any specified
length of the horizontal section projecting out of the EUT
Hi Cyril,
I have a very good (EMC-wise) experience with clock dithering.
I started using the Spread Spectrum Clock Generation (SSCG) technique
(patented by Lexmark) in 1995 when I worked for my previous company.
We made printers and one of our main customers was IBM. They pushed us to
use an
Hi Cyril,
I have a very good (EMC-wise) experience with clock dithering.
I started using the Spread Spectrum Clock Generation (SSCG) technique
(patented by Lexmark) in 1995 when I worked for my previous company.
We made printers and one of our main customers was IBM. They pushed us to
use an
Hi everyone:
I'm looking for a passive (no ac/dc power supply needed) balun to convert
from an Ethernet 10b2 (unbalanced coax 50 ohm) to an Ethernet 10bT
(balanced, twisted pair, UTP, 100 ohm).
Anyone knows if this kind of box exists ? So far I came up with a perfect
match, but for the
Good point Lothar,
it was about time that the original technical grounds and limitations of CE
method were brought up.
Just one additional point: with the ever increasing operating frequencies
of many electronic products, box and/or PCB level radiation is getting more
and more important vs
coupling between cables and ground
floor (image theory and stuff...).
Anyone who can fill me in more with this would be welcome !
Regards,
Paolo Roncone
At 10:37 AM 1/11/01 -0500, David Heald wrote:
Hello all
There are a few variables that need to be addressed to answer this
question
Dear Koh:
My opinion is that first you should distinguish between active components (like
oscillators, but also EMC sensitive parts like microprocessors, memories,
ASIC's and all fast logic IC's) and passive components (like ferrites).
For the first type, in any case you cannot be enough
works the
same on both sides of the Atlantic... or not
My personal opinion ...
Paolo
-Messaggio originale-
Da: Ken Javor [SMTP:ken.ja...@emccompliance.com]
Inviato:giovedì 7 settembre 2000 18.43
A: Paolo Roncone; 'eric.lif...@ni.com'
Cc: 'emc-p...@ieee.org
x Erms = 15 V/m. The rms value (3 V/m) is most significant, but the peak
value changes a lot !
my 2 cents
Paolo Roncone
Compuprint s.p.a.
Italy
-Messaggio originale-
Da: Gary McInturff [SMTP:gary.mcintu...@worldwidepackets.com]
Inviato:mercoledì 6 settembre 2000
) that the new CISPR22 /
EN55022 standard clearly includes LAN ports in the definition of
telecommunications ports (section 3.6) no matter if they connect to the
outside world or not.
Regards,
Paolo Roncone
Compuprint s.p.a.
Italy
-Messaggio originale-
Da: eric.lif...@ni.com
Hi Rich and all others:
Thanks a lot for clarifying this issue. I was living with one wrong idea about
electro-static build-up mechanisms until you guys got me the right explanation.
This to me is another confirmation of the value of this forum.
Thank you again,
Paolo
-Messaggio
Hi Rich:
thanks for your reply. Now I regret to say that I am a bit confused.
Based on what you say I don't understand why in dry weather you have more
chances of high voltage ESD than in humid weather. As I said this is a common
experience that anyone can confirm.
I thought the explanation
worth...
Regards
Paolo Roncone
-Messaggio originale-
Da: bogdan matoga [SMTP:bogda...@pacbell.net]
Inviato:sabato 8 luglio 2000 22.57
A: Rich Nute
Cc: allen_tu...@pairgain.com; emc-p...@ieee.org
Oggetto:Re: Voltage Breakdown
Gentlemen:
Let me add my penny's
this LAN box.
Our feeling is they want to pull us into working on the problem because the
vendor of the LAN box is not so willing or able to help.
Of course any additional hints can be very helpful.
Paolo Roncone
---
This message is from the IEEE EMC
they are, the more
likely you will see cm currents).
For all the details go to the above mentioned paper
Just my 0.2 cents..
Regards,
Paolo Roncone
Compuprint s.p.a. - Italy
Muriel Bittencourt de Liz mur...@grucad.ufsc.br on 04/05/2000 17.12.42
Please respond to Muriel Bittencourt de Liz mur
refers to the whole system and manufacturer is
responsible for compliance.
Hope this helps.
Best Regards,
Paolo Roncone
Compuprint - Italy
Canio Dichirico cdich...@eso.org on 27/03/2000 14.30.50
Please respond to Canio Dichirico cdich...@eso.org
that, I personally enjoy extending my vocabulary and learning
american slang, but that's another, more personal, point.
Thanks to all
Paolo Roncone
Compuprint - Italy
P.S. BTW (= By The Way) Scott, what's the meaning of Please include gotcha's
to watch out for.. ?
(taken from you post with subj: PCI
of the
Interference Potential of Spread Spectrum Clock Generation Techniques - 1995
IEEE Intl. Symposium on EMC Atlanta ( Symposium Record page 624).
Hope this helps.
Paolo Roncone
Compuprint s.p.a. - Italy
---
This message is from the IEEE EMC Society Product
this AF variations into
measurements
without unacceptable impact on test time. You should use different AFs for
different
antenna heights and for each polarization !
Paolo Roncone
RCIC - http://www.rcic.com
Regulatory Compliance Information Center
and horizontal AFs) other
than in cases - as mentioned by Don Umbdenstock - where the error introduced by
AF variation does not get you over your total budgeted measurement uncertainty.
Any further comment would be highly appreciated.
Regards,
Paolo Roncone
variables involved - we should strive for
the most reasonable compromise between measurement accuracy and ease of
reproducibility of measurement procedures among all test laboratories, and that
(as we all know) is far from easy !
Hope this helps. Let me know !!
Paolo Roncone
Compuprint s.p.a. - Italy
with a safety subject.
Paolo Roncone
Compuprint s.p.a.
Italy
Michael Vrbanac vrban...@swbell.net on 12/03/2000 05.50.08
Please respond to Michael Vrbanac vrban...@swbell.net
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