kes care of mixer
> 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.
>
>
>
&
at 3:30 AM 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:
>
>
n 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
chai
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
chai
icated 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 d
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 le
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 this
any feedback !
Best regards
Paolo Roncone
-
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t;
>
> Best regards
>
> 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:
https://www.ecf
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
HC
Test message
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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
wrote:
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 c
s 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
> referenced/measured
>
> 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 conducted emissions
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 PASS
e is like an unintentional radiator, right? I
have some troubles understanding it, but seems I have to accept it.
Thanks again!
Paolo
On Fri, Jul 7, 2017 at 2:59 PM, Michael Derby wrote:
> Hello,
>
>
>
> I have added some comments below in red text…..
>
>
>
> Michae
ions 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
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 material from any c
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 AC
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. th
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 pro
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
>
Kontron Communication Inc. (Teknor)
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]
u, something doesn't sound right...
Paolo
At 09:36 05/09/2001 -0700, Doug McKean wrote:
Paolo Roncone wrote:
>
> The reason of my inquiry is that we bought samples of "STP" and
"FTP"
> cat.5 cables for 10bT ethernet applications from different vendors
and to
&g
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 o
s on individual wires
or wire couples (as per 802.3 definition above).
Any inputs, suggestions etc. would be appreciated.
Paolo
-------
Paolo Roncone
EMC Compliance Engineer - Cisco Photonics Italy
via Philips 12 - Monza (MI) 20052
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 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 boun
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 S
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 S
tion (T1, T2 R1, R2) whereas 10Base2
is a 2-wire connection. Also 10b2 supports daisy chain but 10bT is
point-to-point.
What kinds of EMC problems are you having with 10b2? Emissions or immunity?
David
-Original Message-----
From: Paolo Roncone [mailto:paolo...@tin.it]
Sent: Wednesday, May 30
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 impeda
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 cab
due to missing 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
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 confid
I try to re-send this today to the emc-pstc group. Yesterday it got kicked back
for unknown reasons.
Paolo Roncone
Hello Martin,
I read a number of excellent replies to your question. I would just like to add
n
limits should be intended to protect public services ... and physics 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 1
5.09 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
ious notes) 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--
Folks:
I got the news that CENELEC is considering to enforce the new revision of the
subject standard by mid-2001. The present version should be mandatoy from
January 1, 2001. The most important amendment is the definition of class D
devices (that would affect a great number of products). My
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 origin
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 is
x27;s 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 pe
tested without 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
the transients (the faster 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 on 04/05/2000 17.12.42
Please
ow the modular approach or not) the
Declaration of Conformity refers to the whole system and manufacturer is
responsible for compliance.
Hope this helps.
Best Regards,
Paolo Roncone
Compuprint - Italy
"Canio Dichirico"
planet .
Having said 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 watc
sh (Lexmark Intl.): " A Study 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
---
to include 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 Informat
al polarization is useful to improve accuracy
of emissions measurements of products (using vertical 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 measureme
ully Anechoic Room (FAR), rather
than in SARs or OATS.
My opinion is that - given the many 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
terested in keeping some posts with a safety subject.
Paolo Roncone
Compuprint s.p.a.
Italy
Michael Vrbanac on 12/03/2000 05.50.08
Ple
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