Re: [PSES] 6dB pad

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. > > > &

Re: [PSES] 6dB pad

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: > >

Re: [PSES] 6dB pad

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

[PSES] 6dB pad

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

[PSES] 6dB pad

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

Re: [PSES] Antenna tilting or bore sighting for radiated emissions

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

[PSES] Antenna tilting or boresigjting for radiated emissions

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 - -

[PSES] Implantation Cardiac Devices aka Pacemakers EMI

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

[PSES] ESD generated by rotating turntable

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

[PSES] Railway EMC requirements in USA

any feedback ! Best regards Paolo Roncone - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to All emc-pstc postings are archived and

Re: [PSES] FCC Part 15 - Frequency range of radiated emissions

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 >

[PSES] FCC Part 15 - Frequency range of radiated emissions

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

Re: [PSES] ESD - Floating metal knob, otherwise grounded equipment

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

[PSES] test message

Test message Please delete - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to All emc-pstc postings are archived and searchable on the w

Re: [PSES] EN 55032 Testing on Wired Network Port

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:

Re: [PSES] shielded cable connections

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

Re: [PSES] Clicks per CISPR 14-1

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

Re: [PSES] Clicks per CISPR 14-1

> > 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

[PSES] Clicks per CISPR 14-1

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

Re: [PSES] FCC testing of intentional vs unintentional radiators

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

[PSES] FCC testing of intentional vs unintentional radiators

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

Re: [PSES] DC-power conducted emissions per CISPR11: 2016

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

[PSES] DC-power conducted emissions per CISPR11: 2016

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

[PSES] Line-PE AC power Surge per IEC/EN 61000-4-5

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

[PSES] Line-PE AC power Surge per IEC/EN 61000-4-5

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

[PSES] FCC listing of test facility

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

RE: EMC E&H close field probes / Mindcruiser

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

RE: STP vs FTP Ethernet cables (2)

> 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]

Re: STP vs FTP Ethernet cables (2)

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

Re: STP vs FTP Ethernet cables

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

STP vs FTP Ethernet cables (2)

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

STP vs FTP Ethernet cables

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

Cable layout per GR1089

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

Re: Clock dithering

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

Re: Clock dithering

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

RE: Ethernet baluns

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

Ethernet baluns

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

RE: Site Correlation

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

RE: Site Correlation

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

R: Component Qualification

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

R: Near Field Versus Far Field

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

R: R: Conducted Emissions on Telecom Ports

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

R: Immunity Testing to EN55024

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

R: Conducted Emissions on Telecom Ports

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--

EN 61000-3-2 (Harmonics standard)

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

R: R: R: Voltage Breakdown

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

R: R: Voltage Breakdown

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

R: Voltage Breakdown

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

Re: EFT/Burst

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

Re: origin of common-mode currents

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

Re: Is the "modular approach to EMC" the same as CE + CE = CE?

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"

Re: modest proposal

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

RE: Dithered clocks and EMC - BEWARE

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 ---

Re: Antenna factors to be used for NSA measurement

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

Re: Antenna factors to be used for NSA measurement

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

Re: Antenna factors to be used for NSA measurement

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

Re: EMC and product safety split?

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