Hello All and Thank you for all your help. !! The knowledge base here is exceptional!
On Mon, Jul 24, 2023 at 1:29 AM James Pawson (U3C) < [email protected]> wrote: > * This message originated outside of DISH and was sent by: > [email protected] <[email protected]> * > ------------------------------ > > Hi Charles, > > > > Why not flip it around? The circuit under your shield is an antenna which > will be as good at receiving as transmitting. Illuminate the circuit with a > known field intensity (radiated RF immunity test IEC 61000-4-3 for example) > and measure the noise voltage at the key point on the circuit (RF > connector). > > > > If you are still working on satellite tuners then presumably you are > worried about in-band signals? Generating fields in the low GHz with a > decent spec of signal generator, a horn antenna, and reducing the distance > could work, even in a non shielded environment. Calibrating field strength > would need maths or an electric field probe at the required distance. > > > > All the best > > James > > > > James Pawson > > Managing Director & EMC Problem Solver > > > > *Unit 3 Compliance Ltd* > > *EMC : Environmental & Vibration : Electrical Safety : CE & UKCA : > Consultancy* > > > > www.unit3compliance.co.uk > <http://www.unit3compliance.co.uk/> > | [email protected] > > +44(0)1274 911747 | +44(0)7811 139957 > > 2 Wellington Business Park, New Lane, Bradford, BD4 8AL > > Registered in England and Wales # 10574298 > > > > *Office hours:* > > *Every morning my full attention is on consultancy, testing, and > troubleshooting activities for our customers’ projects. I’m contactable > between 1300h to 1730h from Monday to Friday.* > > *For inquiries, bookings, and testing updates please send us an email on > [email protected] <[email protected]> or call 01274 > 911747. Our lead times for testing and consultancy are typically 4-5 weeks.* > > > > > > > > > > *From:* Chas Grasso <[email protected]> > *Sent:* Friday, July 21, 2023 8:39 PM > *To:* [email protected] > *Subject:* [PSES] Simulation of signal source under a pwb shield > > > > Hello experts and gurus!! > > > I need to simulate the performance of a BLS (board level shield) and I am > considering > using the IEEE Std 2716-2022 IEEE Guide for the Characterization of the > Effectiveness of Printed Circuit Board Level Shielding document. This > document is however an adaptation of > the methods of evaluating gaskets rather than a focused guide on BLS > performance. > > Question: Does anyone have experience using this Guide as intended for a > BLS solution evaluation? > > Another Question: Would someone guide me to a paper or experiment that > shows > a decent correlation of a simulated source in a BLS versus actual > measurements ? > > > Here's my concern: The problem of how to internally source a signal for > simulation and > measurement seems deceptively simple. Just put an antenna on the inside of > the > shield - right? Well, no. My concern is that the addition of the > shield compromises > the antenna characteristics and so inadvertently this results in better > (or worse) results. > > > > With eager anticipation and appreciation for your help with this!! > > -- > > Charles Grasso > > Dish Technologies > > (c) 303-204-2974 > > (w) 303-706-5467 > > (h) 303-317-5530 > > (e ) [email protected] > > (e2) [email protected] > ------------------------------ > > 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 web at: > https://www.mail-archive.com/[email protected]/ > <https://www.mail-archive.com/[email protected]/%20> > > Website: https://ewh.ieee.org/soc/pses/ > <https://ewh.ieee.org/soc/pses/> > Instructions: https://ewh.ieee.org/soc/pses/list.html (including how to > unsubscribe) > <https://ewh.ieee.org/soc/pses/list.html> > List rules: https://ewh.ieee.org/soc/pses/listrules.html > <https://ewh.ieee.org/soc/pses/listrules.html> > > For help, send mail to the list administrators: > Mike Sherman at: [email protected] > Rick Linford at: [email protected] > > For policy questions, send mail to: > Jim Bacher at: [email protected] > ------------------------------ > > To unsubscribe from the EMC-PSTC list, click the following link: > https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1 > <https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1> > -- Charles Grasso Dish Technologies (c) 303-204-2974 (w) 303-706-5467 (h) 303-317-5530 (e ) [email protected] (e2) [email protected] - ---------------------------------------------------------------- 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 <[email protected]> All emc-pstc postings are archived and searchable on the web at: https://www.mail-archive.com/[email protected]/ Website: https://ewh.ieee.org/soc/pses/ Instructions: https://ewh.ieee.org/soc/pses/list.html (including how to unsubscribe) List rules: https://ewh.ieee.org/soc/pses/listrules.html For help, send mail to the list administrators: Mike Sherman at: [email protected] Rick Linford at: [email protected] For policy questions, send mail to: Jim Bacher: <[email protected]> _________________________________________________ To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1
