[PSES] [External] : [PSES] Date of withdrawal for UL 60950-1 and CSA 60950-1

Thanks Monrad. I appreciate the feedback. Thank-you, .RichardG From: Monrad Monsen Sent: Tuesday, January 26, 2021 3:31 PM To: Richard Georgerian ; EMC-PSTC@LISTSERV.IEEE.ORG Subject: RE: [External] : [PSES] Date of withdrawal for UL 60950-1 and CSA 60950-1 Hi Richard, US

Re: [PSES] [External] : [PSES] Date of withdrawal for UL 60950-1 and CSA 60950-1

Hi Richard, US and Canada has a grandfather clause. One does not have to go back and re-do the safety test & certifications for already released and NRTL approved products. The latest standard revisions must be used to qualify new product designs. Monrad From: Richard Georgerian Sent: Tuesday,

Re: [PSES] Automotive EMC training

Yes, Todd’s training is through his company, www.learnemc.com He generally has monthly webinars. P.S., agreeing with both of us “Kens” might be dangerous! :-) Ken ___ I'm here to help you succeed! Feel free to call or email with any questions

[PSES] Automotive EMC training

?Hi Ken - Is the automotive EMC training from Todd Hubing available anywhere? Chas - 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

Re: [PSES] Digital logic question

​Agree with Ken (both of them!) Chas From: Ken Javor Sent: Tuesday, January 26, 2021 2:16 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Digital logic question This message originated outside of DISH and was sent by: owner-emc-p...@listserv.ieee.org

Re: [PSES] Digital logic question

Makes sense. Awaiting test results... Ken Javor Phone: (256) 650-5261 From: Ken Wyatt Reply-To: Ken Wyatt Date: Tue, 26 Jan 2021 11:56:58 -0700 To: Subject: Re: [PSES] Digital logic question I agree. In the early days at HP, we would commonly place a simple low-pass R-C filter after the

Re: [PSES] [EXTERNAL] RE: [PSES] FCC requirements for in-home BPL devies?

Hello Ghery, Thank you for the background information. It is very useful to me and I appreciate it, as well as the challenges faced by the ham community. I have read some very interesting comments from ARRL in my hunting and gathering. With HomePlug AV extending up to 80 MHz, things aren’t

Re: [PSES] [EXTERNAL] [PSES] Australia safety standard for consumer-grade AC mains surge protectors

Hi Ted: Thanks for looking into this. I'm following up to report on my findings, in case anyone else is interested in this topic. Based on the Table of Contents for AS/NZS 3012 and AS/NZS 3022, it appears that they cover only the physical and mechanical aspects of terminal strips and

Re: [PSES] FCC requirements for in-home BPL devies?

Bob, IIRC (it's been many years since I dealt with these) in-home BPL devices are considered to be "carrier current" devices by the FCC. I didn't work for a manufacturer of such devices, but I was (and still am) involved in the EMC standards writing business. As a carrier current device

Re: [PSES] Digital logic question

I agree. In the early days at HP, we would commonly place a simple low-pass R-C filter after the clock IC (typically, 27 Ohms and 25 pF, or so - calculated at 3dB point of 3 to 5X the clock freq). In fact, with the usual parasitic capacitance, we often could get away with a simple series

Re: [PSES] Digital logic question

Thanks. Well, the first part will be to check for the corrupted rise/fall time. With such a slow clock – 4.19 MHz – it seems to me the simple solution is if the risetime is sub-ten nanoseconds, to simply slow it down with an RC filter, as opposed to redesigning the board stack-up to provide

Re: [PSES] Digital logic question

Hi Ken, The biggest problem I see when faced with RE issues is that clocks, data/address buses and other fast-edged signals do not have an adjacent solid return plane. This is especially important for wireless devices. Have your client check their stack-up, because invariably, you’ll find, if

[PSES] FCC requirements for in-home BPL devies?

Worldly Experts, I am seeking information on Regulations and Test Methods for in-home Powerline Communication devices (Broadband over Powerline). Primary interest is U.S. (FCC) emissions. The requirements for Access BPL (as defined in FCC Part 15.3(t)) are well defined in 15.601, but for

[PSES] Date of withdrawal for UL 60950-1 and CSA 60950-1

Greetings all, Is there a date of withdrawal for the UL and CSA 60950-1? It appears that as long as the product was certified to 60950-1 before December 20, 2020, and the design does not change electrically or use alternate components that require a certification review, the product can still