ESD Protection for 100BASE-T?
Folks, How does one provide ESD immunity for 100BASE-T ethernet ports without interfering with the signal? Thanks for listening. Mike Donnelly
Re: ADSL Modem and FCC Part 68
On Jun 24, 6:48pm, Jerry Martin wrote: Subject: ADSL Modem and FCC Part 68 A quick question on ADSL modems: Do they have to meet Part 68 requirements? Thank you, Jerry -- End of excerpt from Jerry Martin Jerry, Presently, there are no rules for registering ADSL equipment under Part 68. Not even to prove there is no harm to the POTS line the equipmwnt is connected to. Your best source of Part 68 info is Mr. Bill von Alven at the FCC Part 68 office. He does make an appearance here now and then, but if not, the phone number for him is 202-418-2342 or by e-mail bvona...@fcc.gov Mike Donnelly
GTEM Cell Experiences?
EMC Folks, Does anyone use a GTEM Cell for Part 15 EMI testing? If so , would you share your experiences, in particular, bad experiences, problems, etc. The advertising tells all the benefits, but I am wondering about the downside. Thanks very much. -- Mike Donnelly donne...@agcs.comWD7M Standard disclaimer: These are my own words, not the Company's.
Re: Need EMC Help With Video Card
On Aug 29, 10:19am, Max wrote: Subject: Re: Need EMC Help With Video Card I still have the problem when I remove all of the cables from the system, including the printer cable, etc. The emissions are coming out of the holes in the PC cabinet and this is a very good PC and is well sealed. The largest emissions seem to be coming from the fan vent holes. mkel...@es.com -- End of excerpt from Max Max, We have had problems with fans and fan vent holes very often. All the rules about hole sizes and emissions don't apply when the body of the fan is mounted right up against them and the fan itself is hot with RF. We have had to keep the power wiring to the fan held flat against the chassis and then put ferrites on it to choke off any pickup from emissions inside the box. Once we had to put ferrites on the fan leads from a Pentium cooling fan. It seemed to pick RF up capacitively right off the case of the Pentium it was cooling and then the leads radiated thruout the case. Good luck! -- Mike Donnelly donne...@agcs.comWD7M Standard disclaimer: These are my own words, not the Company's.
Re: New Canadian Marking Requirement?
emc-pstc folks: According to my records this marking requirement took effect April 1, 1995 with publication of ICES-003 Issue 2, Revision 1. Actually it is two sentences, one in English and one in French. (Or is it the same sentence in two languages?) You can ask for your own copy of the standard from the Publications Dept. of Industry Canada at 1-613-990-4761 . Their FAX number is 1-613-952-5108 . There was no charge when I got it. Very nice touch, I thought. We have been putting the statements on our labels for the last year (for products where it is applicable). The tricky part is getting the little diacritical marks over some of the letters in the French sentence. On Jun 3, 11:03am, w...@dolby.com wrote: Subject: New Canadian Marking Requirement? I have just been told that a standard, ICES-003 issue 02, has been released which requires manufacturers to add yet another marking to our digital products (if there is enough space). It's not a symbol. It's an complete sentence. It also requires the statement to exist in product manuals along with shipping a written notice of compliance with each unit. I suppose we would add this statement to the already existing D of C. Is anyone doing this now? Bill Wray Dolby Labs, San Francisco -- End of excerpt from w...@dolby.com -- Mike Donnelly donne...@agcs.comWD7M Standard disclaimer: These are my own words, not the Company's.
