To All, Thanks to all who responded for your views and experiences regarding EMI phenomena related to fiber optics.
You confirmed my intuition. I do not have first hand experience with these beasts, so this gives me ammunition in dealing with problems early as we get into this type circuitry. I hope to get my organization to "see the light." (Pun is intended!) The "dirty little secret" of fiber optics is that rather than solving all EMI problems, as advertised, they have their fair share of EMI issues. This appears to be especially true for modern very high data rate digital fiber optic links, such as Fibre Channel and others. I expect that the legend of fiber optics was born 10-15 years ago from experience with slow speed analog fiber optic links. (The legend being that use of fiber optics eliminated all EMI problems.) From this legend, it would appear that developers of fiber optic connectors, electronic modules, and even systems employ engineers who are good at design of optics, but who are "electromagnetically challenged." Stories indicate that normal good EMI design practices at the PCB level are not always followed in fiber optic module design. This info will quite a jolt to many in my company. Regards to all, Jim Dr. Jim Knighten e-mail: jim.knigh...@sandiego.ncr.com Senior Consulting Engineer NCR 17095 Via del Campo San Diego, CA 92127 http://www.ncr.com <http://www.ncr.com> Tel: 858-485-2537 Fax: 858-485-3788 --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
