<3b10ff0a008ff6458711e6e375e830412c1...@ustr-exch2.na.uis.unisys.com>, George, David L <george.da...@unisys.com> inimitably wrote: >What is "Dithering"? > >The dictionary defines dithering as agitating or in a state of indecision. >Dithering is a method for distributing energy across a wider spectrum. >Another and more accurate term for dithering is spread spectrum. In a >spread spectrum application the clock frequency or carrier is not fixed. It >varies according to a pseudorandom sequence. Various modulation schemes are >possible. > >There are many uses for this technology. One application is the intentional >radiation for communication purposes. It was first used in the military for >highly confidential applications. Thanks to the development of inexpensive, >reliable semiconductors, this technology has spread to commercial >applications such as cordless telephones, burglar alarms and wireless >networks (WLL and WLANS). The second use of this technology is in digital >equipment as a clock. In this application, the radiation is unintentional >and of much lower in intensity.
David, you may be completely right, and initially even the Radiocommunications Agency in UK thought you were, which is why nothing much happened for a long while after my initial proposal for a study in 1998. But subsequently, evidence of a potential problem emerged. This has to be investigated, and it may not prove to be a real problem. Until we know, it's best to co-operate with the CISPR study, rather than asserting that no problem exists. -- Regards, John Woodgate, OOO - Own Opinions Only. Phone +44 (0)1268 747839 Fax +44 (0)1268 777124. http://www.jmwa.demon.co.uk Why not call a vertically- applied manulo-pedally-operated quasi-planar chernozem-penetrating and excavating implement a SPADE? ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on "Virtual Conference Hall,"
