Doug, Responses to your questions:
1. Cell phones and other wireless devices follow whichever spectrum allocation opens up. The higher frequencies are generally less in demand than the lower ones so that is where the commercial spectrum allocations are occurring. As I understand it, the new commercial spectrum is being taken from that previously allocated to the military (and hence why DFS is enforced on some frequencies). Spectrum allocation = $$! 2. You can find the RoHS requirement (Directive 2002/95/EC) at: http://europa.eu.int/smartapi/cgi/sga_doc?smartapi!celexapi!prod!CELEXnu mdoc&lg=EN&numdoc=32002L0095&model=guichett Cheers, Marko From: On Behalf Of C N Sent: Tuesday, October 25, 2005 5:59 PM To: emc-p...@ieee.org Subject: Two obscure questions for the group ... 1. What is the reason for cell phone frequencies constantly increasing? Now they're up to over 5GHz. 2. Since RoHS does have an impact on my job as a compliance engineer I have to ask this next question. Where is the actual standard for the next restricted substances effort - the Green Standard? I've read many a website, talked to several people, have noted the list of restricted and banned substances with their corresponding PPM max levels, seen references to ISO14000 etc etc ... But I don't know nor seen any actual standard mentioned such as some European Norm cited. Anyone know? Regards, Doug McKean - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/listserv/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
