Piotr Galka wrote: > 1MHz generator is standard in such systems. > AM and FM receivers are a kind of basic electronic in my opinion so I'd like > to allow for taking frequency characteristics of 465kHz and 10.7MHz filters, > and see AM and FM demodulators working.
Ah, NOW I see your dilemma. For digital systems, a lower frequency clock avoids EMI regulations. For the other, is there any reason why the radio must be sold and qualified disassembled? One doesn't have to meet the Automotive Directive to teach mechanics how to rebuild an engine. In the past, teaching electronics in military schools, we would use an AM or FM reciever built on a sheet of plywood. I agree this is not what one should sell the general public for a kitchen radio, but it appears the bureacrats never considered that education involves more than looking at schematic diagrams! Still, one might get around their short-sighted blunder by building a radio set that, *when assembled in its cabinet*, does comply with the regulations and CAN be "placed on the market" but which, when opened up, may be spread out on a workbench for students to learn from. If connecting to an oscillator circuit with an oscilloscope violates the EMC directive, we may all be out of business. Cortland KA5S - 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 [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
