Hi Derek,
There is a list of default frequencies half-way down the following page on overclocking the Raspberry Pi variants. Nothing at 240MHz, but plenty at 250MHz. https://www.raspberrypi.org/documentation/configuration/config-txt/overclocking.md Maybe you can play with the overclocking options to see what affects the emissions. Best Wishes, Jon Griver On Fri, 2020-11-27 at 17:49 -0600, DEREK WALTON wrote: Hi Folks, I’m working on a product containing a Raspberry PI as the main controller. I see two very strong emissions at about 240 MHz and 480 MHz. They are obviously related. I’ve discounted video, but not having any deta! ils on th e board it’s making it hard to pin down the source. Anybody make some suggestions as to what the source may be? Thanks, Derek. - - ---------------------------------------------------------------- - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
