Peter P. yahoo.com> writes: > 50 nW is low by any standards (but higher than 'intention' units). Thanks. In continuation, it's pretty clear that whatever units the FCC uses for these 'intentional' radiators they are legal in the US, and specifically require no broadcast license to use (as opposed to more powerful transmitters, which do). So there must be a way to specify them. Unfortunately none of the (many) units I saw on sale has a relevant datasheet. I wonder why ? Anyway good brand units have a FCC ID (and indicate range: 10-30 ft - I need a fifth of that). Example: http://www.griffintechnology.com/products/itripdock/ So the question of FCC ID is settled. But I wonder if it's needed because of the microprocessor and PLL inside or the FM output ... i.e. is it an intended PLL with microprocessor control, or an intended 'radiator' Peter P. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist