Total posts : 45366
Technically the Part 15 Standard for FM is expressed as 250 microvolts per meter, measured at 3 meters, and not 100 mw. If you actually used 100 mw, you would probably not be in compliance with Part 15. I am not sure how to reword your FAQ, but you probably want to take out the reference to 100 mw on FM. It is fair to say that a Part 15 FM station would only have a range of 200 feet or less. [This is the FCC’s estimate for 0.01 microwatts ERP (Effective Radiated Power), as opposed to transmitter output power.][/quote:e4b66eaf95]
I changed the wording a bit:
FM generally sounds better than AM. FM is a higher-fidelity medium, plus it can carry a stereo signal which makes listening to music more pleasant. However, the FCC Part 15 rules for FM somewhat restrict the distance that the FM signal can be heard from the transmitter. A FM radio station operating in accordance with FCC Part 15 rules could expect to have a range of only a 200 feet or so, whereas a Part 15 AM station could be heard a few miles away under the right conditions.
Thanks for the comments!