On 03/02/04 16:54, germc said...
FYI FCC part 15 rules 300Mhz-1Ghz relate to emissions
and immunity testing for class A or B ratings
and is just one segment, 30Mhz-300Mhz is another
etc, not relevant to actual transmission frequency
used, that is determined by what relevant section
of the spectrum in unlicensed for use, ie a small
band in the 400Mhz segment is unlicensed and is
used by garage door openers, RF remotes, pronto
and anything else with small transmission powers,
typically sub 100mW. 2.4Ghz is also unlicensed,
hence microwaves, wireless access points, certain
digital house phones use this spectrum band etc
[Link: fcc.gov]You might want to actually read the FCC Part 15 rules before professing your expertise.
Most garage door and security systems in North America use frequencies in the 300MHz-320MHz range.
