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Old July 23rd 12, 04:29 PM posted to rec.radio.amateur.antenna
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Default 315mhz/433mhz transmitter

On 7/23/2012 9:12 AM, Rob wrote:
John S wrote:
On 7/23/2012 1:28 AM, Jeff Liebermann wrote:
On Sun, 22 Jul 2012 23:21:12 -0700, Jeff Liebermann
wrote:

FCC 15.209
http://louise.hallikainen.org/FCC/FccRules/2012/15/209/
200 uv/meter maximum, measured at 3 meters. That works out to about
-46dBm ERP or about 12 milliwatts into a unity gain antenna.

Sorry, brain damage.
The -46dBm should be 10.8dBm ERP


Hmmm... my calculator says P = 12 nanowatts.


That is wrong, 10mW ERP is what these lowpower devices are allowed
to transmit.


If so, then more than 200uV/m is allowed. Do the calculation as Jeff
supplied:

quote
This should explain how it all works:
http://transition.fcc.gov/Bureaus/Engineering_Technology/Documents/bulletins/oet63/oet63rev.pdf
See the calcs on Pg 29.
/quote
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