On Mon, 23 Jul 2012 19:14:28 -0500, John S
wrote:

However, digging down to the FCC stuff on Pg 11, I find that the specs
are really in FCC 15.231(b).
http://louise.hallikainen.org/FCC/FccRules/2012/15/231/
and are approx 11,000 uV/meter. Grinding the numbers again...

Yes, but you are reading only part of the regulations. These are
PERIODIC radiators. Please read the whole thing and tell me how often
and for what period you can transmit.

Ummm... let's set some ground rules first. With all due respect, if
your interest is learning something about FCC rules-n-regs, how the
stuff works, how to make it all play together, how to grind the
numbers, and where to find pieces, I'll bust my posterior to supply
you with direction and/or answers. However, if your intent is make me
jump through hoops, burn my time, or supply information that you could
easily excavate on your own, please find someone else to play your
game. I don't mind being wrong, being told I'm clueless, or doing
research. I do mind wasting my time.

See the last paragraph of 15.231
http://louise.hallikainen.org/FCC/FccRules/2012/15/231/
In addition, devices operated under the provisions of this
paragraph shall be provided with a means for automatically
limiting operation so that the duration of each transmission
shall not be greater than one second and the silent period
between transmissions shall be at least 30 times the
duration of the transmission but in no case less than 10
seconds.

The method of modulation is not specified. Whatever modulation method
is chosen must comply with 15.231(b)(3)(c)
The bandwidth of the emission shall be no wider than 0.25%
of the center frequency for devices operating above 70 MHz and
below 900 MHz. For devices operating above 900 MHz, the emission
shall be no wider than 0.5% of the center frequency. Bandwidth
is determined at the points 20 dB down from the modulated carrier.

At 433MHz, that yields about 1MHz bandwidth which is adequate for most
anything between on-off keying to perhaps frequency hopping spread
spectrum.

Thanks for catching my mistake and I'll double check the numbers
(again) when I get home from some service calls.

Very well. Please point out the pertinent parts that allow this
(undisclosed) mode of operation.

Sorry, but undisclosed modes are by definition undefined and therefore
not codified in the FCC rules-n-regs.


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