On Nov 22, 2013, at 11:51 AM, Bill Turner wrote:
> I am a little surprised that no one has brought up the question of measuring
> bandwidth. We need to be careful what we ask for - we just might get it.
For everything related to radio regulations, always refer to the ITU.
http://life.itu.ch/radioclub/rr/art01.htm
Specifically, in relation to your question:
> 1.152 necessary bandwidth: For a given class of emission, the width of
> the frequency band which is just sufficient to ensure the transmission of
> information at the rate and with the quality required under specified
> conditions.
>
> 1.153 occupied bandwidth: The width of a frequency band such that, below
> the lower and above the upper frequency limits, the mean powers emitted are
> each equal to a specified percentage ß/2 of the total mean power of a given
> emission. Unless otherwise specified by the BR for the appropriate class of
> emission, the value of ß/2 should be taken as 0.5%.
I believe Kai had already mentioned the "0.5%" criterion a month or two ago. I
am just repeating it here in case people missed it.
73
Chen, W7AY
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