Discussion
Occupied bandwidth as defined by regulators is normally the band containing
Answer: C
The standard regulatory definition is the band containing ninety-nine per cent of the transmitted power, with half a per cent excluded at each edge, and it exists so that channel allocations can be enforced consistently. Fifty per cent would be far too permissive and bears no relation to interference. Everything above the noise floor is not a workable definition, since it depends on the victim receiver. And the first lobe is an engineering estimate rather than a regulatory one.
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