Steve Nosko wrote:
Roy,

It has been a while since I read it, but isn't the bulk of the requirement a
field strength number? I run a validation department and we measure field
strength for our products. If there is a section of part 15 which gets
specific (like I think the old 136 KHz part or the AM band where a power and
antenna IS specified, then he's ok. Otherwise he'll have to measure field
strength.

Yes, virtually all the part 15 specifications are field strength.
However, if the power is known, the field strength can often be
approximated by modeling or by making some assumptions about antenna
gain and efficiency. Accurate measurement of field strength isn't trivial.

Roy Lewallen, W7EL