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industrial communications handbook 2016
Chapter 2
Radio Basics
Most often, it is the simple neglect of the Basics, the elementary
Physics, and especially the (not-so) Common Sense that is
lacking.
‘Going Wireless’ can seriously add benefit to an Installation,
BUT
it must be
designed
, and not just slapped together with little
regard to actual radiation and propagation constraints.
So many ‘networking’ installations—Industrial, or otherwise—end
up ‘going wireless’ for all the wrong reasons. A perfectly good
setup gets ‘upgraded’—and fails dismally.