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Cable Television In Massachusetts, Padraig O'Malley

Padraig O'Malley

Today the electromagnetic spectrum is crowded with signal traffic used for just about every conceivable communications purpose, ranging from standard navigational time signals at the Very Low Frequency band to satellite communications at the Superhigh Frequency band. Between these two frequency extremes there are five other frequency bands — Low Frequency, Medium Frequency, High Frequency, Very High Frequency, and Ultra High Frequency — each of which can accommodate only a limited number of uses, and each of which is better suited for some uses than for others. Because the spectrum was, like oil, once believed to be in almost unlimited …