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Types of Modulation
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Analog voice and digital signals are transmitted through radio frequency by adding these signals to a radio carrier wave through a process called modulation.
There are two types of modulation: analog and digital. P25 digital is the suite of standards for digital mobile radio communications designed for use by public safety organizations in North America.
Analog
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Analog modulation has been the primary technology used in two-way radio communications since the origin of it’s development (AM, FM).
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Transmits natural, analog voice signal.
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Majority of radio systems still operate in analog mode, fire departments generally prefer them.
P25 Digital
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P25 digital is a newer technology, developed within the last 20 years.
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It offers signal encryption, secure communications and better voice quality by eliminating background noise in weak signal areas.
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It is mostly preferred by law enforcement.
