Transmitter power output
Transmitter power output (TPO) is the actual amount of
power (in
watts) of
RF energy that a
transmitter produces. This is
not the amount of power that a station reports as its
ERP, such as "we're 100,000 watts of rock 'n' roll", but is in fact many times less for the high-power stations. The
antenna's design "magnifies" the signal toward the
horizon, creating
gain.