Viper Model 480XV - Manual (Page 45)

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ASK Amplitude Shift Keying—a method of transmitting data.
Control Unit: The "brain" of your system. Usually hidden under
the dash area of the vehicle. It houses the microprocessor which
monitors your vehicle and controls all of the system's functions.
Input : A physical connection to the system. An input can be
provided by a sensor, pinswitch or through an existing system in
the vehicle, such as ignition or courtesy lights.
In-vehicle status LED : A light mounted somewhere in the vehicle.
It is used to indicate the status of your system. It is also used to
report triggers and faults in the system or sensors.
LCD : This is a Liquid Crystal Display used on your remote trans-
mitter to display your vehicles status/alarm information.
LED : A light mounted somewhere in the vehicle. It is used to
indicate the status of your system. It is also used to report trig-
gers and faults in the system or sensors.
Siren : Noise generating device usually installed in the engine
compartment of the vehicle. It is responsible for generating the
"chirps" you hear, as well as the tones you hear while the alarm
is triggered.
Transmitter : Hand-held, remote control which operates the
various functions of your system.