C-2 PN: 10580-00343 Rev. H S820E UG
C-2 Glossary Terms Glossary
ADC : Analog-to-Digital Converter (ADC, A/D or A to D) is an
electronic device that converts continuous signals to
discrete digital numbers. The reverse operation is
performed by a digital-to-analog converter (DAC). ADC
can uniquely represent all analog input values within a
specified total input range by a limited number of
digital output codes. Refer also to DAC.
Analog System : An Analog system uses an analog transmission method
to send voice, video and data-using analog signals, such
as electricity or sound waves, that are continuously
variable rather than discreet units as in digital
transmissions. Mobile analog systems include AMPS,
NMT and ETACS.
Analog
Transmission : Analog Transmission refers to signals propagated
through the medium as continuously varying
electromagnetic waves.
Antenna Gain : Antenna gain, also known as antenna directivity, is the
relative gain of the main beam of an antenna pattern to
a reference antenna, usually an isotropic or standard
dipole. Antenna Gain is the effectiveness of a
directional antenna expressed as the ratio of input
power of the directional antenna to input power of an
isotropic radiator to provide the same field strength in
the desired direction. Sometimes related to a dipole
antenna.
Attenuation : Attenuation refers to decreasing in signal magnitude
between two points. These points may be along a radio
path, transmission line or other devices.
Attenuator : Attenuator is a device specifically designed to decrease
the magnitude of a signal transmitted through it.
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