G–3
Glossary
exciter
(1) A circuit that supplies the initial oscillator
used in the driver stage. (2) A transmitter con-
figuration which excludes stereo generation and
audio processing.
FET
Field-Effect Transistor
frequency synthesizer
A circuit that generates precise frequency signals
by means of a single crystal oscillator in conjunc-
tion with frequency dividers and multipliers.
FM
Frequency Modulation; the process of impressing
information on a radio signal by varying its fre-
quency.
FSK
Frequency Shift Keying; an FM technique for
shifting the frequency of the main carrier at a
Morse code rate. Used in the on-air identification
of frequencies.
gain reduction
The process of reducing the gain of a given ampli-
fier.
harmonics
Undesirable energy at integral multiples of a
desired, fundamental frequency.
HF
High Frequency; Frequencies in the 3.0 to 30.0
MHz range.
Highband
Frequencies affected by the pre-emphasis.
IC
Integrated Circuit
I/O
Input/Output
LED
Light-Emitting Diode
modulation
The process by which a carrier is varied to repre-
sent an information-carrying signal.
MOSFET
Metal Oxide Semiconductor Field Effect Transistor;
a voltage-controlled device with high input imped-
ance due to its electrically isolated gate.
nearcast
A transmission within a localized geographic area
(ranging from a single room to a several kilome-
ters).
PA
Power Amplifier
