G–2
FM30/FM100/FM250 User's Manual
A B C
AF Audio Frequency; the frequencies between 20 Hz
and 20 kHz in the electromagnetic spectrum.
ALC Automatic Level Control
AM Amplitude Modulation; the process of impressing
information on a radio-frequency signal by varying
its amplitude.
bandwidth The range of frequencies available for signalling.
BCD Binary-Coded Decimal; a digital system that uses
binary codes to represent decimal digits.
BFO Beat Frequency Oscillator
BNC A bayonet locking connector for miniature coax;
said to be short for Bayonet-Neill-Concelman.
broadband As used in the FM transmitter, refers to the entire
audio spectrum as opposed to the spectrum influ-
enced by the pre-emphasis; also called "Wideband."
carrier A continuous signal which is modulated with a
second, information-carrying signal.
crosstalk In FM broadcasting, this term generally refers to
the interaction between the main (L+R) and the
subcarrier (L–R) signals as opposed to "separation"
which generally refers to leakage between left (L)
and right (R) channels.
density (program) A high average of modulation over time.
deviation The amount by which the carrier frequency
changes either side of the center frequency.
DIP Dual In-line Pins; term used to describe a pin
arrangement.
distortion The unwanted changes in signal wave shape that
occur during transmission between two points.
DPM Digital Panel Meter
EPROM Erasable Programmable Read Only Memory
exciter (1) A circuit that supplies the initial oscillator used
in the driver stage. (2) A transmitter configuration
which excludes stereo generation and audio
processing.
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