"A",
"B",
"C",
"D",
"E",
"F",
"G",
"H",
"I",
"J",
"K",
"L",
"M",
"N",
"O",
"P",
"Q",
"R",
"S",
"T",
"U",
"V",
"W",
"X",
"Y",
"Z"
Previous section of "A" terms and definitions
L-Pad Attenuator Circuit
ATTENUATION. The decrease in magnitude of a signal as it
travels through any transmitting medium, such as a cable or
circuitry. The ability of a filter circuit to reduce the amplitude of unwanted frequencies to a level below that of the desired output frequency. [Resistor Chip Attenuator Manufacturers, RF Attenuator Manufacturers]
ATTRACTION. The force that tends to make two objects approach each other. Attraction exists between two unlike magnetic poles (north and south) or between two unlike static charges.
AUDIO AMPLIFIER. An amplifier designed to amplify frequencies between 15 hertz (15 Hz) and 20
kilohertz (20 kHz).
AUDIO-FREQUENCY-TONE SHIFT. A system that uses amplitude modulation to change dc mark and
space impulses into audio impulses.
AUTOMATIC GAIN CONTROL. A circuit used to limit variations in the output signal
strength of a receiver.
AVALANCHE EFFECT. A reverse breakdown effect in diodes that occurs at reverse voltages beyond 5 volts. The released electrons are accelerated by the electric field, which results in a release of more electrons in a chain or "avalanche" effect.
AVERAGE POWER. The peak power value averaged over the pulse-repetition time. Output power of a transmitter as measured from the start of one pulse to the start of the next pulse.
AVERAGE VALUE (OF AC). The average of all the instantaneous values of one-half cycle of alternating current.
AXIS. A straight line passing through an object to denote its center.
AZIMUTH. Angular measurement in the horizontal plane in a clockwise direction.
