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ABSORPTION. Dissipation of radio or sound waves as they interact with matter. The absorbing of light waves without reflection or refraction.
ABSORPTION, LAW OF. In Boolean algebra, the law which states that the odd term will be absorbed when a term is combined by logical multiplication with the logical sum of that term and another term, or when a term is combined by logical addition with the logical product of one term and another term (for example, A(A + B) = A + AB = A).
ABSORPTION WAVEMETER. An instrument used to measure audio frequencies.
ABS PLASTIC. A type of plastic formed by Acrylonitrilt Butadiene Styrene and other chemicals. See [Fire Retardant Materials]
ACCELERATING ANODE. An electrode charged several thousand volts positive and used to accelerate electrons toward the front of a cathode-ray tube.
ACCELERATION SERVOSYSTEM. A servo-system that controls the acceleration (rate of change in
velocity) of a load.
ACCELEROMETER. A device that measures the acceleration to which it is subjected and develops a signal proportional to it.
ACCEPTOR IMPURITY. An impurity which, when added to a semiconductor, accepts one electron from a neighboring atom and creates a hole in the lattice structure of the crystal. Also called TRIVALENT IMPURITY.
ACCESS BUS. Is a low speed 4-wire serial bus once used on Personal Computers. Access.Bus uses the I2C [IIC] bus as the electrical hardware interface. The Access bus has a maximum speed is 100kbps over a maximum cable distance of 10 meters, however a repeater may be used. The 4 wires of the interface bus are power/ground, Send Data [SDA] and Serial Clock [SCL]. Refer to the following page for a description of the Access Bus interface page.
ACORN TUBE. A very small tube with closely spaced electrodes and no base. The tube is connected to its circuits by short wire pins that are sealed in a glass or ceramic envelope. The acorn tube is used in low power uhf circuits.
ACOUSTICS. The science of sound.
ACQUISITION. Operational phase of a fire-control or track radar during which the radar system searches a small volume of space in a pre-arranged pattern.
ACTIVE SATELLITE. A satellite that amplifies the received signal and retransmits it back to earth.
ACTUATOR. The part of a switch that is acted upon to cause the switch to change contact connections; for example, toggle, pushbutton, and rocker.
ADB. The ADB or Apple Desktop Bus was a serial bus used by Apple computer to drive the mouse and keyboard interfaces. The cable consisted of one data line [ADB], a power line [+5v] and a ground line. The maximum data rate was 125kbps, actual bus speed was much lower. The ADB bus was rendered obsolete by the introduction of the Firewire interface on Apple Computer products.
AES/AES-256. Advanced Encryption Standard used by the US government.
AES/EBU. Audio Engineering Society/European Broadcasting Union. AES/EBU is one of the common names for a digital audio transfer standard. The standard is also known as XLR because the AES/EBU digital interface is usually implemented using 3-Pin XLR connectors, which happens to be the same type connector used in a professional microphone. One cable carries both left and right-channel audio data. AES/EBU is an alternative to the S/PDIF [Sony/Philips Digital Interface] standard. S/PDIF is a an audio transfer file format which uses an RCA connector.
Next portion of the A listing; "Ag" Terms
