1-13 COMPLEMENTARY LAW—In Boolean algebra this law states that the logical addition of a quantity and its complement will result in 1 and the logical multiplication of a quantity and its complement will result in a product of 0 [13]. COMPLEMENT NUMBER—A number that when added to another number gives a sum equal to the base of the number system of operation. For example, in the decimal number system, the complement of 1 is 9 [13]. COMPLEX WAVE—(1) A waveform other than a sine wave [9]. (2) A wave that is produced by combining two or more pure tones at the same time [10] [12]. COMPOUND-WOUND MOTORS AND GENERATORS—Machines that have a series field in addition to a shunt field. Such machines have characteristics of both series- and shunt-wound machines [5]. COMPRESSION WAVES—Longitudinal waves that have been compressed (made more dense) as they move away from the source [10]. COMPUTER—A data processor that can perform substantial computation, including numerous arithmetic or logic operations, without intervention by a human operator during the run [13]. CONCURRENT—Pertaining to the occurrence of two or more events or activities within the same specified interval of time [13]. CONDUCTANCE—The ability of a material to conduct or carry an electric current. It is the reciprocal of the resistance of the material and is expressed in mhos or siemens [1] [4] [10]. CONDUCTION BAND—A partially filled energy band in which electrons can move freely [7]. CONDUCTIVITY—The ease with which a substance transmits electricity [1]. CONDUCTOR—(1) A material with a large number of free electrons. (2) A material that easily permits electric current to flow [1]. CONDUIT—A tubular raceway, usually metal or plastic, for holding wires or cables [4]. CONICAL SCANNING—Scanning in which the movement of the beam describes a cone, the axis of which coincides with that of the reflector [18]. CONNECTED ARRAY—Another term for DRIVEN ARRAY [10]. CONTACT—In radar, an object that reflects RF energy; target [18]. CONTINUITY—An uninterrupted, complete path for current flow [3] [16]. CONTINUOUS-WAVE KEYING—The on-off keying of a carrier [12]. CONTROL DIFFERENTIAL TRANSMITTER (CDX)—A type of synchro that transmits angular information equal to the algebraic sum or difference of the electrical input supplied to its stator, the mechanical input supplied to its stator, and the mechanical input supplied to its rotor. The output is an electrical voltage taken from the rotor windings [15]. CONTROL GRID—The electrode of a vacuum tube, other than a diode, upon which a signal voltage is impressed to regulate the plate current [6].

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