Neets Master Glossary

1-11 CIRCULAR MIL—An area equal to that of a circle with a diameter of 0.001 inch. It is used for measuring the cross-sectional area of wires [1]. CIRCULAR MIL-FOOT—A unit of volume of a conductor having a cross-sectional area of 1 circular mil and a length of 1 foot [4]. CLAMPER—A circuit in which either the upper or lower extremity of a waveform is fixed at a desired value [9]. CLASS A AMPLIFIER OPERATION—The type of operation in which the amplifier is biased so that variations in input signal polarities occur within the limits of cutoff and saturation [7]. CLASS AB AMPLIFIER OPERATION—The type of operation in which the amplifier is biased so that collector current is cut off for a portion of the alternation of the input signal [7]. CLASS B AMPLIFIER OPERATION—The type of operation in which the amplifier is biased so that collector current is cut off for one-half of the input signal [7]. CLASS C AMPLIFIER OPERATION—The type of operation in which the amplifier is biased so that collector current is cut off for more than one-half of the input signal [7] [13]. CLUTTER—Confusing, unwanted echoes that interfere with the observation of desired signals on a radar indicator [18]. COAXIAL CABLE—Cable in which the center conductor is separated from an outer conductor by a dielectric material; used in RF transmission [4]. COAXIAL LINE—A type of transmission line that contains two concentric conductors [10]. CODE—In teletypewriter operation, code is a combination of mark and space conditions representing symbols, figures, or letters [17]. COEFFICIENT OF COUPLING—An expression of the extent to which two inductors are coupled by magnetic lines of force. This is expressed as a decimal or percentage of maximum possible coupling and represented by the letter K [2]. COHERENCE—A definite phase relationship between two energy waves, such as transmitted frequency and reference frequency [18]. COHERENT—Radiation on one frequency [17]. COHERENT OSCILLATOR—In cw radar an oscillator that supplies phase references to provide coherent video from target returns [18]. COIL—An inductive device made by looping turns of wire around a core [2]. COLD-CATHODE TUBE—A gas-filled electron tube that conducts without the use of filaments. Cold- cathode tubes are used as voltage regulators [6]. COLLECTOR—The element in a transistor that collects the current carriers [7]. COLLECTOR-INJECTION MODULATOR—The transistor equivalent of a plate modulator. Modulating voltage is applied to a collector circuit [12].