Tower on which a visual and a radio target are mounted to check the electrical axis of an antenna.
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PLASTIC BONDING
The joining of plastics by heat, solvents, adhesives, pressure, or radio frequency.
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OUTPUT-METER ADAPTER
Device that can be slipped over the plate prong of the output tube 385 output-meter adapter output power of a radio receiver to provide a conventional terminal to which an output meter can be connected during alignment.
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OUTPUT INDICATOR
A meter or other device that is connected to a radio receiver to indicate variations in output signal strength for alignment and other purposes, without indicating the exact value of output.
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MIRROR INTERFEROMETER
An interferometer used in radio astronomy, in which the sea surface acts as a mirror to reflect radio waves up to a single antenna, where the reflected waves interfere with the waves arriving directly from the source.
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LISTENING STATION
A radio or radar receiving station that is continuously manned for various purposes, such as for radio direction finding or for gaining information about enemy electronic devices.
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INDUCTIVE COUPLER
A mutual inductance that provides electrical coupling between two circuits; used in radio equipment.
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IDENTIFICATION FRIEND OR FOE
A system using pulsed radio transmissions to which equipment carried by friendly forces automatically responds, by emitting a pulse code, thereby identifying themselves from enemy forces; a method of determining the friendly or unfriendly character of aircraft, ships, and army units by other aircraft, ships, or ground force units. Abbreviated IFF.
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HOWL
[ENG ACOUS] Undesirable prolonged sound produced by a radio receiver or audiofrequency amplifier system because of either electric or acoustic feedback.
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HETERODYNE RECEPTION
Radio reception in which the incoming radio-frequency signal is combined with a locally generated rf signal of different frequency, followed by detection. the center of the exterior surface to permit tightening with a spanner.
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GROUND ABSORPTION
The dissipation of energy in radio waves because of absorption by the ground over which the waves are transmitted.
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