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An instrument calibrated in logarithmic steps and labeled with decibel units and used for measuring power levels in communication circuits.

Related Terms


  1. An instrument that measures the penetrating power of a beam of xrays or other penetrating radiation. 2. An instrument used to determine the consistency of a material by measurement of the depth to which a standard needle penetrates into it under standard conditions.


Unit of sound pressure or power. Abbreviation is 'dB'. 1 Watt of sound power is equal to 120 dB.


An instrument which measures the cooling power of the air, consisting of a metal cylinder electrically heated to maintain a constant temperature; the electrical heating power required is taken as a measure of the air's cooling power.


  1. An instrument in which current, voltage, or power is measured by the force between a fixed coil and a moving coil. 2. A special type of electric rotating machine used to measure the output torque or driving torque of rotating machinery by the elastic deformation produced.


  1. A worker who sets up and repairs communication and power lines. 2. An assistanttoasurveyor.


  1. A satellite which contains power source to augment the output signal (i.e., reflected only) as contrasted with ACTIVE SATELLITE; a satellite which is a passive reflector. 2. As defined by the International Telecommunications Union (ITU), an earth satellite intended to transmit radio communication signals by reflection.


  1. An instrument used to measure continuously or at intervals a condition that must be kept within prescribed limits, such as radioactivity at some point in a nuclear reactor, a variable quantity in an automatic process control system, the transmissions in a communication channel or bank, or the position of an aircraft in flight. 2. To use meters or special techniques to measure such a condition. 3. A person who watches a monitor.


A power saw used to cut hot metal.


An instrument of punishment being a whip with nine strands as the terminal.


An instrument used to measure the thickness of a material, for example, a sheet of paper.

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