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D

D'ARSONVAL METER MOVEMENT

The permanent-magnet moving-coil movement used in most meters [3] [16].


DAMPED WAVE

A sinusoidal wave in which the amplitude steadily decreases with time. Often
associated with energy loss [9].


DAMPING

(1) The process of smoothing out oscillations. (2) In a meter, this process is used to keep the pointer of the meter from overshooting the correct reading [3]. (3) A mechanical or electrical technique used in synchro receivers to prevent the rotor from oscillating or spinning. Damping is also used in
servosystems to minimize overshoot of the load [15] [16].


DATA PROCESSING

The execution of a systematic sequence of operations performed upon data.
Synonymous with information processing [13].


DATA TRANSMISSION

The transfer of information from one place to another or from one part of a
system to another [15].


dBm

An abbreviation used to represent power levels above or below a 1-milliwatt reference [16].

DEAD SHORT

A short circuit having minimum resistance [1].

DECIMAL

Pertaining to the number representation system with a radix of ten [13].

DECIMAL DIGIT

In decimal notation, one of the characters 0 through 9 [13].

DECIMAL NOTATION

A fixed radix notation where the radix is ten [13].


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