"A"
"B"
"C",
"D",
"E",
"F",
"G",
"H",
"I",
"J",
"K",
"L",
"M",
"N",
"O",
"P",
"Q",
"R",
"S",
"T",
"U",
"V",
"W",
"X",
"Y",
"Z"
Previous section of "O" definitions and terms
ORDER-WIRE CIRCUIT. A circuit between operators used for operations control and coordination.
OR GATE. A gate that performs the logic OR function. It produces an output 1 whenever any or all of its
inputs is/are 1. Glue Logic
ORIGIN. The point on a graph where the vertical and horizontal axes cross each other.
OSCILLATOR. An oscillator is a non-rotating device that produces alternating current. The frequency is
determined by the characteristics of the device. Oscillator manufacturers.
OUT-OF-CIRCUIT METER. A meter that is not permanently installed in a circuit. Usually portable and
self-contained, these meters are used to check the operation of a circuit or to isolate troubles within a
circuit.
OUTPUT END. The end of a transmission line that is opposite the source; receiving end.
OUTPUT IMPEDANCE. The impedance that is presented to the load by the transmission line and its
source.
OVERCURRENT: Any current in excess of the rated current of equipment or the ampacity of a conductor.
It may result from overload, short circuit, or ground fault. A current in excess of rating
may be accommodated by certain equipment and conductors for a given set of conditions. Hence the
rules for over-current protection are specific for particular situations.
OVERDRIVEN. When the input signal amplitude is increased to the point that the transistor goes into
saturation and cutoff.
OVERLOAD: Operation of equipment in excess of normal, full load rating, or of a conductor in excess
of rated ampacity which, when it persists for a sufficient length of time, would cause damage or
dangerous over-heating. A fault, such as a short circuit or ground fault, is not an overload.
OVERMODULATION. A condition that exists when the peaks of the modulating signal are limited.
