1. The condition that prevails when the instantaneous level of the modulating signal exceeds the value necessary to produce 100% modulation of the carrier.
Note 1: Overmodulation results in spurious emissions by the modulated carrier, and distortion of the recovered modulating signal.
Note 2: Overmodulation in the sense of this definition is almost always considered a fault condition.
2. The… (Read More →)

1. To preempt, manually or automatically, a prescribed procedure.
Note: For example, one might manually override a prescribed course of action programmed to occur in the event of a fault.
2. In telephony, the entering of or seizure of, a busy circuit, i.e., an occupied circuit, by a party other than those using the circuit.
Note: For example, an attendant… (Read More →)

1. In the transition of any parameter from one value to another, the transitory value of the parameter that exceeds the final value.
Note: Overshoot occurs when the transition is from a lower value to a higher value. When the transition is from a higher value to a lower value, and the parameter takes a transitory value that is lower… (Read More →)

[A] Communications path within a computer system or network designed for the authorized transfer of data. [INFOSEC-99]

Of a sinusoidal wave, an integral multiple of the frequency, i.e., the fundamental, of the wave, other than the fundamental itself.
Note 1: The first overtone is twice the frequency of the fundamental, and thus corresponds to the second harmonic; the second overtone is three times the frequency of the fundamental, and thus corresponds to the third harmonic, etc.
Note… (Read More →)

[The] Process of writing patterns of data on top of the data stored on a magnetic medium. [INFOSEC-99]

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