In phase-encoded recording, a magnetic flux reversal written at the nominal midpoint between successive "1" bits, or between successive "0" bits, to establish proper polarity.

See hit.

The fluctuation of the phase of a wave, relative to a reference.
Note: The fluctuation is often from unknown causes.

The variation in signal amplitude produced by the interaction of two or more signal elements with different relative phases.

1. Introduction of a phase difference of 180°.
Note: Phase inversion may occur with a random or periodic, symmetrical or non-symmetrical waveform, although it is usually produced by the inversion of a symmetrical periodic signal, resulting in a change in sign. A symmetrical periodic signal represented by f (t) = Ae jt, after phase inversion, becomes f1(t) = Ae j(t+),… (Read More →)

Rapid, repeated phase perturbations that result in the intermittent shortening or lengthening of signal elements.
Note 1: Phase jitter may be random or cyclic.
Note 2: The phase departure in phase jitter usually is smaller, but more rapid, than that of phase perturbation. Phase jitter may be expressed in degrees, radians, or seconds. Phase jitter is usually random. However, if… (Read More →)

A sudden phase change in a signal.

Direct proportionality of phase shift to frequency over the frequency range of interest.

The maximum allowable difference between a phase measurement and the actual phase value.

Angle modulation in which the phase angle of a carrier is caused to depart from its reference value by an amount proportional to the instantaneous value of the modulating signal.