Main Page | See live article | Alphabetical index In telecommunication, a drift is a comparatively long-term change in an attribute or value of a system or equipment operational parameter. Note 1: The drift should be characterized, such as "diurnal frequency drift" and "output level drift." Note 2: Drift is usually undesirable and unidirectional, but may be bidirectional, cyclic, or of such long-term duration and low excursion rate as to be negligible. Source: from Federal Standard 1037C and from MIL-STD-188 This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.