- Full scale
In electronics and signal processing, full scale or full code represents the maximum amplitude a system can present.
Electronics and signal processing
In digital systems, a signal is said to be at digital full scale when it has reached the maximum (or minimum) representable value. In an unsigned fixed point binary representation, this occurs when all bits are 1s, but this is a simplified analysis. Full scale also occurs when the minimum value (or maximum rarefaction amplitude) is reached, which would be represented as all 0s. Further, many digital systems use other digital encoding methods, such as two's complement wherein all 1s or all 0s actually occur around the zero crossing, and the maximum and minimum values are not as simply described.
Once a signal has reached digital full scale all headroom has been utilized, and any further increase in amplitude results in an error known as clipping. However, this can be avoided if a DAW switches to floating point software instead of using binary. This usually entails some loss of precision although the final precision should still be significantly better than that which is needed for the final music processing.
The signal passes through an anti-aliasing, resampling, or reconstruction filter, which may increase peak amplitude slightly due to the Gibbs phenomenon (The Gibbs Phenomenon is a mathematical concept and only applies to one point so in practice it is irrelevant to real life circuits and devices). It is possible, for the analog signal represented by the digital data to exceed digital full scale even if the digital data does not, and vice versa. In the analog domain there is no peak/clipping problem unless the d/a analog circuitry was badly designed. In the digital domain there are no peaks created by these conversions.
In analog systems, full scale may be defined by the maximum voltage available, or the maximum deflection (full scale deflection or FSD) or indication of an analog instrument such as a moving coil meter or galvanometer.
If a proper (no clipping/saturation) analog signal is converted to digital via A/D with sufficient samples, and then reconverted to analog via D/A then Nyquist theorem guarantees that there will be no problem in the analog domain due to "peak" issues because the restored analog signal will be an exact copy of the original analog signal.
Wikimedia Foundation. 2010.
Look at other dictionaries:
full-scale — adj [only before noun] 1.) as complete or thorough as possible full scale attack/war/riot etc full scale study/review etc ▪ The government will conduct a full scale inquiry into the crash. 2.) a full scale drawing, model etc is the same size as… … Dictionary of contemporary English
full-scale — full ,scale adjective 1. ) complete or not limited in any way: a full scale investigation into the murder a full scale emergency 2. ) a full scale model or drawing of something is as big as the real thing … Usage of the words and phrases in modern English
full-scale — [fool′skāl′] adj. 1. of or according to the original or standard scale or measure [a full scale drawing] 2. to the utmost limit, degree, etc.; complete and thorough; all out [full scale war] … English World dictionary
full-scale — adj. using all available resources; of actions; as, a full scale effort to find the perpetrator. Syn: all out. [WordNet 1.5] … The Collaborative International Dictionary of English
full-scale — UK US /ˌfʊlˈskeɪl/ adjective [before noun] ► complete, or using all available methods, equipment, money, etc.: »Insurers were relieved by the FSA s refusal to launch a full scale review of past endowment sales. »We have created full scale… … Financial and business terms
full-scale — full′ scale′ adj. 1) having the exact size or proportions of the original: a full scale replica[/ex] 2) using all possible means, facilities, etc.; complete: a full scale investigation[/ex] • Etymology: 1930–35 … From formal English to slang
full-scale — ► ADJECTIVE 1) (of a model or representation) of the same size as the thing represented. 2) unrestricted in extent or intensity: a full scale invasion … English terms dictionary
full-scale — [adj] total, all out all encompassing, comprehensive, exhaustive, extensive, fullblown*, full dress*, full out*, in depth, major, proper, sweeping, thorough, thoroughgoing, total, unlimited, wide ranging; concepts 531,772 Ant. incomplete,… … New thesaurus
Full Scale — Starting out as Full Scale Deflection in 1998, Full Scale was an alternative metal band from Perth, Western Australia. The band moved to Melbourne in the year 2000 and released two EPs, White Arrows and Black Arrows and toured the east coast… … Wikipedia
Full Scale (EP) — Infobox Album | Name = Full Scale Type = studio Artist = Show and A.G. Released = May 24, 1998 Genre = Hip Hop Label = D.I.T.C. Records Producer = Show Last album = Goodfellas (1995) This album = Full Scale (EP) (1998) Next album = Full Scale is… … Wikipedia