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Skew stands for oblique and slanted in German. In transmission technology, the term is synonymous with transit time differences. However, the term is also used in magnetic tape technology and in the reading of bar codes.

  1. In transmission technology, skew denotes the difference between the signal propagation times in the individual pairs of a multipair cable or optical fiber. This effect is particularly critical in the data lines of buses, since the individual lines can have deviations in the signal propagation times. Buses, such as the SCSI bus, can therefore only be increased in clock speed to a limited extent. Skew plays a decisive role in high-speed transmission, for example in 10- gigabit and 100-gigabit Ethernet. In these techniques, the offset of the data blocks is referred to as skew. In multistage transmission methods, too, skew refers to differences in propagation times that have to be compensated for by the receiver.
  2. In magnetic tape technology, skew means that the magnetic tape passes the magnetic head at an angle. This can happen if the tape guide is faulty.
  3. In bar code reading, skew refers to the reading angle at which the bar code is scanned. Skew is the deviation of the reading angle from the vertical. A deviation that is too large can lead to faulty readout.
Englisch: skew
Updated at: 10.05.2011
#Words: 213
Links: indium (In), transmission, magnetic tape (MT), signal, cable
Translations: DE

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