Drift (telecommunication)

When drift is in telecommunications a relatively slow change of a value or a property of a system or facility.

Examples

For example, there is a frequency drift ( frequency warping ) and the drift of the output voltage. The drift can go in one direction, but also lead back towards the original state, they may be cyclic, they can of ambient conditions (temperature, humidity) or depend on the components aging.

Influence

The drift is usually undesirable. To take into account particular drift in the calibration (eg in the definition of a zero point ) of devices. Unwanted drift shifts this point. The effect is all the greater, measured the closer to zero ( eg for large enlargements or reinforcements ). One speaks in this context of zero drift. This can be reduced by the chopper amplifier.

Temperature drift

Low temperature drift (English: temperature drift ) is the unwanted change in a physical quantity by changing the (ambient) temperature.

Swell

• Communications Engineering
• Deviation