Flutter (electronics and communication): Difference between revisions

Revision as of 15:09, 17 February 2017

Revision as of 13:37, 5 July 2017

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*Rapid variations in received signal levels, such as variations that may be caused by [[atmospheric]] disturbances, [[antenna (electronics)|antenna]] movements in a high wind, or interaction with other signals.

*In [[radio propagation]], a phenomenon in which nearly all radio signals that are usually reflected by [[ionospheric layer]]s in or above the E-region experience partial or complete [[Absorption (electromagnetic radiation)|absorption]].

*In radio [[transmission (telecommunications)|transmission]], rapidly changing signal levels, together with variable [[Multipath propagation|multipath]] [[time delay]]sdelays, caused by [[Reflection (physics)|reflection]] and possible partial absorption of the signal by aircraft flying through the radio beam or common scatter volume.

*The variation in the transmission characteristics of a loaded [[telephone line]] caused by the action of telegraph direct currents on the [[Electrical load|loading]] coils.

*In recording and reproducing equipment, the deviation of [[frequency]] caused by irregular mechanical motion, ''e.g.,'' that of [[Capstan (tape recorder)|capstan]] angular velocity in a tape transport mechanism, during operation.