Frequency shift

In the physical sciences and in telecommunication, the term frequency shift has the following meanings:

Any change in frequency
A Doppler shift
Any change in the frequency of a radio transmitter or oscillator. (Note: In the radio regime, frequency shift is also called rf shift.)
Frequency-shift telegraphy
In facsimile, a frequency modulation system where one frequency represents picture black and another frequency represents picture white. Frequencies between these two limits may represent shades of gray
An intentional frequency change used for modulation purposes

This article incorporates public domain material from the General Services Administration document "Federal Standard 1037C" (in support of MIL-STD-188).

This disambiguation page lists articles associated with the same title.
If an internal link led you here, you may wish to change the link to point directly to the intended article.