Editing Frequency frogging

{{Short description|Term in telecommunication}}

In [[telecommunications]], the term '''frequency frogging''' has the following meanings: 

# The interchanging of the frequencies of [[carrier signal|carrier]] channels to accomplish specific purposes, such as to prevent [[feedback]] and oscillation, to reduce [[crosstalk]], and to correct for a high [[frequency response]] slope in the [[transmission line]].  
# In [[microwave radio relay]] systems, the alternate use of two frequencies at repeater sites to prevent feedback and oscillation. 

''Note:''  [[Frequency]] frogging is accomplished by having [[modulator]]s, which are integrated into specially designed [[repeater]]s, translate a low-frequency [[group delay|group]] to a high-frequency group, and vice versa. A [[frequency channel]] will appear in the low group for one [[repeater]] section and will then be translated to the high group for the next section because of frequency frogging. This results in nearly constant [[attenuation]] with frequency over two successive repeater sections, and eliminates the need for large slope [[equalization (communications)|equalization]] and adjustments. Singing and crosstalk are minimized because the high-level output of a [[repeater]] is at a different frequency than the low-level input to other repeaters.  It also diminishes [[group delay]] distortion.  A repeater that receives on the high band from both direction and sends on the low band is called Hi-Lo; the other kind Lo-Hi.

==References==
{{FS1037C MS188}}

[[Category:Communication circuits]]


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