A frequency plan, bandplan, band plan or wavelength plan is a plan for using a particular band of radio frequencies, that are a portion of the electromagnetic spectrum. Each frequency plan defines the frequency range to be included, how channels are to be defined, and what will be carried on those channels. Typical definitions set forth in a frequency plan are: *

numbering scheme There are many different numbering schemes for assigning nominal numbers to entities. These generally require an agreed set of rules, or a central coordinator. The schemes can be considered to be examples of a primary key of a database management ...

– which channel numbers or letters (if any) will be assigned *

center frequencies In electrical engineering and telecommunications, the center frequency of a filter or channel is a measure of a central frequency between the upper and lower cutoff frequencies. It is usually defined as either the arithmetic mean or the geom ...

– how far apart the carrier wave for each channel will be * bandwidth and/or deviation – how wide each channel will be *

spectral mask {{unreferenced, date=February 2008 In telecommunications, a spectral mask, also known as a channel mask or transmission mask, is a mathematically-defined set of lines applied to the levels of radio (or optical) transmissions. The spectral mask ...

– how extraneous signals will be attenuated by frequency *

modulation In electronics and telecommunications, modulation is the process of varying one or more properties of a periodic waveform, called the ''carrier signal'', with a separate signal called the ''modulation signal'' that typically contains informatio ...

– what type will be used or are permissible *content – what types of information are allowed, such as audio or video,

analog Analog or analogue may refer to: Computing and electronics * Analog signal, in which information is encoded in a continuous variable ** Analog device, an apparatus that operates on analog signals *** Analog electronics, circuits which use analo ...

digital Digital usually refers to something using discrete digits, often binary digits. Technology and computing Hardware *Digital electronics, electronic circuits which operate using digital signals **Digital camera, which captures and stores digital i ...

* licensing – what the procedure will be to obtain a broadcast license The actual authorized frequency bands are defined by the ITU and the local regulating agencies like the US Federal Communications Commission (FCC) and voluntary best practices help avoid interference.US ARRL Amateur Radio Bands and power limit
Graphical Frequency Allocations
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See also