Modes: Difference between revisions
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This is a | This is a collection of the most common modes used in amateur radio. | ||
A radio wave can be made to carry information such as sound, text, images or digital data, and a mode is a specific method for for encoding information on a radio wave, in this context known as the "carrier". A mode consists of a modulation and associated procedures. | |||
The modulation is the specific way that the carrier wave is modified or "modulated" in order to encode information. The procedures are the rules that are agreed-upon by all users of a mode that ensures the information is universally understood and transferred successfully. | |||
===Analog Modes=== | ===Analog Modes=== | ||
'' | ''In analog modes, some property of the carrier wave is changed continuously in response to a continuously varying input. This is most commonly used to encode sound information, but can in principle encode nearly any type of information; analog modes exist to transfer images (facsimilie and SSTV) and video (analog television).'' | ||
* [[Frequency Modulation]] | * [[Frequency Modulation]] | ||
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===Digital Modes=== | ===Digital Modes=== | ||
'' | ''In digital modes, the carrier wave is only allowed to change between discrete states, called symbols. These symbols encode the information to be transferred, which is usually text but which can also include sounds, images, videos or other files.'' | ||
*[[CW and Morse Code]] | *[[CW and Morse Code]] | ||
Revision as of 05:36, 12 November 2022
This is a collection of the most common modes used in amateur radio.
A radio wave can be made to carry information such as sound, text, images or digital data, and a mode is a specific method for for encoding information on a radio wave, in this context known as the "carrier". A mode consists of a modulation and associated procedures.
The modulation is the specific way that the carrier wave is modified or "modulated" in order to encode information. The procedures are the rules that are agreed-upon by all users of a mode that ensures the information is universally understood and transferred successfully.
Analog Modes
In analog modes, some property of the carrier wave is changed continuously in response to a continuously varying input. This is most commonly used to encode sound information, but can in principle encode nearly any type of information; analog modes exist to transfer images (facsimilie and SSTV) and video (analog television).
Digital Modes
In digital modes, the carrier wave is only allowed to change between discrete states, called symbols. These symbols encode the information to be transferred, which is usually text but which can also include sounds, images, videos or other files.