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refers to very high frequency (VHF) single sideband (SSB)
communication in amateur radio service. VHF frequencies are in the range of
30 MHz to 300 MHz, and SSB is a type of modulation used for voice transmission.
In amateur radio, SSB is commonly used on the VHF bands for voice communication
over distances of several hundred miles, although it can also be used for
shorter distances.
In
SSB, the audio signal is first modulated onto a high-frequency carrier wave,
and then one of the two sidebands is selected and transmitted. The result is a
narrower bandwidth signal that is more efficient in terms of the amount of
bandwidth it requires compared to other modulation methods such as amplitude
modulation (AM).
Amateur
radio VHF SSB is a popular mode of communication for amateur radio operators
because of its ability to provide good voice quality over long distances and
its efficient use of bandwidth. To use VHF SSB, an amateur radio operator must
have a VHF transceiver and an antenna system suitable for the VHF frequencies.
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