Several advantages of using digital voice modes are that it uses less bandwidth than older analog voice modes such as amplitude modulation, frequency modulation, and single sideband. D- STAR was the first that was designed specifically for amateur radio. Japan Amateur Radio League and uses frequency- division multiple access and minimum- shift keying in its packet- based standard. D- STAR (Digital Smart Technologies for Amateur Radio) is a digital voice and data protocol specification for amateur radio. 1AD handheld transceiver with the D- STAR UT- 1.
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