4VSB
From Infogalactic: the planetary knowledge core
Lua error in package.lua at line 80: module 'strict' not found. 4VSB is an abbreviation for 4-level vestigial sideband modulation, a type of radio transmission capable of transmitting two bits of information (22=4) at a time. Other faster but less rugged forms include 8VSB and 16VSB. While 2VSB is more rugged, it is also slower.
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