- Ternary signal
"Note:" Examples of ternary signals are (a) a pulse that can have a positive, zero, or negative voltage value at any given instant (PAM-3), (b) a sine wave that can assume phases of 0°, 120°, or 240° relative to a
clockpulse (3-PSK), and (c) a carrier wavethat can assume any one of three different frequencies depending on three different modulationsignal significant conditions (3-FM).
Some examples of PAM-3
line codes that use ternary signals are:
hybrid ternary code
MLT-3 encodingused in 100BASE-TX Ethernet
4B3Tused in some ISDN basic rate interface
8B6Tused in 100BASE-T4 Ethernet
* SOQPSK-TG uses ternary continuous phase modulation [https://dspace.byu.edu/handle/1877/58]
3-PSK can be seen as falling between "binary phase-shift keying" (
BPSK) which uses two phases, and "quadrature phase-shift keying" ( QPSK) which uses four phases.
"Source: Portions of this article were taken from
Federal Standard 1037C"
Fast Ethernet#100BASE-T2uses PAM-5, which, like ternary, is one of the few modulation schemes that does not use a power-of-two number of symbols.
three-phase electric power, like 3-PSK, uses 3 phases at a single frequency and amplitude.
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