- Ternary signal
In
telecommunication , a ternary signal is a signal that can assume, at any given instant, one of threesignificant condition s, such as power level, phase position,pulse duration , orfrequency ."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
clock pulse (3-PSK), and (c) acarrier wave that can assume any one of three different frequencies depending on three differentmodulation signal significant conditions (3-FM).Some examples of PAM-3
line code s that use ternary signals are:
*hybrid ternary code
*bipolar encoding
*MLT-3 encoding used in 100BASE-TX Ethernet
*B3ZS
*4B3T used in some ISDNbasic rate interface
*8B6T used in 100BASE-T4 Ethernet
*return-to-zero
* 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 "ee also
*
balanced ternary
*digital signal
*Fast Ethernet#100BASE-T2 uses 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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