# Ternary signal

Ternary signal

In telecommunication, a ternary signal is a signal that can assume, at any given instant, one of three significant conditions, such as power level, phase position, pulse duration, or frequency.

"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) a carrier wave that can assume any one of three different frequencies depending on three different modulation signal significant conditions (3-FM).

Some examples of PAM-3 line codes that use ternary signals are:
* hybrid ternary code
* bipolar encoding
* MLT-3 encoding used in 100BASE-TX Ethernet
* B3ZS
* 4B3T used in some ISDN basic 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.

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.

Wikimedia Foundation. 2010.

### Look at other dictionaries:

• Ternary — (from Latin ternarius ) can mean:* Ternary complex, a complex formed by the interaction of three molecules * Ternary compound, a type of chemical compound * Ternary computer, a computer using a ternary numeral system * Ternary form, a form used… …   Wikipedia

• Ternary logic — A ternary, three valued or trivalent logic (sometimes abbreviated 3VL) is a term to describe any of several multi valued logic systems in which there are three truth values indicating true , false and some third value. This is contrasted with the …   Wikipedia

• Hybrid ternary code — The hybrid (H ) ternary line code operates on a hybrid principle that combines the binary non return to zero level (NRZ L) and the polar return to zero (RZ) codes and thus it is called H ternary. The H ternary code has three levels for signal… …   Wikipedia

• Digital signal — Main article: Signal (electronics) A digital signal is a physical signal that is a representation of a sequence of discrete values (a quantified discrete time signal), for example of an arbitrary bit stream, or of a digitized (sampled and analog… …   Wikipedia

• T-carrier — In telecommunications, T carrier, sometimes abbreviated as T CXR , is the generic designator for any of several digitally multiplexed telecommunications carrier systems originally developed by Bell Labs and used in North America, Japan, and Korea …   Wikipedia

• SPPL2A — Signal peptide peptidase like 2A, also known as SPPL2A, is a human gene.cite web | title = Entrez Gene: SPPL2A signal peptide peptidase like 2A| url = http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene Cmd=ShowDetailView TermToSearch=84888|… …   Wikipedia

• Flip-flop (electronics) — An SR latch, constructed from a pair of cross coupled NOR gates. Red and black mean logical 1 and 0 , respectively. In electronics, a flip flop or latch is a circuit that has two stable states and can be used to store state information. The… …   Wikipedia

• Line code — An example of coding a binary signal using rectangular pulse amplitude modulation with polar non return to zero code …   Wikipedia

• semiconductor device — ▪ electronics Introduction       electronic circuit component made from a material that is neither a good conductor nor a good insulator (hence semiconductor). Such devices have found wide applications because of their compactness, reliability,… …   Universalium

• Plot (graphics) — Scatterplot of the eruption interval for Old Faithful (a geyser). A plot is a graphical technique for representing a data set, usually as a graph showing the relationship between two or more variables. The plot can be drawn by hand or by a… …   Wikipedia