Start signal
Encyclopedia
In telecommunication
, the term start signal:
A start signal is limited to one signal element
usually having the duration of a unit interval
.
Telecommunication
Telecommunication is the transmission of information over significant distances to communicate. In earlier times, telecommunications involved the use of visual signals, such as beacons, smoke signals, semaphore telegraphs, signal flags, and optical heliographs, or audio messages via coded...
, the term start signal:
- A signal that prepares a device to receive dataDataThe term data refers to qualitative or quantitative attributes of a variable or set of variables. Data are typically the results of measurements and can be the basis of graphs, images, or observations of a set of variables. Data are often viewed as the lowest level of abstraction from which...
or to perform a function. Contrast with A-condition. - In asynchronous serial communication, a signal at the beginning of a characterCharacter (computing)In computer and machine-based telecommunications terminology, a character is a unit of information that roughly corresponds to a grapheme, grapheme-like unit, or symbol, such as in an alphabet or syllabary in the written form of a natural language....
that prepares the receiving device for the reception of the codeCodeA code is a rule for converting a piece of information into another form or representation , not necessarily of the same type....
elements.
A start signal is limited to one signal element
Signal element
In signal theory, a signal element is a part of a signal that is distinguished by its:*duration,*magnitude,*nature ,*relative position to other elements,*transition from one signal state to another....
usually having the duration of a unit interval
Unit interval (data transmission)
The unit interval is the minimum time interval between condition changes of a data transmission signal, also known as the symbol duration time....
.