Automatic baud rate detection
Encyclopedia
Automatic baud rate detection (ABR, autobaud) refers to the process by which a receiving device (such as a modem
) determines the speed, code level, and stop bits of incoming data by examining the first character
, usually a preselected sign-on character (syncword
). ABR allows the receiving device to accept data from a variety of transmitting devices operating at different speeds without needing to establish data rates in advance.
Modem
A modem is a device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information. The goal is to produce a signal that can be transmitted easily and decoded to reproduce the original digital data...
) determines the speed, code level, and stop bits of incoming data by examining the first character
Character (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....
, usually a preselected sign-on character (syncword
Syncword
In computer networks, a syncword, sync character or preamble is used to synchronize a transmission by indicating the end of header information and the start of data.-Examples:For example an audio receiver is receiving a bit stream of data...
). ABR allows the receiving device to accept data from a variety of transmitting devices operating at different speeds without needing to establish data rates in advance.