Posted: Sun Apr 23, 2006 9:11 pm Post subject: Baud
Baud,
You may also hear the term baud rate used to describe modem speeds. These days, baud rate is an outdated term. In slower modems, baud rate (which measures the number of times the frequency of the analog signal changes per second) was equivalent to the number of bits transmitted per second. In faster modems, however, two or three bits may be transmitted for every frequency change-making bits per second a different and more useful measurement. Nonetheless, if someone says they have a 14400 baud modem, they probably mean a modem that can transmit data at 14.4Kbps.
Technically, baud rate is the number of times per second that the carrier signal value changes state - for example a 1200 bit-per-second modem actually runs at 300 baud, but it moves 4 bits per baud (4 x 300= 1200 bits per second). This is NOT how many bits-per-second the modem can transmit because there may be more than two states to the signal.
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