meaning of bathtub curve

1. bathtub curve Common term for the curve resembling an end-to-end section of one of those claw-footed antique bathtubs that describes the expected failure rate of electronics with time: initially high, dropping to near 0 for most of the systems lifetime, then rising again as it "tires out". See also burn-in period, infant mortality. [Jargon File] baud unit> /bawd/ plural "baud" The unit in which the information carrying capacity or "signalling rate" of a communication channel is measured. One baud is one symbol state-transition or level-transition per second. This coincides with bits per second only for two-level modulation with no framing or stop bits. A symbol is a unique state of the communication channel, distinguishable by the receiver from all other possible states. For example, it may be one of two voltage levels on a wire for a direct digital connection or it might be the phase or frequency of a carrier. The term "baud" was originally a unit of telegraph signalling speed, set at one Morse code dot per second. Or, more generally, the reciprocal of the duration of the shortest signalling element. It was proposed at the International Telegraph Conference of 1927, and named after J. M. E. Baudot 1845-1903, the French engineer who constructed the first successful teleprinter. The UK PSTN will support a maximum rate of 600 baud but each baud may carry between 1 and 16 bits depending on the coding

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