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Punched tape or perforated paper tape is a form of data storage device that consists of a long strip of paper through which small holes are punched. It was developed from and was subsequently used alongside punched cards , the difference being that the tape is continuous.
When the operator wanted to insert paper tape, this lever was pulled, and the star wheel retracted from the paper. [3] Wheatstone automatic transmitter diagram. The Wheatstone transmitter read a paper tape (Wheatstone slip) and converted the dot pattern into mark and space symbols on the telegraph line. It worked by two rods alternately rising ...
Baudot developed his first multiplexed telegraph in 1872 [3] [4] and patented it in 1874. [4] [5] In 1876, he changed from a six-bit code to a five-bit code, [4] as suggested by Carl Friedrich Gauss and Wilhelm Weber in 1834, [3] [6] with equal on and off intervals, which allowed for transmission of the Roman alphabet, and included punctuation and control signals.
Digital Audio Tape (DAT or R-DAT) is a signal recording and playback medium developed by Sony and introduced in 1987. [1] In appearance it is similar to a Compact Cassette , using 3.81 mm / 0.15" (commonly referred to as 4 mm) magnetic tape enclosed in a protective shell, but is roughly half the size at 73 mm × 54 mm × 10.5 mm.
Instead of directly transmitting to the line, the keypresses of the operator punched holes in the tape. Each row of holes across the tape had five possible positions to punch, corresponding to the five bits of the Murray code. The tape was then run through a tape reader which generated the code and sent it down the telegraph line.
AMPEX 440 (two-track, four-track) and 16-track MM1000 Scully 280 eight-track recorder using 1 inch (25 mm) tape at the Stax Museum of American Soul Music. Multitrack recording of sound is the process in which sound and other electro-acoustic signals are captured on a recording medium such as magnetic tape, which is divided into two or more audio tracks that run parallel with each other.
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