منابع مشابه
Magnetic Tape Storage
Initially, magnetic tape for data storage was wound on large (10.5 in/26.67 cm) reels. This defacto standard for large computer systems persisted through the late 1980s. Tape cartridges and cassettes were available as early as the mid 1970s and were frequently used with small computer systems. With the introduction of the IBM 3480 cartridge in 1984, large computer systems started to move away f...
متن کاملMagnetic tape recording electrocardiograph.
R ECORDING the electrocardiogram for prolonged intervals presents difficulties from the standpoint of economy and convenience. One 200 foot roll of paper for a direct writing instrument is used in 40 minutes of continuous recording at 25 mm. per second, and reviewing this long electrocardiographic record is a cumbersome procedure. A convenient method of recording electrocardiograms and fied ele...
متن کاملThe IBM 3803/3420 Magnetic Tape Subsystem
The design innovations in the IBM 3803 Tape Control Unit and the IBM 3420 Magnetic Tape Unit are discussed. The new design concepts include a full readback parity check, a system of microprogram control that obtains high operating rates through overlap of channel control and motion control functions, a new phase-error detection system, a modified dual-density recording feature and a new interfa...
متن کاملPunched-Card to Magnetic-Tape Converter
THE principal devices for converting source data to magnetic tape recording for Univac* are the card-to-tape converter and the Unityper. * Unityper is the, logical conversation medium for input of 'otherwise untreated data. Files of punched cards, however, represent to the owner an investment of time and expense in preparing material for other treatment. The card-to-tape converter provides a me...
متن کاملHigh Density Pcm Magnetic Tape Recording
The Bell & Howell Enhanced-NRZ recording reproducing technique for bit packing densities up to 40,000 per track inch is described in this paper. Utilization of the pulse code modulation format of Enhanced-NRZ achieves this high density with a bit error rate of one in ten million. Bell & Howell’s standard VR-3700B instrumentation tape recorder and wideband instrumentation recording tape are used...
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ژورنال
عنوان ژورنال: Kobunshi
سال: 1981
ISSN: 0454-1138,2185-9825
DOI: 10.1295/kobunshi.30.761