ISO/IEC 1864:1992 PDF

Name: ISO/IEC 1864:1992 — Information technology — Unrecorded 12,7 mm (0,5 in) wide magnetic tape for information interchange — 32 ftpmm (800 ftpi), NRZ1, 126 ftpmm (3 200 ftpi) phase encoded and 356 ftpmm (9 042 ftpi), NRZ1
SKU: ISO/IEC 1864:1992
Price: 25 EUR
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Information technology — Unrecorded 12,7 mm (0,5 in) wide magnetic tape for information interchange — 32 ftpmm (800 ftpi), NRZ1, 126 ftpmm (3 200 ftpi) phase encoded and 356 ftpmm (9 042 ftpi), NRZ1

Название (английский):

ISO/IEC 1864:1992

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 15
Дата публикации:: 11 июня 1992 г.
Издание:: ISO/IEC IS 1864 edition 4 version 1
ICS:: 35.220.22

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Язык документа:

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Цена:225 €

Описание (английский):

Specifies the characteristics of the magnetic tape with reel, to enable magnetic and mechanical interchangeability of such tape between information processing systems.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO/IEC 1864:1992 defines the physical and magnetic characteristics of unrecorded 12.7 mm (0.5 in) wide magnetic tape on reel for digital information interchange. It covers three physical recording densities - 32 ftpmm (800 ftpi) and 356 ftpmm (9 042 ftpi) using NRZI, and 126 ftpmm (3 200 ftpi) using phase encoding - and establishes test methods, environmental conditions, and interchange requirements to ensure magnetic and mechanical compatibility between information processing systems.

Key topics and requirements

Tape construction

Base material: oriented polyethylene terephthalate (PET) film or equivalent.
Total thickness: 0.048 mm ± 0.008 mm; base thickness nominal 0.038 mm.
Coating thickness: ≤ 0.015 mm; magnetic coating on one side.

Dimensions and winding

Width: 12.7 mm ± 0.0004 in.
Normal minimum length: 732 m (2 400 ft) splice-free (shorter lengths must be stated).
Wind with magnetic surface toward reel hub, clockwise when viewed from front; winding tension 2 N to 3.6 N.
E value (flange overhang): minimum 3.2 mm; special range for self-loading cartridges.

Recording densities & encoding

Supported physical recording densities: 32, 126, 356 ftpmm (800, 3 200, 9 042 ftpi).
Encoding: NRZI at 32 and 356 ftpmm; Phase encoding at 126 ftpmm.

Magnetic reference & calibration

Defines Standard Reference Amplitude (SRA), Reference Field and Standard Reference Current.
Master and Secondary Standard Reference Tapes (NIST SRM 3200 and SRM 6250) for traceability.

Performance & tests

Typical field tolerances per density (+20% at 32 ftpmm, +15% at 126 ftpmm, +10% at 356 ftpmm).
Average Signal Amplitude readback tolerances relative to SRA.
Missing/extra pulse tests, ease-of-erasure after DC erasure, and signal uniformity.
Mechanical properties: elastoplastic elongation limits, longitudinal curvature (minimum radius), and tape wind behavior.

Markers, reflectivity & electrical properties

BOT and EOT reflective markers positioning, size and reflectivity (marker ≥ 90% of aluminium reference).
Tape backing reflectivity ≤ 30% of reference; magnetic surface resistance range 5×10^5 Ω to 5×10^8 Ω.

Applications and users

Manufacturers of magnetic tape media and self-loading cartridges.

Tape drive and legacy data-storage equipment designers and integrators.

Test labs and QA teams validating tape supply for archival, backup and interchange.

Organizations preserving interoperability of legacy tape formats that use 12.7 mm (0.5 in) magnetic tape, NRZI and phase-encoded recordings.

Related standards

ISO 1863, ISO/IEC 3788, ISO 5652 (track formats and test patterns)

ISO 6098 (self-loading cartridges)

ISO 468, ISO 209-1 (surface roughness, aluminium reference)

NIST SRM references (SRM 3200, SRM 6250) for master reference tapes

Keywords: ISO/IEC 1864:1992, magnetic tape, 12.7 mm, NRZI, phase encoded, 32 ftpmm, 126 ftpmm, 356 ftpmm, tape interchange, SRA, NIST.

ISO/IEC 1864:1992 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications and users

Related standards

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