SIS SS 63 67 21-1984 信息处理．信息交换的3，81毫米（0.150的）磁带盒在4 cpmm （100cpi），相位编码在63 ftpmm （1600 ftpi）

标准号：SIS SS 63 67 21-1984
中文标准名称：信息处理．信息交换的3，81毫米（0.150的）磁带盒在4 cpmm （100cpi），相位编码在63 ftpmm （1600 ftpi）
英文标准名称：Information processing - Information interchange on 3,81 mm (0.150 in) magnetic tape cassette at 4 cpmm (100 cpi), phase encoded at 63 ftpmm (1600 ftpi)
发布日期：1984/6/25 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：This International Standard specifies the characteristics of a 3,81 mm (0.150 in) magnetic tape cassette to provide data in-terchange and physical interchangeability between information processing systems utilizing the ISO 7-bit coded character set (see ISO 646) and, where required, its extensions (see ISO 2022). The cassette is of the twin hub coplanar type, load-ed with a 3,81 mm (0.150 in) wide magnetic tape for digital recording using the 31,5 bits per mm (800 bpi) phase encoding method. The direction of magnetization is in the longitudinal direction of the tape.NOTES1 Numeric values in the SI and/or Imperial measurement system in this International Standard may have been rounded, and are therefore consistent with, but not exactly equal to each other. Either system may ^e used, but the two should be neither intermixed nor converted. The original design was made using the metric measurement system.2 Throughout the remainder of this International Standard for the sake of simplicity the recording density is stated as 32 bpmm 1800 bpi) nominal.This International Standard applies to cassettes and data used for interchange. Where it applies for testing only, this is specifically stated.