欢迎来到麦多课文档分享! | 帮助中心 海量文档,免费浏览,给你所需,享你所想!
麦多课文档分享
全部分类
  • 标准规范>
  • 教学课件>
  • 考试资料>
  • 办公文档>
  • 学术论文>
  • 行业资料>
  • 易语言源码>
  • ImageVerifierCode 换一换
    首页 麦多课文档分享 > 资源分类 > PDF文档下载
    分享到微信 分享到微博 分享到QQ空间

    BS ISO IEC 10994-1992 Information technology - Data interchange on 90 mm flexible disk cartridges using modified frequency modulation recording at 31 831 ftprad on 80 trac.pdf

    • 资源ID:396212       资源大小:2MB        全文页数:54页
    • 资源格式: PDF        下载积分:10000积分
    快捷下载 游客一键下载
    账号登录下载
    微信登录下载
    二维码
    微信扫一扫登录
    下载资源需要10000积分(如需开发票,请勿充值!)
    邮箱/手机:
    温馨提示:
    如需开发票,请勿充值!快捷下载时,用户名和密码都是您填写的邮箱或者手机号,方便查询和重复下载(系统自动生成)。
    如需开发票,请勿充值!如填写123,账号就是123,密码也是123。
    支付方式: 支付宝扫码支付    微信扫码支付   
    验证码:   换一换

    加入VIP,交流精品资源
     
    账号:
    密码:
    验证码:   换一换
      忘记密码?
        
    友情提示
    2、PDF文件下载后,可能会被浏览器默认打开,此种情况可以点击浏览器菜单,保存网页到桌面,就可以正常下载了。
    3、本站不支持迅雷下载,请使用电脑自带的IE浏览器,或者360浏览器、谷歌浏览器下载即可。
    4、本站资源下载后的文档和图纸-无水印,预览文档经过压缩,下载后原文更清晰。
    5、试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓。

    BS ISO IEC 10994-1992 Information technology - Data interchange on 90 mm flexible disk cartridges using modified frequency modulation recording at 31 831 ftprad on 80 trac.pdf

    1、BSI BS*ISO/IEC 1Oe1L) 92 3624669 03LL9L3 33T BRITISH STANDARD Implementation of ISO/IEC 10994 : 1992 Information technology - Data interchange on 90 rnrn flexible disk cartridges using modified frequency modulation recording at 31 831 ftprad on 80 tracks on each side - IS0 Type 303 UDC 81.387.634 BS

    2、 ISO/IEC 10994 : 1992 BSI BS*ISO/IEC LO994 92 Lb24669 03L19L4 276 BS ISO/IEC 10994 : 1992 National foreword This British Standard reproduces verbatim ISO/IEC 10994 : 1992 and implements it as the UK national standard. This British Standard is published under the direction of the Information Systems

    3、Technology Standards Policy Committee whose Technical Committee IST/4 has the responsibility to: - aid enquirers to understand the text; - present to the responsible international committee any enquiries on interpretation, or proposals for change, and keep UK interests informed; - monitor related in

    4、ternational and European developments and promulgate them in the UK. NmE. International and European Standards, as well as overseas standards, are available from BSI Sales Department, BSI, Linford Wood, Milton Keynes, MK14 6LE. Compliance with a British Standard does not of itself confer immunity fr

    5、om legal obligations. BSI BS*ISO/IEC 1099Y 92 m lb24bb7 0311935 102 m I NT E R NAT I O NA L STANDARD ISO/IEC First edition 1992-06-01 Information technology - Data interchange on 90 mm flexible disk cartridges using modified frequency modulation recording at 31 831 ftprad on 80 tracks on each side -

    6、 IS0 Type 303 Technologies de linformation - change de donnes sur cartouche disquette de 90 mm utilisant un enregistrement a modulation de frquence modifie 31 831 ftprad, 80 pistes par face - IS0 Type 303 ISO/IEC 10994:1992 (E) Con tents Section 1 - General 1 2 3 4 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.

    7、9 4.10 4.11 4.12 4.13 4.14 4.15 4.16 4.17 4.18 4.19 4.20 4.21 4.22 5 5. I 5.2 5.3 scope Conformance Normative references Definitions Average Signal Amplitude direction of rotation disk eraseability formatting hub in-contact Index initialization line of access liner Master Standard Reference Flexible

    8、 Disk Cartridge Reference Erase Field Reference Field Secondary Standard Reference Flexible Disk Cartridge shutter Side Standard Reference Amplitude Test Erase Current Test Recordi ng Current Typical Field General description Drawings Main elements Description case Section 2 - Environments, mechanic

    9、al and physical characteristics 6 General requirements 6.1 Environment and transportation 6.1.1 Testing environment 6.1.2 Operating environment 6.1.3 Storage environment 6.1.4 Transportation O ISOIIEC 1992 Ail rights reserved. No part of this publication may be reproduced or utilized in any form or

    10、by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. Printed In Switzerland ISO/IEC Copyright Office Case Postale 56 CH-I211 GenBve 20 Switzerland II Page 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 3 BSI BS*P

    11、SO/IEC 10994 92 I Lb24bb9 03Ll1917 T85 ISO/LEC 10994:1992 (E) 6.2 Materials 6.2.1 CaSe 6.2.2 Liner 6.2.3 Disk 6.2.4 Hub 7 Dimensional characteristics 7.1 Case 7.1.1 Shape 7.1.2 Thick ness 7.1.3 Hub access hole 7.1.4 Locating holes 7.1.5 Label area 7.1.6 Head windows 7.1.7 Write-inhibit hole 7.1.8 id

    12、entification hole 7.1.9 7.1.10 Shutter 7.2 Liner 7.3 Disk 7.3.1 Diameter 7.3.2 Thickness 7.4 Hub 7.4.1 Dimensions 7.4.2 Hub orientation holes 7.5 Optional handling notches 7.6 7.7 Compliance 8 Physical characteristics 8.1 Flammability 8.2 8.3 8.4 Torque 8.4.1 Starting torque 8.4.2 Seetion 3 - Unreco

    13、rded flexible disk cartridge 9 Magnetic characteristics 9.1 Recording area 9.2 Track geometry 9.2.1 Number of tracks 9.2.2 Width of tracks 9.2.3 Track location 9.2.4 Track number 9.3 Functional testing 9.3.1 Surface tests 9.3.2 Track quality tests 9.3.3 Rejection criterion Section 4 - Recording meth

    14、od and track format 10 General requirements 10.1 Mode of recording 10.2 Profile of the shutter edge of the case Interface between cartridge and drive Coefficient of linear thermal expansion of the disk Coefficient of linear hygroscopic expansion of the disk Running torque without heads loaded Track

    15、location tolerance of the recorded flexible disk cartridge 5 5 5 5 5 5 5 5 5 6 6 6 7 7 7 8 8 8 9 9 9 9 9 9 10 io 10 11 11 11 11 11 11 11 11 11 11 11 11 11 11 12 12 12 13 14 14 14 14 14 iii BSI BS*ISO/IEC LO994 92 Lb24bb9 031L91B 911 D ISODEC 1994:1992 (E) 10.3 10.4 10.5 10.6 10.7 10.8 10.9 10.10 10.

    16、1 1 10.12 10.13 11 11.1 11.2 11.2.1 11.2.2 11.3 11.4 i 1.4.1 11.4.2 1 1.4.3 11.5 11.6 12 12.1 12.2 Recording offset angle Density of recording Flux transition spacing Average Signal Amplitude Byte Sector Cy I i nder Cylinder number Data capacity of a track Hexadecimal notation Error Detection Charac

    17、ters (EDC) Track layout Index Gap Sector Identifier Identifier Mark Address Identifier Identifier Gap Data Block Data Mark Data Field EDC Data Block Gap Track Gap Coded representation of data Byte coding Bit coding Annexes A - Test for compliance B - Measurement of light transmittance C - Method for

    18、 measuring the effective track width D - Procedure and equipment for measuring flux transition spacing E - Data separators for decoding MFM recording F - EDC implementation G - Cartridge distortion test gauge H - Method for measuring peak shift J - Head and read amplifier for functional testing K -

    19、Procedure for determining test recording current and test erase current 14 15 15 16 16 16 16 16 16 16 17 17 17 17 17 18 18 18 19 19 19 19 19 19 19 20 26 28 31 32 34 35 36 37 41 43 iv BSI BS*ISO/IEC 10994 92 m 3b24bb9 0311919 858 m ISO/IEC 10994:1992 (E) Foreword IS0 (the International Organization f

    20、or Standardization) and IEC (the international Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of IS0 or IEC participate in the development of International Standards through technical committees established by the respective o

    21、rganization to deal with particular fields of technical activity. IS0 and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non- governmental, in liaison with IS0 and IEC, also take part in the work. In the field of information tec

    22、hnology, IS0 and IEC have established a joint technical committee, ISOiEC JTCI. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies cast

    23、ing a vote. International Standard ISO/IEC 10994 was prepared by the European Computer Manufacturers Association (as Standard ECMA-147) and was adopted, under a special “fast-track procedure“, by Joint Technical Committee ISODEC JTCI, Information technology, in parallel with its approval by national

    24、 bodies of IS0 and IEC. Annexes A to D and G to K form an integral part of this International Standard. Annexes E and F are for information only. V BSI BS*ISO/IEC 10994 92 E 1624bb9 0311920 57T I INTERNATIONAL STANDARD ISO/IEC 10994:1992 (E) Information technology - Data interchange on 90 mm flexibl

    25、e disk cartridges using modified frequency modulation recording at 31 831 ftprad on 80 tracks on each side - IS0 Type 303 Section 1 - General 1 scope This International Standard specifies the characteristics of 90 mm flexible disk cartridges recorded at 31 831 ftprad using modified frequency modulat

    26、ion recording, on 80 tracks on each side. Such flexible disk cartridges are identified as IS0 Type 303. It specifies the mechanical, physical and magnetic characteristics of the cartridge, so as to provide physical inter- changeability between data processing systems. It also specifies the method of

    27、 recording, the quality of the recorded signals, the track layout and the track format. Together with IS0 9293, this International Standard piovides for full data interchange between data processing systems. 2 Conformance A 90 mm flexible disk cartridge is in conformance with this International Stan

    28、dard if it meets all mandatory requirements specified herein. 3 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards ar

    29、e subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 683-13:

    30、1986 - Heat-treatable steels, alloy steels and free-cutting steels - Part 13: Wrought stainless steels IS0 8860-1:1987 - informariori processing - Data interchange on 90 mm (3.5 in) flexible disk cartridges using modified frequency modulation recording at 7 958 ftprad on 80 tracks on each si - Figur

    31、e 9 - Figure 10 shows the disk with hub; - Figure 11 5.2 Main elements The main elements of the flexible disk cartridge are shows side O and en.arged cross-sections through the .ation holes; shows at a larger scale the upper part of Side O without shutter; shows the interface between the cartridge a

    32、nd the drive. - the disk, - the liner, - the case. 5.3 Description The cartridge is of a substantially square form. It includes a central hole on one side, a head window on both sides, an identification hole and a write-inhibit hole. The liner is provided between the case and the disk. It comprises two layers of material between which the disk lies. The disk has a central hole with a metal hub attached.


    注意事项

    本文(BS ISO IEC 10994-1992 Information technology - Data interchange on 90 mm flexible disk cartridges using modified frequency modulation recording at 31 831 ftprad on 80 trac.pdf)为本站会员(roleaisle130)主动上传,麦多课文档分享仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知麦多课文档分享(点击联系客服),我们立即给予删除!




    关于我们 - 网站声明 - 网站地图 - 资源地图 - 友情链接 - 网站客服 - 联系我们

    copyright@ 2008-2019 麦多课文库(www.mydoc123.com)网站版权所有
    备案/许可证编号:苏ICP备17064731号-1 

    收起
    展开