1、 ANSI INCITS 103-1983 (R2001)(formerly ANSI X3.103-1983 (R2001)for Information Systems -Unrecorded Magnetic Tape Minicassettefor Information Interchange,Coplanar 3.81 mm (0.150 in)ANSI X3.103-1983 American National Standard for Information Systems - Unrecorded Magnetic Tape Minicassette for Informat
2、ion Interchange, Coplanar 3.81 mm (0.150 in) Secretariat Computer and Business Equipment Manufacturers Association Approved May 16, 1983 herican National Standards Institute. Inc AmericanNationalStandardApproval of an American National Standard requires review by ANSI that therequirements for due pr
3、ocess, consensus, and other criteria for approval havebeen met by the standards developer.Consensus is established when, in the judgment of the ANSI Board of StandardsReview, substantial agreement has been reached by directly and materiallyaffected interests. Substantial agreement means much more th
4、an a simplemajority, but not necessarily unanimity. Consensus requires that all views andobjections be considered, and that a concerted effort be made toward theirresolution.The use of American National Standards is completely voluntary; their existencedoes not in any respect preclude anyone, whethe
5、r he has approved the standardsor not, from manufacturing, marketing, purchasing, or using products, processes,or procedures not conforming to the standards.The American National Standards Institute does not develop standards and will inno circumstances give an interpretation of any American Nationa
6、l Standard.Moreover, no person shall have the right or authority to issue an interpretation ofan American National Standard in the name of the American National StandardsInstitute. Requests for interpretations should be addressed to the secretariat orsponsor whose name appears on the title page of t
7、his standard.CAUTION NOTICE: This American National Standard may be revised orwithdrawn at any time. The procedures of the American National StandardsInstitute require that action be taken periodically to reaffirm, revise, or withdrawthis standard. Purchasers of American National Standards may recei
8、ve currentinformation on all standards by calling or writing the American National StandardsInstitute.Published byAmerican National Standards Institute11 West 42nd Street, New York, New York 10036Copyright 1983 by Information Technology Industry Council (ITI)All rights reserved.No part of this publi
9、cation may be reproduced in anyform, in an electronic retrieval system or otherwise,without prior written permission of ITI, 1250 Eye Street NW,Washington, DC 20005.Printed in the United States of AmericaForeword (This Foreword is not part of American National Standard X3.103-1983.) This standard pr
10、esents the minimum requirements for the physical and magnetic inter- changeability of a 3.81-mm (0.1.50-in) -wide magnetic tape minicassette between infor- mation processing systems, communication systems, and associated equipment using American National Standard Code for Information Interchange, (A
11、SCII), ANSI X3.4- 1977. This standard refers solely to a magnetic tape minicassette for digital recording and supports American National Standard for Information Systems - Recorded Magnetic Tape Minicassette for Information Interchange, Coplanar 3.81 mm (0.150 in), Phase En- coded, ANSI X3.104-1983.
12、 The X3B5 Technical Committee on Magnetic Tape Cassettes, which developed this stan- dard, consists of a group of experienced and qualified specialists on the recording of digi- tal information on magnetic tape. In the development of this standard, careful considera- tion was given to current practi
13、ces, existing equipment and supplies, and the broadest possible acceptance, and to providing a basis for future improvement in the use of the medium. Suggestions for improvement of this standard will be welcome. They should be sent to the Computer and Business Equipment Manufacturers Association, 3
14、11 First Street, NW, Suite 500, Washington, D.C. 2000 1. This standard was processed and approval for submittal to ANSI by American National Standards Committee on Information Processing Systems, X3. Committee approval of the standard does not necessarily imply that all committee members voted for i
15、ts ap- proval. At the time it approved this standard, the X3 Committee had the following members: Edward Lohse, Chair William Rinehuls, Vice-Chair Catherine A. Kachurik, Administrative Secretary Organization Represented Name of Representative American Library Association. _ . . . . . . . . . . . . .
16、 . . . . . . . . . . . .Paul Peters American Nuclear Society . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Geraldine C. Main D. R. Vondy (Alt) AMP Incorporated . . . . . . . . . . . . _ . . . . . . . . . . . . . . . . . . . . .Patrick E. Lannan C. Brill (Ah) Association for Computing Mach
17、inery . . . . . . . . . . . . . . . . . . . . .J. A. N. Lee Pat Skelly (Alt) Association of American Railroads. . . . . . . . . . . . . . . . . . . . . . . .R. A. Petrash Association of Computer Users . . . . . . . . . . . . . . . . . . . . . . . .Hillel Segal Thomas Kurihara (Alt) Association of th
18、e Institute for Certification of Computer Professionals . . . Ardyn E. Dubnow Joseph A. Federici (Alt) Burroughs Corporation. . . . _ . . . . . . . . . . . . _ . . . . . . . . . . .Ira R. Purchis Jerrold S. Foley (Ah) . Control Data Corporation . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19、 . . .Charles E. Cooper Keith Lucke (Alt) Data General Corporation . . . . . . . . . . . . . . . . _ . . . . . . . . . . . . .Steven W. Weingart Anthony M. Goschalk (Alt) Data Processing Management Association . . . . . . . . . . . . . . . . . . . . .Ardyn E. Dubnow Robert A. Hoadley (Alt) Digital E
20、quipment Computer Users Society . . _ . . _ . . . . . . . . . . . . . . .James Hodges John R. Barr (Alt) Digital Equipment Corporation _ . . . . . . . . . . . . . . . . . . . _ . . . . . .Lois C. Frampton Gary S. Robinson (Alt) Exxon Office Systems . . . . . . . . . . . . . . . . . . . . . . . . . .
21、 . . . . . .Robert Greenblatt Richard Joyce (Alt) General Services Administration . . . . . . . . . . . . . . . . . . . . . . . . .William C. Rinehuls Donald J. Page (Alt) GUIDE International. . . . . . . . . . . . . . . . . . . . . . . . . .Frank Kirshenbaum Leland Milligan (Alt) Harris Corporation
22、 . . . . . . . . . . . . . . . . . . . . . . . . . Sam Mathan David Abmayr (Ah) Hewlett-Packard. . . . . . . . . . . . . . . . . . . . . . . . . . . . .Donald C. Loughry Organization Represented Honeywell Information Systems . . . IBM Corporation . . . . . . . . . . IEEE Communications Society . . .
23、 IEEE Computer Society . . . . . . . Lawrence Berkeley Laboratory . . . . . . Life Office Management Association . . Moore Business Forms, Inc . . . . National Bureau of Standards. . . . . National Communications System . . . . . NCR Corporation. . . . . . . . . . . . . . . . Perkin-Elmer. . . . . .
24、 . . . . . . . . . Prime Computer. . . . . . . . . . . . . . . Professional Secretaries International. . . . Recognition Technology Users Association . . . . . . . . . . . . . SHARE, Inc. . . . . . . . . . . . . . . . . Sperry . . . . . . . . . . . . . . . . . . . . . . . Telephone Group. . . . . .
25、. . . . . . . . . . . . . . Texas Instruments, Inc. . 3M Company Travelers Insurance Companies, Inc. U.S. Department of Defense. Wang Laboratories, Inc. . Xerox Corporation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Name of Representative .Thomas J. McNamara David M. Taylor (Alt) .Mary Anne Gray J. S. Wilson
27、 (Alt) .Thomas A. Varetoni .Robert Poston Robert S. Stewart (Alt) .James A. Baker Robert J. Harvey (Alt) .James J. Merrick James F. Foley, Jr (Alt) .Delmer H. Oddy .Robert E. Rountree James H. Burrows (Alt) .Marshall L. Cain George W. White (Alt) .Thomas W Kern A Raymond Daniels (Alt) .David Luckowi
28、cz James Pisarcik (Ah) .Richard Kramer Winfried A. Burke (Alt) .Jerome Heitman .Herbert F. Schantz G. W. Wetzel (AR) -_ .Thomas B. Steel Daniel Schuster (Alt) Marvin W. Bass Charles D. Card (Alt) .Henry L. Marchese Stuart H. Garland (Alt) Alvro E. Herron (Ah) .Presley Smith Richard Trow, Jr (Alt) .R
29、. C. Smith .Joseph T. Brophy (AR) .William LaPlant Belkis Leong-Hong (Alt) .Marsha Hayek .John L. Wheeler Arthur R. Machell (AIt) Technical Committee X3B5 on Magnetic Tape, Cassettes, and Cartridges, which devel- oped this standard, had the following members: Richard Steinbrenner, Chair Edward S. Sk
30、alko, Vice-Chair Arthur Anderson Bruce Anderson Michael Hogan, International Representative Robert E. Arko Rene Baus. Jr George Bowers William Buchan Sam Cheatham Fred Ciechowski Donald Clapp Mil Cochran Jack Davis Michael Deese Mario Difede Don Elderson R. J Esboldt Anthony G. Fairfield Noel Leifer
31、 Donald F. Lynch Bruce Manildi Michael Marchese William P. Mealey William R. Miller David G. Osborn William B. Poland Joseph Pomian Don Rasmussen Noel Richardson Howard Robinson Arnold Roccati John Rooks Herbert Sallet Dave Sheppard Ray Smith Vern Thompson Daniel J. Wasser Robert E. Wolff Proposals
32、developed by an American National Standards Technical Committee are the re- sult of individual effort, although members are variously affiliated. Contents SECTION PAGE 1. Scope and Introduction 6 1.1 Scope . 6 1.2 Introduction 6 2. Definitions. 6 3. Environment . 7 3.1 Testing Environment . 7 3.2 Op
33、erating Environment . 7 3.3 Transportation and Storage Environment. . 7 3.4 Transporation. . 7 4. Characteristics of Tape. 8 4.1 General. . 8 4.2 Mechanical Properties 8 4.3 Tests of Magnetic Properties 9 4.4 Electrical Surface Resistance. . 9 5. Minicassettes . 9 5.1 Identification of Minicassette
34、Sides. . 9 5.2 Mechanical Characteristics . 10 5.3 Basic Specifications. . 10 5.4 Labeling of Minicassettes 11 5.5 Magnetic Properties of the Minicassette Housing . 11 5.6 BOT/EOT Light Path. 11 6. Track Location and Dimensions. 11 Figures Figure 1 Minicassette Dimensions . 12 Figure 2 Usable Record
35、ing Area 14 Figure 3 Guide Position of Tape 15 Figure 4 Light Sensing Configuration . 16 Appendixes Appendix A Measurement of Light Transmittance 17 Figures Figure Al Device for Measurement of Light Transmittance. 18 Figure A2 Measuring Mask 19 Appendix B Layer-to-Layer Adhesion. 20 Figure Bl Setup
36、for Layer-to-Layer Adhesion Test 20 American National Standard for Information Systems - Unrecorded Magnetic Tape Minicassette for Information Interchange, Coplanar 3.81 mm (0.150 in) 1. Scope and Introduction 1.1 Scope 1.1.1 This standard for an unrecorded minicas- sette containing 3.81-mm (0.150-m
37、) magnetic tape represents the minimum requirements for mechanical and magnetic interchangeability of the minicassette between information processing systems, communica- tions systems, and associated equipment, using the American National Standard Code for Information Interchange, (ASCII), ANSI X3.4
38、-1977. This standard refers solely to the magnetic tape minicassettes for digital recording. It will support American National Standards for recorded minicassettes. 1.1.2 The minicassette contains two coplanar hubs loaded with 3.81-mm (0.150-m) -wide magnetic tape (see Figure 1). 1.1.3 This standard
39、 as a whole applies to minicas- settes used for data interchange. Sections applicable only to testing of the minicassette are specifically identified. 1.2 Introduction 1.2.1 This standard defines the requirements and supporting test methods necessary to ensure inter- change at acceptable performance
40、 levels. It is distinct from a specification in that it delineates a minimum of restrictions consistent with compatibility in interchange transactions. 1.2.2 The performance levels contained in this stan- dard represent the minimum acceptable levels of per- formance for interchange purposes. They, t
41、herefore, represent the performance levels that the interchanged items should meet or surpass during their useful life and thus define end-of-life criteria for interchange pur- poses. The performance levels in this standard are not intended to be employed as substitutes for purchase specifications.
42、1.2.3 Wherever feasible, quantitative performance levels that must be met or exceeded in order to comply with this standard are given. In all cases, including those in which quantitative limits for requirements falling within the scope of this standard are not stated but are left to agreement betwee
43、n interchange parties, standard test methods and measurement procedures shall be used to determine such quantities. 1.2.4 SI units are the original dimensions in this standard. Conversions of tolerance dimensions from SI units to customary U.S. engineering units (similar to British Imperial Units) h
44、ave been done in this standard according to Method A of Toleranced Dimensions - Conversion from Inches into Millimeters and Vice Versa, IS0 370-1975, except as noted. Method A should be used for economy unless a requirement for absolute assurance of a fit justifies use of Method B. In the national s
45、tandards of IS0 member nations, additional rounding may be done to produce “pre- ferred” values. These values should lie within or close to the original tolerance ranges. 1.2.5 Except as indicated in 1.2.3, interchange parties complying with the applicable standards should be able to achieve compati
46、bility without need for addi- tional exchange of technical information. 2. Definitions average signal amplitude. The average peak-to-peak value of the signal output measured over at least 4000 flux transitions. erasing field. A unidirectional field of sufficient strength to remove the signals from t
47、he tape. flux transition position. That point exhibiting the maximum free space flux density normal to the tape surface. 1 Copies are available from the American National Standards Institute, Inc. 6 AMERICAN NATIONAL STANDARD X3.103-1983 in contact. An operating condition in which the mag- netic sur
48、face of a tape is in physical contact with a magnetic head. leaders. Those nonmagnetic transparent tapes joined to each end of the magnetic tape, for reasons for strength and convenience. magnetic tape. A tape that accepts and retains mag- netic signals intended for input/output and storage purposes
49、 of information processing and associated systems. physical recording density. The number of recorded flux transitions per unit length of track, usually ex- pressed in flux transitions per millimeter (ftpmm) or flux transitions per inch (ftpi). print-through. Any unwanted signals induced in one layer of tape by the field of a recorded signal in an adjacent layer or layers. reference field. The minimum field that, when applied to the Signal Amplitude Reference Minicassette, causes a signal output equal to 95% of the maximum signal output at the specified test recording density (see 4.3). r
