ANSI INCITS 22-1983 Information Systems - Recorded Magnetic Tape for Information Interchange (800 CPI NRZI).pdf

1、ANSI INCITS 22-1983 (R2006)(formerly ANSI X3.22-1983 (R2001)for Information Systems -Recorded Magnetic Tape forInformation Interchange(800 CPI, NRZI)Stabilized as INCITS 22-1983S2011AmericanNationalStandardApproval of an American National Standard requires review by ANSI that therequirements for due

2、 process, 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

3、 than 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, whe

4、ther 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 Nati

5、onal 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 o

6、f this 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 re

7、ceive 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 pu

8、blication 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 AmericaANSI X3.22-1983 Revision of ANSI X3.22-1973 American National Standard for Information System

9、s - Recorded Magnetic Tape for Information Interchange (800 CPI, NRZI) Secretariat Computer and Business Equipment Manufacturers Association Approved August 19, 1983 American National Standards Institute, I nc Foreword (This Foreword is not part of American National Standard X3 22-1983.) This Americ

10、an National Standard presents the technique for recording the code presented in American National Standard Code for Information Interchange, (ASCII), ANSI X3.4- 1977, on magnetic tape at 800 characters per inch (CPI) using nonreturn-to-zero - change on ones (NRZI) recording techniques. It is one of

11、a series of standards implement- ing the ASCII in media. Related standards specify higher densities and define more fully the physical and mag- netic properties of magnetic tape, and specify a standard record format and labels Work is continuing on definitions, higher performance, and future require

12、ments Technical Committee X3B1, which developed this document, consists of a group of ex- perienced and qualified specialists on recording of digital information on magnetic tape. In the development of this standard, careful consideration was given to current practices, existing equipment and suppli

13、es, and the broadest possible acceptance, while providing a basis for future improvement in the use of the medium. This standard is a revision of ANSI X3.22-1973 and was approved as an American Na- tional Standard by ANSI on August 19, 1983. Suggestions for improvement of this standard will be welco

14、me They should be sent to the Computer and Business Equipment Manufacturers Association, 3 11 First Street, NW, Suite 500, Washington, D C. 20001 This standard was processed and approved for submittal to ANSI by American National Standards Committee on Information Processing Systems, X3. Committee a

15、pproval of the standard does not necessarily imply that all committee members voted for its ap- proval At the time it approved this standard, the X3 Committee had the following members. Edward Lohse, Chair William C Rinehuls, Vice-Chair Catherine A Kachurik, Administrative Secretary Organization Rep

16、resented American Library Association. . American Nuclear Society AMP Incorporated . Association for Computing Machinery Association of American Railroads . Association of Computer Users . Association of the Institute for Certification of Computer Professionals. . Burroughs Corporation. Control Data

17、 Corporation . Data General Corporation . Data Processing Management Association . Digital Equipment Computer Users Society . Digital Equipment Corporation Exxon Office Systems . . General Services Administration . Name of Representative .Paul Peters Geraldine C Main D. R Vondy (Alt) .Patrick E Lann

18、an C. Brill (Alt) J. A. N Lee Pat Skelly (Alt) .R A. Petrash .Hillel Segal Thomas M. Kurihara (Alt) .Thomas M. Kurihara Ardyn E Dubnow (Alt) Ira R. Purchis Jerrold S. Foley (Alt) Charles E. Cooper Keith Lucke (Alt) Steven W. Weingart Howell A Richards (Alt) Ardyn E Dubnow Robert A. Hoadley (Alt) .Ja

19、mes Hodges John R. Barr (Alt) .Lois C. Frampton Gary S Robinson (Alt) .Robert Greenblatt Richard Joyce (Alt) .William C. Rinehuls Donald J. Page (Alt) GUIDE International. . . . . . . , . . . . . . . . . . .Frank Kirshenbaum Leland Milligan (Alt) Harris Corporation . . . . . . . . . . . . . . . . .

20、 . . . . . . . . .Sam Mathan David Abmayr (Alt) Organization Represented Name of Representative Hewlett-Packard. . . . . . . . . . . . . . . . . . . . . . . . .Donald C. Loughry Honeywell Information Systems . . . . . . . . . . . . . . . . . . . . . Thomas J. McNamara David M. Taylor (Alt) IBM Corp

21、oration . . . . . . . . . . . . . . . . . . . . . . . . . .Mary Anne Gray J. S. Wilson (Alt) IEEE Communications Society . . . . . . . . . , . . . . . . . . . . . . . .Thomas A. Varetoni IEEE Computer Society . . . . . . . . . . . . . . . . . . . . . . . .Robert Poston Robert S. Stewart (Alt) Lawren

22、ce Berkeley Laboratory . . . . . . . . . . . . . . . . . . . . . . . .James A Baker Robert J. Harvey (Ah) Life Office Management Association . . . . . . . . . . . . . . . . James J Merrick James F. Foley, Jr (Alt) Moore Business Forms, Inc . . . . . . . . . . . . . . . . . . . . . . . . . . . Delmer

23、 H Oddy National Bureau of Standards . . . . . . . . . . . . . . . . . . . . . . Robert E. Rountree James H. Burrows (Alt) National Communications System . . . . . . . . . . . . . . . . . Marshall L. Cain George W. White (Alt) NCR Corporation. . . . . . . . . . . . . . . . . . . . . . . . . .Thomas

24、W. Kern A. Raymond Daniels (Ah) Perkin-Elmer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . James Pisarcik Prime Computer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Melvin L Cassio Winfried A Burke (Alt) Recognition Technology Users Association . . . . . . . . . . . . . . .

25、Herbert F. Schantz G W Wetzel (Alt) SHARE,Inc . . . . . . . . . . . . Thomas B Steel Daniel Schuster (Alt) Sperry Corporation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Marvin W Bass Charles D Card (Ah) Telephone Group. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Henry

26、 L. Marchese Stuart H. Garland (Alt) Alvro E. Herron (Alt) Texas Instruments, Inc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Presley Smith Richard F. Trow, Jr (Alt) 3M Company . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .R. C. Smith Travelers Insurance Companies,

27、 Inc. . . . . . . _ . . . . . . . . . . .Joseph T. Brophy U.S. Department of Defense. . . . . . . . . . . . . . . . . . . . . . . . .William LaPlant Belkis Leong-Hong (Ah) VIM. . . . . . . . . . . . . . . . . . . . . . . . . . . .Chris Tanner Joe Fitzgerald (Alt) Wang Laboratories, Inc. . . . . . .

28、 . . . . . . . . . . . . . . . . . . . .Marsha Hayek Xerox Corporation . . . . . . . . . . . . . . . . . . . . . .John L. Wheeler Arthur R. Machell (Alt) Technical Committee X3Bl on Magnetic Tape, which revised this standard, had the fol- lowing members. Joseph J. Zajaczkowski, Chair Michael Deese,

29、 Vice-Chair M. H. Lohrenz, Secretary Michael Honan. International w , Representative Arthur Anderson Henry Adair (AR) A. Ching (Alt) Jeff Menkes (Alt) Donald S. Elderson Art Evans Herbert Schantz (Alt) J. Fiori James Smith (Ah) S. E. Grab1 Robert McGregor (Ah) Dick Harlan A. Pattillo (Ah) C. Edmond

30、Holler Kyriacos Joannou John J. Fleming (Alt) Melvin R. Kaiser George Klechefsky William A. Bernett (Ah) Michael A, Marchese Joseph Bullock (Alt) W. P. Mealey William B. Poland, Jr Robert McKenna (Alt) Joseph Pomian Hakan Hemdal (Alt) D. 0. Rasmussen R. Bartholomew (Alt) Jerry Resnikoff T. C Lambert

31、 (Alt) Arnold J. Roccati H. Sallet D. G. Osborn (Alt) James Sexton David E. Butz (Alt) A. Sheehan Walter Wuensch (Alt) David Sheppard Richard Silva Anthony Saratora (Alt) Gene Sovereign G. 0. Dunklee (AR) H. J. Tait (Alt) Richard T. Steinbrenner Sam D. Cheatham (Alt) Sidney B. Geller (Alt) M. Richar

32、d Pembroke (Alt) Clyde Roberts (Ah) V. L. Thompson (Alt) Robert S. Woolridge (Alt) Contents SECTION 1. Scope andPurpose . 6 2. Definitions. 6 3. Recording Area Markers. . 7 4. Recording . 7 4.1 Method . 7 4.2 Density of Recording. . 7 4.3 Skew . 7 4.4 Erase . 9 4.5 Standard Reference Amplitude . 9 4

33、6 Signal Amplitude. 9 5. Format . 9 5.1 Track Format. 9 5.2 Track Dimensions 9 5.3 Reference Edge. . 9 5.4 Track Identification. 9 5.5 Block Length . 9 5.6 Density Identification Area. . 9 5.7 Gaps . 9 5.8 TapeMark . 9 5.9 CRC Character . .I1 5.10 LRCCharacter 11 Figures Figure 1 Usable Recording A

34、rea 8 Figure 2 Recording Format (800 CPI) 10 Appendixes Appendix A Design Considerations I 2 Al. Introduction 12 A2. Specification Support 12 A3. Additional Considerations . 14 Appendix B Cyclic Redundancy Check (CRC) Character 14 American National Standard for Information Systems - Recorded Magneti

35、c Tape for Information Interchange (800 WI, NRZI) 1. Scope and Purpose 1.1 This standard provides specifications for format and recording for l/2-inch, 9-track magnetic tape to be used for information interchange among information processing systems, communication systems, and as- sociated equipment

36、 utilizing the American National Standard Code for Information Interchange, (ASCII), ANSI X3.4-1977. This standard deals solely with record- ing on magnetic tape and supports and complements American National Standard for Information Systems - Unrecorded Magnetic Tape for Information Inter- change (

37、9-Track 800 CPI, NRZI; 1600 CPI, PE; and 6250 CPI, GCR), ANSI X3.40-1983, in which the fol- lowing sections are dealt with in detail: general require- ments, definitions, tape physical and magnetic require- ments, and tape reel requirements. Compliance with the standard for unrecorded tape is a requ

38、irement for information interchange. CAUTION NOTICE: The users attention is called to the pos- sibility that compliance with this standard may require use of an invention covered by patent rights. By publication of this standard, no position is taken with re- spect to the validity of this claim or o

39、f any patent rights in connection therewith. The patent holder has, however, filed a statement of willingness to grant a license under these rights on reasonable and nondiscriminatory terms and conditions to applicants desiring to obtain such a license. Details may be ob- tained from the publisher.

40、No representation or warranty is made or implied that this is the only license that may be required to avoid infringement in the use of this standard. 1.2 This standard defines the requirements and sup- porting test methods necessary to ensure interchange at acceptable performance levels. It is dist

41、inct from a specification in that it delineates a minimum of restric- tions consistent with compatibility in interchange transactions. 1.3 The performance levels contained in this standard represent the minimum acceptable levels of performance for interchange purposes. They, therefore, represent the

42、 performance levels that the interchanged items should meet or surpass during their useful life and thus define end-of-life criteria for interchange purposes. The performance levels in this standard are not intended to be employed as substitutes for purchase specifica- tions. 1.4 Wherever feasible,

43、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 with- in the scope of this standard are not stated but left to agreement between interchange parties, stan

44、dard test methods and measurement procedures shall be used to determine such limits. 1.5 U.S. engineering units are the original dimensions in this standard. Conversions of toleranced dimensions from customary U.S. engineering units (similar to British Imperial Units) to SI units have been incorpora

45、ted in this standard according to Method A as described in American National Standard Metric Practice, ANSI/ IEEE 268-1982, and in Toleranced Dimensions - Con- version from Inches into Millimetres and Vice Versa, IS0 370-1975. Method A, as described in ANSI/IEEE 268-1982, should be used to achieve e

46、conomy unless requirements for absolute assurance of fit justifies use of Method B In the national standards of IS0 member bodies, additional rounding may be done to produce “preferred” values. These values should lie within or close to the original tolerance. 1.6 Except as indicated in 1.4 above, i

47、nterchange parties complying with the applicable standards should be able to achieve compatibility without need for addi- tional exchange of technical information. 2. Definitions amplitude reference tape. The tape used to establish the standard reference amplitude when it is recorded 6 AMERICAN NATI

48、ONAL STANDARD X3.22-1983 with continuous ONES at the density under considera- tion. NOTE: A master standard amplitude reference tape has been established at the National Bureau of Standards (NBS) for the physical recording densities of 800 ftpi (32 ftpmm) and 3200 ftpi (126 ftpmm). Secondary amplitu

49、de reference tapes are available from NBS under the part number SRM 3200. For ordering information contact: Office of Standard Ref- erence Materials, Room B3 11, Chemistry Building, National Bureau of Standards, Washington, D.C. 20234. beginning-of-tape (BOT) marker. A photoreflective marker placed on the tape for the purpose of indicating the beginning of the permissible recording area. block. A group of contiguous recorded characters con- sidered and transported as a unit containing one or more logical records. Blocks are separated by an inter- block gap. cyclic redundancy check (C