DLA A-A-55456 A-1995 DISK FLEXIBLE TWO-SIDED DOUBLE-DENSITY 1 9 TRACKS PER MILLIMETER (TPMM) (48 TRACKS PER INCH (TPI)) 130 MILLIMETERS (MM) (5 25 INCHES))《1 9磁道每毫米(TPMM)(48磁道每英寸)1.pdf

《DLA A-A-55456 A-1995 DISK FLEXIBLE TWO-SIDED DOUBLE-DENSITY 1 9 TRACKS PER MILLIMETER (TPMM) (48 TRACKS PER INCH (TPI)) 130 MILLIMETERS (MM) (5 25 INCHES))《1 9磁道每毫米(TPMM)(48磁道每英寸)1.pdf》由会员分享，可在线阅读，更多相关《DLA A-A-55456 A-1995 DISK FLEXIBLE TWO-SIDED DOUBLE-DENSITY 1 9 TRACKS PER MILLIMETER (TPMM) (48 TRACKS PER INCH (TPI)) 130 MILLIMETERS (MM) (5 25 INCHES))《1 9磁道每毫米(TPMM)(48磁道每英寸)1.pdf（4页珍藏版）》请在麦多课文档分享上搜索。

1、A-A-5545bA W 9999974 0366734 780 W 02 CI NCH - POUND1 A-A-55456A Preformatted for IBM PC/AT, MS DOS 3.1 and higher. 360 kilobytes (Kb) April 17. 1995 SUPERSEDING A-A-55456 November 5, 1993 COMMERCIAL ITEM DESCRIPTION DISK, FLEXIBLE, TUO-SIDED, DOUBLE-DENSITY, 1.9 TRACKS PER MILLIMETER (TM) (48 TRACK

2、S PER INCH (TPI), 130 MILLIMETERS (HII) (5.25 INCHES) The General Services Administration has authorized the use of this comercial item description (CID) for all federal agencies. 1. 130 mn (5.25 inches) flexible disk. Flexible disks covered by this CID are intended for comnercial/industrial applica

3、tions. 2. Nunber (PIN) as shown in the following exanple (see 6.1). SCOPE. This CID covers the general requirements for a two-sided, double-density, 1.9 TPMM (48 TPI), CLASSIFICATIN. This CID uses a classification system which is included in the Part or Identification I AA55456 - CID nunber Dash num

4、ber (see table I) 3. SALIENT CHARACTERISTICS TABLE I. Characteristics I I 1 I AA55456- I Disk format I Minim formatted memory I I I I I l I Unformatted. - o1 I 03 I Preformatteci for MAC. I 3.1 Recording surfaces. This flexible disk shall have two recording surfaces. 3.2 Nunber of tracks. There shal

5、l be 40 discrete concentric data tracks in the recording area for data interchange on each side of this disk. 3.3 Track density. This flexible disk shall have 1.9 TPMM (48 TPI). 3.4 Disk density. unformatted memory. 3.5 Bits per radian (BPR). 3.6 Jacket. This flexible disk shall be double density wi

6、th a minimum of 500 kilobytes (kb) of The BPR for this flexible disk shall be 7,958 BPR. The jacket shall be square with a side 133.35 mn 10.38 mn (5.250 inches 1.015 inch). Beneficial comnents, recomnendations, additions, deletions, clarifications, etc., and any data which may improve this document

7、 should be sent to: 1507 iiilmington Pike, Dayton, OH 45444-5765, or telephone (513) 296-6189, or facsimile (FAX) Defense Electronics Supply Center, ATTN: DESC-ELDM, AMSC N/A DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. FSC 7045 Provided by IHSNot for ResaleNo re

8、production or networking permitted without license from IHS-,-,-A-A-55456A 9999974 OLb6715 617 A-A-55456A 3.7 Jacket thickness. .O75 inch). 3.8 Owratinq surface tenperature. surface in the range from 10C to 51.5OC (40F to 125F) at a relative hunidity of 8 percent to 80 percent. 3.9 Design and constr

9、uction. meet the requirements of ANSI X3.125. 3.10 Used or reconditioned material. reconditioned or is coirprised of used or reconditioned material. 4. QUALITY ASSURANCE PROVISIONS 4.1 product offered meets the salient characteristics of this CID, and that the product conforms to the producers oun d

10、rawings, specifications, standards, and quality assurance practices, and is the same product offered for sale in the corniercial marketplace. The Govermient reserves the right to require proof of such conformance prior to first delivery and thereafter as may be otherwise provided for under the provi

11、sions of the contract. 4.2 Certificate of condiance. submit a DESC certificate of compliance to DESC-ELDM. product meets all the requirements of ANSI X3.125, and all requirements of this CID. certificate of compliance shall accampany all flexible disks supplied to this CID. 4.3 Market acceptability.

12、 quality of the product to be provided under this CID: The jacket thickness shall be 1.397 mn to 1.905 mn (.O55 inch to This flexible disk shall withstand an operating tenperature at its Flexible disks supplied to this CID shall be as specified herein and shall A manufacturer shall not furnish any f

13、lexible disk which is used or Contractor certification. The contractor shall certify and maintain substantiating evidence that the Each contractor desiring to be listed as a suggested source of supply shall This certificate shall state that the contractors In addition, a The following market accepta

14、bility criteria are necessary to docunent the a. The conpeny producing the item mist have been producing a product meeting the requirements of this CID for at least 2 years. The campany nwst have sold 1,000 units meeting this CID in the comnercial marketplace over the past 2 years. b. 5. PACKAGING 5

15、.1 contract or order. 6. NOTES 6.1 m. section 2 for PIN format example. 6.2 Source of docunents. Preservation. packing. and marking. Preservation, packing, and marking shall be as specified in the The PIN should be used for Government purposes to buy comnercial products to this CID. See Other Public

16、ations AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) ANSI X3.125 - Two-sided, Double-Density, Unformatted, 5.25-Inch (130-m), 48-tpi (1,9-TPMM), Flexible Disk Cartridge for 7958 BPR Use - General, Physical, and Magnetic Requi rements. (Applications for copies should be addressed to the American Natio

17、nal Standards Institute, 11 West 42nd Street, New York, NY 10036-8002). (Industry association specifications and standards are generally available for reference from libraries. They are also distributed among technical groups and using Federal agencies.) 6.3 Govermient users. inventory system, conta

18、ct Defense Electronics Supply Center, ATTN: OH 45444-5520, or telephone (513) 296-5625. To acquire information on obtaining these flexible disks from the Government DESC-EOC, 1507 Wilmington Pike, Dayton, 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS

19、-,-,-A-A-55456A _ Vendor comercial PIN CAGE 52327 051111-00234 _- - 6.4 Ordering data. The contract or order should specify the following: a. CID docunent mmber, revision, and CID PIN. b. Quality assurance provisions. c. d. Packaging requirements. 6.5 Suggested sources of su$mly. added as they becom

20、e available. If a bid smple is required. Suggested sources of supply are listed below. Additional sources will be Vendor Vendor comercial comnercial PIN PIN CAGE 55151 CAGE 74712 534010 477501 _ 477501DOS - 477501MAC CID dash n-r AA55456- MlBA2llX 15429-09-EQPQ 54360 _ 15428-09-EQPQ _ - 02 03 Vendor

21、 CAGE nunber OCENP OEGZ7 OTWG7 04833 52327 55151 7471 2 Vendor comercial PIN CAGE 04833 177-0080- 1 Vendor name and address Syncom Technologies, Incorporated 1000 Syncom Drive Mitchell, SD 57301-4767 (800) 843-9862 BASF Corporation Information Systems Division 35 Crosby Drive Bedford, MA 01730-1471

22、(703) 256-7112 Wabash Computer Products, Incorporated 12210 E. 52nd Street Tulsa, OK 74146-6204 (918) 254-9704 Nashua Media, Incorporated DBA Wang Express 57 Daniel Webster Highway Merrimack, NH 03054-4811 (508) 656-8585 Minnesota Mining and MFG Company Data Storage Products Division 3M Center St. P

23、aul, MN 55144-1000 (800) 854-0033 Maxell Corporation of America 22-08 Route 208 Fair Lawn, NJ 07410-2606 (619) 661-6600 Athana, Incorporated 23955 President Avenue Harbor City, CA 90710-1333 (310) 320-4581 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IH

24、S-,-,- A-A-5545bA 7799974 OLbb7L7 49T A-A-55456A 6.6 Changes from previous issue. to the previous issue due to the extensiveness of the changes. Asterisks are not used in this revision to identify changes with respect CIVIL AGENCY COORDINATING ACTIVITY: GSA - KMR PREPARING ACTIVITY: DLA-ES Project 7045-DOI5 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-