ISO IEC 12247-1993 Information technology 3 81 mm wide magnetic tape cartridge for information interchange helical scan recording DDS format using 60 m and 90 m.pdf
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1、INTERNATIONAL STANDARD ISO/IEC 12247 First edition 1993-12-15 Information technology - 3,81 mm wide magnetic tape cartridge for information interchange - Helical scan recording - DDS format using 60 m and 90 m length tapes Technologies de /information - Cartouche de bande magndtique de 3,81 mm de la
2、rge pour Itkhange dinformation - Enregistrement par balayage en spirale - Format DDS utilisant des bandes de 60 m et 90 m de long Reference number ISO/IEC 12247:1993(E) Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or net
3、working permitted without license from IHS-,-,-lSO/lEC 12247:1993 (E) contents Page Section 1 - General 1 scope 2 Conformance 2.1 Magnetic tape cartridge 2.2 Generating system 2.3 Receiving system 3 Normative references 4 Definitions 4.1 Absolute Frame Number (AFN) 4.2 Area ID 4.3 Automatic Track Fi
4、nding (ATF) 4.4 Average Signal Amplitude 4.5 azimuth 4.6 back surface 4.7 byte 4.8 cartridge 4.9 Channel Bit 4.10 Data Format ID 4.11 Early Warning Point (EWP) 4.12 End of Data (EOD) 4.13 Error Correcting Code (ECC) 4.14 flux transition position 4.15 flux transition spacing 4.16 frame 4.17 Housekeep
5、ing Frame 4.18 Logical Beginning of Tape (LBOT) (0 ISO/IEC 1993 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from t
6、he publisher. ISO/IEC Copyright Office l Case postale 56 l CH-1211 Genbe 20 l Switzerland Printed in Switzerland 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 ii Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or netw
7、orking permitted without license from IHS-,-,-ISO/IEC 12247:1993 Q 4.19 4.20 4.21 4.22 4.23 4.24 4.25 4.26 4.27 4.28 4.29 4.30 4.31 4.32 4.33 4.34 4.35 4.34 4.37 magnetic tape Master Standard Amplitude Calibration Tape Master Standard Reference Tape Optimum Recording Field partition boundary physica
8、l Beginning of Tape (PBOT) Physical End of Tape (PEOT) physical recording density pre-recording condition record Reference Recording Field Secondary Standard Amplitude Calibration Tape Secondary Standard Reference Tape Separator Mark Standard Reference Amplitude Tape Reference Edge Test Recording Cu
9、rrent track Virtual End of Tape (VEOT) 5 Environment and safety 5.1 Testing environment 5.2 Operating environment 5.3 Storage environment 5.4 Transportation 5.5 Safety 5.6 Flammability Section 2 - Requirements for the case 6 Dimensional and mechanical characteristics of the case 6.1 6.2 6.3 6.4 6.5
10、6.6 6.7 6.8 6.8.1 6.8.2 6.8.3 6.8.4 6.8.5 6.8.6 6.8.7 6.8.8 6.8.9 6.8.10 General Overall dimensions Loading grip Holding areas Notches of the lid Lid dimensions Optical detection of the beginning and end of tape Bottom side Locking mechanism of the slider Access Holes Recognition, Sub the outputs ar
11、e known and stated in relation to those of the Master Standard Amplitude Calibration Tape. NOTE - Secondary Standard Amplitude Calibration Tapes can he onlelbd fmm Sony Corporation, Audio Devioe Business Deparlm the light transmittance of the prism shall be greater than 50 % of that of a reference p
12、rism when measured as specified in annex A, - or, the light of a light source within the drive passes through the tape from inside the cartridge and falls through the lower windows onto the detectors placed on each side of the case. Copyright International Organization for Standardization Provided b
13、y IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-EO/IEC 12247:1993 (E) The positions and dimensions of these windows allow the cartridge to be used with drives implementing either system, they shall be 7=6,20mmf0,10mm b, = 7.65 mm f 0.10
14、mm I& = 1,50 mm:- &, = 39 mm f 0.1 mm &I = 1.8 mm f 0,l mm b2 = 7.0 mm f 0.2 mm b3 = 2,5 mm min. Dimension &, specifies the position of the rear edge of the windows relative to Reference Plane X. Dimension J& shall be measured relative to this rear edge. 6.8 Bottom side See figures 10 and 11. The bo
15、ttom side is shown in figure 10 with the lid and the slider in the closed position and in figure 11 with both in the open position. The dimension b4 of the bottom half, b5 of the slider and 4, of the lid shall satisfy the following conditions h, = 73.0 mm f 0.3 mm 5554 k36554 6.8.1 Locking mechanism
16、 of the slider The cartridge shall have a locking mechanism for the slider which locks it in the closed and open positions. The design of this mechanism is not specified by this International Standard, except for the different forces acting on the slider, and for its detent. The slider shall be spri
17、ng-loaded by a spring holding it in the closed position when it is unlocked. The force required to operate the slider shaIl not exceed 2 N. The slider shall have two grooves with an opening at each end. The detent of the locking mechanism shall protrude through these openings so as to hold the slide
18、r in both open and closed positions. The detent shown in cross-section C-C is only an example of implementation. The grooves are paraIlel to Reference Plane 2 and aligned with the slider lock release notches of the lid. The positions and dimensions of the grooves and of the openings for the detent o
19、f the locking mechanism when the slider is in the closed position shall be 7=12mmf0,1mm bs = 49.8 mm f 0.2 mm b, = 10.0 mm f 0.1 mm L40 = 2.0 mm +:t- * L4, = 3,0 mm min. L42 = 1.5 mm min. Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo
20、reproduction or networking permitted without license from IHS-,-,-IsO/lEC 12247: 1993 (E) L43 = 0.8 mm f 0.1 mm +w L44=0,8mm-olm” k = 45” min. L4s = 0.65 mm f 0,05 mm The position and dimensions of the openings for the detent when the slider is held in the open position are determined by kg, L40. L4
21、3 and L44- In the closed position of the slider, the maximum force to be exerted on the detent in a direction perpendicular to Reference Plane Z and over a stroke of 0.65 mm shall be 0.5 N max. In the open position of the slider the holding force shall be 0,3 N min. 6.8.2 Access Holes The slider sha
22、ll have two circular Access Holes (see section B-B) which, in the open position of the slider, allow penetration of the drive spindles into the hubs. The diameters of these Access Holes shall be d, = 10.0 mm f 0,2 mm d2 = 12.0 mm max. 6.8.3 Recognition, Sub-datums, and Write-inhibit Holes The bottom
23、 half shall have a number of holes on an edge at its rear. This edge shall be defined by L, = 45.2 mm f 0,2 mm L4, = 49.2 mm f 0.2 mm The centres of these holes lie on a line perpendicular to Reference Plane Y at a distance from Reference Plane X of L4, = 47.2 mm f 0.2 mm 6.8.3.1 Recognition Holes T
24、here shall be four Recognition Holes numbered from 1 to 4 as shown in figure 10. Their positions and dimensions shall be d3 = 2.5 mm f 0.1 mm L49= l,OmmfO,l mm Lso = 56,O mm f 0.3 mm L1=4,0mmf0,1mm Ls, = 1,O mm f 0.1 mm L5, = 3,0 mm min. All Recognition Holes shall have the cross-section shown in cr
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- ISOIEC122471993INFORMATIONTECHNOLOGY381MMWIDEMAGNETICTAPECARTRIDGEFORINFORMATIONINTERCHANGEHELICALSCANRECORDINGDDSFORMATUSING60MAND90MPDF

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