ISO/IEC INTERNATIONAL STANDARD 14840 First edition 1996-08-01 Information technology -- 12,65 mm wide magnetic tape cartridge for information interchange -- Helical scan recording Data-D3-1 format Technologies de I'information -- Cartouche de bande magnétique de 12.65mmde largepour I'echanged'information--Enregistrementpar balayageen spirale-Formatde donnees-D3-1 IEC ISo Reference number ISO/IEC 14840:1996(E) Copyright Intemational Organization for Standardization oyIHS Not for Resale ISO/IEC 14840:1996 (E) Contents Page Section 1 . General 1 1 Scope 1 2Conformance 1 2.1 Magnetic tape cartridge 1 2.2 Generating system 1 2.3 Receiving system 1 3 Normative References 1 4 Definitions 2 4.1 a.c. erase 2 4.2 algorithm 2 4.3 Average Signal Amplitude 2 4.4 azimuth 2 4.5 back surface 2 4.6 Beginning of Tape (BOT) 2 4.7 Beginning of Tape Sense Slot 2 4.8 byte 2 4.9 cartridge 2 4.10 character 2 4.11 Codeword Digital Sum (CDS) 2 4.12Cyclic Redundancy Check (CRC) Character 2 4.13 Data Area Reference Point 2 4.14 Data Records 2 4.14.1 Logical Data Record (LDR) 2 4.14.2Processed Data Record (PDR) 2 4.14.3 User Data Record (UDR) 2 4.15 Digital Sum Variation (DSV) 2 4.16 End of Tape (EOT) 3 4.17 End of Tape Sense Slot 3 4.18 Error Correcting Code (ECC) 3 4.19File safe 3 4.20 Fixed Scan Group Header 3 C1SO/EC1996 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized without permission in writingfrom thepublisher. ISO/IEC Copyright Office * Case Postale 56 * CH-1211 Geneve 20 * Switzerland Printed in Switzerland No reproduc Not for Resale ISO/IEC 14840:1996 (E) @ ISO/IEC 4.21 flux transition position 3 4.22 flux transition spacing 3 4.23 Helical Time Code (HTC) 3 4.24 Internal Leader Header (ILH) 3 4.25 Logical Block Number 3 4.26 magnetic tape 3 4.27 Master Standard Reference Tape 3 4.28 Packet 3 4.29 Packet Identifier 3 4.30 Packet Trailer 3 4.31 physical recording density 3 4.32 Postamble 3 4.33 Preamble 3 4.34 processed data 3 4.35 Reference Fields 3 4.36 resolution 3 4.37 Scan Group 3 4.38 Scan Group Pair 3 4.39 Scan Group Start Data (SGSD) 3 4.40 Secondary Standard Reference Tape 3 4.41 Standard Reference Amplitudes (SRA) 3 4.42 Standard Reference Currents (Ir) 4 4.43 Tape Reference Edge 4 4.44 Test Recording Currents (TRC) 4 4.45 track 4 4.46 track angle 4 4.47 Typical Field (TF) 4 4.48 Variable Scan Group Header 4 4.49 zero crossing 4 5 Conventions and Notations 4 5.1 Representation of numbers 4 5.2 Names 5 6Acronyms 5 7 Environment and Safety 5 7.1 Testing environment 5 7.2 Operating environment 5 7.3 Storage environment 5 7.4 Transportation 6 7.5 Safety 6 7.6 Flammability 6 7 Section 2 - Requirements for the Cartridge 8 Dimensional and Mechanical Characteristics of the Cartridge 7 8.1 Elements of the cartridge 7 8.2 Reference Planes of the case 7 8.3 Dimensions of the case 7 8.3.1 Overall dimensions 7 8.3.2 Locating areas 8 8.3.3 Reference points for Plane Y 8 8.3.4 Reference point for Plane Z 8 8.3.5 Locating notches 8 ii networking permitted without license from IHS Not for Resale