ECMA 240 : 1ED 96

Section 1 - General
1 Scope
2 Conformance
   2.1 Optical disk cartridge
   2.2 Generating system
   2.3 Receiving system
   2.4 Compatibility statement
3 Reference
4 Definitions
   4.1 addressable track
   4.2 band
   4.3 case
   4.4 Channel bit
   4.5 Clamping Zone
   4.6 control track
   4.7 Cyclic Redundancy Check (CRC)
   4.8 defect management
   4.9 disk reference plane
   4.10 embossed mark
   4.11 entrance surface
   4.12 Error Correction Code (ECC)
   4.13 field
   4.14 format
   4.15 interleaving
   4.16 land and groove
   4.17 mark
   4.18 one-beam overwrite
   4.19 optical disk
   4.20 optical disk cartridge (ODC)
   4.21 phase change (PC)
   4.22 physical track
   4.23 pitch
   4.24 polarization
   4.25 read power
   4.26 recording layer
   4.27 Reed-Solomon code
   4.28 rewritable disk
   4.29 sector
   4.30 spindle
   4.31 substrate
   4.32 write once disk
   4.33 ZCAV
   4.34 zone
5 Conventions and notations
   5.1 Representation of numbers
   5.2 Names
6 List of acronyms
7 General description of the optical disk cartridge
8 General requirements
   8.1 Environments
   8.2 Temperature shock
   8.3 Safety requirements
   8.4 Flammability
9 Reference Drive
   9.1 Optical system
   9.2 Optical beam
   9.3 Read channel
   9.4 Tracking
   9.5 Rotation of the disk
Section 2 - Mechanical and physical characteristics
10 Dimensional and physical characteristics of the case
   10.1 General description of the case
   10.2 Reference planes of the case
   10.3 Dimensions of the case
   10.4 Mechanical characteristics
11 Dimensional, mechanical and physical characteristics of
   the disk
   11.1 General description of the disk
   11.2 Reference axis and plane of the disk
   11.3 Dimensions of the disk
   11.4 Mechanical characteristics
   11.5 Optical characteristics
12 Interface between cartridge and drive
   12.1 Capture cylinder
   12.2 Disk position in operating condition
Section 3 - Format of information
13 Geometry of physical tracks
   13.1 Physical track shape
   13.2 Direction of rotation
   13.3 Physical track pitch
   13.4 Addressable track number
14 Format of the Information Zone
   14.1 General description of the Information Zone
   14.2 Division of the Information Zone
15 Addressable track format
   15.1 Addressable track layout
   15.2 Clock frequencies and periods
   15.3 Radial alignment
   15.4 Sector number
16 Sector format
   16.1 Sector layout
   16.2 Sector Mark (SM)
   16.3 VFO fields
   16.4 Address Mark (AM)
   16.5 ID fields
   16.6 Postamble 1 (PA1)
   16.7 Offset Detection Field (ODF)
   16.8 Gap
   16.9 Sync
   16.10 Data field
   16.11 Buffer field
17 Recording code
18 Format of the Data Zone
   18.1 Buffer tracks in the Data Zone
   18.2 Defect Management Areas (DMAs)
   18.3 Disk Definition Structure (DDS)
   18.4 Defect Management Sector (DMS)
   18.5 Working Defect List (WDL)
   18.6 Partitioning
19 Defect management
   19.1 Initialization of the disk
   19.2 Certification
   19.3 Disks not certified
   19.4 Write procedure
   19.5 Primary Defect List (PDL)
   19.6 Secondary Defect List (SDL) and Working Defect List
         (WDL)
Section 4 - Characteristics of embossed information
20 Method of testing
   20.1 Environment
   20.2 Reference Drive
   20.3 Definition of signals
21 Signals from grooves
   21.1 Push-pull signal
   21.2 Divided push-pull signal
   21.3 On-track signal
   21.4 Phase depth
   21.5 Track location
22 Signals from Headers
   22.1 Sector Mark
   22.2 VFO1 and VFO2
   22.3 Address Mark, ID field and Postamble
23 Signals from embossed Recording fields
Section 5 - Characteristics of the recording layer
24 Method of testing
   24.1 Environment
   24.2 Reference Drive
   24.3 Write conditions
   24.4 Definition of signals
25 Write characteristics
   25.1 Resolution and modulation depth
   25.2 Narrow-band signal-to-noise ratio
   25.3 Cross-talk
26 Overwrite erasability
Section 6 - Characteristics of user data
27 Method of testing
   27.1 Environment
   27.2 Reference Drive
28 Minimum quality of a sector
   28.1 Headers
   28.2 User-written data
   28.3 Embossed data
29 Data interchange requirements
   29.1 Tracking
   29.2 User-written data
   29.3 Quality of disk
Annex A Edge distortion test
Annex B Compliance test
Annex C CRC for ID fields
Annex D Format of the Data field of a sector
Annex E Contents of the Control Zone
Annex F Definition of the overwrite pulse
Annex G Air cleanliness class 100 000
Annex H Position of the cartridge relative to the reference
        planes
Annex J Relaxation by zones of the requirements for signals
Annex K Track deviation measurement
Annex L Guidelines for sector replacement
Annex M Derivation of the operating climatic environment
Annex N Transportation
Annex P Office environment
Annex Q Measurement of birefringence

Specifies the characteristics of 120 mm Optical Disk Cartridges (ODCs) with a capacity of 650 Mbytes using Phase Change PD format. Specifies two related, but different implementations of such cartridges, viz. Type R/W, Type WORM. Provides for interchange between optical disk drives. Together with a standard for volume and file structure, it provides for full data interchange between data processing systems.