AS 2847.1-1986

1 - AS 2847.1- 1986 INFORMATION PROCESSING - DATA INTERCHANGE ON 130 MM (5.25 IN) FLEXIBLE DISH CARTRIDGES USING TWO-FREQUENCY RE
4 - PREFACE
5 - Contents
7 - 0 Introduction
7 - 1 Scope and field of application
7 - 2 References
7 - 3 Definitions
7 - 3.1 flexible disk
7 - 3.2 reference flexible disk cartridge
7 - 3.3 secondary reference flexible disk cartridge
7 - 3.4 signal amplitude reference flexible disk cartridge
7 - 3.5 typical field
7 - 3.6 reference field
8 - 3.7 test recording current
8 - 3.8 standard reference amplitudes
8 - 3.9 average signal amplitude
8 - 3.10 in contact
8 - 3.11 formatting
8 - 3.12 initialization
8 - 3.13 recording area
8 - 4 General description
8 - 4.1 General figures
8 - 4.2 Main elements
8 - 4.3 Description
8 - 4.4 Optional features
8 - 5 General requirements
8 - 5.1 Environment and transportation
8 - 5.1.1 Testing environment
8 - 5.1.2 Operating environment
9 - 5.1.3 Storage environment
9 - 5.1.4 Transportation
9 - 5.1.5 Handling
9 - 5.2 Materials
9 - 5.2.1 Jacket
9 - 5.2.2 Liner
9 - 5.2.3 Disk
9 - 5.2.4 Envelope
9 - 5.3 Direction of rotation
9 - 6 Dimensional characteristics
9 - 6.1 Jacket
9 - 6.1.1 Form
9 - 6.1.2 Thickness
10 - 6.1.3 Central windows
10 - 6.1.4 Index windows
10 - 6.1.5 Head windows
10 - 6.1.6 Reference edge profil e
10 - 6.1.7 Construction of the jacket
10 - 6.1.8 Notches
10 - 6.1.9 Write-enable notch
10 - 6.2 Liner
10 - 6.3 Disk
10 - 6.3.1 Diameters
11 - 6.3.2 Thickness
11 - 6.3.3 Index hole
11 - 6.3.4 Recording area
11 - 6.3.5 Sides
11 - 7 Physical characteristics
11 - 7.1 Inflammability
11 - 7.2 Coefficient of linear thermal expansion of the disk
11 - 7.3 Coefficient of linear hygroscopic expansion of the disk
11 - 7.4 Opacity
11 - 7.4.1 Opacity of the jacket
11 - 7.4.2 Opacity of the disk
11 - 8 Magnetic characteristics
11 - 8.1 Track geometry
11 - 8.1.1 Number of tracks
12 - 8.1.2 Width of tracks
12 - 8.1.3 Track location
12 - 8.1.4 Track number
12 - 8.1.5 I ndex
12 - 8.2 Functional testing
12 - 8.2.1 Surface tests
13 - 8.2.2 Track quality tests
13 - 8.2.3 Rejection criteria
13 - 9 Marking
17 - Annex A - Measurement of the cartridge thickness
17 - A.1 Maximum thickness
17 - A.2 Minimum thickness
19 - Annex B - Measurement of light transmittance
19 - B.0 Introduction
19 - B.1 Description of the measuring equipment
20 - B.2 Measuring method
21 - Annex C - Method for measuring the effective track width
22 - Annex D - Use of additional tracks