AS 2747.1-1985

1 - AS 2747.1-1985 INFORMATION PROCESSING-DATA INTERCHANGE ON 200 mm FLEXIBLE DISK CARTRIDGES USING TWO-FREQUENCY RECORDING...
4 - PREFACE
6 - 0 Introduction
6 - 1 Scope and field of application
6 - 2 References
6 - 3 Definitions
6 - 3.1 flexible disk:
6 - 3.2 reference flexible disk cartridge:
6 - 3.3 secondary reference flexible disk cartridge:
6 - 3.4 signal amplitude reference flexible disk cartridge:
6 - 3.5 typical field:
6 - 3.6 reference field:
7 - 3.7 test recording currents:
7 - 3.8 standard reference amplitudes:
7 - 3.9 average signal amplitude:
7 - 3.10 in contact:
7 - 3.11 formatting:
7 - 3.12 initialization:
7 - 3.13 recording area:
7 - 4 General description
7 - 4.1 General figures
7 - 4.2 Main elements
7 - 4.3 Description
7 - 4.4 Optional features
7 - 5 General requirements
7 - 5.1 Environment and transport
7 - 5.1.1 Testing environment
7 - 5.1.2 Operating environment
8 - 5.1.3 Storage environment
8 - 5.1.4 Transportation
8 - 5.1.5 Handling
8 - 5.2 Materials
8 - 5.2.1 Jacket
8 - 5.2.2 Liner
8 - 5.2.3 Disk
8 - 5.2.4 Envelope
8 - 5.3 Direction of rotation
8 - 6 Dimensional characteristics
8 - 6.1 Jacket
8 - 6.1.1 Form
8 - 6.1.2 Thickness
9 - 6.1.3 Central windows
9 - 6.1.4 Index windows
9 - 6.1.5 Head windows
9 - 6.1.6 Reference edge profile
9 - 6.1.7 Construction of the jacket
9 - 6.1.8 Notches
9 - 6.2 Liner
9 - 6.3 Disk
9 - 6.3.1 Diameters
9 - 6.3.2 Thickness
10 - 6.3.3 Index hole
10 - 6.3.4 Recording area
10 - 6.3.5 Sides
10 - 7 Physical characteristics
10 - 7.1 Inflammability
10 - 7.2 Coefficient of linear thermal expansion of the disk
10 - 7.3 Coefficient of linear hygroscopic expansion of the disk
10 - 7.4 Opacity
10 - 7.4.1 Opacity of the jacket
10 - 7.4.2 Opacity of the disk
10 - 7.5 Torque
10 - 7.5.1 Starting torque
10 - 7.5.2 Running torque
10 - 8 Magnetic characteristics
10 - 8.1 Track geometry
10 - 8.1.1 Number of tracks
10 - 8.1.2 Width of tracks
10 - 8.1.3 Tracks locations
11 - 8.1.4 Track number
11 - 8.1.5 Index
11 - 8.2 Functional testing
11 - 8.2.1 Surface tests
11 - 8.2.2 Track quality test
12 - 8.2.3 Rejection criteria
16 - Annex A - Measurement of the cartridge thickness
16 - A.1 Maximum thickness
16 - A.2 Minimum thickness
16 - A.3 Thickness of the flaps (if any)
18 - Annex B - Measurement of light transmittance
18 - B.0 Introduction
18 - B.1 Description of the measuring equipment
18 - B.1.1 Radiation source
18 - B.1.2 Radiation receiver
18 - B.1.3 Optical path (see figure 12)
18 - B.1.4 Measuring circuitry
19 - B.2 Measuring method
19 - B.2.1 Measurement of the disk
19 - B.2.2 Measurement of the jacket
20 - Annex C - Method for measuring the effective track width
21 - Annex D - Write-inhibit notch
21 - D.1 Data interchange
21 - D.2 Other applications