ANSI INCITS 158 : 1987

1 Scope and Purpose
  1.1 Scope
  1.2 Purpose
2 Referenced and Related Standards
  2.1 American National Standards
  2.2 Other Standard
  2.3 Related American National Standard
3 Definitions
4 Recording
  4.1 Method
  4.2 GCR Code
  4.3 Density of Recording
  4.4 Measurement of Signal Amplitude
  4.5 Signal Amplitude
  4.6 Erasure
  4.7 Azimuth
5 Tracks
  5.1 Number and Use of Tracks
  5.2 Reference Edge
  5.3 Track Centerline Locations
  5.4 Track Width for 0.032 Inch (0.61 mm) Track Spacing
6 Data Block
  6.1 Preamble
  6.2 Data Block Marker
  6.3 Data Block
  6.4 Block Address
  6.5 Cyclic Redundancy Check
  6.6 Postamble
7 File Mark Block
8 Control Block
  8.1 Data Field
  8.2 Use of Control Blocks
9 Rewritten Blocks
  9.1 Error
  9.2 Streaming Termination
  9.3 Forced Streaming
  9.4 End of Recorded Data

Outlines a recording and format standard for an 8000 bpi streaming 0.150 inch wide, 4-track magnetic tape cassette for interchange of information among processing and communications systems, and associated equipment, using a standard code.