IEC 61118:1993

Foreword
Section 1: General
Clause
1.1 Scope
1.2 Normative references
1.3 Environment and test conditions
     1.3.1 Environment
     1.3.2 Reference tape
     1.3.3 Calibration tape
Section 2: Video tape cassette
2.1 Mechanical parameters
     2.1.1 Cassette type
     2.1.2 Dimensions of cassettes
     2.1.3 Cassette dimension datum system
     2.1.4 Window and label-pasting faces
     2.1.5 Identification holes
     2.1.6 Dimensions of reels
     2.1.7 Tape windings
     2.1.8 Unlocking of lid
     2.1.9 Opening of lid
     2.1.10 Releasing of reel brake
     2.1.11 Automatic stop
Section 3: Video cassette recorders
3.1 Definitions
     3.1.1 Scanner
     3.1.2 Drum
     3.1.3 Upper drum
     3.1.4 Lower drum
     3.1.5 Effective drum diameter
     3.1.6 Helix angle
     3.1.7 Track angle
3.2 Drum diameter and structure
     3.2.1 Actual upper drum diameter
     3.2.2 Actual lower drum diameter
     3.2.3 Upper drum section
3.3 Scanner pole tips
     3.3.1 Pole tip projection
     3.3.2 Pole tips
     3.3.3 Chordal distance between luminance and
            chrominance pole tips
     3.3.4 Axial distance between luminance and
            chrominance pole tips
     3.3.5 Channel identification
3.4 Helix angle
3.5 Dimensions and location of records
     3.5.1 Test environment
     3.5.2 Tape speed
     3.5.3 Record locations and dimensions
     3.5.4 Video record curvature
     3.5.5 Gap azimuth
3.6 Recording characteristics
Section 4: Tape characteristics
4.1 Dimensions of video tape
     4.1.1 Magnetic tape thickness
     4.1.2 Magnetic tape width
4.2 Magnetic tape properties
     4.2.1 Type of magnetic tape
     4.2.2 Magnetic orientation
     4.2.3 Coercivity
4.3 Leader tape and trailer tape
     4.3.1 Automatic stop
     4.3.2 Dimensions of leader and trailer tape
     4.3.3 Splicing
Section 5: Recording characteristics
5.1 Video signal recording
     5.1.1 Luminance channel
     5.1.2 Chrominance channel
     5.1.3 Y-C timing
     5.1.4 Vertical interval subcarrier (VISC)
5.2 Longitudinal audio signal recording
     5.2.1 Recording method
     5.2.2 Recording/Reproducing reference levels
     5.2.3 Frequency characteristics
     5.2.4 Track usage (common audio mode)
     5.2.5 Program audio head phasing
     5.2.6 Recording polarity
5.3 FM audio signal recording (optional)
     5.3.1 Recording/Reproducing reference levels
     5.3.2 Noise reduction
     5.3.3 Pre-emphasis
     5.3.4 Frequency modulation
     5.3.5 Recording head current
     5.3.6 Recording polarity
5.4 Time and control code signal recording
     5.4.1 Time and control code
     5.4.2 Recording track
     5.4.3 Recording method
     5.4.4 Recording level
5.5 Tracking control signal recording
     5.5.1 Recording track
     5.5.2 Recording waveform and level
     5.5.3 Polarity of remanent magnetization
     5.5.4 Timing and period
     5.5.5 Colour framing information
     5.5.6 Magnetization level
     5.5.7 Rise time
5.6 PCM audio recording (PCM audio mode)
     5.6.1 Source coding
     5.6.2 Signal processing
Figures
Annexe A - Reference tape

Defines dimensions and other characteristics of equipment which are necessary to ensure the interchangeability of recorded cassettes. The requirements relate to 525 line-60 field and 625 line-50 field systems.