BS EN 60843-1:1994

Cooperating organizations
National foreword
Foreword
Section 1: General
1.1 Scope and object
1.2 Normative references
1.3 Environmental conditions
Section 2: Video tape
2.1 Types of magnetic tape and reference tape
2.2 Physical properties of the tape
2.2.1 Magnetic tape width
2.2.2 Magnetic tape width fluctuation
2.2.3 Magnetic tape thickness
2.2.4 Transparency of the magnetic tape
2.3 Magnetic properties of the tape
2.4 Recording characteristics of the tape
2.4.1 Video characteristics of the tape
2.4.2 Auxiliary audio characteristics
Section 3: Video tape cassette
3.1 Mechanical parameters
3.1.1 Dimensions of the cassette
3.1.2 Datum planes Z, X and Y
3.1.3 Tape winding
3.1.4 Window and label
3.1.5 Withdrawal force
3.1.6 Support areas A, B, C and D
3.1.7 Cassette holding areas
3.1.8 Incorrect insertion protection
3.1.9 Accidental erasure protection
3.1.10 Recognition holes
3.1.11 Changer grip
3.1.12 Lid
3.1.13 Reels
3.1.14 Reel spring
3.2 Magnetic tape length
3.3 Leader and trailer tape
3.3.1 Automatic stop
3.3.2 Dimensions of the leader and trailer tape
3.3.3 Transparency of the leader and trailer tape
3.3.4 Splicing
3.4 Cassette designation
Section 4: Video cassette recorders
4.1 Tape speed
4.1.1 525 line - 60 field system
4.1.2 625 line - 50 field system
4.2 Drum diameter
4.3 Tape tension
4.4 Inclined azimuth angle
4.5 Track configuration and dimensions
Section 5: Recording characteristics of the video signal
5.1 Video recording system
5.1.1 Block diagram for video recording
5.1.2 Frequency spectrum allocation of recording signals
5.2 Recording of the luminance component
5.2.1 Luminance filter
5.2.2 Pre-emphasis and clipping
5.2.3 Modulation characteristics
5.2.4 FM high-pass filter
5.2.5 Recording current
5.3 Recording of the chrominance component
5.3.1 Recording method
5.3.2 Pre-emphasis
5.3.3 Conversion method
5.3.4 Recording equalization
5.3.5 Recording current
5.3.6 Colour burst amplitude
5.3.7 Time difference between luminance and chrominance
Section 6: Recording characteristics of the audio signal
6.1 Audio recording system
6.2 FM audio signal recording
6.2.1 Carrier frequency
6.2.2 Reference deviation
6.2.3 Maximum deviation
6.2.4 Recording FM signal channel bandwidth
6.2.5 Recording current
6.2.6 Noise reduction
6.2.7 Others
6.3 PCM audio signal recording
6.3.1 Audio signal format
6.3.2 PCM signal format
6.3.3 PCM signal train
6.3.4 Error correction
6.3.5 Error detection
6.3.6 Modulation
6.3.7 Recording conditions
6.3.8 Noise reduction
6.4 Audio signal recording on the auxiliar audio track
6.4.1 Reference level
6.4.2 Playback equalization
6.4.3 Noise reduction
6.5 Noise reduction system
6.5.1 Specifications for FM and PCM audio
6.5.2 Specifications for AUX audio
Section 7: Characteristics of the tracking system
7.1 Tracking pilot signal recording
7.1.1 Tracking pilot signal frequencies
7.1.2 Recording current
7.2 Recording head positioning pilot signal recording
       (optional)
7.2.1 The burst pilot signal write and read area
7.2.2 The burst pilot signal frequency
7.2.3 Recording current
Section 8: Auxiliary track for cue
8.1 Recording on auxiliary cue track
Annex A - Reference tape and sub-reference tape
Figures
Tables
Annex ZA. Other international publications quoted in this
standard with the reference of this relevant European
publications
National annex NA (informative) Committees responsible
National annex NB (informative) Cross-references

Defines the electrical and mechanical characteristics for two head helical-scan video recorders for recording/playback of monochrome and colour television signals for 525 line 60 field and 625 line 50 field systems to ensure the interchangeability of recorded cassettes.