NF EN 60961 : 1994

Cooperating organizations
National foreword
Foreword
Section one: General
1 Scope
2 Normative references
3 Environment and test conditions
3.1 Environment
3.2 Reference tape
3.3 Calibration tape
Section two: Video tape and video tape cassette
Section three: Video cassette recorders
4 Definition of terms
4.1 Scanner
4.2 Drum
4.3 Upper drum
4.4 Lower drum
4.5 Effective drum diameter
4.6 Helix angle
4.7 Track angle
4.8 Centre span tension
4.9 Wrap angle
4.10 Lead signal overlap
5 Scanner pole-tips
5.1 Pole-tip projection
5.2 Luminance pole-tips
5.3 Colour-recording pole-tips
5.4 Erase pole-tips
5.5 Channel identification
6 Helix angle
7 Drum diameter and tape tension
7.1 Actual upper drum diameter
7.2 Actual lower drum diameter
7.3 Upper drum
7.4 Centre span tension
8 Dimensions and location of records
8.1 Test environment
8.2 Tape speed
8.3 Recording locations and dimensions
8.4 Curvature of video recordings
8.5 Relative positions of recorded signals
8.6 Gap azimuth
9 Luminance and colour-recording system
10 Recording characteristics
Section four: Recording characteristics
11 Video recording
11.1 Luminance channel
11.2 Chrominance channel
11.3 Decoding and colour-field identification
12 Longitudinal audio signal recording (channels 1
      and 2)
12.1 Reference levels
12.2 Frequency response
12.3 Track usage
13 FM audio signal recording (channels 3 and 4)
13.1 Signal processing
13.2 Reference levels
13.3 Noise reduction
13.4 Frequency modulation
13.5 Recording current
13.6 Track usage
14 Time and control code recording
14.1 Designated track for time and control code
14.2 Recording method
15 Tracking control recording
15.1 Tracking control signal
15.2 Tracking control and video timing
15.3 Recording method
Section five: Type-L format video tape and video tape
               cassette
16 Mechanical characteristics of video tape cassette
16.1 Cassette outside dimensions
16.2 Datum planes
16.3 Window area and label area
16.4 Manufacturer's identification holes
16.5 Safety tab and safety plug
16.6 Reel
16.7 Cassette lid
17 Magnetic tape
17.1 Type of magnetic tape
17.2 Tape width
17.3 Tape thickness and length
17.4 Coercivity
17.5 Transmissivity
17.6 Offset yield strength
17.7 Residual elongation
17.8 Magnetic orientation
18 Leader tape/trailer tape
18.1 Mechanical characteristics
18.2 Leader tape and trailer tape dimensions
18.3 Offset yield strength
18.4 Splicing break strength
Figures
Annexes
A Cross tape track measurement technique
B Reference tapes
ZA (normative) Other international publications
      quoted in this standard with the references of the
      relevant European publications
National annex NA (informative) Committees responsible
National annex NB (informative) Cross-references

Applies to magnetic video recording and/or reproduction using 12,65 mm (0,5 in) tape cassettes on helical scan video cassette recorders suitable for broadcast applications. Applies to two recording modes: MODE I (uses oxide particle tape) and MODE II (uses metal particle tape and permits frequency modulated audio signals to be recorded). Coverage includes: environment and test conditions; definition of terms; scanner pole tips; helix angle; drum diameter and tape tension; dimensions and location of records; luminance and colour recording system; time and control code recording; tracking control recording. Also gives detailed diagrams and annexes.