NF EN 61237-1 : 1994

Cooperating organizations
National foreword
Foreword
1. Scope
2. Normative references
3. General
4. Test conditions
5. Measuring equipment
5.1 Mechanical measurements
5.2 Optical measurements
6. Recorder measurements
6.1 Diameter of drum
6.2 Projection of video head pole tips
6.2.1 Mechanical measurement
6.2.2 Optical measurement
6.3 Gap width of video heads
6.4 Coplanarity error of video heads
7. Measurements on recorded tape
7.1 Tape speed and pitch of the video tracks
7.1.1 Tape speed v (first method)
7.1.2 Track pitch J (first method)
7.1.3 Tape speed and pitch of the video tracks
      (second method)
7.2 Position of the video reference point (VRP)
7.2.1 Measurement of the VRP position (first method)
7.2.2 Tracking and drum phase error (second method)
7.3 Location of records on sound and time code tracks
7.3.1 Track location to the reference tape edge
7.3.2 Longitudinal location of records
7.4 Video track geometry
7.4.1 Video track width 1
7.4.2 Cross-tape measuring technique (first method)
7.4.3 Dynamic track measurement (second method)
Figures
Annexes
A. Magnetic development of recorded tape
B. Bibliography
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

Describes the mechanical measurement methods on video tape recorders relating to the compatibility parameters for recording and measuring methods of the recorded tape. Coverage includes: mechanical measurements, optical measurements, diameter of drums, coplanarity error of video heads, and track location to the reference tape edge. Also gives detailed diagrams.