NF EN 61120-4 : 1992

Cooperating organizations
National foreword
Foreword
1. Scope
2. Normative references
3. Definitions
3.1 Flux transitions
3.2 Physical recording density
3.3 Test density
3.4 Recording current wave form
3.5 Recording current peak-to-peak value
3.6 Recommended recording current
3.7 Reference recording current
3.8 Test recording current
3.9 Average signal level
3.10 Standard reference level
4. Technical requirements and test conditions
4.1 Standard atmospheric conditions
4.2 Mechanical characteristics of test equipment
4.3 Electrical characteristics of test equipment
4.4 Reference tapes
4.5 Condition of the tape to be tested
5. Electrical parameters to be measured
5.1 Resolution
5.2 Overwrite characteristic
5.3 Drop-outs
5.4 Relative average signal level to noise ratio
5.5 Characteristics of the sub-tracks in case of bias-
      recording
6. Recommended parameters to be described in published
      data for professional digital audio tapes
7. Mechanical parameters to be measured
Figures
Annex A (informative) Name and address of the manufacturer
of primary standard IEC reference tapes
Annex 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 methods of measurement for the properties of magnetic tapes used in digital audio reel to reel recording and reproducing systems using 6,3mm magnetic tape for professional use. Coverage includes: physical recording density; recording current wave form; average signal level; characteristics of the sub tracks in the case of bias recording; overwrite characteristics; mechanical characteristics of test equipment; electrical characteristics of test equipment.