NF EN 60774-2 : 2000 CORR 1 2000

1 Scope
2 Normative references
3 Recording method
4 Mechanical configuration
      4.1 FM audio track pattern
      4.2 Head azimuth angles
      4.3 Recording time difference
5 Recording characteristics
      5.1 Noise reduction
      5.2 Pre-emphasis
      5.3 Carrier center frequency
      5.4 Frequency deviation
      5.5 Modulation polarity
      5.6 Recording level
6 Other subjects (channel application)
Figure 1 - Track arrangement
Figure 2 - Pre-emphasis frequency response
Figure 3 - Signal spectrum
Figure 4 - Block diagram of FM audio recording
Figure 5 - Block diagram of noise reduction system
Figure A.1 - Encoder transient measurement method
Table 1 - FM audio track dimensions
Table 2 - Head azimuth angles
Table 3 - Carrier center frequencies
Table 4 - Channel applications
Annex A (normative) Encoder transient measurement method
Annex ZA (normative) Normative references to international
                     publications with their corresponding
                     European publications

Applies to frequency modulation (FM) audion recording fully compatible with the VHS system given in IEC 60774-1. It defines the electrical and mechanical characteristics of FM audio recording which will provide for the interchangeability of recorded cassettes.