BS 7486-1:1991
Current
The latest, up-to-date edition.
Specification for helical-scan video tape cassette system using 12.65 mm (0.5 in) magnetic tape on type Beta format. FM audio recording 625 line-50 field systems
Hardcopy , PDF
English
30-09-1991
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Committees responsible
National foreword
Specification
1. Scope
2. Normative reference
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 Dynamic emphasis
5.2 Carrier centre frequency
5.3 Frequency deviation
5.4 Recording level
5.5 Modulation polarity
6. Other subjects
6.1 Channel application
Annex
A. Encoder transient measurement method
Tables
1. Head azimuth angles
2. Frequency response - Encode mode
3. Channel application
Figures
1. Track pattern of beta for FM audio system (625
lines-50 field)
2. Video and FM audio signal spectrum (625 line-
50 field)
3. Block diagram of FM audio recording system
4. Block diagram of dynamic emphasis
Defines electrical and mechanical characteristics to ensure the interchangeability of recorded cassettes.
| Committee |
EPL/100
|
| DevelopmentNote |
Also numbered as IEC 61053-1 Supersedes 88/30303 DC (10/2005)
|
| DocumentType |
Standard
|
| Pages |
12
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
This part of IEC 1053 is applicable to frequency modulation (FM) audio recording on video recorders fully compatible with the beta format for 625 lines-50 field television systems defined in IEC 767.
The object of this part is to define the electrical and mechanical characteristics of FM audio recording which will provide for the interchangeability of recorded cassettes. The requirements given relate to 625 lines-50 field systems.
| BS EN 61041-3:1995 | Non-broadcast video tape recorders. Methods of measurement Audio characteristics for FM recording |
| BS 6502:1984 | Specification for helical-scan video tape cassette system using 12.65 mm (0.5 in) magnetic tape on type Beta format |
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