BS 6370:1983

National foreword
Committees responsible
Introduction
Chapter I: Specifications for basic system
Section one - General
1 Scope
2 Object
3 Environment
3.1 Testing environment
3.2 Operating environment
Section two - Video tape cassette
4 Mechanical parameters
4.1 Dimensions of cassette
4.2 Tape path and guidance
4.3 Tape winding
4.4 Label and window area
4.5 Withdrawal force
4.6 Guiding groove
4.7 Safety cap and safety hole
4.8 Automatic stop
4.9 Cassette support areas
4.10 Reel
Section three - Videocassette recorders
5 Mechanical parameters
5.1 Type of videocassette recorder
5.2 Reel spindle of videocassette recorder
5.3 Back tension
5.4 Audio and control head position
5.5 Audio and control head dimensions
6 Tape speed
7 Track configuration and dimensions
8 Recording characteristics
Section four - Tape characteristics
9 Type of magnetic tape
10 Construction and dimensions of the tape
10.1 Magnetic tape thickness
10.2 Magnetic tape width
10.3 Leader tape and trailer tape thickness
10.4 Leader tape and trailer tape length
10.5 Splicing
11 Magnetic tape properties
11.1 Magnetic orientation
11.2 Coercivity
Section five - Recording characteristics
12 Luminance channel
12.1 Modulation system
12.2 Recording current
12.3 Characteristic frequencies
12.4 Pre-emphasis
12.5 Recording frequency bandwidth
12.6 White clipping level
13 Audio signal channels
13.1 Audio recording characteristic
13.2 Optimum audio bias current
14 Control signal channel
14.1 Control signal polarity
14.2 Waveform of recording current
14.3 Control signal level
15 Chrominance channel
15.1 Modulation system
15.2 Chrominance signal bandwidth
15.3 Recording signal spectrum
Figures
Chapter II: Specifications for standard alignment tape
Section six - General
16 Scope
17 Object
18 Environment
Section seven - Recorded tape characteristics
19 Construction of tape and cassette
20 Type of tape
21 Tape dimensions
21.1 Tape thickness
21.2 Tape width
22 Magnetic orientation
23 Track configuration and dimensions
Section eight - Video tape recorder
24 Type of video tape recorder
Section nine - Recording characteristics
25 Recording characteristics
26 Recording of luminance signal
26.1 Characteristic frequencies
26.2 Pre-emphasis
27 Recording current of chrominance signal
Section ten - Recorded signals
28 Video signal
29 Audio signal

Gives dimensional and other characteristics necessary to permit the interchangeability of cassettes for both 50 Hz/625-line and 60 Hz/525-line television signals when using portable U-matic recorders for such purposes as electronic news gathering, programme interchange and archive purposes.