SN EN 60712 : 1994 AMD 1 1994

Introduction
Chapter 1. Specifications for basic system
Section 1. General
1 Scope and object
2 Normative references
3 Environment
3.1 Testing environment
3.2 Operation environment
3.3 Reference tape (SP-format)
3.4 Calibration tape
Section 2. 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 Reels
Section 3. 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
5.6 Audio and control-track head position
5.7 Time-code head position
5.8 Tolerances on audio and control heads and time-code
       head (U-matic H format)
5.9 Gap azimuth
5.10 Time-code head position for SP-format
6 Tape speed
7 Track configuration and dimensions
7.1 Video track width (U-matic H-format)
7.2 Video guard-band width (U-matic H-format)
7.3 Location of address track (U-matic H format)
7.4 Switching position between two video heads
       (U-matic H-format)
8 Recording characteristics
Section 4. 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
11.3 Coercivity (SPtape)
Section 5.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
12.7 Non-linear pre-emphasis (SP format)
13 Audio signal channels
13.1 Audio recording characteristic
13.2 Optimum audio bias current
13.3 Use of the audio tracks
13.4 Recorded tape flux characteristics
14 Control signal channel
14.1 Control signal polarity
14.2 Waveform of recording current
14.3 Control signal level
14.4 Time-code recording
14.5 Duty cycle T1/T2
15 Chrominance channel
15.1 Modulation system
15.2 Chrominance signal bandwidth
15.3 Recording signal spectrum
16 U-matic H-format chrominance channel
16.1 Modulation system
16.2 Reference frequencies
16.3 Chrominance pre-emphasis
16.4 Chrominance recording current
16.5 Chrominance signal bandwidth
16.6 Time delay
16.7 Chrominance channel (SP-format)
Figures
Chapter 2. Specifications for standard alignment tape
Section 6. General
17 Scope and object
18 Environment
Section 7. 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 8. Video tape recorder
24 Type of video-tape recorder
Section 9. 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 10. Recorded signals
28 Video signal
29 Audio signal
Annexes
A (informative) IEC U-matic SP-format reference tape
ZA (normative) other international publications quoted
in this standard with the references of the relevant
European publications
   
   

Contains the definition of parameters for the two-head helical-scan video recording playback system known as U-matic SP-format. Gives dimensional and other characteristics. Applies to magnetic video recording and/or playback with 19 mm (3/4 in) tape cassettes on two-head helical-scan videocassette recorders.