EN 60712:1994/A1:1994

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)
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.