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HELICAL-SCAN VIDEO-TAPE CASSETTE SYSTEM USING 19 MM (3/4 IN.) MAGNETIC TAPE, KNOWN AS U-FORMAT
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Available format(s): Hardcopy, PDF
Language(s): English
Published date: 01-01-1995
Publisher: National Standards Authority of Ireland
For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.Only cited Standards give presumption of conformance to New Approach Directives/Regulations.Dates of withdrawal of national standards are available from NSAI.
INTRODUCTIONCHAPTER 1: SPECIFICATIONS FOR BASIC SYSTEMSECTION 1: GENERAL1 Scope and object2 Normative references3 Environment 3.1 Testing environment 3.2 Operation environment 3.3 Reference tape (SP-format) 3.4 Calibration tapeSECTION 2: VIDEO-TAPE CASSETTE4 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 ReelsSECTION 3: VIDEOCASSETTE RECORDERS5 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-format6 Tape speed7 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 characteristicsSECTION 4: TAPE CHARACTERISTICS9 Type of magnetic tape10 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 Splicing11 Magnetic tape properties 11.1 Magnetic orientation 11.2 Coercivity 11.3 Coercivity (SPtape)SECTION 5: RECORDING CHARACTERISTICS12 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 characteristics14 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/T215 Chrominance channel 15.1 Modulation system 15.2 Chrominance signal bandwidth 15.3 Recording signal spectrum16 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 TAPESECTION 6: GENERAL17 Scope and object18 EnvironmentSECTION 7: RECORDED TAPE CHARACTERISTICS19 Construction of tape and cassette20 Type of tape21 Tape dimensions 21.1 Tape thickness 21.2 Tape width22 Magnetic orientation23 Track configuration and dimensionsSECTION 8: VIDEO TAPE RECORDER24 Type of video-tape recorderSECTION 9: RECORDING CHARACTERISTICS25 Recording characteristics26 Recording of luminance signal 26.1 Characteristic frequencies 26.2 Pre-emphasis27 Recording current of chrominance signalSECTION 10: RECORDED SIGNALS28 Video signal29 Audio signalAnnexesA (informative) IEC U-matic SP-format reference tapeZA (normative) other international publications quoted in this standard with the references of the relevant European publications
Applicable to magnetic video recording and/or playback with 19 mm (3/4 in.) tape cassettes on two-head helical-scan videocassette recorders, suitable for recording and/or playback of monochrome as well as colour television programmes.
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