GB/T 14854.2-1993 Performance requirements for broadcast video tapes

This standard specifies the performance of video tapes for broadcasting. This standard applies to video tapes with a width of 25.4 mm and 19.00 mm. GB/T 14854.2-1993 Performance requirements for broadcast video tapes GB/T14854.2-1993 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Characteristic requirements for broadcast video tape
Characteristic requirements for broadcast video tape 1 Subject content and applicable scope
This standard specifies the performance of broadcast video tapes. This standard applies to video tapes with a width of 25.4 mm and 19.00 mm. Performance requirements for broadcast video tapes
The performance requirements for broadcast video tapes are shown in Table 1. Table 1
4. Residual elongation
5. Interlayer adhesion
6. Transverse bending deformation
Longitudinal bending deformation
8. Surface voltage
9. Optimum video current ratio
10. RF playback output, sensitivity
11. RF playback output sensitivity non-uniformity
12. Image brightness signal-to-noise ratio
13. Image chromaticity signal-to-noise ratio
14. Dropout
15. Stop image characteristics
Approved by the State Technical Supervision Bureau on December 30, 1993Magnetic layer
pieces/minute
GB/T 14854.2—93
25.4mm tape
25.4+8.10bzxZ.net
See Table 2
1000000
19. 00mm tape
19.00+0.03
See Table 2
Implemented on September 1, 1994
16. Sound relative sensitivity*
17. Sound relative sensitivity non-uniformity
18. Sound amplitude-frequency characteristics*
19. Sound distortion
20. Sound signal-to-noise ratio
21. Copy effect
22. Demagnetization degree
GB/T 14854.2--93
Continued Table 1
25.4nmim tape
19.00mtm tape
The * in the table is compared with the reference value of the reference tape. This standard stipulates that the group average value in the sampling of this model of products shall be taken as the reference. The absolute value of the signal-to-noise ratio of ear brightness and chromaticity (including amplitude modulation and phase modulation) shall not be less than 46dB for 25.4mm tape and shall not be less than 47dB for 19.00mm tape. Table 2
Nominal recording time, min
Additional instructions:
This standard is proposed by the Ministry of Radio, Film and Television
25.4mm tape
This standard is drafted by the Standardization Planning Institute of the Ministry of Radio, Film and Television. The main drafter of this standard is Chen Chengquan
Degree, m
19.00mm tape
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