GB/T 3320.1-1987 Frequency response test record

GB/T 3320.1-1987 Frequency Response Test Record GB/T3320.1-1987 Standard Download Decompression Password: www.bzxz.net

National Standard of the People's Republic of China
GB/T3320.1—1987
Frequency response test record
Issued on December 10, 1987
Implemented on June 1, 1988
Issued by the Ministry of Radio, Film and Television of the People's Republic of China
National Standard of the People's Republic of China
Frequency response test record
Frequency response test record This standard is equivalent to the relevant provisions of IEC Publication No. 98. 1 Purpose
UDC681.854
GB/T3320.1—1987
3rev/min Frequency characteristics of mono and stereo playback equipment. This test record is suitable for measuring the rotation speed of 33-2 Dimensions
2.1 Nominal diameter: 300mm
2.2 Center hole diameter: 7.24+8mm
3 Recording content
Side A: 30~15000Hz point frequency test band, see Table 1. Side B: 20～20000Hz logarithmic sliding test frequency band, see Table 2. 4 Recording frequency characteristics
Side A point frequency test frequency band:
N(dB)=101g(1+4r)—101g(1+4)+101g(1+4n%)ti=75μs,
t2=-318μs,
ts-3180μs
Side B logarithmic sliding test frequency band:
The time constant of the logarithmic sliding test frequency band is 318μs and 3180μs, without high frequency pre-emphasis. When f=1000Hz, N=0dB.
5 Application
Refer to the various provisions of GB2354 "Electric Record Disc". 6 Marking
This record core is made with reference to Figures 1 and 2. Approved by the Ministry of Radio, Film and Television of the People’s Republic of China on December 10, 1987 and implemented on June 1, 1988
Frequency, Hz
15 000
GB/T3320.1—1987
Relative level dB
0(+10)
Modulation method
Left (L)
Right (R)
Left+right (L+R)
Left-right (L—R)
Time, s
Slip time, s
Level tolerance dB||tt| |Frequency Accuracy
Level Tolerance, dB
100~10000Hz±1dB
50～15000Hz±2dB
Additional Notes:
GB/T3320.1—1987
wareeanerwww.bzxz.net
response
Frequreney
GB 3320,1.87
Frequency response test piece
reeora
Production unit
Point frequency test band
2.15000-110001z
3.10000 6000Hz
4. 5000-- 1000 Hz
5.1090-200Hz
6.15030Hz
sorerbad
Fresueney response
record
Freauenayreponse
GB 3320.1-87
Frequency response test record
paosas
recurd
Production unit
ouanbard
Logarithmic sliding test frequency band
1. (L) 2. Right)
3. Left + right (1. + R) 4. Left and right (L -R)
20 --20000 1Fz
Suodsat suonhos
This standard was drafted by the Shanghai Branch of China Record Corporation of the Ministry of Radio, Film and Television. 3
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