BS 5942-12:1989

National foreword
Committees responsible
Specification
1 Scope
2 Measuring conditions
3 Published data
Section one - Minimum requirements for characteristics
              directly related to the sound reproducing
              quality
4 Rated minimum input signal level of the sound
    carrier for high fidelity performance
5 Sensitivity at 45 dB signal-to-noise ratio (input
    level of main sound carrier)
6 Effective frequency range
7 Channel unbalance
8 Total harmonic distortion
9 Variation of the total harmonic distortion with time
10 Channel separation (stereo)
11 Cross-talk attenuation for two separate sound
    channels
12 Unweighted (band limited) signal-to-noise ratio
13 Weighted signal-to-noise ratio
14 AM suppression ratio
15 Selectivity
16 Spurious response due to r.f. non-linearity
17 Rejection of fundamental and harmonics of the sub-
    carrier (systems with baseband sub-carriers)
18 Rejection of unwanted signals from the video channel
19 Variation of the rejection of unwanted signals from
    the video channel with time
20 Rejection of modulating signals in the band 14 kHz
    to 25 kHz approximately (used as supervising signals
    by same broadcasting authorities)
Section two - Other characteristics and requirements
21 Interconnection - (a) mechanical
                      (b) electrical
22 Characteristics to be specified