Appendix C.- Measurement Of The Video / Audio Ratio; Analogue Channels - Promax 10 Manuel D'utilisation

USER'S MANUAL. PROMAX-10
APPENDIX C.- MEASUREMENT OF THE VIDEO / AUDIO RATIO

-ANALOGUE CHANNELS-

It permits to measure the ratio between the video carrier and the audio carrier
amplitudes.
Although this process depends on the standard used, it is usual to consider
that a properly transmitted PAL channel should have a sound subcarrier 13 dB below
the video carrier.
Figure 43.- Video / Audio ratio measurement.
These specifications ensure that there is no interference in the same or the
adjacent channel.
04/2004
= −
V / A V A ( dB )
L L
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