Pioneer tuning fork Service Manual page 26

Fig. 3 shows how the digital information is added to the
conventional analog information.
Digital
Audio Signals
(2-channels)
Mixer
EFM &
CIRC
Encoder
Digital
Signal
24
Video Signal
Frequency
Modulator
Frequency
Modulator
Mixer
Mixer
Limiter
Optical Cutter
Fig. 3 Adding Digital Audio Signals to LaserVision Signal
Analog
Audio Signals
(2-channels)
Composite signal
Waveform
Video FM signal
Audio FM signal
Signal