KBL 6800 - External Music Signal with Channel Selection

42
Music ampli• er
3220 2885 00
E8: 6 5 ... 2 1
I
2
C Audio-
switch
3220 3230 20
MP3
megaVoice
3220 3222 95
Processor
Channel
selection
3220 3110 00
Masse
Music signal
shielded cablel
Operation and Service KBL 6800/6900
7.7 External music signal with channel selection
100V-Signal
If the external music signal is a 100V-signal, the transmitter is
introduced into the signal path in front of the Audio switch. (see
7.5)
To connect the music signal use a 2-pole shielded cable, the shield has to be earthed
at the signal source. The cable is connected to the marked clamps of the Audio switch.
The potentiometer is used to set the signal. The loudspeakers are connected in parallel,
equal-phased.
Audio switch
The following diagram shows the wiring of the channel selection on the audio
equipment’s side.
Wiring on the audio system of the studio
PE1 2 3 4 5
Volume +
Volume -
ch. selection -
ch. selection +
Control voltage
puls-coding
Wiring on the audio system of the studio
PE1 2 3 4 5
Control voltage
BCD-coding
Channel selection Channel selection