Dateq CREW Manuale d'uso - Pagina 8
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Dateq Crew Manual
Zone volume control
By means of this input the volume of an external zone can be adjusted. The volume control can be
connected in two different ways:
Supplying an external voltage
When a voltage is supplied between the tip and the shielding of one of the cinch-connectors the
volume will be attenuated (for both the left and the right channel). When a negative voltage is
supplied the signal will be amplified. The amplification ranges from +14...-80dB. The graph below
shows the amplification as function of the applied voltage:
20
10
0
-2
0
-10
-20
-30
-40
-50
-60
-70
-80
Voltage at 'volume control' (V)
Connecting a potentiometer
It is also possible to connect a potentiometer between the tip and the shielding to one of the cinch
connectors. The attenuation ranges from 0...-80dB. A 10kOhm logarithmically potentiometer gives
the best results. The next graph shows the attenuation as function of the angle of rotation:
90
80
70
60
50
40
30
20
10
0
0
10
20
additional output zones can be connected.
When an adjustable attenuation is not necessary a cinch connector with a short-circuit between the
tip and shield must be connected. When the input is left open the volume will be fully attenuated.
2
4
6
30
40
50
60
Rotation angle potentiometer (%)
Connections
8
10
70
80
90
100
7
As a maximum four