Studer SW V4.0 OnAir 1000 Operating And Service Instructions page 146

OnAir 1000 Digital Mixing Console
14-18 Wiring and Hardware
CTRL (D-type, 9 pin, male):
This connector provides all the signals required for a guest headphone.
The "Phones OUT" signal is the same as the one on the GUEST jack
socket on the same PCB.
Pin Signal
5 1 Phones OUT left
9
4
2 GND
8
3
7
3 GND
2
6
4 Potentiometer wiper
1
5 +5 V SUPPLY
Notes: A linear 10 kΩ volume control potentiometer can be connected between
"+5 V SUPPLY" and "GND". The volume is maximum if the wiper volt-
age is at +5 V.
The signal on pins 1 and 6 is the same as the one on the GUEST head-
phones jack socket.
SW V 4.0
Pin
100 Ω
+5 V
Pot. wiper
120 Ω
120 Ω
Signal
6 Phones OUT right
7 n.c.
8 n.c.
9 n.c.
↑ level max.
5 +5 V SUPPLY
4 Pot. wiper
3 GND
↓ level min.
1 Phones OUT left
2 GND
6 Phones OUT right
Date printed: 23.10.03
10 k Ω , lin.