Telex Q II - FOH specifications Q2 Panning

Q2 PANNING

The Q2 console can exploit either L-R panning or L-C-R panning selected by a switch. In either case the same components are employed as follows.

The pan pot VR7 is centre tapped and under normal operation the input signal is fed to the top of the pot (the hot end). This is connected to the centre tap by a 10k resistor to give the appropriate law and the wiper signals are fed to the pan buffer IC9. These signals leave the module as LSUB or RSUB to give normal stereo panning. The MIXC output is directly connected to the (mono) input of the pan pot. The CGROUP output is grounded.

If the switch is depressed to give L-C-R panning then the centre taps of the pots are grounded meaning that the pots will only work across half of their range which is the required condition. The signal can now leave as LSUB or RSUB or indeed PANL and PANR if link 22 is installed in an LCR console. The output of the pan buffers are combined by IC10A along with an out of phase feed of the input signal to give a centre signal which is fed out as CGROUP or MIXC.

A signal panned fully left will appear at the LEFT output only, a CENTRE panned signal will appear on the centre output only and of course a RIGHT panned signal will appear on the right output only. A signal panned for example between left and centre will have no output on the right output whereas it would if normal stereo panning was employed.

Q2 OPERATIONAND MAINTENANCE MANUAL 9601 70