Calrec S2 - Page 62

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S2
4.9 DIRECT OUTPUTS & MIX MINUS
Each channel & group has a Direct Output - at balanced line level with a gain control,
pre/post fader select and Talkback (momentary) select buttons. There is 10dB in hand
on the gain control. The pre button position may be internally selected to be pre eq or
pre fader.
Associated with the channel Direct Outputs are 2 mix minus systems. These are mono
and consist of 2 select buttons to 2 Buss (1 & 2) (internally selectable pre/post fader) and
2 select buttons to the Direct Output (1 & 2, 2 having priority over 1).
When a number of channels are connected to Bus 1 (for example) and one channel is
selected by button 1 to the O/P (Direct Output) then those channels so selected including
that selected to be the output mix together to that output.
If the channel selected to be an output is also making a contribution to the bus, then its
input is cancelled on the channel direct output.
This allows a whole matirx of channels to be set up in a MIX MINUS system where the
contribution from each channel is not heard on the channel Direct Output but all the other
channels are heard. The Direct Output would in this case be fed to a Studio Loudspeaker
with no contribution from the local microphone (due to the Mix Minus).
A group of studios are typically linked in this way where each studio hears contributions
from all other studios via the loudspeaker and his own contribution live without any howl
round paths.
It is possible using Busses 1 & 2 to set up 2 such matrices simultaneously. The mix minus
system may be internally selected to be pre or post fader.
4.10 TONE
A Tone oscillator is fitted to the console which can be set to a number of switched
frequencies:-
30Hz 100Hz 1KHz
10KHz 15KHz 20KHz
The output from the oscillator is 0dBu (balanced) at very low impedance (to avoid loading
effects) but this can be trimmed +_10dB.
There is a button to reduce the output level -60dB and another one to substitute PINK
NOISE.
The tone may be selected to all group Direct Outputs and to each Main Output and to
Multitrack outputs. On Main outputs the tone is injected after the DESK outputs and thus
appears only at the LINE outputs.
This allows rehearsal to continue by monitoring the Desk Outputs whilst sending an
alignment tone to Line.
Another button indicates a stereo identification system with sequences of short interrup-
tions which can be observed on the meters to confirm left and right. Further detail of this
is given in Section 5.6.
The Tone oscillator is immobilised when the ON-AIR button is selected even when switched
on.