Cadac CDC four User Manual download pdf (Page 38)

Revision 1 2012-13 CDC FOUR

Stereo inputs

A detailed block diagram of the Stereo Inputs may be found in the Appendix on

page 75.

The CDC FOUR has eight stereo line channels, with inputs on the rear panel.

The CAM and the TFT display are made active for a stereo channel when the

ST CHNS VCA layer is selected. The stereo channels are then controlled by

Faders 1 to 8, and that assigned to the CAM and TFT display is the one whose

SEL button is illuminated.

Analogue mixers generally offer a more limited set of controls on stereo channels

than on mono. This need not apply to a digital mixer, and on the CDC FOUR, a

stereo line channel has almost the same set of controls as a mono channel.

For this reason, only the differences from a mono channel are summarised

below. The description of the mono mic/line channel applies in all other respects.

Refer to Page 32 onwards for full details.

Input stage:

TRIM - input gain trim, range -48 to +12 dB. Default setting is 0 dB.

Phase reverse – reverses the phase in the left leg of the channel only.

Aux Sends:

In a stereo channel, a mono sum of left and right legs is fed to the auxiliary

busses. The send controls otherwise operate in an identical manner to those

in a mono channel. Post-fade sends are derived pre-balance control, but post-

Channel mute.

Routing and metering section:

The left and right legs of a stereo channel are fed to the L and R busses of the

main stereo mix via the pan control, which is recongured to operate as a stereo

balance control.

With the pan control IN button Off, pressing any of the group routing buttons 1

to 4 sends a mono sum of the left and right legs to that group; routing to multiple

groups will operate in the same way. If the pan IN button is On, stereo routing

to odd/even pairs of groups results. The stereo image set by the balance control

is maintained, with the left leg selectable to Groups 1 and 3, and the right leg to

Groups 2 and 4.

Pan – acts as a balance control; turning the control clockwise from the centre

position will attenuate the left leg of the channel but leave the right leg unaltered

in level. At the maximum, the left leg is fully attenuated. The opposite applies for

anticlockwise rotation.

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Cadac CDC four User Manual Page 38