Peavey Century Series owner manual Special Facilities contd, LCR Panning, Stereo Program Input

CENTURY SERIES VX

Special Facilities (cont'd)

LCR PANNING

Operation of center-cluster sound systems requires panning channels between the Left and Right sides of the main stereo PA and between the stereo PA and the center system. Conventional panning systems allow for L-R panning but the center feed is either all on, full center, or all off, no center. In practice it is necessary to balance the different sound groups between center and sides. This requires LCR panning. Active circuits are combined with a special multi-section pot in the Input, Stereo Input and Group-to-mix pan sections of Vx con- soles.

INPUTS and GROUPS

LCR pan sections include an LCR enable selector. When in LCR mode, three outputs (Left, Right and Center) are derived from a single input.

Pan central	100% output to Center only
Pan hard left	100% output to Left only
Pan hard Right	100% output to Right only
Between hard left and center	progressively less left and
	more center output, no right
	output.
Between hard right and center	progressively less right and
	more center output, no left
	output.

Operation of LCR panning requires the L-R and M (mono or center) assign switches to be selected and the LCR switch selected.

The monitoring section of the console allows the center mix to be added to the stereo mix in headphones for checking purpos- es.

STEREO CHANNELS

LCR panning is provided by the Balance section of the Width/Balance control.

Select the LCR switch and the L-R and Mono audio assign switches. Now the inner control 'Balance' operates as an LCR panpot:

Fully counter-clockwise = full level to L&R, none to center, 50% rotation = equal levels to L, R & Center outputs, Fully clockwise = full level to center, no signal to L&R

STEREO PROGRAM INPUT

(located above the MONO Master)

Connections are provided on the rear panel for stereo input to the Mixes, Auxiliaries and Matrix outputs. Use this section for music playback or special return input. Access to the Matrix outputs is direct, bypassing the groups. On each Matrix that requires Stereo input select the switch next to the level control pot 'L-R / STR PGM'.

Stereo Program audio from the rear XLR connectors also pass- es to switching contacts on the TAPE INPUT 1/4 inch sockets. When nothing is plugged into the TAPE sockets Stereo Program audio passes to the TAPE monitor source switch.

VCA GROUP MUTES

Normally the operation of the VCA Group Mute commands all the channel VCAs in the group to close. The effect is that all output assignments are faded out, also the post-fader effects sends are faded. However pre-fader sends are un-affected. This may be satisfactory, it depends on the effects and monitor mix set-up at the time.

In a situation where a pre-fader send had to be muted with the channel then two possible options are available.

Use the local channel Mute switch to cut the pre-fader send, either individually or as part of a Mute Group.

Alternatively the console can be set so that VCA Group Mute sends a Mute command to the channel audio switch in addition to a fade command to the channel VCA.

This choice is called VCA Group Channel Mute option. It may be set up individually for each VCA Group by selection of an internal jumper link in the Group Output module.

When this is set up, then operation of a VCA Group Mute switch sends Mute commands to the channel mutes of all chan- nels in the VCA group. The result is to turn off the post-fader audio outputs to buses, effects etc, AND to mute the pre-fader sends.

This would be desireable if some of the pre-fader sends were being used for foldback or effects for example.

PAGE 25