Extron electronic user manual Front Panel Controls, RAC 104 Installation and Operation

Front Panel Controls

AUDIO CONTROLS

A	B	ADJUSTMENTS
		VOL
1	3	BASS
2	4	TREBLE
		RAC 104
		VOLUME & TONE CONTROLLER

1 2 3 4

1

2

Power LED — Lights to indicate that the RAC 104 is on.

Channel selector buttons and LEDs — The RAC 104 has two channel selector buttons, one for channel group A (channels 1 and 2) and one for channel group B (channels 3 and 4). Press and release these buttons to select the channel(s) to adjust.

When a channel is selected, the corresponding LED lights.

Pressing the buttons repeatedly cycles through four possible selections:

Both LEDs on — both channels selected (tied, for stereo audio)

When both channels in a group are selected, they will be tied togther once the user turns the adjustment knob. The RAC 104 automatically sets both channels to the same volume and tone levels and any future changes will affect both channels simultaneously. To cancel a tie, press and release the channel selector button again and then turn the adjustment knob. See “Channel ties” in this chapter for more information.

LED 1 (or 3) on — mono channel 1 (or 3) or the left stereo channel selected

LED 2 (or 4) on — mono channel 2 (or 4) or the right stereo channel selected

Both LEDs off — no channel selected

Groups A and B cannot be adjusted at the same time. Pressing the button for one group will cause the LEDs for the other group to turn off.

RAC 104 • Installation and Operation 2-9