Extron electronics MVC 121 Plus, User Manual, Page: 17 / 60

MVC 121 Plus • Installation 9
7
Volume level adjust knob — Rotating the adjustment knob
VOLUME
MIXER/VOLUME CONTROLLER
MVC 121 Plus
clockwise increases the output volume, rotating the knob
counterclockwise decreases the volume. The LEDs light from
bottom up as the volume level increases.
Use the rotary encoder to adjust the output volume from
0 (-100 dB) to 100% (0 dB). The default setting is 100% (0 dB).
The knob step adjustments are as follows:
Volume
Range (dB)
Knob Step
Adjustment (dB)
-100 to -70 +/- 5 dB
-70 to -30 +/- 3 dB
-30 to -20 +/- 2 dB
-20 to -0 +/- 1 dB
The degree to which the volume is incremented or decremented for each step the
volume adjust knob is turned, depends on the current volume setting.
As the volume increases or decreases, the LED bar lights to indicate the current volume
range, as shown in the table below. As the volume is increased or decreased within a
volume range, the top LED to be lit flashes once. If the knob is turned past maximum
volume, all 8 LEDs flash, for as long as the knob continues to be turned.
In the table below, turning the volume adjust knob (
7
) affects the volume range and
turning the input gain control screws (
3
,
4
,
5
affects the mix-point range).
LED
Level
Volume Range
(dB)
Mix-point
Range (dB)
8 -4 to -0 +7 to +12
7 -9 to -5 +1 to +6
6 -14 to -10 -3 to +0
5 -19 to -15 -7 to -4
4 -29 to -20 -11 to -8
3 -49 to -30 -15 to -12
2 -69 to -50 -19 to -16
1 -99 to -70 -23 to -20