Audio Gain and Attenuation Adjustments
Individual audio inputs can be adjusted over a range |
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of |
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button and program audio volume control knob. |
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These adjustments can be used to normalize | dB | |
the input audio levels so that output volume is | +24 | |
consistent for all inputs. | +23 | |
The front panel input LEDs provide a status of | +22 | |
+21 | ||
the current input gain/attenuation levels. When | ||
+20 | ||
adjusting the audio level, the LEDs used for inputs | ||
+19 | ||
+18 | ||
current audio level for the selected input as shown | +17 | |
in the table. | +16 | |
The LED input associated with video Input 2 | +15 | |
+14 | ||
functions as an indicator of gain (+) or attenuation | ||
+13 | ||
+12 | ||
at a positive level (gain). If the LED is on, audio is | ||
negative (attenuated). | +11 | |
To adjust the input audio level from | +10 | |
+9 | ||
the front panel: | +8 | |
1. Press and hold the Program Audio Mute AND | +7 | |
Mic mute buttons for 3 seconds. The two Mute | +6 | |
LEDs flash three times. | +5 | |
2. Press the input button for the audio to be | +4 | |
+3 | ||
adjusted. If no input button is pressed, the | ||
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switcher times out and exits audio level | +2 | |
adjustment mode. | +1 | |
3. Once the input button is pressed, the front | 0 | |
panel input LEDs indicate the current gain or | ||
attenuation setting. Factory default is 0 dB (all | ||
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LEDs off). Rotate the Program volume knob | ||
clockwise to increase and counterclockwise to | ||
decrease the audio level. The front panel LEDs | ||
display the level setting as the knob is adjusted. | ||
4. Once the desired level is achieved, to adjust | ||
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another input, select it within 3 seconds. If | ||
audio adjustments are complete: | ||
a. Do not press any front panel buttons for at | ||
least 3 seconds to exit the gain/attenuation | ||
mode, or | ||
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b. Press the program audio and Mic mute | ||
buttons to exit the gain/attenuation mode. | ||
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At any time during the adjustments, if front panel | ||
buttons are not pressed or the program knob is not | ||
rotated for 3 seconds, the switcher times out and | ||
the gain/attenuation mode is exited. |
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= on,
Front Panel LEDs
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| Input | Input | Input |
| Input Input |
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V |
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| DVI |
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| HDMI HDMI | HDMI | Video | Video |
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GA | GA |
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F | = blinking fast, |
| S = blinking slowly, | = off | |||||||||||||||
MPS 409 • Operation | 16 |
