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By noting the status of these LEDs and counting the number of 1 dB steps you
increase or decrease the audio level (step 4 and example 8, step 2a), you can
determine the exact input gain or attenuation setting.
b. The Power LED blinks to indicate the adjusted audio level (compared to the internal
level, -10 dBV):
• When the LED is lit most of the time, blinking off only occasionally, the level is
too high.
• When the LED is off most of the time, blinking on (lit) only occasionally, the
level is too low.
• When the LED blinks frequently, the level is in the proper range.
c. The
<
LED lights steadily when the adjustment is at the minimum level (maximum
attenuation, -18 dB). The
>
LED lights steadily when the adjustment is at the
maximum gain (+10 dB).
4. Press and release the
<
and
>
buttons to increase and decrease the audio level by 1 dB
or press and hold the buttons to increase or decrease the level by 3 dB per second.
The
<
or
>
LEDs flash to indicate each 1 dB level change.
NOTE: Each time you press the
<
or
>
button, wait for the
<
or
>
LED to flash
before pushing the button again. Pressing the button too rapidly may not
increment or decrement the audio level.
5. Press and release the Audio Setup button to save the level value in memory and to exit
Audio Setup mode. The Audio Setup LED turns off.
NOTES: • After approximately 30 seconds of front panel inactivity, the switcher
saves the most recent input gain or attenuation levels and exits Audio
Setup mode.
• There is one audio gain or attenuation setting per input. The setting is
shared by the left and right audio inputs.
• The input audio gain or attenuation settings are stored in non-volatile
memory. When power is removed and restored, the audio level settings
are retained.
Example 8: Adjust the input audio gain
The following steps show an example in which an input audio level is viewed and adjusted.
The example shows the front panel indications that result from your actions.
1. Select Audio Setup mode: Press and hold the Audio Setup (I/O) button for
approximately 2 seconds.
AUDIO SETUP AUDIO SETUP
The LED lights to indicate Audio Setup mode.
Release the Audio Setup button.
2 seconds
Press and hold the button.
MVX 44 / 48 / 84 / 88 VGA Matrix Switchers • Operation 24