Extron electronic MVX 88 Series Example 8 Adjust the input audio gain, = unlit, = blinking LED

PRELIMINARY

Operation, cont’d

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.

N• 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-volatilememory. 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. Press and hold the Audio Setup (I/O) button for approximately 2 seconds (figure 3-31) until the Audio Setup LED lights.

Press and hold the button.

	2 seconds
AUDIO SETUP	AUDIO SETUP

The LED lights to indicate Audio Setup mode.

Release the Audio Setup button.

Figure 3-31 — Select Audio Setup mode

2. Press and release the Input 5 button (figure 3-32).

10	6	3	0	3	+
		VU

Press and release the Input 5 button.

	INPUTS				OUTPUTS
4	5	6	1	2	3	4
							+dB
							-dB
The Input 5 LED lights to			The Output 1, Output 2, and Output 3				The +dB LED indicates
indicate that input 5 is selected.			LEDs display input 5's audio level range.				a gain (positive) level.
		In this example, the LEDs indicate gain in the +6 dB to +10 dB range.
= lit,	= unlit, = blinking LED

Figure 3-32 — Select an input

A VU meter connected to output 1 indicates that the adjusted level is approximately +9 dB above the –10 dBV internal level.

The power LED lights steadily or blinks off only occasionally to indicate that the adjusted level is too high.

If the +dB and –dB LED are both lit they indicate an input gain of 0 dB. Otherwise, you can determine the exact gain or attenuation using the following procedure:

3-20 MVX 44 / 48 / 84 / 88 VGA Matrix Switchers • Operation