Extron electronic MAV 84, MAV 88, MAV 44, MAV 48 Example 8 Adjust the input audio gain, Seconds

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 3-32) 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 3-32 — Select Audio Setup mode

2. Press and release the Input 5 button (figure 3-33).

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

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.

Figure 3-33 — Select an input

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.

a. If one or more output LEDs are lit AND the +dB LED is lit, press and release the button repeatedly until the highest-numbered lit output LED goes out. Count the button presses. In example 8, assume a value of +8 dB. It takes three presses of the button for the Output 1 LED to go out.

If one or more output LEDs are lit AND the –dB LED is lit, press and release the button repeatedly until the highest-numbered lit output LED goes out. Count the button presses.

If the +dB LED is lit and NO output LEDs are lit, press and release the button repeatedly until the +dB and –dB LED are both lit, indicating 0 dB. Count the button presses.

If the –dB LED is lit and NO output LEDs are lit, press and release the button repeatedly until the +dB and –dB LED are both lit, indicating 0 dB. Count the button presses.

MAV 44 / 48 / 84 / 88 Matrix Switchers • Operation 3-21