Extron electronic MAV 48 ユーザーズマニュアル

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.

.

Press and hold the Audio Setup (I/O) button for approximately 2 seconds
(figure 3-32) until the Audio Setup LED lights.

The LED lights to indicate Audio Setup mode.

Release the Audio Setup button.

2 seconds

Press and hold the button.

Figure 3-32 — Select Audio Setup mode

.

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

The Output 1, Output 2, and Output 3 
LEDs display input 5's audio level range.

The +dB LED indicates
a gain (positive) level.

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

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

In this example, the LEDs indicate gain in the +6 dB to +10 dB range.

Press and release the Input 5 button.

The Input 5 LED lights to 
indicate that input 5 is selected.

= lit,      = unlit,      

= blinking LED

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.

.

, 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.

, press and

release the 

 button repeatedly until the highest-numbered lit output

LED goes out.  Count the button presses.

, press and release the

 button repeatedly until the +dB and –dB LED are both lit, indicating

0 dB.  Count the button presses.

, press and release the

 button repeatedly until the +dB and –dB LED are both lit, indicating

0 dB.  Count the button presses.