Extron electronic MVX 44 series - Manual (Page 34)

Operation, cont’d
MVX 44 / 48 / 84 / 88 VGA Matrix Switchers • Operation 3-18
2 . Press and release the Input 1 button (figure 3-29).
All LEDs but Input 1 and the Preset LED go out. The Input 1 LED and Preset
LED remain lit for 1 second to indicate the recalled preset number and then go
out.
2 1 3
2 1
INPUTS
3 PRESET 3 4
OUTPUTS
Press and release the Input 1 button to select preset 1.
Preset 2 Preset 3
The LED for the recalled preset and the Preset LED
remain lit for 1 second then go out.
All LEDs except the recalled preset's LED go out.
Figure 3-29 — Select the preset, MVX 48
Adjusting input audio gain and attenuation
Audio/video switchers have input audio gain and attenuation adjustments. In
Audio Setup mode the audio gain or attenuation of each input can be adjusted
through a range of –18 dB to +10 dB. This adjustment range ensures that there is no
noticeable volume difference among sources. It also eliminates the need for
separate preamps or attenuators when used with professional (higher line level)
and consumer (lower line level) audio equipment (figure 3-30).
Audio
Inputs
Audio
Inputs
Laptop
No noticeable volume
differences between sources
Audio System
Computer
+2
-1
-3
-7
-10
-14
Low Audio
Output Level
+5
+8
+4
+1
-2
-5
-8
-12
-20 -18
+7
+10
+2
-1
-4
-7
-10
-14
Output
Level
+5
+8
+4
+1
-2
-5
-8
-12
-20 -18
+7
+10
dBv dBu
High Audio
Output Level
dBv dBu
+2
-1
-3
-7
-10
-14
+5
+8
+4
+1
-2
-5
-8
-12
-20 -18
+7
+10
dBv dBu
MVX VGA A Series Switcher
DAS101 CM
DAV101CM VGA LINE DRIVER
VIDEO INPUT POWER
MVX SERIES
VGA/AUDIO MATRIX SWITCHER I/O
AUD AUDIO SETUP
PRESET
VID IR +dB - dB
ENTER 2 7 6 5 2 4 1 INPUTS OUTPUTS 8 3 1 8 6 5 4 3 7
Figure 3-30 — Audio gain and attenuation