Extron Electronics MAV Series - Manual (Page 13)

1-5 MAV Series Switchers • Introduction
Features
MAV 128 RCA model
Inputs — These switchers offer 12 NTSC 3.58, NTSC 4.43, PAL, and SECAM
composite video inputs on BNC connectors.
Unbalanced stereo audio is input on left and right RCA connectors.
Outputs — 4 or 8 composite video outputs are available on BNC connectors.
Unbalanced stereo audio is output on left and right RCA connectors.
Audio gain/attenuation — Users can set the input level of audio gain or
attenuation (-15dB to +9dB) via the RS-232/RS-422 link or from the front
panel. Individual input audio levels can be adjusted so there are no
noticeable volume differences between sources (figure 1-5).
Audio
inputs
Audio
inputs
VCR
No noticeable volume
differences between sources
Audio system
CD jukebox
MAV Series switcher
I/O CONTROL
MAV SERIES SWITCHER
VIDEO
0
-3
-6
-9
-12
-15
Low audio
output level
3
6
9
12
15
+4
+1
-2
-5
-8
-12
+7
+10
+13
+16
+19
VU dBu
0
-3
-6
-9
-12
-15
Output
level
3
6
9
12
15
+4
+1
-2
-5
-8
-12
+7
+10
+13
+16
+19
VU dBu
0
-3
-6
-9
-12
-15
High audio
output level
3
6
9
12
15
+4
+1
-2
-5
-8
-12
+7
+10
+13
+16
+19
VU dBu
Figure 1-5 — Audio gain and attenuation
Audio follow — Audio can be switched with the corresponding video input,
allowing any audio signal to be selected with any video signal
simultaneously to one or all outputs in any combination. Audio follow
switching can be done via front panel control or under RS-232/RS-422
remote.
Audio breakaway — Audio can be broken away from its corresponding video
signal. Audio breakaway switching can be done via front panel control or
under RS-232/RS-422 control.