Extron electronic MLS 103 V - Manual (Page 11)

MediaLink VersaTools Switchers • Installation MediaLink VersaTools Switchers • Installation
Installation, cont’d
Gain and attenuation are adjustable (from -18dB to +24dB) for
each input (1 through 4) via RS-232 control only (using
HyperTerminal, a third party controller, or the MediaLink
Control Software). The gain and attenuation for the Aux/Mix
input are adjustable only via the switcher’s front panel. (See
page 3-3 for Aux/Mix details.)
Setup via the MediaLink Control Software
To avoid damage to your hearing, the output
volume should be set as low as possible before you
test the sound system.
1. Cable and power on all the equipment.
2. Start the MediaLink Control Software (see page 4-7), and
select the Switcher (MLS) Config portion of the program
(the second tab from the left).
3. Select an audio input. See the picture below for an
example.
4. Use the following table to determine the gain or
attenuation. Match the desired level for balanced output
or for unbalanced output, depending on how the output
connector is wired.
Gain and Attenuation Settings for MLS 100 Series Switchers
Desired Output Levels
Balanced
+4dBu 0dB -4dB -12dB -22dB
0dB
0dB
0dB
+6dB
+4dB -8dB -18dB
+8dB +12dB
10dB +18dB +22dB
-10dB
+10dB +6dB
+6dB
+6dB
+2dB -6dB -16dB
-2dB -12dB
+18dB +14dB
+16dB n.a. +24dB
-4dB
+4dBu
0dBu
0dBu
-10dBV
(-8dBu)
-10dBV
(-8dBu)
-20dBV
(-18dBu)
-20dBV
(-18dBu)
+4dBu 0dBu
-10dBV
(-8dBu)
-20dBV
(-18dBu)
Input Sour
ce
Levels
Unbalanced
If you wire an audio output for balanced output, the
MLS will output a unity signal (input level = output
level). If you wire an audio output for unbalanced
output, it causes the audio signal to be attenuated by
6dB (gain = -6dB).
For dBV the reference is 1 volt.
For dBu the reference is 0.775 volts.
5. In the control program, move the Audio Input Level slider
to select the gain/attenuation for that input,
as shown at left.
6. Repeat steps 3–5 for the other three inputs.
7. Test the system by listening to audio output for each input.
Start by setting the audio output set to the lowest level.
7a. If the audio output is too loud or is clipping
(becoming distorted as the loudest parts are cut off),
decrease the gain for that input.
7b. If the output is too soft or inaudible, increase the gain.
2-10
DVD
Video
Audio
VCR
Amplifier
Speakers
MLS 100 A
L R
A B
L R
L R
L R 1 2 3 L R 4
AUX/MIX MONO
AU DIO INPUTS
OUT
CO NT RO L/
PO W ER
12V .5A M
AX
Extron
MLS 100 A
MediaLink
Switcher
Extron
MLC 206
MediaLink
Controler
Extr on
Me dia Lin k C on tro lle r ML C 2 06 DISP LAY PO W ER
VOLUME
MAX / MIN
VCR
DVD
Laptop
LCD Projector
Application Diagrams
2-11