Extron electronics MLS 304MA User Manual page 3

Quick Start — MLS 304MA, MLS 406, MLS 406MA
Installation
Step 1
Remove power from the switcher and the input,
output, and control devices.
Step 2
Install the rubber feet on the bottom corners or
rack mount the switcher.
Step 3
Connect input devices to the switcher. See
chapter 2 for details and wiring diagrams.
MLS 304MA
Inputs 1 and 2: composite video and audio
Inputs 3 and 4: RGB computer video or
composite video and audio
MLS 406, MLS 406MA
Inputs 1, 2, 3: S-video or composite video
and audio
Inputs 4, 5, 6: RGB computer video, S-video,
or composite video and audio
Aux/Mix audio input
Connect a mono audio source to mix a line-
level audio signal with the selected input's
audio. This channel is always active.
See chapters 3 and 4 for details on setting up the
audio and configuring video.
Step 4
Connect cables from the MLS's RGB, S-video,
and video output connectors to the inputs on the
display device.
Connect a cable between the Monitor Output
port and the local monitor.
N There are three modes (selectable only via
RS‑232 control) for determining which
input signal, if any, is sent to the
Monitor Output port. For an explanation
of modes and video routing, see Video
Signal Routing on page 3‑7. For
selecting the mode, see chapter 4, Serial
Communication.
Step 5
Connect a host computer to the RS-232/MLC/IR
control port (see Control Connection on page 2-6),
load and start the control software, set up the
video, select a Monitor Output mode, and select a
Lineout/Preamp output level.
Step 6
Adjust the audio (sensitivity) level for each input.
See Making adjustments on page 3-6.
Step 7
Connect audio devices to the Lineout and
Preamp audio outputs
• Lineout outputs a fixed, line level audio
signal not affected by Volume knob
adjustments.
• Preamp outputs a variable, line level audio
signal for use with powered speakers or an
amplifier. The volume can be attenuated via
the Volume knob or RS-232.
Lineout and Preamp outputs can be set up as
• -10 dBV (-8 dBu, 0.316 Vrms, default),
unbalanced, for consumer level devices
such as VCRs or stereo receiver-amplifiers
or
• +4 dBu (+6 dBV, 1.23 Vrms), balanced, for
professional level devices such as mixers
and power amplifiers
depending on how the connector is wired and
how the MLS is set up via RS-232 control.
Selecting mono or stereo (via RS-232) affects both
of these ports. See Audio outputs on pages 2-9
through 2-10.
Step 8
Connect a host computer, control system,
MediaLink Controller (MLC) and/or an Extron
IR Link to the RS-232/MLC/IR control port. See
Control Connection on pages 2-7 through 2-8.
Step 7
MLS 304MA, MLS 406MA
—
Connect speakers to the amplified output
(MLS 304MA, MLS 406MA) for mono audio out-
put. See pages 2-11 through 2-13 for diagrams.
Set the rear panel toggle switch to the desired
amplifier output type: transformer (Xfmr) (for a
70 V or 100 V system) or Direct (4 or 8 ohms).
NOTE
up = 70 V or 100 V
transformer
down = 4 ohm or 8 ohm
direct connection
This output provides a mono signal even if the
input is a stereo signal. For stereo output, use
the non-amplified Lineout and Preamp outputs
instead. See chapter 2, Installation.
Both the toggle switch
position and the
wiring must match the