Extron electronic MLS 304MA ユーザーズマニュアル

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

• +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

Both the toggle switch

position and the

wiring must match the

down = 4 ohm or 8 ohm

direct connection

up = 70 V or 100 V

transformer

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.