Extron electronic MLS 304SA, MLS 304MA User Manual

MEDIALINK

MLS 304MA &

MLS 304SA

FOUR INPUT MEDIALINK™SWITCHERS WITH

MONO OR STEREO AUDIO AMPLIFIER

■ Four inputs for composite video,
computer-video, and audio
switching

■ 280 MHz (-3 dB) video bandwidth

■ Integrated mono (MLS 304MA) or

stereo (MLS 304SA) amplifier

■ Triple-Action Switching

■ Front panel security lockout

■ RS-232 control

■ Rack-mountable

™

MLS 306SA

The Extron MLS 304MA and MLS 304SA MediaLink™Switchers provide

composite video, computer-video, and stereo audio switching and amplifier.

ith four inputs and a compr

W

304SA ar

envir

e economical and easy-to-use solutions for single-pr

onments such as small classr

ehensive feature set, the MLS 304MA and MLS

ojector

ooms and boardrooms.

www

.e

xtr

on.com

FEATURESDESCRIPTION

The Extr

on

MLS 304MA and MLS 304SA MediaLink™Switchers ar

e
simple-to-use, four input, multi-format active switchers with audio
amplifiers. Designed as economical solutions for single-projector
classrooms and conference rooms, both models provide composite
video, computer

-video, and audio switching.

The MLS 304MA and MLS 304SA include two inputs for composite
video with ster

eo audio on RCA connectors and two inputs for

computer-video with stereo audio on 15-pin HD connectors and

3.5 mm ster

eo mini jacks. Inputs three and four, both on 15-pin HD
connectors, are also configurable for computer-video, as well as
composite video. The switchers are equipped with dual RGB outputs.
One is on five BNC connectors and the other is on a 15-pin HD
connector. The 15-pin HD connector can also be utilized as a
buffered loop-through of input number 4 for a local monitor,
eliminating the need for a distribution amplifier and simplifying
operations.

MediaLink Switchers are designed to be used in conjunction with a
MediaLink Controller to facilitate low-cost integration. They can also
be used as stand-alone switchers.

Audio

For audio, each switcher includes two line level outputs (one fixed
and one variable) that can be configured for mono or stereo output
via RS-232. The MLS 304MA provides a 20 watt (rms) amplified
mono audio output on screw terminal for a 4 or 8 ohm load or
70/100 volt distributed audio system.

The MLS 304SA provides 24 watts (2 x 12 watts rms) for 4 ohm
speakers and 16 watts (2 x 8 watts rms) for 8 ohm speakers. Like the
line level outputs, the integrated audio amplifier can be configured
for stereo (default) or dual mono output via RS-232.

■ High

bandwidth –

280 MHz (-3 dB) RGB video bandwidth

maintains signal integrity.

■ Flexible video and ster

eo audio inputs –

Inputs one and two
accept composite video and stereo audio, and are on RCA
connectors. Inputs three and four accept computer-video or
composite video and stereo audio, and are on female 15-pin HD
and 3.5 mm ster

eo mini jacks.

■ Versatile video outputs – The MLS 304MA and MLS 304SA

include dual RGB outputs. One is on five BNC connectors and the
second is on a female 15-pin HD connector. The 15-pin HD can
also be utilized as a buffered local monitor loop-through for the
signal connected to input four.

■ Balanced audio – Balanced or unbalanced audio is output on

captive screw connectors. The two line level outputs (one fixed
and one variable) can be set for mono or stereo.

■ Integrated audio amplifier – The MLS 304MA provides 20 watt

(rms) amplified mono audio output on captive screw terminals for
a 4 or 8 ohm load or 70/100 volt distributed audio system. The
MLS 304SA provides 24 watts (2 x 12 watts rms) for 4 ohm
speakers and 16 watts (2 x 8 watts rms) for 8 ohm speakers.

■ Auxiliary/Mix audio – An additional input accepts mono line

level audio signals for mixing with any of the four switchable
inputs.

■ Volume control – Adjustable locally from the front panel or

remotely when integrated with a MediaLink Controller or a third
party RS-232 based control system.

MLS 304MA

MediaLink Switcher with
integrated mono amplifier

The MLS 304 switchers can
be used as a stand-alone
switcher, or combined with
the MediaLink family
Controller to create an
affordable system
integration solution.

MLC 206

MediaLink Controller

■ Loudness control – A unique audio feature of the MLS 304MA

and MLS 304SA that compensates for the nor

mal decr

eased
hearing ability of the human ear at low volume levels by
automatically boosting the low and high frequencies.

■ Triple-Action Switching™(RGB delay) – Blanks the screen

during switching of RGB signals to eliminate visible switching
transitions.

ont panel security lockout –

■ Fr

Allows security lockout of fr

ont

panel buttons and/or volume adjustment.

■ Remote control – The MLS Series Switchers are designed to work

with a MediaLink Controller. They can also be controlled via the
front panel or any third-party RS-232 based control system.

■ Rack-mountable – The MLS 304MA and MLS 304SA are housed

in a 1U, full rack width metal enclosure.

■ Inter

nal inter

national power supply

Extron Electronics, USA

1230 South Lewis Street
Anaheim, CA 92805

800.633.9876 714.491.1500 
FAX [phone]

Extron Electronics, Europe

Beeldschermweg 6C
3821 AH Amersfoort, The Netherlands
+800.3987.6673 +31.33.453.4040
FAX [phone]

Extron Electronics, Asia
135 Joo Seng Rd. #04-01
PM Industrial Bldg., Singapore 368363
+800.7339.8766 +65.6383.4400 
FAX [phone]


Extron Electronics, Japan
Daisan DMJ Bldg. 6F, 3-9-1 Kudan Minami
Chiyoda-ku, Tokyo 102-0074 
Japan
+81.3.3511.7655 FAX [phone]

RS-232/MLC/IR

Tx

Rx

IR

12V

A

B

C

PREAMP

100-240V

1.0A MAX.

50-60Hz

AUD

IO INPUTS

LINE LEVEL

MONO

AUD

IO

AUD

IO

LINEOUT

AUX

/MIX

ADJUST

-42dB
TO

+24dB

L

R

L

R

R

1

2

INPUTS

OUTPUTS

VIDEO

H

V

B

G

R

1

2

INPUTS

MONITOR OUT

5

6

RIGHT

LEFT

AMPLIFIED OUTPUT

RS-232 Control

4/8 ohm Stereo

or Dual Mono Output

Projector Control

Extron
MLC 226 IP

MediaLink Controller

R

Extron
MLS 304SA

MediaLink Switcher

Laptop

w/ Audio

or

Projector

VCR

Extron

MLC 226

PROJECTOR

1

2

3

4

5

6

VOLUME

CONFIG

IR

M

e

d

i

a

L

i

n

k

C

o

n

t

r

o

l

l

e

r

PC

AUX
VIDEO

DVD

VCR

DOC
CAM

LAPTOP

AUT

O

IMAGE

MUTE

ON

OFF

PC

APPLICATION DIAGRAM

MLS 304MA

MediaLink Switcher

VOLUME

MAX

MID

MIN

INPUT SELECT

1

2

3

4

AUDIO INPUTS

LINE LEVEL

MONO

AUDIO

AUDIO

AUX/MIX

ADJUST

-42dB
TO

+24dB

L

R

L

R

1

2

INPUTSOUTPUTS

VIDEO

H

V

B

G

R

1

2

INPUTS

3

4

MONITOR OUT

LINEOUT

100-240V

1.0A MA

X.

50-60Hz

RS-232/MLC/IR

Tx

Rx IR

12V

A

B

C

PREAMP

AMPLIFIED OUTPUT

20 WATTS MONO

DIRECT

XFMR

COM

4/8 ohm

100V

70V

MLS 304SA

MediaLink Switcher

VOLUME

MAX

MID

MIN

INPUT SELECT

1

2

3

4

AUDIO INPUTS

LINE LEVEL

MONO

AUDIO

AUDIO

AUX/MIX

ADJUST

-42dB
TO

+24dB

L

R

L

R

1

2

INPUTSOUTPUTS

VIDEO

H

V

B

G

R

1

2

INPUTS

3

4

MONITOR OUT

LINEOUT

100-240V

1.0A MAX.

50-60Hz

RS-232/MLC/IR

Tx

Rx IR

12V

A

B

C

PREAMP

L

R

L

R

AMPLIFIED OUTPUT

4/8 ohm

RIGHT LEFT

STEREO OR DUAL MONO

CLASS 2 WIRING

PANEL DRAWINGS

MLS 304 MA (Front)

MLS 304 MA (Back)

MLS 304 SA (Fr

MLS 304 SA (Back)

ont)

© 2004 Extron Electronics. All rights reserved. All trademarks mentioned are the property of their respective owners.

04-05
68-842-01
REV. B

SPECIFICATIONS

VIDEO

Gain...................................................... Unity

Bandwidth

Differential phase error.......................... 1.0º at 3.58 MHz and 4.43 MHz

Differential gain error............................ 1.0% at 3.58 MHz and 4.43 MHz

Crosstalk .............................................. -68 dB @ 10 MHz, -39 dB @ 100MHz

Switching speed.................................... 5 ms (max.)

............................................ 280 MHz (-3 dB)

VIDEO INPUT AND LOOP-THROUGH

Number/signal/connectors.................... 2 RGBHV, RGBS, RGsB, RsGsBs on 15HD

Nominal level

Impedance............................................ 75 ohms

Horizontal frequency ............................ 15 kHz to 145 kHz

Vertical frequency.................................. 30 Hz to 170 Hz

Return loss

........................................ 1 V p-p for composite 0.7 V p-p for RGB

RGB.................................................. <-40 dB @ 5 MHz

Composite video.............................. <-40 dB, 0 to 10 MHz

1 RGBHV, RGBS, RGsB, RsGsBs local monitor
loop-through on 15HD
2 composite video on RCA

VIDEO OUTPUT

Number/signal/connectors.................... 1 RGBHV, RGBS, RGsB, RsGsBs on BNCs

Nominal level........................................ 1 V p-p for composite video, 0.7 V p-p for RGB

Impedance............................................ 75 ohms

Return loss ............................................ <-40 dB @ 5 MHz

Switching type...................................... Triple-Action (RGB delay)

1 composite video on BNC

SYNC

Input/output type ................................ RGBHV, RGBS, RGsB, RsGsBs (follows input)

Standards.............................................. TTL (RGB), NTSC 3.58, NTSC 4.43, PAL, SECAM

Input level ............................................ 0.5 V to 5.0 V p-p

Output level.......................................... TTL: 5.0 V p-p, unterminated

Input impedance .................................. 510 ohms

Output impedance................................ 75 ohms

Max input voltage ................................ 5.0 V p-p

Max. propagation delay........................ 30 ns

Max. rise/fall time ................................ 4.0 ns

Polarity.................................................. Positive or negative (follows input)

AUDIO

......................................................

Gain
Fr

THD + Noise

S/N at maximum power output (unweighted)

Crosstalk .............................................. <-80 dB @ 1 kHz, fully loaded

Stereo channel separation .................... >80 dB @ 1 kHz

CMRR.................................................... >75 dB @ 20 Hz to 20 kHz

esponse

equency r

Preamp/Lineout .............................. 20 Hz to 20 kHz, +0 dB/-0.15 dB

Direct (4/8 ohm).............................. 20 Hz to 20 kHz, +0 dB/-0.5 dB @ 1 W

Transformer (70V mono amplifier)...... 50 Hz to 20 kHz, +0 dB/-0.3 dB @ 1 W

Transformer (100V mono amplifier) .... 50 Hz to 20 kHz, +0 dB/-3 dB @ 1 W

Power amp (mono or stereo)

8 watts/8 ohms ........................ <0.05% @ 1 kHz, 20 kHz bandwidth

12 watts/4 ohms ...................... <0.25% @ 1 kHz, 20 kHz bandwidth

Preamp/Lineout .............................. <0.07% @ 1 kHz, 20 kHz bandwidth

Power amp ...................................... >80 dB @ 10 Hz to 22 kHz

Preamp/Lineout .............................. >90 dB @ 10 Hz to 22 kHz

Unbal. output: 0dB; bal. output: +6dB

AUDIO INPUT

Number/signal/connectors.................... 2 stereo, unbal. line level on RCA (input 1-2)

Impedance............................................ >10 kohms unbal., DC coupled

Nominal level........................................ -10 dBV (316 mVrms)

Maximum level .................................... +8 dBV (2.51 Vrms), unbal. at <0.1%THD+N

2 stereo, unbal. line level on 3.5 mm TRS
(input 3-4)
1 mono, bal./unbal. line level on 3.5 mm captive
screw (aux/mix input)

+10 dBu (2.45 Vrms), bal. at <0.1% THD+N

Input gain adjustment .......................... -42 dB to +24 dB, adjustable per input

NOTE: 0 dBu = 0.775 V

rms, 0 dBV = 1 Vrms, 0 dBV ≈ 2 dBu

AUDIO OUTPUT — LINEOUT AND PREAMP

Number/signal/connectors.................... 1 stereo/mono, bal./unbal. line level on 3.5 mm

Impedance............................................ 50 ohms unbal., 100 ohms bal.

Nominal level........................................ Configurable: -10 dBV (316 mVrms, default), +4

Power amp (mono or stereo) .......... >+17 dBu, bal. <0.5% THD+N

Preamp ............................................ >+19 dBu, bal. <0.1% THD+N

Lineout ............................................ >+16 dBu, bal. <0.1% THD+N

NOTE: Unbal. wired outputs produce 6 dB of attenuation. Bal. outputs have unity

gain/attenuation.

AUDIO OUTPUT —

Number/signal/connector .................... 1 mono on 5-position screw terminal

Sensitivity @ max power ...................... -20 dBV (100 mVrms) (adjustable)

Power bandwidth

Direct (4 ohm)................................ 20 Hz to 20 kHz, 0.5% THD

Direct (8 ohm)................................ 20 Hz to 20 kHz, 0.15% THD

Transformer (70V) .......................... 50 Hz to 20 kHz, 1% THD

Transformer (100V) ........................ 50 Hz to 20 kHz, 0.5% THD

Maximum power output

Direct (4/8 ohm) ............................ 20 watts max. (rms)

Transformer (70/100V) .................. 16 watts max. (rms), transformer coupled

Protection ............................................ Input limiting, thermal, short circuit

AUDIO OUTPUT —

Number/signal type .............................. 1 stereo (default) or dual mono (configured via

Sensitivity @ max. power ...................... -20 dBV (adjustable)

Power bandwidth at maximum power output

Direct (4 ohm)................................ 10 Hz to 20 kHz, 0.5% THD

Direct (8 ohm)................................ 20 Hz to 20 kHz, 0.8% THD

Maximum power output

Direct (4 ohm)................................ 24 watts max., (12 watts rms per channel)

Direct (8 ohm)................................ 16 watts max., (8 watts rms per channel)

Protection.............................................. Input limiting, thermal, short circuit

captive screw (lineout)
1 stereo/mono, bal./unbal. variable level on

3.5 mm captive scr

dBu (1.23 Vrms) Maximum level (600 ohm)

MONO POWER AMP (MLS 304MA, ONLY)

STEREO POWER AMP (MLS 304SA, ONLY)

software) on 5-position screw terminal

ew (preamp)

CONTROL/REMOTE — SWITCHER

t.................................. RS-232, 3.5 mm captive screw connector, 5 pole

Serial contr

Baud rate and pr
Pr

ol por

ogram contr

ol

(uses 3 poles)

..........................

otocol

....................................

9600, 8-bit, 1 stop bit, no parity
Extr
Extr

on’s configuration program for Windows

s Simple Instr

on’

uction Set (SIS)

™

®

GENERAL

....................................................

Power

Rack mount
Metal Enclosur

Pr
Shipping weight
Listings
Compliances

NOTE: All nominal levels ar

Model

MLS 304MA
MLS 304SA

..........................................

e dimensions

oduct weight

......................................

....................................

..................................................

..........................................

..........................................

............................................

..................

±

e at

AC to 240 V

100 V

nal, autoswitchable

inter

es, with included brackets (#70-077-03)

Y

1.75" H x 17.5" W x 8.5" D 4.4 cm H x

44.4 cm W x 21.6 cm D

6.0 lbs (2.7 kg)
11 lbs (5 kg)
UL, CUL
CE, FCC Class A, VCCI, AS/NZS, ICES

10%.

t Numbers

Par

60-550-01
60-550-02

AC, 50/60 Hz, 60 watts,

Specifications ar

e subject to change without notice.