Extron electronic MAV 84, MAV 88, MAV 44, MAV 48 User Manual

MAV 44 / 48 / 84 / 88 Series

Matrix Switchers

68-777-01 Rev. D

10 07

Precautions

Safety Instructions • English

This symbol is intended to alert the user of important operating and maintenance
(servicing) instructions in the literature provided with the equipment.

This symbol is intended to alert the user of the presence of uninsulated dangerous
voltage within the product’s enclosure that may present a risk of electric shock.

Caution

Read Instructions • Read and understand all safety and operating instructions before using the equipment.
Retain Instructions • The safety instructions should be kept for future reference.
Follow Warnings • Follow all warnings and instructions marked on the equipment or in the user

information.

Avoid Attachments • Do not use tools or attachments that are not recommended by the equipment

manufacturer because they may be hazardous.

Consignes de Sécurité • Français

Ce symbole sert à avertir l’utilisateur que la documentation fournie avec le matériel
contient des instructions importantes concernant l’exploitation et la maintenance
(réparation).

Ce symbole sert à avertir l’utilisateur de la présence dans le boîtier de l’appareil
de tensions dangereuses non isolées posant des risques d’électrocution.

Attention

Lire les instructions• Prendre connaissance de toutes les consignes de sécurité et d’exploitation avant

d’utiliser le matériel.

Conserver les instructions• Ranger les consignes de sécurité afi n de pouvoir les consulter à l’avenir.
Respecter les avertissements • Observer tous les avertissements et consignes marqués sur le matériel ou

présentés dans la documentation utilisateur.

Eviter les pièces de fi xation • Ne pas utiliser de pièces de fi xation ni d’outils non recommandés par le

fabricant du matériel car cela risquerait de poser certains dangers.

Sicherheitsanleitungen • Deutsch

Dieses Symbol soll dem Benutzer in der im Lieferumfang enthaltenen
Dokumentation besonders wichtige Hinweise zur Bedienung und Wartung
(Instandhaltung) geben.

Dieses Symbol soll den Benutzer darauf aufmerksam machen, daß im Inneren des
Gehäuses dieses Produktes gefährliche Spannungen, die nicht isoliert sind und
die einen elektrischen Schock verursachen können, herrschen.

Achtung

Lesen der Anleitungen • Bevor Sie das Gerät zum ersten Mal verwenden, sollten Sie alle Sicherheits-und

Bedienungsanleitungen genau durchlesen und verstehen.

Aufbewahren der Anleitungen • Die Hinweise zur elektrischen Sicherheit des Produktes sollten Sie

aufbewahren, damit Sie im Bedarfsfall darauf zurückgreifen können.

Befolgen der Warnhinweise • Befolgen Sie alle Warnhinweise und Anleitungen auf dem Gerät oder in der

Benutzerdokumentation.

Keine Zusatzgeräte • Verwenden Sie keine Werkzeuge oder Zusatzgeräte, die nicht ausdrücklich vom

Hersteller empfohlen wurden, da diese eine Gefahrenquelle darstellen können.

Warning

Power sources • This equipment should be operated only from the power source indicated on the product. This

equipment is intended to be used with a main power system with a grounded (neutral) conductor. The
third (grounding) pin is a safety feature, do not attempt to bypass or disable it.

Power disconnection • To remove power from the equipment safely, remove all power cords from the rear of

the equipment, or the desktop power module (if detachable), or from the power source receptacle (wall
plug).

Power cord protection • Power cords should be routed so that they are not likely to be stepped on or pinched by

items placed upon or against them.

Servicing • Refer all servicing to qualifi ed service personnel. There are no user-serviceable parts inside. To

prevent the risk of shock, do not attempt to service this equipment yourself because opening or removing
covers may expose you to dangerous voltage or other hazards.

Slots and openings • If the equipment has slots or holes in the enclosure, these are provided to prevent

overheating of sensitive components inside. These openings must never be blocked by other objects.

Lithium battery • There is a danger of explosion if battery is incorrectly replaced. Replace it only with the

same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the
manufacturer’s instructions.

Avertissement

Alimentations• Ne faire fonctionner ce matériel qu’avec la source d’alimentation indiquée sur l’appareil. Ce

matériel doit être utilisé avec une alimentation principale comportant un fi l de terre (neutre). Le troisième
contact (de mise à la terre) constitue un dispositif de sécurité : n’essayez pas de la contourner ni de la
désactiver.

Déconnexion de l’alimentation• Pour mettre le matériel hors tension sans danger, déconnectez tous les cordons

d’alimentation de l’arrière de l’appareil ou du module d’alimentation de bureau (s’il est amovible) ou
encore de la prise secteur.

Protection du cordon d’alimentation • Acheminer les cordons d’alimentation de manière à ce que personne ne

risque de marcher dessus et à ce qu’ils ne soient pas écrasés ou pincés par des objets.

Réparation-maintenance • Faire exécuter toutes les interventions de réparation-maintenance par un technicien

qualifi é. Aucun des éléments internes ne peut être réparé par l’utilisateur. Afi n d’éviter tout danger
d’électrocution, l’utilisateur ne doit pas essayer de procéder lui-même à ces opérations car l’ouverture ou le
retrait des couvercles risquent de l’exposer à de hautes tensions et autres dangers.

Fentes et orifi ces • Si le boîtier de l’appareil comporte des fentes ou des orifi ces, ceux-ci servent à empêcher

les composants internes sensibles de surchauffer. Ces ouvertures ne doivent jamais être bloquées par des
objets.

Lithium Batterie • Il a danger d’explosion s’ll y a remplacment incorrect de la batterie. Remplacer uniquement

avec une batterie du meme type ou d’un ype equivalent recommande par le constructeur. Mettre au reut les
batteries usagees conformement aux instructions du fabricant.

Vorsicht

Stromquellen • Dieses Gerät sollte nur über die auf dem Produkt angegebene Stromquelle betrieben werden.

Dieses Gerät wurde für eine Verwendung mit einer Hauptstromleitung mit einem geerdeten (neutralen)
Leiter konzipiert. Der dritte Kontakt ist für einen Erdanschluß, und stellt eine Sicherheitsfunktion dar. Diese
sollte nicht umgangen oder außer Betrieb gesetzt werden.

Stromunterbrechung • Um das Gerät auf sichere Weise vom Netz zu trennen, sollten Sie alle Netzkabel

aus der Rückseite des Gerätes, aus der externen Stomversorgung (falls dies möglich ist) oder aus der
Wandsteckdose ziehen.

Schutz des Netzkabels • Netzkabel sollten stets so verlegt werden, daß sie nicht im Weg liegen und niemand

darauf treten kann oder Objekte darauf- oder unmittelbar dagegengestellt werden können.

Wartung • Alle Wartungsmaßnahmen sollten nur von qualifi ziertem Servicepersonal durchgeführt werden.

Die internen Komponenten des Gerätes sind wartungsfrei. Zur Vermeidung eines elektrischen Schocks
versuchen Sie in keinem Fall, dieses Gerät selbst öffnen, da beim Entfernen der Abdeckungen die Gefahr
eines elektrischen Schlags und/oder andere Gefahren bestehen.

Schlitze und Öffnungen • Wenn das Gerät Schlitze oder Löcher im Gehäuse aufweist, dienen diese zur

Vermeidung einer Überhitzung der empfi ndlichen Teile im Inneren. Diese Öffnungen dürfen niemals von
anderen Objekten blockiert werden.

Litium-Batterie • Explosionsgefahr, falls die Batterie nicht richtig ersetzt wird. Ersetzen Sie verbrauchte

Batterien nur durch den gleichen oder einen vergleichbaren Batterietyp, der auch vom Hersteller
empfohlen wird. Entsorgen Sie verbrauchte Batterien bitte gemäß den Herstelleranweisungen.

Instrucciones de seguridad • Español

Este símbolo se utiliza para advertir al usuario sobre instrucciones importantes
de operación y mantenimiento (o cambio de partes) que se desean destacar en el
contenido de la documentación suministrada con los equipos.

Este símbolo se utiliza para advertir al usuario sobre la presencia de elementos con
voltaje peligroso sin protección aislante, que puedan encontrarse dentro de la caja
o alojamiento del producto, y que puedan representar riesgo de electrocución.

Precaucion

Leer las instrucciones • Leer y analizar todas las instrucciones de operación y seguridad, antes de usar el

equipo.

Conservar las instrucciones • Conservar las instrucciones de seguridad para futura consulta.
Obedecer las advertencias • Todas las advertencias e instrucciones marcadas en el equipo o en la

documentación del usuario, deben ser obedecidas.

Evitar el uso de accesorios • No usar herramientas o accesorios que no sean especifi camente recomendados

por el fabricante, ya que podrian implicar riesgos.

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Advertencia

Alimentación eléctrica • Este equipo debe conectarse únicamente a la fuente/tipo de alimentación eléctrica

indicada en el mismo. La alimentación eléctrica de este equipo debe provenir de un sistema de distribución
general con conductor neutro a tierra. La tercera pata (puesta a tierra) es una medida de seguridad, no
puentearia ni eliminaria.

Desconexión de alimentación eléctrica • Para desconectar con seguridad la acometida de alimentación eléctrica

al equipo, desenchufar todos los cables de alimentación en el panel trasero del equipo, o desenchufar el
módulo de alimentación (si fuera independiente), o desenchufar el cable del receptáculo de la pared.

Protección del cables de alimentación • Los cables de alimentación eléctrica se deben instalar en lugares donde

no sean pisados ni apretados por objetos que se puedan apoyar sobre ellos.

Reparaciones/mantenimiento • Solicitar siempre los servicios técnicos de personal califi cado. En el interior no

hay partes a las que el usuario deba acceder. Para evitar riesgo de electrocución, no intentar personalmente
la reparación/mantenimiento de este equipo, ya que al abrir o extraer las tapas puede quedar expuesto a
voltajes peligrosos u otros riesgos.

Ranuras y aberturas • Si el equipo posee ranuras o orifi cios en su caja/alojamiento, es para evitar el

sobrecalientamiento de componentes internos sensibles. Estas aberturas nunca se deben obstruir con otros
objetos.

Batería de litio • Existe riesgo de explosión si esta batería se coloca en la posición incorrecta. Cambiar esta

batería únicamente con el mismo tipo (o su equivalente) recomendado por el fabricante. Desachar las
baterías usadas siguiendo las instrucciones del fabricante.

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FCC Class A Notice

N

N

This equipment has been tested and found to comply with the limits for a Class A digital

device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses and can radiate radio frequency energy and,
if not installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential area is
likely to cause harmful interference, in which case the user will be required to correct the
interference at his own expense.

This unit was tested with shielded cables on the peripheral devices. Shielded cables must be

used with the unit to ensure compliance.

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) this device may not cause harmful interference, and (2) this device must accept
any interference received, including interference that may cause undesired operation.

Quick Start — MAV Series AV Matrix Switchers

N

T

1

5

6

9

ta

d

R

Installation

Step 1 — Mount

If desired, mount the switcher in a rack with the
supplied rack ears or mount the switcher under a
desk using an Extron MBU 149 1U Enclosure
Under-desk mount kit, part #70-222-01.

Step 2 — Inputs

As applicable to your switcher, connect:

a Up to 4 or 8 S-video inputs to the

input connectors.

— or —

Up to 4 or 8 composite video inputs
to the input connectors.

Step 6 — Connect power

Definitions

Tie — An input-to-output connection
Set of ties — An input tied to two or more outputs
Configuration — One or more ties or sets of ties
Current configuration — The currently active

configuration (also called configuration 0)

Preset — A configuration that has been stored. One

preset can be assigned to each input and output

button. 16 presets are available via RS-232
control. When a preset is retrieved from memory,
it becomes the current configuration.

b Up to 4 or 8 unbalanced stereo audio

inputs to the input RCA connectors.

— or —

Up to 4 or 8 balanced or
unbalanced stereo audio inputs to

1

LR

the input captive screw connectors.

Step 3 — Outputs

As applicable to your switcher, connect:

a Up to 4 or 8 S-video or composite

video devices to the output connectors.

b Up to 4 or 8 unbalanced stereo audio

devices to the output RCA connectors.

— or —

Up to 4 or 8 balanced or unbalanced
stereo audio devices to the output

1

LR

captive screw connectors.

CAUTIO

Connect the sleeve to ground. Connecting
the sleeve to a negative (-) terminal will
damage the audio output circuits.

Tip

See caution

Sleeve

Tip

See caution

Unbalanced Output

Sleeve (s)

Tip

Ring

Tip

Ring

Balanced Output

Step 4 — RS-232 Connections

If desired, connect a control system or a computer
to the RS-232 port. See the table below

Step 5 — External Sync

If desired, feed a black burst

(genlock) signal to
the external sync
connectors.

IN

OU

Pin RS-232 Function

1 — N/C
2 TX Transmit da
3 RX Receive data
4 — N/C
5 Gnd Signal groun
6 — N/C
7—
8—
9

—

N/C
N/C
Hardwired I

Front Panel Features

Power/data/audio LED — Indicates power is applied.

This LED also has two secondary functions:
Serial communication function — The Power/

data/audio LED blinks off and on to indicate
that an IR signal has been received.

Audio level function — In Audio Setup mode,
the Power/data/audio LED lights when the
selected input audio signal is at or above the
reference level and is unlit when the signal is
below the reference level. Adjust the gain until
the LED blinks frequently. If the LED is almost
always lit, blinking off only occasionally, the
level is too high. If the LED is almost always
off, blinking on (lit) only occasionally, the level
is too low.

I/O button (audio/video switchers) selects video

and audio, video, or audio for input selection.

Video and Audio LEDs (audio/video switchers)

indicate whether video and audio, video, or
audio is selected. The Audio LED blinks to
indicate audio is broken away.

Input buttons select an input to tie to an output.
Input LEDs identify the input selected for the tie.
Output buttons select output(s) to tie to an input.
Output LEDs identify output(s) selected for the tie.
Enter button saves configuration changes.
Preset button selects Save Preset mode or Recall

Preset mode, in which a configuration can be
saved as a preset or recalled.

Audio Setup button and LED enable you to view

and/or change the current audio level setting
for each input. Audio Setup is a secondary input

function of the I/O button.

QS-1MAV 44 / 48 / 84 / 88 Matrix Switchers • Quick Start

Quick Start — MAV Series AV Matrix Switchers, cont’d

e

.

n.

A

s.
n.

PRESET PRESET

PRESET PRESET

Save

Recall

Press and hold.

2 seconds

Preset LED blinks.

Release the Preset button.

Press and release.

Preset LED lights.

PRESET

P
t

= lit, = unlit

y.

P

s.

Down ( ) and Up ( ) buttons and LEDs decrease

or increase the audio level for the selected input
and indicate the decrease and increase. On

8-output switchers,

and are secondary

functions of the Output 7 and Output 8 buttons.

+dB/–dB LEDs indicate the polarity of the audio

level setting (+dB = gain, –dB = attenuation).

+dB and –dB are secondary functions of the Video
and Audio LEDs.

Each audio input gain and attenuation indicator

indicates a range of 6 dB when lit. (Output 1
LED off = 0 dB to 5 dB, Output 1 lit = 6 dB to 11
dB, Output 1 and 2 lit = 12 dB to 17 dB, Output
1 through 3 lit = 18 dB.) The level indicators are

secondary functions of the Output 1 through
Output 3 LEDs.

Operation

Powering on

Plug in the switcher to apply power. The
switcher’s self-test sequences the front panel LEDs.

Creating a tie

1. Press and release the I/O

button to select or deselect
video and/or audio as
desired.

2. Press and release

The LEDs light when video

and/or audio is selected.

Press and release the Input 5 butto

the desired input
button*.

3. Press and release the

desired output
button(s)*.

Press the button to cycl

through the selections

I/O

VID

AUD

INPUTS

4

The Input 5 LED lights to
indicate that input 5 is selected.

5

6

Saving or recalling a preset

1. To Save a preset:
Press and hold the
Preset button until
the Preset LED
starts blinking.

To recall a preset:
Press and release
the Preset button.

2. Press the desired
input or output button.

ress and release the input 1 button

o select preset 1 to save or recall.

INPUTS

1

2 4

Preset 2 Preset 3 Preset 4

3

The Preset LED
and Input 1 LED
light for 1 second
then go out.

The selected input button and Preset button
remain lit for 1 second to indicate the preset and
then go out.

Viewing and adjusting the audio input gain

1. Apply audio signals to all inputs to be adjusted.

2. Press and hold the

Press and hold the button.

Audio Setup (I/O)
button for 2
seconds until the
Audio LED lights.

UDIO SETUP AUDIO SETUP

2 seconds

The LED light

Release the butto

3. Press an input button. See chapter 3 to read the
displayed value.

ress and release the Output 3, 4, and 8 button

OUTPUTS

3 8

The LEDs blink to indicate that the selected
input will be tied to these outputs.

= Blinking button

4

5

*You can cancel the entire set of ties at this

point by waiting for the 5-second input/
output button timeout to occur .

4. Press and release the Enter button. The selected

input’s and the selected outputs’ LEDs light
steadily for approximately 1 second to indicate
the tie and then go out.

MAV 44 / 48 / 84 / 88 Matrix Switchers • Quick StartQS-2

Press and release an input button.

5

The input
LED lights.

OUTPUTS

1

2

The Output 1 through 3
LEDs display the input's
audio level range.

3

+dB

+/–dB LEDs

-dB

show polarit

Power blinks to
show the
signal level.

4. Increase and decrease the audio input gain by
pressing the

and buttons until the audio

level indicator (Power LED) blinks frequently.

5. For other inputs, repeat steps 3 and 4.

6. Press and release the Audio Setup button to exit.

Table of Contents

Chapter 1 • Introduction ....................................................................................................... 1-1

About the Switchers ......................................................................................................... 1-2

Features ................................................................................................................................... 1-3

Video features .................................................................................................................... 1-3

Audio features ................................................................................................................... 1-4

Common features .............................................................................................................. 1-4

Chapter 2 • Installation .......................................................................................................... 2-1

Mounting the Switcher .................................................................................................... 2-2

Tabletop use .......................................................................................................................2-2

Rack mounting the switcher ............................................................................................. 2-2

UL requirements .................................................................................................................. 2-2

Mounting instructions ........................................................................................................ 2-2

Furniture mounting the switcher ..................................................................................... 2-3

Cabling and Rear Panel Views...................................................................................... 2-4

Video input and output connections................................................................................ 2-4

Audio input and output connections (audio/video models) ........................................... 2-5

Remote connection ............................................................................................................ 2-6

External sync connection ...................................................................................................2-7

Power connection .............................................................................................................. 2-8

Chapter 3 • Operation ............................................................................................................. 3-1

Front Panel Controls and Indicators ......................................................................... 3-2

Definitions .......................................................................................................................... 3-3

Power/data/audio LED and infrared sensor ...................................................................... 3-3

Input and output selection controls and indicators ........................................................3-4

Control buttons and LEDs .................................................................................................3-4

I/O selection and audio/video controls and indicators (audio/video switchers) ............. 3-5

Operations .............................................................................................................................. 3-6

Powering up the switcher ................................................................................................. 3-6

Creating a set of ties .......................................................................................................... 3-7

Example 1: Create a set of video and audio ties ...........................................................3-8

Example 2: Add a video tie to a set of video and audio ties ......................................... 3-9

Example 3: Remove a tie from a set of ties ................................................................. 3-11

Viewing the configuration ..............................................................................................3-12

Example 4: View ties by selecting an input ................................................................. 3-13

Example 5: View ties by selecting outputs .................................................................. 3-14

Using presets .................................................................................................................... 3-16

Example 6: Save a preset ............................................................................................ 3-17

Example 7: Recall a preset .......................................................................................... 3-18

Adjusting input audio gain and attenuation ................................................................. 3-19

Example 8: Adjust the input audio gain ..................................................................... 3-21

Resetting audio gain — single input ......................................................................... 3-23

Resetting audio gain — all inputs .............................................................................. 3-24

Setting the output audio level ................................................................................... 3-24

MAV 44 / 48 / 84 / 88 Matrix Switchers • Table of Contents

i

Table of Contents, cont’d

Front panel security lockout (Executive mode) .............................................................. 3-25

Clearing all ties and presets ............................................................................................ 3-25

Resetting the system to factory defaults (audio/video switchers) ................................3-26

Memory ............................................................................................................................ 3-26

Optimizing the Audio (Audio/Video Switchers) ................................................ 3-27

Troubleshooting ................................................................................................................ 3-27

Worksheets .......................................................................................................................... 3-28

Worksheet example 1: System equipment ..................................................................... 3-28

Worksheet example 2: Daily configuration .................................................................... 3-29

Worksheet example 3: Test configuration...................................................................... 3-30

Configuration worksheet ................................................................................................ 3-31

Chapter 4 • Remote Operation.......................................................................................... 4-1

Simple Instruction Set Control .................................................................................... 4-2

Host-to-switcher instructions ............................................................................................ 4-2

Switcher-initiated messages .............................................................................................. 4-3

Switcher error responses ................................................................................................... 4-4

Using the command/response table .................................................................................4-4

Symbol definitions ........................................................................................................ 4-4

Command/response table for SIS commands ................................................................ 4-5

Loading firmware using an SIS command ...................................................................... 4-10

Matrix Switchers Control Program .......................................................................... 4-12

Installing the software .................................................................................................... 4-12

Using the software ..........................................................................................................4-13

Overview .................................................................................................................... 4-13

Updating the firmware............................................................................................... 4-15

Windows buttons, drop boxes, and the trash can ...................................................... 4-18

Windows menus ......................................................................................................... 4-19

File menu .......................................................................................................... 4-19

Tools menu ........................................................................................................ 4-19

Audio-input Configuration selection ................................................................ 4-20

Preferences menu .............................................................................................4-20

Master-Reset selection ...................................................................................... 4-21

Using Emulation mode .................................................................................................... 4-22

Using the help system ...................................................................................................... 4-22

ii MAV 44 / 48 / 84 / 88 Matrix Switchers • Table of Contents

Appendix A • Specifications and Part Numbers ................................................... A-1

Specifications....................................................................................................................... A-2

Part Numbers ....................................................................................................................... A-6

MAV Series AV switchers .................................................................................................. A-6

Included parts ................................................................................................................... A-6

Replacement parts ............................................................................................................ A-6

Optional accessories ......................................................................................................... A-7

Cables ................................................................................................................................ A-7

Bulk cable .................................................................................................................... A-7

Assorted connectors .................................................................................................... A-8

Pre-cut cables .............................................................................................................. A-8

MAV 44 / 48 / 84 / 88 Matrix Switchers • Table of Contents

iii

Table of Contents, cont’d

All trademarks mentioned in this manual are the properties of their respective owners.

iv MAV 44 / 48 / 84 / 88 Matrix Switchers • Table of Contents

68-777-01 Rev. D

10 07

MAV 44 / 48 / 84 / 88 Matrix Switchers

Chapter One

1

Introduction

About the Switchers

Features

Introduction, cont’d

or

Introduction

About the Switchers

The Extron MAV Series AV matrix switchers (figure 1-1) are a family of broadcast
quality matrix switchers that distribute any composite video or S-video input with
audio to any combination of outputs. The MAV Series switchers can route multiple
input/output ties simultaneously. The MAV Series switchers have a wide array of
input and output configurations, video formats, and audio connections.
Depending on the model, the switchers route a combination of S-video or
composite video with audio on captive screw or RCA connectors.

The MAV 88 matrix size has models without audio.

Monitor

LCD

Sound System

Projector

Monitor

CRT

Projector

Extron
MAV 88 AV

Matrix Switcher

R

7

L

R

8

R

L

5

L

R

6

R

L

3

L

R

4

R

L

1

L

R

INPUTS

SYNC

2

L

IN

OUT
7
8

OUTPUTS

5

6
3
4

1

2
7
8

INPUTS

5

6
3
4

1

100-240V 0.3A

2

50-60Hz

R

1

L

R

2

L

R

5

L

R

6

R

L

3

L

R

4

L

OUTPUTS

RS 232

MAV 88 AV

R

7

L

R

8

L

CD Player

DISTRIBUTION AMPLIFIER

Extron

System Control

Amplifier

Speakers

BBG 6 A

DVD

VCR

Video Camera

Laserdisc Player

Blackburst Video Generat

Figure 1-1 — Typical MAV 88 AV application

The table on the following page lists the models and the combinations of inputs
and outputs available in the MAV Series switcher family.

The MAV switcher can be locally controlled on the front panel or remotely
controlled via its rear panel RS-232 serial port or an optional IR 501 Small Matrix
Infrared (IR) Remote Control (part # 70-336-01).

MAV 44 / 48 / 84 / 88 Matrix Switchers • Introduction1-2

ledoM#traP

AVS44VAM22-355-06

ACRAVS44VAM23-355-06

VA44VAM12-355-064

ACRVA44VAM13-355-064

AVS84VAM22-506-06

ACRAVS84VAM23-506-06

VA84VAM12-506-064

ACRVA84VAM13-506-064

AVS48VAM22-455-06

ACRAVS48VAM23-455-06

VA48VAM12-455-068

ACRVA48VAM13-455-068

VS88VAM20-555-06

AVS88VAM22-555-06

ACRAVS88VAM23-555-06

V88VAM10-555-068

VA88VAM12-555-068

ACRVA88VAM13-555-068

oediVoediv-S

oN
oN

oN
oN

oN
oN

oN
oN
oN

stupnIstuptuO

evitpaC

wercs

oidua

44
4

oN
oN oN

44
4

oN
oN oN

88
8

oN
oN oN

8
88
8

oN oN oN
oN
oN oN

oN

4

oN

4

oN

8

oN oN oN

oN

8

ACR

oidua

oN oN

4

oN

44

oN oN

4

oN

48

oN oN

8

oN

84

oN oN

8

oN

88

oediVoediv-S

oN

4

oN

8

oN

4

oN

8
8

evitpaC

wercs

oidua

44
4

oN
oN oN

88
8

oN
oN oN

44
4

oN
oN oN

8
88
8

oN oN oN
oN
oN oN

oN

4

oN

8

oN

4

oN oN

oN

8

ACR

oidua

oN

4

oN

4

oN

8

oN

8

oN

4

oN

4

oN

8

oN

8

Features

Video features

S-video (SV) models — These switchers input and output NTSC 3.58, NTSC 4.43,

PAL, or SECAM S-video (luminance [Y] and chrominance [C]) signals on
4-pin female mini DIN connectors.

Composite video (V) models — These switchers input and output NTSC 3.58,

NTSC 4.43, PAL, and SECAM composite video signals on female BNC
connectors.

Bandwidth (SV and V models) — Bandwidth is 150 MHz (-3 dB). This high

bandwidth allows the switchers to switch all of the quad-standard video
formats with no loss of signal quality.

Vertical interval switching — The switcher can use a black burst (genlock) signal to

synchronize switching during the vertical interval. This ensures glitch-free
switching among multiple timed sources.

1-3MAV 44 / 48 / 84 / 88 Matrix Switchers • Introduction

Introduction, cont’d

Audio features

Captive screw audio connector (A) models — These switchers input and output

balanced or unbalanced stereo audio signals, on 3.5 mm, 5-pole captive screw
terminals.

RCA audio connector (A RCA) models — These switchers input and output

unbalanced stereo audio signals on left and right RCA connectors.

Audio input gain/attenuation — You can set the level of audio gain or attenuation

(+10 dB to –18 dB) via the RS-232 port or from the front panel. Individual
input audio levels can be adjusted so there are no noticeable volume
differences between sources and for the best headroom and signal-to-noise
ratio. This function also eliminates the need for separate preamps or
attenuators when used with professional (higher line level) and consumer
(lower line level) audio equipment.

Audio output level switch — The audio level of each output can be set to either

–10 dBV (consumer level) or +4 dBu (pro level) via RS-232 control only.

Audio follow — In audio/video switchers, audio can be switched with the

corresponding video input. Audio follow switching can be done via front
panel control, optional IR 501 control, or the RS-232 port.

Audio breakaway — In audio/video switchers, audio can be broken away from its

corresponding video input signal. Audio breakaway switching can be done
via front panel control, optional IR 501 control, or the RS-232 port.

Common features

Switching flexibility — Provides individually buffered, independent matrix

switched outputs with audio follow and audio breakaway for audio versions.

• Any input to any or all outputs

• Quick multiple tie — Multiple inputs can be switched to multiple outputs

simultaneously. This allows all displays (outputs) to change from source to
source at the same time.

Operational flexibility — Operations such as input/output selection and setting of

presets can be performed on the front panel, via the RS-232 port, or using the
optional IR 501 small matrix universal remote control. The RS-232 port
allows remote control via a PC or control system.

• Front panel controller — The MAV series front panel controller feature

supports touch-of-a-button input and output selection, preset creation and
selection, and audio gain and attenuation control.

• RS-232 control — The switcher’s RS-232 port allows remote control via a PC

or control system using Extron’s Simple Instruction Set (SIS
Windows®-based control program.

• Optional IR remote control — The MAV switchers are remote controllable,

using the optional small matrix IR remote control.

The switcher’s IR receiver is disabled by default and must be enabled to use
the IR remote control. See the IR receiver enable SIS command in chapter 4,
“Remote Operation” to enable the IR receiver.

™

) or the included

Upgradeable firmware — The firmware that controls the switcher’s operation can

be upgraded in the field via the RS-232 port, without taking the switcher out
of service. Firmware upgrades are available for download on the Extron Web
site, www.extron.com, and they can be installed using the Windows-based
control program.

MAV 44 / 48 / 84 / 88 Matrix Switchers • Introduction1-4

Global memory presets — 16 global memory presets are a time-saving feature that

lets you set up and store input/output configurations in advance. You can
then recall those configurations, when needed, with a few simple steps. On
each model, there are as many presets available from the front panel as there
are input and output buttons:

• MAV 44s have 8 presets available on the front panel.

• MAV 48s and MAV 84s have 12 presets available on the front panel.

• MAV 88s have 16 presets available on the front panel.
On smaller MAVs, presets that are not available from the front panel are still

available under RS-232 or optional IR 501 control.

Rack mountable — With the included rack mounting kit, the switchers can be

mounted in any conventional 19” wide rack.

Under-desk mountable — With an optional desk mounting kit, the switchers can

be mounted under a desk, podium, or other furniture.

Front panel security lockout (executive mode) — If a MAV Series switcher is

installed in an open area where operation by unauthorized personnel may be
a problem, a security lock-out feature can be implemented. When the front
panel is locked, a special button combination is required to unlock the front
panel controller before it can be operated. Ties can still be viewed.

When the front panel is locked out, the switcher can still be operated via the
RS-232 link.

Power supply — The matrix switchers’ internal 100 VAC to 240 VAC, 50/60 Hz,

15 watts, auto-switchable power supply provides worldwide power
compatibility.

1-5MAV 44 / 48 / 84 / 88 Matrix Switchers • Introduction

Introduction, cont’d

MAV 44 / 48 / 84 / 88 Matrix Switchers • Introduction1-6

MAV 44 / 48 / 84 / 88 Matrix Switchers

Chapter Two

2

Installation

Mounting the Switcher

Cabling and Rear Panel Views

Installation, cont’d

Installation

Mounting the Switcher

Tabletop use

For tabletop use, affix a self-adhesive rubber foot to each corner of the bottom of
the switcher.

Rack mounting the switcher

UL requirements

The following Underwriters Laboratories (UL) requirements pertain to the
installation of the matrix switcher into a rack (figure 2-1).

1. Elevated operating ambient temperature — If installed in a closed or multi-

unit rack assembly, the operating ambient temperature of the rack
environment may be greater than room ambient. Therefore, consider
installing the equipment in an environment compatible with the maximum
ambient temperature (Tma) specified by the manufacturer.

2. Reduced air flow — Installation of the equipment in a rack should be such

that the amount of air flow required for safe operation of the equipment is not
compromised.

3.

Mechanical loading — Mounting of the equipment in the rack should be such

that a hazardous condition is not achieved due to uneven mechanical loading.

4. Circuit overloading — Consideration should be given to the connection of

the equipment to the supply circuit and the effect that overloading of the
circuits might have on overcurrent protection and supply wiring.
Appropriate consideration of equipment nameplate ratings should be used
when addressing this concern.

5. Reliable earthing (grounding) — Reliable earthing of rack-mounted

equipment should be maintained. Particular attention should be given to
supply connections other than direct connections to the branch circuit (e.g.
use of power strips).

Keep the switcher out of bright light to prevent interference with the IR
signals from the IR 501 remote control.

Mounting instructions

All of the MAV Series AV switcher models are housed in rack-mountable, 1U-high,
full-rack wide metal enclosures. The appropriate rack mounting kit is included
with each switcher. Rack mount the switcher as follows:

1. If feet were previously installed on the bottom of the switcher, remove them.

2. Attach the rack mount brackets to the switcher with the eight #8 machine

screws provided (figure 2-1).

3. Insert the switcher into the rack, aligning the holes in the mounting bracket

with those of the rack.

4. Secure the switcher to the rack using the supplied machine screws.

MAV 44 / 48 / 84 / 88 Matrix Switchers • Installation2-2

#
E

Mounting Screws (2 Plcs)

.,

p.

Rack-mount

Bracket

(Included)

or

100-240V 0.3A

8 Screw (4 Plcs)

ach Side

Table/
Wall-mount
Bracket (Optional)

Figure 2-1 — Mounting the switcher

Furniture mounting the switcher

The MAV Series switcher models can be mounted under a table or other horizontal
surface with an optional Extron under-desk mounting kit (part #70-222-01).

Each Side

Drill pilot holes
3/32” (2 mm) dia
1/4” (6 mm) dee

RS 232

MAV 88 AV

R

7

L

R

8

R

L

5

L

R

6

R

L

3

L

R

4

R

L

1

L

R

OUTPUTS

2

L

R

7

L

R

8

R

L

5

L

R

6

R

L

3

L

R

4

R

L

1

L

R

INPUTS

SYNC

2

L

IN

OUT
7
8

OUTPUTS

5

6
3
4

1

2
7
8

INPUTS

5

6
3
4

1
2

50-60Hz

1. Secure the two table/wall mounting brackets to the switcher with the eight

machine screws provided in the kit (figure 2-1).

2. Hold the switcher with attached brackets against the underside of the desk or

other furniture. Mark the location of holes for screws on the underside of the
desk.

3. Drill 1/4" (6.4 mm) deep, 3/32" (2 mm) diameter pilot holes in the table or

desk at the marked screw locations from the underside/inside (concealed
side) of the furniture, where the switcher will be located.

4. Insert the four wood screws into the pilot holes. Fasten each screw into the

installation surface until just less than 1/4" of the screw head protrudes.

5. Align the installed screws with the slots in the mounting brackets, and place

the switcher against the surface, with the screws through the bracket slots.

6. Slide the switcher slightly forward or back, then tighten all four screws to

secure it in place.

2-3MAV 44 / 48 / 84 / 88 Matrix Switchers • Installation

Installation, cont’d

Cabling and Rear Panel Views

All connectors are on the rear panel. The switcher can be connected to up to eight
S-video, composite video, and/or stereo audio sources, depending on the model.
The switcher can output to up to eight S-video, composite video, and/or audio
devices.

Figure 2-2 shows a MAV 44 AV composite video and audio switcher. Figure 2-3
shows a MAV 88 SVA RCA S-video and audio switcher . All of the switchers are
housed in the same 1U enclosures, but have more or fewer input connectors to
accommodate the different configurations they provide. The two switchers shown
have all of the connector types that are available in the MAV AV product family
covered in this manual.

Some devices, such as VCRs, can be connected to both video and audio input and
output connectors of the switcher. Others, such as tape players or CD players, can
be connected only to the audio input connectors. An audio device and a separate
video device can share an input, because the switcher is capable of switching video
and audio separately (audio breakaway).

100-240V 0.3A

INPUTS

1
2

50-60Hz

OUTPUTS

3
4

1

3

2

4

SYNC

1

1

3

R

R

L

IN
OUT

L

R

R

2

4

L

L

INPUTS

3

R

R

L

L

R

R

2

4

L

L

OUTPUTS

MAV 44 AV

RS-232

1 5 73

12 91110

Figure 2-2 — MAV 44 AV composite video switcher with audio

10

100-240V 0.3A

50-60Hz

12 11

INPUTS

1

5

3

6

2

4

2 6 84

OUTPUTS

1

7

8

5

3

6

2

4

SYNC

1

L

7

IN

8

OUT

R

Figure 2-3 — MAV 88 SVA RCA S-video switcher with audio on RCA
connectors

Video input and output connections

Composite video inputs (composite video [V] switchers only) — For each

1

input, connect a composite video source to one of these BNC connectors.
S-video inputs (S-video [SV] switchers only) — For each input, connect an

2

S-video source to one of these 4-pin mini DIN connectors.

Composite video outputs (composite video [V] switcher models only) —

3

Connect a composite video display or other device to these BNC connectors
for each composite video output.

5

3

2

4

INPUTS

8

6

7

3

2

1

4

OUTPUTS

MAV 88 SVA RCA

5

6

8

7

RS-232

9

S-video output (S-video [SV] switchers only) — Connect an S-video display

4

or other device to this 4-pin mini DIN connector for each S-video output.

MAV 44 / 48 / 84 / 88 Matrix Switchers • Installation2-4

Audio input and output connections (audio/video models)

The audio level for each input can be individually set, via the front panel or RS-232,
to ensure that the level on the output does not vary from input to input. See
chapter 3, “Operation”, and chapter 4, “Remote Operation” for details.

By default, the audio follows the video switch. Audio breakaway, which is
commanded via the front panel, under RS-232 control via the SIS or Windows­based control program, or optional IR 501 control, allows you to select from any
one of the audio input sources. For details, see chapter 3, “Operation”, and
chapter 4, “Remote Operation”, and refer to the IR 501 Small Matrix IR Remote
Control User’s Guide.

Balanced or unbalanced audio input connections (captive screw audio

5

connector [A] models only) — Each input has a 3.5 mm, 5-pole captive screw
connector for balanced or unbalanced stereo audio input. Connectors are
included with each MAV AV captive screw connector switcher, but you must
supply the audio cable. See figure 2-4 to wire a connector for the appropriate
input type and impedance level. High impedance is generally over 5 k ohms.

Figure 2-4 shows two methods of wiring the captive screw audio connectors for
input and figure 2-6 shows two methods of wiring the connectors for output.
A mono audio connector consists of the tip and sleeve. A stereo audio
connector consists of the tip, ring, and sleeve. If you are wiring a captive
screw connector from an existing unbalanced audio cable, the white insulated
wire is typically the left channel (tip) and the red insulated wire is typically the
right channel (sleeve). There is no reliable standard for existing balanced
audio cables.

Tip

Ring

Sleeve (s)

Tip

Ring

Balanced Stereo Input

(high impedance)

3/16” (5 mm) Max.

Do not tin the wires!

Tip

Sleeve

Tip

Sleeve

Unbalanced Stereo Input

(high impedance)

LR

Figure 2-4 — Captive screw connector wiring for audio inputs

The length of exposed wires is critical. The ideal length is 3/16” (5 mm).

• If the stripped section of wire is longer than 3/16”, the exposed wires may
touch, causing a short cir

cuit between them.

• If the stripped section of wire is shorter than 3/16”, wires can be easily
pulled out even if tightly fastened by the captive screws.

RCA connector audio inputs (RCA audio connector [A RCA] models only) —

6

Each input has a pair (left and right) of RCA connectors for unbalanced stereo
audio input (figure 2-5).

Tip (Signal)

Right Channel
(Red Jacket)

Sleeve (Gnd )

Left Channel
(White Jacket)

Tip (+)

Sleeve ( )

LR

Figure 2-5 — RCA connector wiring

2-5MAV 44 / 48 / 84 / 88 Matrix Switchers • Installation

Installation, cont’d

t

Balanced or unbalanced audio output connectors (captive screw audio

7

connector [A] models only) — These 3.5 mm, 5-pole captive screw connectors
output the selected unamplified, line level audio. Connect audio devices,
such as an audio amplifier or powered speakers to these connectors. See
figure 2-6 to properly wire an output connector.

3/16” (5 mm) Max.

Do not tin the wires!

Figure 2-6 — Captive screw connector wiring for audio output

CAUTION

The length of exposed wires is critical. The ideal length is 3/16” (5 mm).

• If the stripped section of wire is longer than 3/16”, the exposed wires may
touch, causing a short cir

• If the stripped section of wire is shorter than 3/16”, wires can be easily
pulled out even if tightly fastened by the captive screws.

RCA connector audio output (RCA connector audio [A RCA] models only) —

8

The switcher has a pair (left and right) of RCA connectors for each unbalanced
stereo audio output (figure 2-5).

Remote connection

RS-232 connector — Connect a host device, such as a computer or control

9

system, to the switcher via this 9-pin D connector (figure 2-7) for remote
control of the switcher.

Tip

NO GROUND HERE.

Sleeve(s) Ground

Tip

NO GROUND HERE.

LR

Left

Right

Unbalanced Stereo Output

Tip

Ring

Tip

Ring

Balanced Stereo Output

LR

Left

Right

Connect the sleeve to ground (Gnd). Connecting the sleeve to a negative
(-) terminal will damage the audio output circuits.

cuit between them.

Pin RS-232 Function

1 — Not used

51

96

Female

2 TX Transmit data
3 RX Receive data
4 — Not used
5 Gnd Signal ground
6 — Not used
7—
8—
9

Not used
Not used
Hardwired IR inpu

—

Figure 2-7 — RS-232 port pin assignment

The cable used to connect the RS-232 port to a computer or control system
may need to be modified by removing pins or cutting wires. If you encounter
problems while operating under RS-232 control (the switcher may hang up),
pins 1, 4, 6, 7, 8, and 9 may need to be disconnected. Either cut the wire to
pins 1, 4, and 6 through 9 in a hard-shelled connector or remove pins 1, 4, and
6 through 9 from a molded plug.

See chapter 4, “Remote Operation”, for definitions of the SIS commands and
details on how to install and use the control software.

MAV 44 / 48 / 84 / 88 Matrix Switchers • Installation2-6

Using the hardwired IR input on pin 9, you can use a control system with

0

1

r/

IR-learning capabilities to operate the switcher just as if you were using an IR
501 remote control. The control system must first “learn” the IR command
from an IR 501, after which it sends the same commands to the MAV via
pin 9.

External sync connection

The MAV switcher switches between inputs during the vertical interval period,
resulting in glitch-free video switching. The MAV switcher can use an external
signal to synchronize switching during the vertical interval. Without the external
sync locking feature, switching between inputs can result in a brief rolling (sync
loss) or a brief change in the picture size.

Sync In connector — Connect an external genlock signal to this BNC

1

connector for genlocking the video signal in broadcast or other sync-critical
applications.

Sync Out connector — Connect any downstream equipment that requires

1

genlocking to this BNC connector to route the external sync signal throughout
the system in broadcast or other sync-critical applications.

Figure 2-8 shows a basic external sync configuration.

Extron
BBG 6 A

5

Black Burst/Color Ba
Audio Generator

6

1

R

L

R

2

L

100-240V 0.3A

50-60Hz

BBG 6 A

BLACKBURST AND AUDIO
GENERATOR

POWER

1 KHZ

12V

AUDIO

.2A MAX

LR

ON

INPUTS

1
2

5

3
4

7

6

8

OUTPUTS

1
2

5

3

6

4

BLACKBURST

3

1

BLACKBURST

+4

NTSC

1 2 3

COLORBARS

-10

PAL

7
8

SYNC

2

OUT

4

IN

Extron
MAV 88 AV

Matrix Switcher

To next device
or terminate.

IN

Figure 2-8 — Simple external sync connection example

2-7MAV 44 / 48 / 84 / 88 Matrix Switchers • Installation

Installation, cont’d

E
B

B
A

2

Figure 2-9 shows another configuration, in which the timing source passes through
three video cameras and a video scan converter before connecting to the switcher.
This type of video camera is capable of synchronizing with the external timing
source for video editing applications.

Monitor

Extron

VGA Input

VSC 900D

Computer-to-Video

1
L

SYNC

2
L

IN

OUT
7
8

OUTPUTS

5

6
3
4

1

2
7
8

5
6

Scan Converter

RS 232

MAV 88 AV

R
7

L

R
8

R

L

5

L

R
6

R

L

3

L

R

4

R

L

1

L

R

OUTPUTS

2

L

R
7
L

R
8

R

L

5

L

R

6

R

L
3
L

R

4

R

L

R

INPUTS

IN

RS-232

/422
G
E

OUT
N
L
O

D1

C
K

VIDEO

S-VIDEO

V

H/H-Y

B/B-Y

O
U

R/R-Y G/Y

T
P

V

U
T
S

H
/HV

V

B

2

/B-Y

H

/HV
G
/Y

B

/B-Y
R
/R-Y

G-Y

R

1

/R-Y

RGB/R-Y, B-Y, Y

I
N
P
U

100-240V 0.3A

T

RGB

S

50/60 Hz

xtron

BG 6 A

lack Burst/Color Bar/
udio Generator

DISTRIBUTION AMPLIFIER

Extron
MAV 88 AV

VCR

100-240V 0.3A

50-60Hz

INPUTS

3
4

1

2

Matrix Switcher

Video Camera VTR VTR

Figure 2-9 — Multiple device external sync connection example

If no external sync timing source is connected to the switcher, switching occurs
immediately after a front panel or RS-232 switch command is received.

Power connection

AC power connector — Plug a standard IEC power cord into this connector

1

to connect the switcher to a 100 VAC to 240 VAC, 50 or 60 Hz power source.

MAV 44 / 48 / 84 / 88 Matrix Switchers • Installation2-8

MAV 44 / 48 / 84 / 88 Matrix Switchers

Chapter Three

3

Operation

Front Panel Controls and Indicators

Operations

Optimizing the Audio (Audio/Video Switchers)

Troubleshooting

Worksheets

Operation, cont’d

Operation

Front Panel Controls and Indicators

The number of input and output buttons and LEDs and other controls and LEDs
that are present on each MAV Series AV matrix switcher vary with the number of
inputs and outputs and whether the switcher has video only or both video and
audio. Not every switcher has every control or indicator described in this chapter.

In the following descriptions, you will find the following terms:

• Video-only switcher — Switches S-video or composite video only and has no

audio capabilities.

• Audio/video switcher — Switches either S-video or composite video and

audio.

Figure 3-1 shows the front panel of an 8-input, 8-output video-only switcher.
Figure 3-2 shows the front panel of a 4-input, 8-output video and audio switcher.
These examples show all of the control and indicator combinations that you may
encounter with your particular switcher.

Many of the buttons and LEDs on figure 3-2 have dual functions.

1

1

IR

24

INPUTS

3

5

MAV SERIES

7

6

8

2

1

OUTPUTS

4

3

6

5

7

ENTER

8

PRESET

AV MATRIX SWITCHER

2

3

Figure 3-1 — MAV 88 V front panel

INPUTS

2 4

1

IR

3

3

2

1

3

Figure 3-2 — MAV 48 SVA RCA front panel

OUTPUTS

4

4

101 11 8

6

5

8

7

4

ENTER

PRESET

65

9

MAV SERIES

AV MATRIX SWITCHER

I/O

VID

+dB

-dB

AUD

AUDIO SETUP

65

72

MAV 44 / 48 / 84 / 88 Matrix Switchers • Operation3-2

Definitions

The following terms, which apply to Extron matrix switchers, are used throughout
this manual:

Tie — An input-to-output connection
Set of ties — An input tied to two or more outputs. (An output can never be tied

Configuration — Consists of one or more ties or one or more sets of ties
Current configuration — The configuration that is currently active in the

Global memory preset — A configuration that has been stored. Up to 16 global

to more than one input.)

switcher (also called configuration 0)

memory presets can be stored in memory. The input and output buttons are
used to select the desired preset memory location to load or retrieve a preset.
When a preset is retrieved from memory, it becomes the current
configuration. On each model, there are as many presets available from the
front panel as there are input and output buttons:

• MAV 44 models have 8 presets available on the front panel.

• MAV 48 and MAV 84 models have 12 presets available on the front
panel.

• MAV 88 models have 16 presets available on the front panel.

On smaller MAV models, presets that are not available from the front panel
are still available under RS-232 or optional IR 501 control.

Power/audio/data LED and infrared sensor

Infrared remote sensor — This sensor receives infrared (IR) signals from the

1

optional IR 501 small matrix universal remote control. The IR remote control
must be pointed within 30 degrees of this sensor for best results.

Operation of the IR 501 remote control is described in the IR 501 Small Matrix

IR Remote Control User’s Guide.

The switcher’s IR receiver is disabled by default and must be enabled to use
the IR remote control. See the IR receiver enable SIS command in chapter 4,
“Remote Operation” to enable the IR receiver.

Keep the switcher out of bright light to prevent interference with the IR signals
from the IR 501 remote control.

Power/data/audio LED —

2

• When lit, the Power LED indicates that power is applied to the matrix

switcher.

• When blinking off and on, the Power LED indicates that an IR signal

has been received.

• In Audio Setup mode, the Power LED also serves as an audio meter that

is tied to output 1. The LED blinks frequently when the selected input’s
audio level has been adjusted to the –10 dBV internal reference level. (In
Audio Setup mode, the selected input’s audio is automatically tied to
output 1.) See “Adjusting input audio gain and attenuation” on
page 3-19 and “Optimizing the Audio (Audio/Video Switchers)” on
page 3-27.

3-3MAV 44 / 48 / 84 / 88 Matrix Switchers • Operation