Extron electronic ASA User Manual

User’s Manual

www.extron.com

Extron Electronics, USA

1230 South Lewis Street
Anaheim, CA 92805
USA

714.491.1500
Fax [phone]

Extron Electronics, Europe

Beeldschermweg 6C
3821 AH Amersfoort
The Netherlands
+31.33.453.4040
Fax [phone]

© 2003 Extron Electronics. All rights reserved.

Extron Electronics, Asia

135 Joo Seng Road, #04-01
PM Industrial Building
Singapore 368363
+65.6383.4400
Fax [phone]

Extron Electronics, Japan

Daisan DMJ Building 6F
3-9-1 Kudan Minami
Chiyoda-ku, Tokyo 102-0074 Japan
+81.3.3511.7655
Fax [phone]

ASA Series

Audio Summing Amplifiers

68-776-01 Rev. C

Printed in the USA

12 03

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 afin 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 fixation • Ne pas utiliser de pièces de fixation 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.

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 especificamente recomendados por el fabricante, ya que podrian
implicar riesgos.

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 qualified 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 fil 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 qualifié. Aucun des éléments internes ne peut être
réparé par l’utilisateur. Afin 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 orifices • Si le boîtier de l’appareil comporte des fentes ou des orifices,

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 qualifiziertem

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 empfindlichen
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.

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

calificado. 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 orificios 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.

FCC Class A Notice

Note: 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.

Note: This unit was tested with shielded cables on the peripheral devices. Shielded
cables must be used with the unit to ensure compliance.

Extron’s Warranty

Extron Electronics warrants this product against defects in materials and
workmanship for a period of three years from the date of purchase. In the event of
malfunction during the warranty period attributable directly to faulty workmanship
and/or materials, Extron Electronics will, at its option, repair or replace said products
or components, to whatever extent it shall deem necessary to restore said product to
proper operating condition, provided that it is returned within the warranty period,
with proof of purchase and description of malfunction to:

USA, Canada, South America, Europe, Africa, and the Middle East:
and Central America:

Extron Electronics Beeldschermweg 6C
1230 South Lewis Street 3821 AH Amersfoort
Anaheim, CA 92805, USA The Netherlands

Asia: Japan:

Extron Electronics, Asia Daisan DMJ Bldg. 6F,
135 Joo Seng Road, #04-01 3-9-1 Kudan Minami
PM Industrial Bldg. Chiyoda-ku, Tokyo 102-0074
Singapore 368363 Japan

This Limited Warranty does not apply if the fault has been caused by misuse,
improper handling care, electrical or mechanical abuse, abnormal operating conditions
or non-Extron authorized modification to the product.

If it has been determined that the product is defective, please call Extron and ask for
an Applications Engineer at [phone] (USA), 31.33.453.4040 (Europe),

65.6383.4400 (Asia), or 81.3.3511.7655 (Japan) to receive an RA# (Return Authorization
number). This will begin the repair process as quickly as possible.

Units must be returned insured, with shipping charges prepaid. If not insured, you
assume the risk of loss or damage during shipment. Returned units must include the
serial number and a description of the problem, as well as the name of the person to
contact in case there are any questions.

Extron Electronics makes no further warranties either expressed or implied with
respect to the product and its quality, performance, merchantability, or fitness for any
particular use. In no event will Extron Electronics be liable for direct, indirect, or
consequential damages resulting from any defect in this product even if Extron
Electronics has been advised of such damage.

Please note that laws vary from state to state and country to country, and that some
provisions of this warranty may not apply to you.

Extron Electronics, Europe

Extron Electronics, Japan

Table of Contents

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

About the ASA Series .......................................................... 1-2

Features ...................................................................................... 1-2

Chapter 2 • Installation and Operation ......................... 2-1

Mounting the ASA 101 ....................................................... 2-2

Mounting the ASA 204 and ASA 304 .......................... 2-2

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

Rack mounting....................................................................... 2-2

Furniture mounting ............................................................... 2-4

Projector mounting ............................................................... 2-5

ASA 101 Features and Cabling ....................................... 2-6

ASA 204/ASA 304 Front Panel Features .................... 2-6

ASA 204/ASA 304 Rear Panel Features

and Cabling ............................................................................... 2-7

Appendix A • Specifications, Part Numbers,

and Accessories.............................................................................. A-1

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

Included Parts ......................................................................... A-5

ASA 101 part numbers ......................................................... A-5

ASA 204/ASA 304 part numbers .......................................... A-5

ASA 204/ASA 304 Optional Accessories .................... A-5

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

68-776-01 Rev. C

Printed in the USA

12 03

iASA Series • Table of Contents

Table of Contents, cont’d

ASA Series

Chapter One

1

Introduction

About the ASA Series

Features

ii

ASA Series • Table of Contents

Introduction

About the ASA Series

The Extron ASA series high-performance audio summing
amplifiers convert stereo audio signals into balanced or
unbalanced mono signals. The series consists of the following
three models:

ASA 101 — The ASA 101 is a single, ultra-compact passive
summing adapter with two male RCA pigtail connectors
for one unbalanced stereo audio input. The unit has one
3-pole captive screw connector for one balanced or
unbalanced mono output.

ASA 204 — The ASA 204 has four independent active
summing amps with four pairs of RCA connectors for
unbalanced line level stereo audio inputs. The unit has
captive screw connectors for four balanced or unbalanced
mono outputs. Because of its input/output configuration,
the ASA 204 can also function as an unbalanced to
balanced audio converter.

ASA 304 — The ASA 304 has four independent active
summing amps with four 5-pole captive screw connectors
for balanced or unbalanced line level stereo audio inputs.
The unit has captive screw connectors for four balanced or
unbalanced mono outputs.

The ASA 204 and ASA 304 include an external 12V power
supply that accepts 100-240VAC input. The ASA 101 is a passive
device that does not need a power supply.

Features

Four summing amps in one box — The ASA 204 and ASA 304

can accommodate up to four stereo source devices,
eliminating the need for four separate summing
amplifiers.

Furniture, projector, and rack mountability — The ASA 204

and ASA 304 can be mounted under a desk, podium, or
other furniture, or secured to a projector mount with
optional brackets. Alternatively, they can be mounted on
an optional VersaTools™ or universal rack shelf. The
ASA 101 can be mounted in many convenient spaces
using the supplied double-sided Velcro

DIP switch selectable audio gain — Each ASA 204 and ASA 304

has a DIP switch that can be set to achieve unity gain with
either balanced or unbalanced output wiring, or ±6dB for
level shifting.

®

tape.

Extron
SW 6AV RCA

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Ceiling Speakers

Extron
ASA 101

Audio Summing
Adapter

Mono Distributed Sound
System

Figure 1-1 — Typical ASA 101 application

Zone 1 Ceiling

Speakers

Distributed Sound
System

Extron

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Program
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Audio
Amplifier

ASA 204

Audio Summing
Amplifier

Video Camera

CD Player

DVD Player

VCR

Figure 1-2 — Typical ASA 204 application

2' long

Zone 2 Ceiling

Speakers

Distributed Sound
System

Mono Audio
Matrix

1-2

ASA Series • Introduction

ASA Series • Introduction

1-3

Introduction, cont’d

Zone 1 Ceiling

Speakers

Program
Speakers

Audio
Amplifier

Distributed Sound
System

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SUMMING

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AMPLIFIERS

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Extron
ASA 304

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Audio Summing
Amplifier

Video Camera

CD Player

DVD Player VCR

Figure 1-3 — Typical ASA 304 application

Zone 2 Ceiling

Speakers

Distributed Sound
System

Mono Audio
Matrix

ASA Series

Chapter Two

2

1-4

Installation and Operation

Mounting the ASA 101

Mounting the ASA 204 and ASA 304

ASA 101 Features and Cabling

ASA 204/ASA 304 Front Panel Features

ASA 204/ASA 304 Rear Panel Features and Cabling

ASA Series • Introduction

Installation and Operation

Mounting the ASA 101

The ASA 101 is ultra-compact, and can fit in many convenient
small spaces. Use the supplied double-sided Velcro
mount the unit on a wall or piece of furniture.

Mounting the ASA 204 and ASA 304

The ASA 204 and ASA 304 can be set on a table, or mounted on a
rack shelf, under a desk or tabletop, or on a projector mount.

Tabletop use

Four self-adhesive rubber feet are included with the ASAs.
For tabletop use, attach one foot at each corner of the bottom
side of the unit and place the unit in the desired location.

®

tape to

VersaTools Rack Shelf

Quarter Rack Width False Front

Face Plate

Rack mounting

For optional rack mounting, do not install the rubber feet.
Mount the ASA on a VersaTools 19" 1U rack shelf (Extron
part #60-190-20) or a standard universal 1U rack shelf (Extron
part #60-190-01). On the standard rack shelf, the ASA mounts in
one of four locations to the rear of the rack or in one of four
locations to the front of the rack.

1. Remove rubber feet if they were previously installed on
the bottom of the ASA.

2. Mount the ASA on the rack shelf, using two 4-40 x 3/16"
screws in opposite (diagonal) corners to secure the
amplifier to the shelf.

3. Install blank panel(s) or other unit(s) on the rack shelf.

4. Attach the rack shelf to the rack using the supplied bolts.

Use 2 mounting holes on

opposite corners.

Figure 2-1 — Mounting the ASA 204 or ASA 304 on
a VersaTools rack shelf

Only products in the VersaTools line can be mounted on
a VersaTools shelf. Most 1U rack-mountable Extron
products can be mounted on the standard shelf.

(2) 4-40 x 3/16" Screws

2-2

ASA Series • Installation and Operation

Figure 2-2 — Mounting the ASA 204 or ASA 304 on
a standard 1U rack shelf

ASA Series • Installation and Operation

2-3

Installation and Operation, cont’d

Furniture mounting

Furniture mount the ASA using the optional mounting kit
(part #70-212-01) as follows:

1. Remove rubber feet if they were previously installed on the
bottom of the ASA.

2. Attach the furniture mounting brackets to the ASA with the
machine screws provided.

3. Hold the ASA with the attached brackets against the
underside of the table or other furniture. Mark the location
of the screw holes of the bracket on the mounting surface.

4. Drill 3/32” (2 mm) diameter pilot holes, 1/4” (6.3 mm) deep
in the mounting surface at the marked screw locations.

5. Insert #8 wood screws into the four pilot holes. Tighten
each screw into the mounting surface until just less than
1/4” of the screw protrudes.

6. Align the mounting screws with the slots in the brackets
and place the ASA against the surface, with the screws
through the bracket slots. See the illustration below.

7. Slide the ASA slightly forward or back, then tighten all four
screws to secure the unit in place.

Projector mounting

Projector mount the ASA using the optional mounting kit
(part #70-217-01) as follows:

1. Remove rubber feet if they were previously installed on the
bottom of the ASA.

2. Attach the projector mounting brackets to the ASA with the
machine screws provided.

3. Secure the ASA to a projector mount or other surface by
inserting the mounting bolt through the bracket’s slotted
hole, as shown below.

Projector
Mounting
Bracket

Mounting
Bolt

A

4

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Figure 2-3 — Mounting the ASA 204 or ASA 304
under furniture

ASA Series • Installation and Operation

Digital Projector

Figure 2-4 — Mounting the ASA 204 (shown) or
ASA 304 on a projector mount

ASA Series • Installation and Operation

2-52-4

Installation and Operation, cont’d

POWER

12V

.2A MAX

STEREO INPUTS

MONO OUTPUTS

BAL

UNBAL

ON

SPARE

3

1

4

2

43

21

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QUAD AUDIO
SUMMING
AMPLIFIERS

R

ASA

204

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1

2

STEREO INPUTS

BAL

UNBAL

ON

SPARE

MONO OUTPUTS

3

1

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2

ASA
304

3

1

4

2

LR

LR

POWER

12V

.2A MAX

QUAD AUDIO
SUMMING
AMPLIFIERS

LR

LR

4

1

2

3

ASA 101 Features and Cabling

2

Input plugs — Plug the white RCA connector into the left

1

output of the stereo source device. Plug the red RCA connector
into the right output of the stereo source device.

Output connector — Strip the wires from the mono destination

2

device, insert them into this 3-pole captive screw connector, and
secure them by turning the screws (see the illustration below).

Tip

See Caution

Sleeve

Unbalanced Output Balanced Output

CAUTION

Connect the sleeve to ground (Gnd). Connecting

Ring

Sleeve

Tip

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

ASA 204/ASA 304 Front Panel Features

1

ASA 204/ASA 304 Rear Panel Features and
Cabling

1

ASA 204

ASA 304

ASA 204 input connectors —

1

Plug up to four stereo audio sources
into these female RCA connectors.
If you do not have pre-terminated
audio cable, wire the male RCA
connectors for unbalanced input as
shown at right.

Tip (+)

Sleeve ( )

2-6

Power LED — Lights to indicate that the ASA is on.

1

ASA Series • Installation and Operation

ASA 304 input connectors — Plug up to four stereo audio
sources into these 5-pole captive screw connectors. Connectors
are included with each ASA, but you must supply the audio
cable. Wire the connectors for the appropriate input type and
impedance level as shown below. High impedance is generally
over 800 ohms.

Tip

Sleeve

Tip

Sleeve

Unbalanced Input

(high impedance)

Tip

Ring

Sleeve (s)

Tip

Ring

Balanced Input

(high impedance) (600 ohms)

Sleeve (s)

ASA Series • Installation and Operation

Tip

Ring

Tip

Ring

Balanced Input

600 ohms

600 ohms

2-7

Installation and Operation, cont’d

L

Output connectors — Plug the mono audio output devices into

2

these 5-pole captive screw connectors. Two devices can be
connected to each connector. Wire the connectors as shown
below.

Sleeve

Tip

See Caution

Ring

Sleeve

Tip

ASA Series

SPARE

ON

Unbalanced Output

CAUTION

Output gain DIP switch — Use this switch to set the audio

3

output gain level. Gain levels available via the switch vary
depending on whether both inputs are receiving signals, and on
the output wiring, as shown in the table below. (The switch

UNBA

marked SPARE has no function.)

Input Channel Output Output DIP Switch Settings

BAL

Left Right wiring Unbalanced Balanced

signal signal balanced +9dB +3dB
signal —— balanced +3dB -3dB

—— signal balanced +3dB -3dB

signal signal unbalanced +3dB -3dB
signal —— unbalanced -3dB -9dB

—— signal unbalanced -3dB -9dB

Power connector — An external 12V power supply is included

4

with the unit. Plug it into this 2-pole captive screw connector.

CAUTION

AA

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

When connecting the power supply, voltage polarity
is extremely important. Applying power with
incorrect voltage polarity could damage the power
supply and the ASA. Identify the power cord
negative lead by the ridges on the side of the cord or
a black heat shrink wrapping around it.

Balanced Output

Appendix A

A

Specifications, Part Numbers,

and Accessories

Specifications

2-8

Power Supply

Output Cord

ASA Series • Installation and Operation

SECTION A–A

Do not tin the stripped power supply leads before
installing the captive screw connector. Tinned wires are
not as secure in the captive screw connectors and could
be pulled out.

The two power cord wires must be kept separate
while the power supply is plugged in. Remove
power before wiring.

Captive Screw

Connector

Included Parts

ASA 204/ASA 304 Optional Accessories

Specifications, Part Numbers, and Accessories

p

Audio

Gain

ASA 101 ............................. +6dB (with balanced output), 0dB (with

unbalanced output)

Input Channel Output Wiring

Left Right Unbalanced Balanced

signal signal 0dB +6dB
signal ——* 0dB +6dB

——* signal 0dB +6dB

*Tested with this in

ut unplugged

ASA 204, ASA 304 ........... Generally unity. Actual gain depends on

whether or not both inputs have signals
and also on the output wiring and DIP
switch settings. See the table below.

Input Channel Output Output DIP Switch Settings

Left Right

signal signal balanced +9dB +3dB
signal —— balanced +3dB -3dB

—— signal balanced +3dB -3dB

signal signal unbalanced +3dB -3dB
signal —— unbalanced -3dB -9dB

—— signal unbalanced -3dB -9dB

wiring

Unbalanced Balanced

Frequency response

ASA 101 ............................. 70 Hz to 20 kHz, -3dB (with a 600 ohm

load)

ASA 204, ASA 304 ........... 20 Hz to 20 kHz, ±0.05dB

THD + Noise

ASA 101 ............................ 0.07% (typical) @ 1 kHz at nominal level

ASA 204, ASA 304 ........... 0.03% @ 1 kHz at nominal level

S/N ............................................... >90dB (balanced) at rated maximum

output

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

Audio input

Number/signal type

ASA 101 ............................. 1 stereo, unbalanced

ASA 204 ............................. 4 stereo, unbalanced

ASA 304 ............................. 4 stereo, balanced/unbalanced

Connectors

ASA 101 ............................. 1 pair of male RCA (tip-ring)

ASA 204 ............................. 4 pairs of female RCA (tip-ring)

ASA 304 ............................. (4) 3.5 mm captive screw connectors,

5 pole

Impedance

ASA 101 ............................. >10 kohms unbalanced (with a 20 kohm

load)

ASA 204 ............................. >10 kohms unbalanced, DC coupled

ASA 304 ............................. >17 kohms unbalanced, 23 kohms

balanced, DC coupled

Nominal level ............................... -10dBV (316mV) or +4dBu (1.23V)

Maximum level

ASA 101 ............................. +15dBu (4.4V), (balanced or unbalanced)

at 1% THD+N

ASA 204, ASA 304 ........... +20dBu (7.75V), (balanced or unbalanced)

at 1% THD+N

Audio output

Number/signal type

ASA 101 ............................. 1 mono, balanced/unbalanced

ASA 204, ASA 304 ........... 4 mono, balanced/unbalanced

Connectors

ASA 101 ............................. (1) 3.5 mm direct insertion captive screw

connector, 3 pole

ASA 204, ASA 304 ........... (2) 3.5 mm captive screw connectors,

5 pole (double stacked)

Impedance

ASA 101 ............................. <100 ohms unbalanced (with 50 ohm

input impedance)

ASA 204, ASA 304 ........... <50 ohms unbalanced, 100 ohms balanced

Nominal level ............................... -10dBV (316mV) or +4dBu (1.23V)

Maximum level (Hi-Z) (ASA 204, ASA 304 only)

>+23dBu, balanced; or >+17dBu,

unbalanced at 1% THD+N

Maximum level (600 ohm) (all models)

>+21dBm, balanced; or >15dBu,

unbalanced at 1% THD+N

0dBu = 0.775V, 0dBV = 1V, 0dBV 2dBu.

ASA Series • Specifications, Part Numbers, and Accessories

ASA Series• Specifications, Part Numbers, and Accessories

A-3A-2

Specifications, Part Numbers, Accessories, cont’d

General

Power — ASA 204, ASA 304 ...... 100VAC to 240VAC, 50/60 Hz, 3 watts,

external, autoswitchable; to 12VDC, 1 A
power supply. Product requires 0.2 A.

Temperature/humidity .............. Storage -40° to +158°F (-40° to +70°C) /

10% to 90%, noncondensing
Operating +32° to +122°F (0° to +50°C) /
10% to 90%, noncondensing

Rack mount

ASA 101 ............................. Can be attached to any flat surface with

supplied Velcro

ASA 204, ASA 304 ........... Yes, with optional rack shelf, part

#60-190-01 or 60-190-20.
Also furniture mountable with optional
under desk mounting brackets,
#70-212-01, or projector mountable with
bracket kit #70-217-01.

Enclosure type

ASA 101 ............................. Molded plastic

ASA 204, ASA 304 ........... Metal

Enclosure dimensions

ASA 101 ............................. 0.7" H x 1.0" W x 1.5" D

1.8 cm H x 2.5 cm W x 3.8 cm D
(Depth excludes 24 inch long pigtails.)

ASA 204, ASA 304 ........... 1.7" H x 4.3" W x 3.0" D (1U high, quarter

rack width)

4.3 cm H x 10.9 cm W x 7.6 cm D
(Depth excludes connectors.)

Product weight

ASA 101 ............................. 0.2 lbs (0.1 kg)

ASA 204, ASA 304 ........... 0.5 lbs (0.3 kg)

Shipping weight

ASA 101 ............................. 1 lb (1 kg)

ASA 204, ASA 304 ........... 3 lbs (2 kg)

Vibration ....................................... ISTA/NSTA 1A in carton (International

Safe Transit Association)

Listings .......................................... UL, CUL

Compliances ................................. CE, FCC Class A, VCCI, AS/NZS, ICES

MTBF ............................................. 30,000 hours

Warranty ....................................... 3 years parts and labor

Specifications are subject to change without notice.

®

Included Parts

ASA 101 part numbers

These items are included in each order for an ASA 101:

Replacement

Included parts part number

ASA 101 60-551-01

Double-sided Velcro® tape

ASA 101 instruction card

ASA 204/ASA 304 part numbers

These items are included in each order for an ASA 204 or 304:

Replacement

Included parts part number

ASA 204 60-552-30

or

ASA 304 60-552-20

Desktop power supply (12V, 0.1A) 70-055-01

IEC power cord 27-044-01

3.5 mm, 5-pole captive screw connectors 10-319-10
(2 for ASA 204, 6 for ASA 304)

3.5 mm, 2-pole captive screw connector 10-319-05

Tweeker (small screwdriver)

ASA Series User’s Manual

ASA 204/ASA 304 Optional Accessories

These items may be ordered separately:

Accessories Part number

VersaTools 1U rack shelf 60-190-20

Standard 1U rack shelf 60-190-01

Mini under-desk mounting bracket 70-212-01

Mini projector mounting bracket 70-217-01

ASA Series• Specifications, Part Numbers, and AccessoriesASA Series • Specifications, Part Numbers, and AccessoriesA-4

A-5

Specifications, Part Numbers, Accessories, cont’d

ASA Series • Specifications, Part Numbers, and AccessoriesA-6