ATA1-1R
USER MANUAL
MANUAL DE INSTRUCCIONES
NOTICE D'UTILISATION
BEDIENUNGSANLEITUNG
ATA1-1R
INSTRUCTION MANUAL
1. IMPORTANT REMARK 04
1.1. Safety Precautions 04
2. INTRODUCTION 04
3. INSTALLATION 05
3.1. Placement and mounting 05
4. OPERATION AND USE 05
4.1. Starting-up 05
4.2. Connection possibilities 06
4.3. Connections 06
4.4 Connection examples 06
4.5 Operation guide 06
5. CLEANING 06
6. DIAGRAMS 07
6.1. Function list 07
6.2. Function diagram 07
6.3. Technical characteristics 23
6.4. Block diagram 23
All numbers subject to variation due to production tolerances. ECLER SA reserves the right to make changes or
improvements in manufacturing or design which may affect specifications.
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1. IMPORTANT REMARK
Congratulations! You are the owner of a carefully designed and manufactured equipment. We
thank you for having purchased our ATA1-1R telephone adapter.
It is VERY IMPORTANT that you read this manual before connecting the amplifier in order to
obtain its maximum performance.
We recommend our authorised Technical Services whenever any maintenance task should be
needed so that optimum operation shall be achieved.
1.1. Safety Precautions
This apparatus must be earthed through its mains cable.
Do not expose the unit to rain or water splashes, and do not place liquid containers or
incandescent objects like candles on top of the unit.
Should any connection / disconnection task be done, always disconnect the unit from the mains
supply.
There are no user serviceable parts inside the unit.
2. INTRODUCTION
The conventional telephone line, due to economic reasons, only provides two cables and obviously
does not support two separate signal ways, e.g. from a transmitter to a listener and from the listener to the
transmitter. In fact, those two signals would be mixed and could not be separated from each other. If we
would connect a telephone line directly to the input of an audio mixer, to pick up the voice of a listener who
calls by phone, the high fidelity signal sent to the line to answer (e.g. the speaker's voice from a radio
program) would also appear on the mixer's input, mixed with the listener's voice and with reduced
bandwidth due to the telephone line's bandwidth (300-3000Hz). Since the telephone signal has to be added
afterwards to the speaker's mic signal using the mixer, to obtain the global program signal, there will be
"two added speaker voices", the original one, with high quality, and the other one that appears inevitably on
the telephone line, with reduced bandwidth. The result, possible positive feedback (coupling) and changes
on the speaker's voice, reinforced between 300 and 3000Hz and therefore characterized by an appreciable
nasality.
The telephone adapter is a device that, connected between the mixer and the telephone line, allows
receiving signals from the line and sending them to the mixer and returning signals from the mixer to the
line, but without returning the signal, necessarily, to the mixer again.
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The main features and application possibilities offered are:
Input for telephone line with output for telephone.
Waiting loop for holding the line in order to attend calls later on, using the phone or passing them to
the program or ringing off definitely.
Once a call has been sent to the program it can be ringed off or passed to the waiting loop again.
The input for the telephone line is protected against voltage peaks.
The line is galvanically isolated from the rest of the circuit by means of transformers.
Level control for the signal received from the telephone line and sent to the mixer.
The speaker's voice return is independent from the line's characteristics, since it is possible to
adjust the line's impedance.
The listener can hear the mixer's signal through the telephone line.
The ATA1-1R has been specially designed to obtain maximum reliability, long life time and the
highest adaptability to the technician's needs, achieving, by this means, an absolute comfort of
operation.
3. INSTALLATION
3.1. Placement and mounting
The main consideration that has to be taken when searching a location for the ATA1-1R is the
maximum working comfort for the operator, allowing to realize the connections as easy as possible.
The ATA1-1R has 19" (482.6mm), 1U (44mm) rack mounting ears that allow you to place it in a
standard rack.
The ATA1-1R, being a low consumption unit, does not need any cooling; you should anyway
avoid exposure to extreme temperatures and the operating environment must be as dry and dust free as
possible.
The ATA1-1R operates under voltages between 90 and 264 V at 47 to 63 Hz. This device
features an over dimensioned power supply that adapts to the mains voltage in any country of the world
with no need to make any adjustments.
In order to protect the unit from eventual mains overloads, it has a time-lag 0.5A mains protection
fuse (11). Should this fuse ever blow off, disconnect the unit from mains and replace it with an identical
one.
NEVER REPLACE THE FUSE WITH ANOTHER ONE WITH A HIGHER VALUE.
ATTENTION: Changing the fuse must be performed by qualified technical personnel.
4. OPERATION AND USE
4.1. Starting-up
This can be done using the POWER switch (4) and immediately lights up a green tally light which is
integrated in the same switch. Even if the noise produced during the power on of the ATA1-1R is as low as
possible, it is always indicated to turn on the devices following the signal flow, so that the amplifier is the
last to be turned on. For turning off the devices you should proceed in reverse order. Following this order,
signal peaks or transients produced with the power on or power off of the devices will not affect the
following units and will not arrive to the loudspeakers, which could easily come to grief under such
conditions.
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4.2. Connection possibilities
The ATA1-1R has an internal mixer allowing the signal from the telephone line and the program
signal to be present on the output. Using the "PGM BYPASS" switch located on the backside of the unit it is
possible to select if the program signal has to be mixed with the telephone line signal or not. The position of
this switch depends on the actual connections. The ATA1-1R has to be turned on to allow the program
signal to pass through.
4.3. Connections
The telephone line has to be connected to the "LINE" input and the telephone to the "TEL" output
using RJ11 connectors.
The input signal has to be connected to "PGM IN" input and the output signal to "OUTPUT". The audio
signals use RCA connectors.
4.4 Connection examples
Option 1: Using the "AUX OUT / AUX IN" from the auxiliary bus from a mixing desk.
Option 2: Using the "SEND / RECEIVE" function from the main mix bus (or the mixer's main output;
in this case the ATA1-1R's "OUTPUT" can be used as general output)
Option 3: Using the "SEND / RECEIVE" from the speaker's mic channel. In this case only the voice would
be sent to the telephone line, but not the music.
4.5 Operation guide
With the switch (1) in "TEL. SET" position, the listener can be called using the telephone. This
signal will not be present on the ATA1-1R's output.
To hold the telephone line, the switch has to be put to "HOLD" position. After that, the telephone
can be ringed off. In this situation the listener hears the signal connected to "PGM IN" input (7), but his
voice will not leave the "OUTPUT" (9).
Putting the switch in "ON AIR" position, the listener's voice can be heard. The level can be
adjusted using the "VOL" pot (3).
The line adjustment can be done with the "IMPEDANCE ADJ" control (2). With a call on line this control
has to be adjusted until the level difference between the "HOLD" and the "ON AIR" position is as low as
possible, having the volume (3) at maximum.
5. CLEANING
The front panel should not be cleaned with dissolvent or abrasive substances because
silk-printing could be damaged. To clean it, use a soft cloth slightly wet with water and neutral liquid
soap; dry it with a clean cloth. Be careful that water never gets into the amplifier through the holes of the
front panel.
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6. DIAGRAMS
6.1. Function list
1. Operation selector
2. Line impedance adjust, INPEDANCE ADJ
3. Volume control, VOL
4. Power switch and pilot light, POWER
5. Telephone line connection, LINE
6. Telephone set connector, TEL
7. Audio input, PGM IN
8. PGM bypass switch, PGM BYPASS
9. Audio output, OUTPUT
10. Ground pin, GND
11. Fuse holder
12. Mains socket
6.2. Function diagram
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MANUAL DE INSTRUCCIONES
1. NOTA IMPORTANTE 09
1.1. Precauciones 09
2. INTRODUCCIÓN 09
3. INSTALACIÓN 10
3.1. Ubicación y montaje 10
4. OPERACIÓN Y USO 10
4.1. Puesta en funcionamiento 10
4.2. Posibilidades de conexionado 11
4.3. Conexionado 11
4.4. Ejemplos de conexión 11
4.5. Modo de operación 11
5. LIMPIEZA 11
6. DIAGRAMAS 12
6.1. Lista de funciones 12
6.2. Diagrama de funciones 12
6.3. Características técnicas 23
6.4. Diagrama de bloques 23
Todos los datos están sujetos a variación debida a tolerancias de producción. ECLER S.A. se reserva el derecho de
realizar cambios o mejoras en la fabricación o diseño que pudieran afectar las especificaciones.
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