Phoenix ILA-1000 Instruction Manual

ENGLISH

Instruction manual

Phoenix Professional Audio GmbH Gewerbepark Conradty 12 D-83059 KOLBERMOOR Tel. 0049-(0)8031-30425-0 Fax. 0049-(0)8031-30425-25 www.phoenix-pa.com shop.phoenix-pa.com info@phoenix-pa.com



ILA-1000

DOC-0120216

Made in EU

For systems

according to

EN 60118-4

IEC 118-4

AUTOMATIC INDUCTION LOOP AMPLIFIER ILA-1000

Now new with „MLC“ control to correct frequency errors, COMPRESSOR, control of the loop impedance and SPEAKON output jack.

Features:

- Digital Automatic audio signal compressor

- Loop detector for the automatic measurement and power adjustment to the loop impedance.

- Equalization by 2-element LF/HF -EQ

- „MLC“ control to correct frequency errors.

- All control elements are installed countersunk and provide protection against faulty operations.



Instruction manual

1. Read this instruction carefully.

2. Save this instruction well.

3. Consider all warnings.

4. Follow all instructions.

5. ATTENTION: to avoid ﬁres and electric shocks, this system may not be exposed to rain and humidity. Do not use this device close to waters.

6. Clean it only with a dry cloth.

7. Do not cover any air vents.

8. Do not put it close to heat sources like radiators, hot air dampers, ovens or other devices (including ampliﬁers) which emit warmth.

9. Do not override the safety functions of the inverse-polarity protection or safety plug. A plug with inverse-polarity protection has two pins, and one of them is wider than the other (only for USA/Canada). A safety plug has two pins and one ground pole (only for USA/Canada). The wide pin or the third pole are intended for your safety. When the supplied plug does not ﬁt into your socket, the socket is obsolete and has to be replaced by an electrician.

10. Pass the power cable in a way, that nobody can step on it and that it cannot be jammed. This is especially valid for plugs, sockets and the place where the cable comes out of the device.

11. Only use products and accessories speciﬁed by Phoenix Professional Audio GmbH, Inc.

12. Let maintenance operations only be carried out by qualiﬁed maintenance staff. The device has always to be maintained if it has been damaged in any way, f.i. when the power cable or the mains plug is damaged, if liquids have been spilled on the device or objects have been fallen into it, if the device has been exposed to rain or humidity, if it does not work normally or if it has been fallen down.

The exclamation mark in a triangle shall advise the user of the existence of important instruction guides and maintenance instructions in this manual.

The symbol consisting of a ﬂash with an arrowhead in a triangle shall advise the user of the existence of unisolated, dangerous voltages within the housing, which can be strong enough to give an electric shock.

ATTENTION: TO REDUCE THE RISK OF ELECTRIC SHOCKS, DO NOT REMOVE THE COVER. USE QUALIFIED STAFF FOR ALL MAINTENANCE OPERATIONS.

Important safety precautions and symbol explanation

EXPLANATION OF THE GRAPHIC SYMBOLS

2.

The new redesign ILA-1000 represents a loop ampliﬁer as professional solution for the construction of induction loops. The ILA-1000 loop ampliﬁer for audio transmission is used on a large scale, to supply hearing devices by inductive audio signals.

The ILA-1000 automatic induction loop ampliﬁer has been developed as high-quality LOOP ampliﬁer for average induction loops. The system is characterized by particularly easy installation, customer-focused operation and easy use of the device with optimum performance.

Induction loop ampliﬁers are very often used in churches, cinemas, theatres, sales agencies, libraries, press rooms, lecture rooms, court rooms, counters, interpreter systems or DRIVE IN / DRIVE-THROUGH, so that wearer of hearing devices under difﬁcult acoustic conditions (background noises, reverberation etc.) can hear much better without disturbing noises.

Advantages of the system:

By the inductive coupling of hearing devices, the wanted signal (audio transmission) can be heard much better without disturbing noises. By the transmission of an audio signal through the induction loop, an acceptable wanted signal/interfering signal ratio is reached.

Useful information:

A pure acoustic, direct sound transmission (between speaker and hearing device) caused by reverberation and background noises considerably deteriorates the perception of the wanted signal for the wearer of the hearing device.

Receiver ILA-E:

With the induction loop receiver ILA-E a loop system can be checked or maintained in an easy way, fast and uncomplicated.

The device is especially suitable for responsible staff, wherever the induction transmission is installed, or for people who need a high-quality „wireless“ hearing devices without hearing aid, f.i. for channel interpreting systems.

Planning of the loop design:

Not anywhere, where it would be desirable, acceptable or good conditions for laying the induction loop can be found. Therefore it is necessary in the planning phase, to examine a suggested place regarding the following conditions:

- The magnetic interference ﬁelds of electrical systems, f.i. heating systems in the ﬂoor or in the roof area and the electronic controls of lighting systems (especially in cinemas, theatres etc.)

- The inﬂuence of magnetically or electrically conductive materials in the building structure, especially where the loop shall be installed.

- The presence of other induction loops in the neighborhood, whose signals could interfere with the signals of the planned loops.



Instruction manual

GENERAL

3.



Instruction manual

GENERAL

Unfortunately it is still the common practice to assemble the 100 V power ampliﬁers with the additional audio transformer. Such systems are fundamentally wrong, as they show an unfavorable frequency response.

Such a system conﬁguration raises the inductance with increasing frequency, so that the high frequencies which are important for the speech intelligibility cannot be emitted anymore.

Induction loop ampliﬁers do not have this disadvantage, therefore they are optimally suitable by the use of dynamic processors and special ampliﬁer technology (constant current source) to produce a constant ﬁeld strength.

Control

All important functions of the induction loop ampliﬁer are controlled.

That means the ILA-1000 induction loop ampliﬁer controls its internal power ﬁnal stage, the functional efﬁciency of the connected induction loop with a pilot tone pulse. If a controlled function fails, the yellow LED in the ampliﬁer´s front of the induction loop ampliﬁer does not light and the error contact „INFO LOOP OK“ [15VDC] is currentless.

Compatibility according to EN 60118-4:

The most important attention at the redesign has been put to the compatibility of the system with the norm EN 60118-4, so that a loop structure according to a „LOOP SEGMENT“ system is possible.

In a „LOOP SEGMENT“ system always two ILA-1000 work together which form a magnetic ﬁeld, thus on the entire area always the constant ﬁeld strength of the magnetic ﬁeld is reached.

The magnetic ﬁeld outside the intended range loses quite rapidly strength and drops to ZERO. This is done by connecting a phase shifter FS-1 which is switched between the two ILA-1000, which in turn produces a signal phase difference of 90 degrees in the electrical ﬂow by two adjacent induction loops.

Further instructions for loop laying with use of a phase shifter FS-1 are exactly described in the further chapter.

4.



Instruction manual

Before start-up of the ampliﬁer ILA-1000 we ask you to read the safety instructions carefully. Please carry the installation out according to the following guidelines:

In a clearly visible position close to the entrance to the area where an induction loop is installed, a sign „ INDUCTIVE COUPLING“ should be ﬁxed.

1 - Always put the ampliﬁer onto a smooth and stable lower surface. 2 - Choose a dry surrounding and do not put any liquids onto the ampliﬁer. 3 - Avoid the closeness to heat sources. 4 - Never open the housing of the ampliﬁer, without pulling the mains plug out of the socket before. 5 - Only connect the device to 230 VAC mains voltage.

SAFETY INSTRUCTIONS

- Cooling element with a temperature-controlled fan control

- Short circuit protection - overheat control - open circuit protection - overload protection

- LED - level indication „compressor“

- LED - level indication „output level“

- LED - indication loop detector „ERROR“

- LED - indication temperature „TEMP“

- LED - indication „OVERLOAD“

- LED - indication „system POWER-ON“

- SOFT START and MEASUREMENT with ﬂashing „POWER LED“

- Balanced microphone/line inputs

- INSERT PORT in-/output

- Phönix connections for LOOP line

- Phönix connections for LOOP CONTROL

- Separate volume control for all inputs

- Countersunk volume controls, LF/HF-EQ control and MLC control at the front side

- Compression LED indication 3 to 33 dB

- Output level LED indication -27 to 0 dB

- Shiftable phantom power (DIP switch at the rear side)

- Shiftable GAIN system (signal increase for +15dB)

- 19“ brackets can be removed for desktop version

- Space-saving 1 U housing version

- Possible loop area 300 m² to 1300m² (depending on loop laying or loop design)

- Control of the loop impedance in the range from 0.5 Ohm to 3.0 Ohm

MAIN FEATURES

5.

1.- MIC.-1 This control determines the sensitivity (volume) of the „MIC-1“ input.

2.- MIC.-2/ LINE This control determines the sensitivity (volume) of the „MIC-2/LINE“ input.

3.- LINE This control determines the sensitivity (volume) of the „LINE“ input.

4.- MASTER

With this control the electrical current ﬂow of the loop can be adjusted.

5.- MLC-„METAL LOSS CORRECTION“

Control to correct frequency response errors which are caused by metals close to the induction loop

Useful information:

Turn the MLC control to reach the best sound (audio signal) on the induction loop, simultaneously listen to the audio signal with the ILA-E receiver by the headphone. Repeat the measuring process in all ILA-1000 induction loop ampliﬁers or induction loops bound in the system.

6.- HIGH-EQ ﬁlter (+-12dB)

LF control of the individual microphone- or LINE inputs.

7.- HIGH-EQ ﬁlter

HF-EQ control in the range (+/- 12 dB), HF-control of the individual microphone- or LINE inputs.

8.- COMPRESSOR

LED indication (3 dB to 33 dB)

9.- OUTPUT LEVEL

Output level LED indication (-27 dB to 0 dB).

IMPORTANT:

In case of system DISORDER (ERROR LED lights) no output level is indicated!



Instruction manual

FRONT SIDE

1 2 3 4 5 6 7 8 9 10 11 12 13 14

6.

10.- ERROR

Fault indication for loop impedance (impedance is not within the measurement range of 0.5 -3.0 Ohm).

IMPORTANT:

After eliminating the fault please always „reset“ the loop ampliﬁer ILA-1000“ by switching the ampliﬁer off with the POWER button, wait for 3 sec. and switch it on again with the POWER button.

The measuring cycle (PILOT TONE) is activated again and the POWER LED ﬂashes.

11.- TEMP

Error message indication, the ampliﬁer´s temperature is too high (in this condition the ampliﬁer is deactivated)

12.- POWER operation display

Condition-1 LED ﬂashes, system measurement is carried out and the turn-on delay is active. Condition-2 LED lights, the system is activated and the measurement of the loop impedance is ﬁnished.

13.- OVERLOAD

Overload indication, LED lights or ﬂashes when an overload is measured, the LIMITER is activated.

14.- ON/OFF - mains switch



Instruction manual

FRONT SIDE

1 2 3 4 5 6 7 8 9 10 11 12 13 14

7.

Phoenix ILA-1000 Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual