Phoenix ILA-1000 User manual

Brand: Phoenix

Model: ILA-1000

Type: User 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

[email protected]



Phoenix logo is registered at the German Patent- and Trademark Ofﬁce (TM)

All brands are property of their respective owners.

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.

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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socket, the socket is obsolete and has to be replaced by an electrician.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 in-

struction 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

Phoenix logo is registered at the German Patent- and Trademark Ofﬁce (TM)

All brands are property of their respective owners.

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 uncom-

plicated.

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.

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Instruction manual

GENERAL

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All brands are property of their respective owners.

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Instruction manual

GENERAL

Phoenix logo is registered at the German Patent- and Trademark Ofﬁce (TM)

All brands are property of their respective owners.

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 con-

necting 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.



Instruction manual

Phoenix logo is registered at the German Patent- and Trademark Ofﬁce (TM)

All brands are property of their respective owners.

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

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!

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Instruction manual

FRONT SIDE

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

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

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Instruction manual

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FRONT SIDE

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

1.- LOOP CABLE

SPEAKON jack 2-poled, the loop line shall be connected to the clamps (+ Pin) and (- Pin).

2.- AMLIFIER/LOOP CONTROL

Fault indicator output 15VDC, the contact remains isolated when the ampliﬁer and the induction loop work failure-

free. The contact is supplied with 15VDC voltage, as long as a system failure or loop error is present.

3.- DC OUTPUT (+15VDC/-15VDC)

Balanced output voltage +/-15VDC, is used for connection or power supply of a phase shifter FS-1.

4.- INSERT

The INSERT jack is unbalanced connected, it is used to connect external processing devices like f.i. additional EQ´s

or FS-1 phase shifter. When the plug is not plugged in or no accessory device is connected with INSERT, the signal

path is interconnected 1 to 1.

5.- LINE OUTPUT [LINE-OUT]

Balanced audio signal output to JACK bush (max. 0 dB).

6.- MODE-SWITCH MIC.-LINE

With this switch you determine the sensitivity of the input MIC.2/LINE. Shiftable between microphone and line level.

Attention:

Always adjust the correct input sensitivity, otherwise in spite of automatic device a too high signal level is reached

at the input (position to MIC. and input signal with LINE level), so that the ampliﬁer cannot properly process the

signal and the signal can be reproduced distorted at the loop output.

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Instruction manual

REAR SIDE/CONNECTIONS

1 2 3 4 5 6 7 8 9

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7.- SWITCH/DIP switch GAIN/PHANTOM

DIP-1 (ON) the sensitivity of the input is raised for +15 dB

DIP-1 (OFF) standard sensitivity of the input is adjusted

DIP-2 (ON) the input MIC.-2/LINE is supplied with 15VDC phantom power for condenser microphones

DIP-2 (OFF) the phantom power is deactivated.

8.- MIC.2/LINE INPUT

The input is designed balanced (+2), (-3), (1-shielding) (see drawing).

The input sensitivity is adjusted at the device´s front side with separate control MIC.2/LINE and by DIP-1 or MODE

SWITCH.

MODE-SWITCH MIC.-LINE

With this switch you determine the sensitivity of the input MIC.2/LINE between microphone and line level.

DIP-1 (ON) the sensitivity of the input is raised for +15 dB.

DIP-1 (OFF) standard sensitivity of the input is adjusted.

ATTENTION

All XLR inputs have a shiftable phantom power 15VDC, DIP-2 (ON-position). If unbalanced, dynamic microphones

shall be connected to the audio inputs, a coupling condenser has to be added or the phantom power has to be

switched off, DIP-2 (OFF-position).

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Instruction manual

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REAR SIDE/CONNECTIONS

1 2 3 4 5 6 7 8 9 10

Unbalanced inputs: isolate the wire lines for 6 mm and connect

them as shown with the clamps. The pin in the middle has to be

connected with the shielding pin as shown. Tighten the screws

ﬁrmly.

1 GND

2 +IN

3 -IN

1 GND and wire link to 3

2 +IN

Balanced inputs: isolate the wire lines for 6 mm and connect

them as shown with the clamps. Tighten the screws ﬁrmly.

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Instruction manual

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REAR SIDE/CONNECTORS

1 2 3 4 5 6 7 8 9 10

9.- SWITCH/ DIP switch GAIN/PHANTOM

DIP-1 (ON) the sensitivity of the input is increased for +15 dB

DIP-1 (OFF) standard sensitivity of the input is adjusted

DIP-2 (ON) the input MIC.-2/LINE is supplied with 15VDC phantom power for condenser microphones

DIP-2 (OFF) the phantom power is deactivated.

10.- MIC.1 INPUT

The input is designed balanced (+2), (-3), (1-shielding) (see drawing).

The input sensitivity is adjusted at the device´s front side with separate control MIC.2/LINE and by DIP-1 or MODE-

SWITCH.

ATTENTION

All XLR inputs have a shiftable phantom power 15VDC, DIP-2 (ON-position). If unbalanced, dynamic microphones

shall be connected to the audio inputs, a coupling condenser has to be added or the phantom power has to be

switched off DIP-2 (OFF-position).

10.

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Instruction manual

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TECHNICAL ATTACHMENT

To provide a perfect sound signal also for users of hearing devices, so-called induction loops are laid. Here the signal

is transferred inductively by means of a loop laid in the room into a receiver coil located in the hearing device.

The induction loop has to be laid in a way, that it encloses the intended effective area. The impedance of the loop is

approximately equal to the DC resistance.

When laying the loop in concrete, PVC conduit has to be used, IN NO CASE STEEL TUBE.

In case of difﬁcult structural conditions, previously a test loop has to be laid out and the supply has to be checked.

NOTE:

Directly above the loop wires the reception is worst, as the ﬁeld lines run horizontally there.

Line cross-section

Line min. length Line max. length

0.5 mm

15 meter 90 meter

1.0 mm

30 meter 130 meter

1.5 mm

42 meter 160 meter

2.5 mm

71 meter 180 meter

4.0 mm

115 meter 190 meter

CONSTRUCTION EASY LOOP SYSTEM „Single Array System“

An easy induction loop system consists of a LOOP ampliﬁer ILA-1000 and one or more induction loops of the same

size, see drawing.

ILA1000 LOOP- AMP

ILA-1000 LOOP- AMP

Illustration 1.1 shows single loop according to DIN EN 60118-4 Illustration 1.2 shows double loop according to DIN EN 60118-4

11.

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Instruction manual

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Please lead parallel lines close together

A signiﬁcantly better result (constant ﬁeld strength) than in single loops is reached by the laying of „LOOP-SEGMENT“

loops. The individual segments have to be of the same size, the distances should be between 2 meters and 5 meters.

Application example: Tiers in theaters, churches, schools etc.

IMPORTANT:

The disadvantage of the LOOP-SEGMENT loop without phase shifter is:

Wherever two loop lines are parallel, the ﬁeld strength is equal to „0“! The area of the „0“-ﬁeld strength can be between

some centimeters up to one meter.

IMPORTANT:

Rooms and areas where an induction loop is laid, should be marked accordingly.

CONSTRUCTION EASY LOOP SYSTEM „Single Array System“

12.

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Instruction manual

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The example shows an induction loop with limitation of the induction ﬁeld to the side room.

The additional limitation loop is suitable mainly for applications, where a partitioning by f.i. sheetrocks has been

carried out, or where two independent variable loops with different auditory signals shall be processed.

The length of the additional turn of the limitation loop shall be in the ratio of about 1:11.

The indications refer to a square room!

IMPORTANT:

Rooms and areas, in which an induction loop is laid, should be marked accordingly.

LOOP SYSTEM WITH EXTINCTION OF THE MAGNETIC FIELD

13.

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Instruction manual

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The best result (a constant ﬁeld strength) is reached by laying „DOUBLE LOOP SEGMENT“ with phase shift.

Compatibility according to EN 60118-4.

Such double LOOP-SEGMENT induction loops are recommended for large areas and large induction ﬁeld inﬂuence

by metallic objects located in concrete (walls and ﬂoors).

Application examples: big churches, exhibition halls, stations, schools, gyms etc.

Since the laying of the double LOOP-SEGMENT induction loop involves rather high costs, this kind of induction loops

is usually only possible for new buildings or major overhaul of the buildings.

The advantage of the double LOOP-SEGMENT induction loop is the up to 4-fold lower loss of the induction ﬁeld

(low power - large area).

For double LOOP-SEGMENT induction loops, the audio signal is connected to the ﬁrst ILA-1000 LOOP ampliﬁer, this

in turn supplies the ﬁrst loop in the system.

By the phase modulation the audio signal is shifted by 90

phases and transferred to the second ILA-1000, then the

second ILA-1000 has to supply the second parallel induction loop in the whole system.

All LOOP segments should be equal and not exceed areas from 2 up to 5 meters.

Compatibility according to EN 60118-4

In a „LOOP-SEGMENT“ system always two ILA-1000 work together which form a magnetic ﬁeld, thereby on the

entire area always the constant ﬁeld strength of the magnetic ﬁeld is reached.

The magnetic ﬁeld outside the intended area quite rapidly loses strength and drops to ZERO. This is done by coup-

ling a phase shifter FS-1, which is switched between the two ILA-1000, this in turn generates a signal phase diffe-

rence of 90 degrees in the electrical ﬂow by two adjacent induction loops.

LOOP SYSTEM WITH 90 DEGREES PHASE SHIFT according to EN 60118-4

14.

Phased Array System

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Instruction manual

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LOOP SYSTEM MIT 90 DEGREES PHASE SHIFT according to EN 60118-4

Example for an easy LOOP-SEGMENT induction loop system with two ILA-1000 (MASTER/SLAVE) and FS-1 90 de-

grees phase shift. It is important that the induction loops are approximately the same size.

ILA-1000 LOOP- AMP

ILA-1000LOOP- AMP

MASTER 0

SLAVE 90

System with single loops

System with multiple loops „COMB SYSTEM“

ILA-1000 LOOP- AMP

MASTER 0

SLAVE 90

MASTER 0

SLAVE 90

15.

Phased Array System

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Instruction manual

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LOOP SYSTEM WITH 90 DEGREES PHASE SHIFT according to EN 60118-4

Example for a multiple LOOP-SEGMENT induction loop system with (MASTER/SLAVE) conﬁguration, to cover very

large areas with constant magnetic ﬁeld strength.

Important information:

It is important that the induction loops MASTER and SLAVE are approximately the same size and have a width of of

about 50 - 66 % of the loop length.

System component:

4 x ILA-1000 induction loop ampliﬁer

2 x FS-1 90

phase shift

ILA-1000 LOOP- AMP

ILA-1000LOOP- AMP

MASTER 0

SLAVE 90

MASTER 0

IMPORTANT:

Rooms and areas, in which an induction loop is laid, should be marked accordingly.

16.

Phased Array System

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Instruction manual

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LOOP SYSTEM WITH 90 DEGREES PHASE SHIFT according to EN 60118-4

By the phase modulation the audio signal is shifted for 90

phases and transferred to the second ILA-1000 or to the

second induction loop.

Then the second ILA-1000 has to supply the second plumper induction loop in the whole inductive hearing system.

The ﬁrst LOOP ampliﬁer of the whole ring loop system works without phase shift with 0

The ﬁrst ILA-1000 supplies the ﬁrst plumper induction loop in the whole inductive hearing system.

In a „LOOP-SEGMENT“ system always two ILA-1000 work together which form a magnetic ﬁeld, thereby on the en-

tire area always the uniform ﬁeld strength of the magnetic ﬁeld is reached.

The magnetic ﬁeld outside the intended area quite rapidly loses strength and drops to ZERO.

This is done by coupling a phase shifter FS-1 which is switched between the two ILA-1000, which in turn causes a

signal phase difference of 90 degrees in the electrical ﬂow by two adjacent induction loops.

LOOP 0

LOOP 90

ILA-1000

MASTER

ILA-1000

SLAVE

FS-1

PHASE SHIFTER

AUDIO

INPUT

+/-15VDC

INSERT

INSERT „A“

INSERT „B“

17.

Phased Array System

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Instruction manual

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LOOP SYSTEM WITH 90 DEGREES PHASE SHIFT according to EN 60118-4

MASTER 0

SLAVE 90

FS-1 mains side

SIGNAL INPUT

18.

Phased Array System

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Instruction manual

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MATHEMATICAL CALCULATION OF THE INDUCTION LOOPS

Calculation of the induction loop type: double LOOP SEGMENT.

1.- At ﬁrst the room length is set (deducting 10-20 cm of the total lengths for other installations).

2.- Please set the favoured segment width (between 2 meters and 5 meter, depending on the ﬁeld loss).

3.- Now the coefﬁcient „X“ can be calculated.

„L“= room length

„S“= favoured segment width

From the chart, column „G“ please take the number which is next to the calculated value „X“.

The coefﬁcient values P 1 and P 2 indicate the numbers of segments for both loops.

Calculation of the segment width „A“

„L“= room length

„G“= number next to the calculated value „X“

Calculation of the distance between two segments „B“

Calculation of the shift between the two loops „C“

1,6

2.6

3.4

4.2

5.0

5.8

6.6

7.4

8.2

9.0

9.8

10.6

11.4

12.2

13.0

13.8

14.6

15.4

16.2

17.0

G P 1 P 2

19.

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Instruction manual

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Calculation example:

Room with the dimension 25 meter x 8.0 meter, the favoured segment width is set to 3.0 meter.

„X“ shall be calculated:

From the chart, column „G“ we take a value of 8,2

The coefﬁcient values P 1 and P 2 show:

P 1 =5

P 2 =5

„A“ shall be calculated:

Now the exact distance at the beginning of the two loop segments „B“/ „A“ shall be calculated:

Calculation of the shift between the two loops „C“

8,3

8,2

3,05

(meter)

1,6

3,05

4,88 (meter)

4,88

2,44

(meter)

2.6

3.4

4.2

5.0

5.8

6.6

7.4

8.2

9.0

9.8

10.6

11.4

12.2

13.0

13.8

14.6

15.4

16.2

17.0

G P 1 P 2

MATHEMATICAL CALCULATION OF THE INDUCTION LOOPS

20.

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Phoenix ILA-1000 User manual

Phoenix ILA-1000 User manual

Phoenix ILA-1000 User manual

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