PDA Range PDA200/2 User manual

PDA200/2, PDA500/2, PDA1000/2
INSTALLATION INSTRUCTIONS
This equipment must be installed by a suitably skilled and technically
competent person. Please read these instructions carefully before installation.
Important notes .......................................................................................... 2
What is an audio frequency induction loop system? .............................. 3
Familiarisation with your PDA Pro-Range induction loop amplifier ..... 4
Planning the system .................................................................................. 6
Overview of the ‘Outreach plate’ audio input extension system .......... 7
A typical PDA Pro-Range induction loop system .................................... 8
Installation ................................................................................................... 11
Safety precautions ..................................................................................... 11
Mounting the amplifier .............................................................................. 11
Connecting and testing the system ......................................................... 12
Technical specification .............................................................................. 14
Spares and accessories .............................................................................. 16
PROFESSIONAL AUDIO-FREQUENCY
INDUCTION LOOP AMPLIFIERS
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PDA Pro-Range Instructions • Approved Doc. No. DCP0003168 Rev 3 • Page 16
© Errors and omissions excepted. The manufacturer of this equipment operates a policy of continuous improvement and
reserves the right to alter product specifications at its discretion and without prior notice.
PDA PRO-RANGE AMPLIFIERS AND MOUNTING KITS
PDA200/2 200m2free-standing professional induction loop amplifier
PDA500/2 500m2free-standing professional induction loop amplifier
PDA1000/2 900m2free-standing professional induction loop amplifier
PDA/WM Wall mounting kit for PDA200/2, 500/2 or 1000/2 amplifier
PDA/RM 19"Rack mounting kit for PDA200/2, 500/2 or 1000/2 amplifier
INDUCTION LOOP CABLE - see page 6 for further information
LOOP1/B 100m reel 0.5mm2single core black loop cable
LOOP1/W 100m reel 0.5mm2single core white loop cable
LOOP2/B 100m reel 1.0mm2single core black loop cable
LOOP2/W 100m reel 1.0mm2single core white loop cable
LOOP3/B 100m reel 1.5mm2single core black loop cable
LOOP3/W 100m reel 1.5mm2single core white loop cable
LOOP4/B 100m reel 2.5mm2single core black loop cable
LOOP4/W 100m reel 2.5mm2single core white loop cable
FLAT1005 100m x 0.5mm2insulated copper tape (flat loop cable for under carpets)
FLAT2005 100m x 1.0 mm2insulated copper tape (flat loop cable for under carpets)
FLAT3005 100m x 1.5mm2insulated copper tape (flat loop cable for under carpets)
TAPE 50m white synthetic fibre tape (used to protect flat loop cable)
OUTREACH PLATES - see page 7 for further information
APM Omni-directional plated microphone, for wall/ceiling/desk mounting
APL Double phono line level outreach plate
APJ 3.5mm mono jack mic. level outreach plate
APQM 6.35mm jack mic. level outreach plate
APQL 6.35mm jack line level outreach plate
APXM XLR 3 pin mic level outreach plate
APXL XLR 3 pin line level outreach plate
API AFILS active indicator light
BELDEN/10 10m Belden 8723 four core screened cable for use with outreach plates
BELDEN/25 25m Belden 8723 four core screened cable for use with outreach plates
INDUCTION LOOP TESTING EQUIPMENT - see page 13 for further information
SWGN Sine wave generator
(requires PP3 battery and AL3 connection lead)
AHHM FoSmeter magnetic field strength meter
(requires PP3 battery)
AMSW FoSmeter Plus combined sine wave generator & magnetic field strength meter
(requires PP3 battery and AL3 connection lead)
AHHM/H FoSmeter H combined magnetic field strength meter & loop listener
(requires HEAD1 32 Ohm headphones)
HEAD1 32 Ohm headphones for use with AHHM/H
AL3 3.5mm jack to bare ended lead
(connects PNGN or AMPN to a pro-range amplifier’s outreach socket)
INDUCTION LOOP ANCILLARIES
APT Loop connector plate (for the termination of induction loop cable)
LEST 100V line (i.e PA system output) to 0db (775mV line level) convertor
TEAR10 Pack of 10 self-adhesive ‘induction loop in use’ stickers
Spares and accessories
PDA Pro-Range Instructions • Approved Doc. No. DCP0003168 Rev 3 • Page 1

PDA Pro-Range Instructions • Approved Doc. No. DCP0003168 Rev 3 • Page 2
Important notes
These instructions are general and cannot be considered to cover every aspect of
audio-frequency induction loop system design and installation.
We recommend you read BS7594 (The Code of Practice for Audio-Frequency Induction
Loop Systems) and EN60118-4 (Magnetic field strength in audio frequency induction loop
systems for hearing aid purposes), copies of which are available from the British Standards
Institute, Customer Services Department, 389 Chiswick High Road, London W4 4AL.
Tel: [phone]. Web: www.bsi-global.com. It should be noted that all of the
above documents can be subject to update or revision at any time and we recommend you
check the status of them with the British Standards Institute before designing or installing
the system.
Other National standards of design, installation and commissioning should be referenced
where pertinent.
No responsibility can be accepted by the manufacturer or distributors of this equipment for
any misinterpretation of an instruction or guidance note or for the compliance of the
system as a whole.
This induction loop amplifier MUST be installed and maintained by a suitably skilled and
technically competent person.
This document must not be left accessible to the user.
Equipment guarantee
This equipment is not guaranteed unless the system is installed and commissioned in
accordance with National standards by an approved and competent person or organisation.
IMPORTANT : THE INDUCTION LOOP AMPLIFIER SHOULD NEVER
BE OPERATED WITHOUT A LOOP CONNECTED TO IT.
This product has been manufactured in conformance with the requirements of
all applicable EU directives.
Compressor: Gives dynamically variable compression ratio from 1:1 (no compression) to 17:1 when both
compression LEDs are lit. In normal use, with the first compression LED lit for part of the time, the
compressor has a “soft knee” characteristic and provides a small degree of compression for signals which
only just light the first LED but a large degree of compression for louder peaks.
Attack time: Approx. 10mS. Release time: Approx. 2.2S
Metal Compensation: True 3dB /octave design counteracts frequency dependent absorption by metal in
the proximity of the installation over a bandwidth of approximately 100Hz – 10KHz.
INDICATORS
Power on LED: Green
Loop current: A five LED bar graph type meter is provided to allow monitoring of loop current output and
assist in setting up the amplifier. This is provided by monitoring true output current rather than from a line
level derived signal. The calibration is as follows:
PDA200/2: 1st led = 75mA 2nd led = 375mA 3rd led = 1.5A 4th led = 3.75A 5th led = 6A
PDA500/2: 1st led = 112mA 2nd led = 562mA 3rd led = 2.25A 4th led = 5.6A 5th led = 9A
PDA1000/2: 1st led = 150mA 2nd led = 750mA 3rd led = 3A 4th led = 7.5A 5th led = 12A
Accuracy - +-10%
Compression: A two LED display is provided for indication of signal compression. The first LED shows the
beginning of compression whilst the second indicates very high compression levels have been reached.
REAR PANEL CONTROLS
On/Off switch incorporated into IEC mains inlet.
Four way piano key style DIP switch selects Phantom power for mic 1 & 2 XLR inputs and switches XLR input
1 between Line and Microphone settings. The fourth of the 4-in-line switch is not connected.
FRONT PANEL CONTROLS
Level controls for XLR 1 (Line/Mic switchable), XLR 2 (Mic) and Outreach.
These can be used individually or any of them together, in which case they act as a three input mixer.
Drive control: Sets level of amplifier output current supplied by the amplifier. Analogous to the volume
control on a standard voltage output amplifier but NOT designed to be adjusted once set to the correct
value for any given installation.
Metal compensation control. When fully anti-clockwise has no effect on the signal. When turned clockwise
imparts a rising 3dB/octave characteristic to the frequency response of the amp. This tends to counteract the
effect of metal in proximity to the loop. Where there is some distance between the loop and any metal, or
the quantity of metal is small, an intermediate setting of the control should be found which provides a
satisfactory tonal balance.
COOLING REQUIREMENTS
The PDA1000/2 and PDA500/2 have thermostatically controlled cooling fans, which are activated when the
amplifier’s internal heatsink temperature reaches approximately 56
o
C. It is therefore normal for the fans to
be heard switching on and off in everyday use.
The PDA200/2 model does not require a cooling fan, as it does not generate as much heat as the larger models.
In all cases the amplifiers should be operated in a cool environment, away from sources of heat and should
never be covered with any object that could impede the flow of cooling air.
DIMENSIONS & WEIGHT
All models: Length – 380mm; Depth – 220mm; Height – 80mm
Weight: PDA200/2 – 3.74Kg, PDA500/2 – 3.46Kg; PDA1000/2 – 4.54Kg
PDA Pro-Range Instructions • Approved Doc. No. DCP0003168 Rev 3 • Page 15

PDA Pro-Range Instructions • Approved Doc. No. DCP0003168 Rev 3 • Page 3
An audio-frequency induction loop system (AFILS) allows hearing impaired
people to hear more clearly.
Most hearing aids have a ‘T’ or ‘MT’ switch which allows them to pick up the
electromagnetic field generated by an induction loop system. The hearing aid
converts this signal into a sound suited to its user’s specific hearing requirements.
Any hearing impaired person positioned within or near the loop can hear the loop signal by
switching their hearing aid to the correct position, allowing them to participate more effectively
in general conversation, ordering goods or services, listening to public performances, etc.
An induction loop system therefore comprises four main elements:-
The audio source – typically a microphone, television or radio (or a combination of these).
The induction loop amplifier
The loop – typically a single turn of wire usually run around the perimeter of the room.
The receiver(s) – any hearing aid with a ‘T’ or ‘MT’ switch.
What is an audio frequency induction loop system?
In addition to having a mic. and a mic./line input (which allows the
above system configuration to be easily implemented), all PDA
Pro-Range amplifiers also have an ‘Outreach’ socket. This socket
offers full compatibility with our unique Outreach plate audio input
extension system and allows the connection of multiple microphone
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and/or line level inputs via a range of specially designed single gang connector plates.
For further details please refer to page 7.
Television
Amplifier
Loop
Microphone
Hearing aid in the
‘T’ or ‘MT’ position
Signal cable
Signal cable
PDA Pro-Range Instructions • Approved Doc. No. DCP0003168 Rev 3 • Page 14
PDA Pro-Range technical specifications
POWER
230-240 V a.c. mains (PDA200/2 <150 VA; PDA500/2 <225 VA; PDA1000/2 <300 VA)
(IEC 320 fused mains lead supplied)
INPUTS
Line (3 pin XLR type)
Input impedance: 6k8 + or – input to ground.
Sensitivity: 200mV – 2.5V RMS balanced or unbalanced.
Microphones (3 pin XLR type)
Input impedance: 6k8 + or – input to ground.
Sensitivity: 1 – 8 mV balanced
Phantom power: 12V switchable (on/off)
Outreach (Four-way Weidmuller connector. Plug type BL5. 08/4)
Input impedance: >10k
Sensitivity: 500mV - 6V RMS balanced
Outreach Power: 16 – 21 V d.c. is available via the amplifier’s Outreach Socket. A self-resetting fuse
protects this output from any accidental overload.
OUTPUT
Type: Current mode.
Loop connector: Four way binding posts
Recommended loop impedance: 0.5 – 1 Ohm @ 1KHz. Will drive higher impedance loops with reduced
area of coverage.
Loop drive current @ 1 Ohm: PDA200/2 – 6A; PDA500/2 – 9A; PDA1000/2 – 12A.
Peak loop drive current (measured over 5mS integration time):
PDA200/2 - 8 Amps @ 1 Ohm, 13Amps @ 0.5 Ohm;
PDA500/2 – 12 Amps @ 1 Ohm, 19 Amps @ 0.5 Ohm;
PDA1000/2 – 14 Amps @ 1 Ohm, 24 Amps @ 0.5 Ohm
Recommended cable gauge: See graph on page 6.
Headphones: 3.5mm jack socket allows monitoring of the loop signal via >32 Ohm headphones.
COVERAGE
The table below gives the maximum area coverage for a 400mA/M field strength +/- 1dB.
PERFORMANCE
Frequency response: 20Hz – 14 KHz + - 3dB
Distortion: Less than 0.5 %
Signal to noise ratio: Better than –65dB any input
Pro-Range
model no.
200/2
500/2
1000/2
Max. short term
current
6A
9A
12A
Square
200m
2
500m
2
900m
2
Rectangular (2:1 aspect ratio)
240m
2
600m
2
1100m
2
Area of coverage
M
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PDA Pro-Range Instructions • Approved Doc. No. DCP0003168 Rev 3 • Page 4
INPUT MODE SELECT SWITCH
Allows the MIC./LINE input to be configured for
Mic or Line operation and for optional 11V phantom
power to be switched to the inputs.
SW1
1
2
3
4
Familiarisation with your Pro-Range induction loop amplifier
MIC. INPUT
Accepts standard three-pin male XLR
type connectors. Optional 11V
phantom power is available via input
mode select switch 2.
MIC./LINE INPUT
Accepts standard three-pin male XLR type
connectors. Can be configured for Mic. or Line
operation via input mode select switch 3.
Optional 11V phantom power is available via
input mode select switch 1.
OUTREACH INPUT
Allows the connection
of up to ten additional
microphone or line
level inputs via a range
of specially designed
single gang connector
plates (see page 7 for
further details).
POWER
SWITCH
INDUCTION LOOP
CONNECTORS
230V AC
POWER LEAD
CONNECTOR
Below and overleaf is an overview of the indicators, controls and connectors available on
your PDA Pro-Range induction loop amplifier. Detailed connection diagrams, system
planning and system set-up information can be found later in this manual.
COOLING FAN
Provided on PDA1000/2
& PDA500/2 models only
Operates automatically
when the temperature of
the amplifier’s internal
heat sink reaches 56
o
C.
It is perfectly normal for
this fan to switch on and
off during everyday use.
MAINS FUSE
All models feature an IEC
(EN60127 part 2) compliant
mains fuse, as detailed below:
PDA200/2
2A T 20mm anti-surge
ceramic HRC type.
PDA500/2
3.15A T 20mm anti-surge
ceramic HRC type.
PDA1000/2
5A T 20mm anti-surge
ceramic HRC type.
Do not use any other type or
size of fuse other than those
shown above.
OFF (up)
11V phantom off
11V phantom off
Line operation
ON (down)
11V phantom on
11V phantom on
Mic. operation
Input
MIC./LINE
MIC.
MIC./LINE
----------------- Switch 4 has no function -----------------
Note that if Switch 3 is in the OFF (up) position (MIC./LINE
input set for Line operation), Switch 1 MUST also be in the
OFF (up) position (11V phantom power off). Failure to do
so could result in damage to any equipment you
connect to the amplifier.
PDA Pro-Range Instructions • Approved Doc. No. DCP0003168 Rev 3 • Page 13
For compliance with BS7594 (the code of practice for audio-frequency induction loop
systems), we recommend you also check the system using a pink noise generator and
magnetic field strength meter.
BS7594 recommends that the magnetic field strength of an AFILS over a covered area should
be 100mA RMS average peaking to 400mA per metre. The most efficient way of ensuring this
requirement is met is to measure the magnetic field strength of a steady output from the
induction loop amplifier.
Unlike music or speech (both of which provide a variable sound output from which it is
virtually impossible to obtain an accurate RMS reading), pink noise has an equal and
constant average amount of energy content per octave of bandwidth. When fed into
an AFILS system, pink noise therefore gives a constant magnetic field strength which
can be easily and accurately measured using a magnetic field strength meter.
The following items of cost-effective PDA RANGE test equipment can be used to verify
both the audio quality and the magnetic field strength of any AFILS system. ALWAYS
refer to the more detailed information supplied with each unit before starting any
tests.
!SWGN Sine wave generator
!AHHM/H FoSmeter H Combined magnetic field strength meter & loop listener
!AMSW FoSmeter+ Combined sine wave generator & magnetic field strength meter
!HEAD1 Headphones for use with FosMeter H
Contact your PDA RANGE distributor/supplier for pricing details.
Metal Compensation Control
If a large amount of metal is present in or near the induction loop, you may
find the sound you hear through the loop listening device is ‘woolly’ or ‘dull’.
This is caused by the metal in the room absorbing the magnetic field at a rate that
increases with frequency, i.e. high notes are absorbed more than low notes resulting in
a ‘muffled’ sound. If this is a problem, try turning the amplifier’s
METAL COMPENSATION
control clockwise in small increments until a natural balance is achieved. Please note
however that due to the metal absorbing power from the amplifier, its area of
coverage will be reduced and further reduced as the METAL COMPENSATION control is
turned clockwise.
Note that when testing the installation with a loop listening device, you may
hear a slight ‘humming’ noise in the background. This IS NOT a fault with the
induction loop system but a common occurrence caused by mains wiring. This
hum will normally NOT be heard by hearing aid users as most modern hearing aids
have filters which cancel this noise out.
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PDA Pro-Range Instructions • Approved Doc. No. DCP0003168 Rev 3 • Page 5
COMPRESSION INDICATORS
Give a visual indication of the amplifier’s compressor activity.
Installers should refer to these indicators when using the
amplifier’s input signal level controls.
For best results, we recommend you set the inputs so that
the LOW compression indicator is lit most of the time and
the HIGH compressor indicator illuminates only with peaks in
the input signal.
LOOP STRENGTH (DRIVE) METER
Gives a visual indication of the current being driven into the
induction loop. In normal circumstances, the far right red LED
should only illuminate with peaks in the input signal.
Installers should refer to these indicators when using the
amplifier’s loop drive control.
LOOP DRIVE CONTROL
Used to adjust the strength of the magnetic field generated by the induction
loop. Turn clockwise to increase the amount of electrical current that is
being driven into the induction loop or anti-clockwise to decrease it.
Always refer to the amplifier’s loop strength meter when adjusting this control.
POWER ON INDICATOR
Illuminates green when the amplifier is powered up.
METAL COMPENSATION CONTROL
Used to help combat the frequency response problems associated with appli-
cations where there is excessive metal ‘absorbing’ the magnetic field. See
page 13 for further details.
MODEL
NUMBER
Indicates the
model number
of the amplifier.
Variants include
the PDA200/2
(for areas up to
200m
2
), the
PDA500/2 (for
areas up to
500m
2
) and the
PDA1000/2 (for
areas up to
900m
2
).
3.5mm LOOP OUTPUT MONITORING SOCKET
Allows the loop current/audio signal that is present in the induction loop to
be monitored using a pair of 32 Ohm headphones. Note that the sound you
hear will be a true representation of the signal running through the loop
and NOT a representation of what hearing aid users will hear after factors
such as metal absorption and their position in the room are taken into
account. You MUST still assess the loop signal in the covered area as
described in connecting and testing the system, pages 10-13.
INPUT SIGNAL LEVEL CONTROLS
Can be used to adjust the sensitivity of
the three input signals (MIC., MIC./LINE
and OUTREACH).
Turn clockwise to increase sensitivity or
anti-clockwise to decrease sensitivity.
For optimum performance, always refer
to the amplifier’s COMPRESSION
indicators when adjusting these controls
(see right).
Depending on the number of inputs
connected to the amplifier, these
controls can also operate as a simple
mixer with any changes having a
cumulative affect on the output signal.
PDA Pro-Range Instructions • Approved Doc. No. DCP0003168 Rev 3 • Page 12
8
9
7
1 0
The loop strength meter’s red peak indicator (the fifth LED on the gauge) should
only illuminate with peaks in the input signal - if it is lit too frequently, the audio
sound quality will be distorted and the amplifier may overheat. If this is the case,
try adjusting the layout of the loop and/or consider purchasing a more powerful PDA range
amplifier.
If it is impossible to illuminate all of the indicators on the loop strength
meter even when the DRIVE control is turned fully clockwise, the thickness
(CSA) of the induction loop cable used may be insufficient for the job.
Please refer to Loop cable selection, page 6, to ensure you are using the
recommended cable for the application.
6Ensure the amplifier’s
DRIVE, METAL COMPENSATION and
three LEVEL controls are set to minimum by turning them
fully anti-clockwise.
Connect the AC power lead (supplied) to a 230V a.c.
wall socket and the amplifier‘s 230V socket as
shown, flick the rocker switch to the on (I) position
and ensure the amplifier’s green POWER indicator is
lit.
With all relevant audio input source(s) active,
increase the appropriate LEVEL controls until the
LOW compression indicator is lit most of the time
and the HIGH compression indicator illuminates
with peaks in the input signal(s).
Note that it is perfectly acceptable for the HIGH indicator to be lit two thirds of the
time but not for them to be permanently lit.
TIP: If you are using the mic., mic./line and outreach input at the same time, adjust the
level control on each outreach plate to achieve an acceptable balance.
Adjust the DRIVE control by turning it
clockwise until the first three lights on the
amplifier’s loop strength meter start to
illuminate.
Using an induction loop listening device, listen to the loop signal
in the centre of the loop. If the signal level is not acceptable,
adjust the DRIVE control in small increments until it is.
When you are satisfied with the signal in the centre of the
loop, move around the room to ensure coverage is consistent
throughout.
Pay particular attention to areas where hearing aid users are
likely to gather and take note of the following warning and
advice tips:-
COMP R E SS ION
LOWHIGH
COMP R E SS ION
LOWHIGH
D R IVE
POW
E R
continued on page 13

PDA Pro-Range Instructions • Approved Doc. No. DCP0003168 Rev 3 • Page 6
Loop cable selection
Almost any single core tri-rated
cable can be used for the
induction loop provided it is of
the appropriate DC resistance
(ideally 0.5 to 1 Ohm).
The graph on the right shows the
recommended CSA for different
lengths of loop cable. Simply
work out the length of the loop
required and choose a cable size
that falls into the non-shaded
area of the graph.
50
100
150
200
25
75
125
175
0 . 5 1 1 . 5 2 2 . 5 3 3 . 5 4 4 . 5 5
250
300
2
0
0
Planning the system
Induction loop system design and installation can be simple provided a few basic facts are
understood. To help avoid poor performance and the need to re-position the amplifier or
loop cable at a later stage, please read pages 6 to 9 before proceeding.
Area of coverage
Maximum square room coverage provided by PDA Pro-Range amplifers is as follows:-
PDA200/2 = 200m
2
(14m x 14m) ; PDA500/2 = 500m
2
(22m x 22m) ; PDA1000/2 = 900m
2
(30m x 30m)
For rectangular (2:1) asect ratio coverage see technical specifications, page 14/15.
Note that the system may not have to cover the whole of a room. For example, churches may only
require coverage in the pews. Seek advice from the relevant authorities before installation begins.
Loop cable position
The field strength in the plane of the loop (the height at which the cable is positioned)
varies greatly so it is best to install the loop above or below the listener at floor or ceiling
height (2.5m max.) - the loop field will not be as strong but it will be much more even and give
better results for the user(s). Note that listening height (with the hearing aid user sitting or
standing) is normally 0.9 to 1.8m from the floor.
With floor loops, avoid running the loop up and over door openings as the signal strength in
the doorway will be excessively strong and may cause discomfort to the users.
Large amounts of metal can affect the strength of the loop field so avoid running loops along
girders or under floor mesh. If unavoidable, the amplifier’s metal compensation control can help
combat the frequency response problems associated with such installations, but overall current
capability may be reduced, see page 13 for details.
Trial loops
Always run a trial loop and evaluate performance by listening to the signal with a hearing aid or
a dedicated loop test receiver. For compliance with BS7594, we recommend you also test the
system using a pink noise generator and magnetic field strength meter, as described on page 13.
Overspill and ‘cross-talk’
The signal generated by the loop will radiate outside as well as inside the loop. If there are
other loop systems in close proximity, overspill such as this may lead to ‘cross-talk’ (signals
from different loops merging into one). If this is likely to be an issue, special designs of loop
can be implemented to help reduce the overspill field - contact your supplier for details.
For example, to cover a room 30m x 20m
(600m2) the loop cable would need to be 100m long (2 sides @ 30m and 2 sides @ 20m). The
recommended cable CSA for a loop this length is between 2mm2and 4mm2. Therefore, a
PDA1000/2 (which can cover areas up to 900m2) using 2.5mm2cable would be sufficient.
0.5 Ohm
1 Ohm
RISK OF DISTORTION OR
REDUCED AREA OF COVERAGE
RISK OF OVERHEATING
OKAY
Cable CSA (mm
2
)
Cable Length (in metres)
PDA Pro-Range Instructions • Approved Doc. No. DCP0003168 Rev 3 • Page 11
SW1
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4
Connecting and testing the system
Install the loop - see Planning the System, pages 6 to 9, for example layouts and
positioning advice.
Before connecting the loop to the amplifier, use a multimeter to check the loop is not
shorted to ground at any point. It WILL almost certainly damage the amplifier if it is.
Connect the loop to the amplifier’s heavy duty binding posts
using bare wire ends, 4mm plugs or spade terminals as appropriate.
Connect an input signal source (microphone, line, outreach or any combination of
these) to the amplifier as shown below.
1
2
3
4
IMPORTANT : DO NOT POWER UP THE SYSTEM UNTIL STEP 7 (OVERLEAF).
THE AMPLIFIER SHOULD NOT BE OPERATED WITHOUT A LOOP CONNECTED TO IT.
3 pin XLR connectors
Ensure pin arrangements
match those shown above.
Microphone
4-way Outreach connector
For more detailed information on
Outreach plate wiring see page 7.
Set the Input Mode Select Switches to their correct positions with reference to the
table below. Note that the position of the switches will depend upon the type of
inputs that are connected to the amplifier.
5
Line level input, i.e. CD play
Gnd
Au+
Au–
Microphone
DO NOT
connect the
Mains lead
until point 7
overleaf
OR
OFF (up)
11V phantom power off
11V phantom power off
Line operation
ON (down)
11V phantom power on
11V phantom power on
Mic. operation
------------------------- Switch 4 has no function -------------------------
Note that if Switch 3 is in the OFF (up) position ( MIC./LINE input set for line operation),
Switch 1 MUST also be in the OFF (up) position (11V phantom power off). Failure to do
so could result in damage to any line level equipment you connect to the amplifier.
Input
MIC./LINE
MIC.
MIC./LINE

PDA Pro-Range Instructions • Approved Doc. No. DCP0003168 Rev 3 • Page 7
In addition to the amplifier’s two XLR inputs ( MIC. and MIC./LINE ), up to 10 additional
microphone or line level inputs (any mix) can be daisychained to the amplifier’s ‘ OUTREACH ’
connector via a range of specially designed wall, ceiling or desk mountable single gang plates.
Several different Outreach plates are available covering the most common variants of audio
connector (see below) and cable lengths of up to 100m (total network length) are easily achieveable
using standard two pair audio cable such as Belden 8723. See typical wiring diagram below.
The ‘Outreach’ plate audio input extension system
APM OMNI-DIRECTIONAL PLATED MIC
A self-contained omni-directional
electret microphone complete with
onboard mic to line level converter.
Typical coverage up to 25m
2
when
located at a ceiling height of 2.5-3m.
APL DUAL PHONO LINE LEVEL PLATE
Accepts dual phono line-level signals
(usually from a stereo source such as a
TV). Includes an on-board dual phono
to mono converter. (An APS SCART to
dual phono lead is also available to
facilitate the connection of TVs, etc).
APJ 3.5mm MICROPHONE JACK PLATE
Accepts unbalanced electret
microphones with 3.5mm mono jack
plugs. Includes an onboard mic to line
level converter, high gain pre-amplifier
and 8V phantom power.
APQM 6.35mm (1/4”) MICROPHONE JACK PLATE
Accepts balanced or unbalanced
electret microphones with 6.35mm
(1/4”) jack plugs. Includes an on-board
mic to line level converter, high gain
pre-amplifier and 8V phantom power.
APXM XLR 3 PIN MICROPHONE PLATE
Accepts balanced or unbalanced
microphones with standard 3 pin XLR
connectors. Includes an on-board mic
to line level converter, high gain pre-
amplifier and 8V phantom power.
APXL XLR 3 PIN LINE LEVELPLATE
Accepts standard 3 pin XLR feeds from
audio equipment such as stage or
church mixing desks, etc.
APQL 6.35mm (1/4”) LINE LEVEL PLATE
Accepts 6.35mm (1/4”) jack feeds from
audio equipment such as stage or
church mixing desks, etc.
API ‘AFILS ACTIVE’ PLATE
Includes two ultra-bright LEDs in a
translucent diffuser overprinted with
the induction loop ‘ear’ symbol. The
LEDs illuminate when the Outreach
network is powered to indicate that an
AFILS system is installed.
Outreach plate variants
Mountable on 25mm surface back boxes, Outreach plates can be located at any convenient
point on an installation, overcoming the need for excessively long microphone or audio leads.
to next
outreach
plate
(optional)
AMPLIFIER
OUTREACH
CONNECTOR
APL DUAL PHONO
LINE LEVEL PLATE
APM OMNI-DIRECTIONAL
PLATED MICROPHONE
A OUT +
A OUT –
A IN +
A IN –
The four-way Outreach connector is included in the
amplifier’s accessory pack. Connect the Outreach network
to the connector’s screw terminals as shown before
plugging it into the amplifier’s ‘
OUTREACH ’ socket.
V+
GRND
A OUT +
A OUT –
A IN +
A IN –
V+
GRND
Audio Source, such
as a TV connected
to the APL using
an APS scart lead
A +
A -
V +
Gnd
WIRING TIP:
OUT always
goes to IN!
PDA Pro-Range Instructions • Approved Doc. No. DCP0003168 Rev 3 • Page 10
Safety precautions
Ensure the amplifier IS NOT located in areas with high ambient temperatures or high levels
of humidity, moisture or dust. It SHOULD NOT be exposed to direct sunlight or water nor be
placed next to vibrating or heat-generating equipment.
The amplifier should never be covered with any object that could impede the flow of air to
its cooling fan and we recommend there is a gap of at least 50mm (2 inches) to the rear and
sides of the amplifier.
DO NOT dismantle or attempt to modify the amplifier in any way. No user-serviceable fuses or
parts are included inside the amplifier. For repair, consult your distributor/supplier.
Ensure the a.c. power lead, loop cable and all relevant audio/microphone lead(s) are fixed
securely into position before operation. Do not leave any trailing leads.
The a.c. power lead has a moulded plug. If you need to remove the plug, it must be replaced
with one that meets BS1363, or equivalent, fitted with a 3A fuse. As the colours of the wires
in the lead may not correspond to the markings in your plug, connect as follows:-
Green and yellow wire to ‘E’ mark, ‘ ‘ mark, ‘Green’ mark or ‘Green and Yellow’ mark
Blue wire to ‘N’ mark, ‘Black’ mark or ‘Blue’ mark
Brown wire to ‘L’ mark, ‘Red’ mark or ‘Brown’ mark
Please refer to the safety precautions below before attempting
to make any connections or operating your PDA Pro-Range
induction loop amplifier.
Mounting the amplifier
The amplifier has been designed so it can be left free-standing on a shelf, tabletop or desk,
or, alternatively, wall or rack mounted using one of our optional PDA/RM 19” rack mounting
kits or PDA/WM wall-mounting kits.
Always refer to the Safety precautions (above) before deciding on a location for the
amplifier and note that more detailed information on wall or rack mounting is supplied
with each optional mounting kit.
Installation

PDA Pro-Range Instructions • Approved Doc. No. DCP0003168 Rev 3 • Page 8
Induction loop amplifier (1)
Designed to be free-standing or, if required, wall or rack
mounted using our optional PDA/WM or PDA/RM kits.
Loop cable (4)
Run the loop cable (see page 6 for recommended
cable types) around the perimeter of the room at
floor or ceiling height. Note that ceiling loops will
not be practical in all applications, i.e. churches with
high roofs.
If installing a floor loop, ensure the loop cable is
adequately fixed and protected against being crushed
in walkways or by furniture.
Note that flat copper foil loop tape is also available
from your distributor.
AMP professional microphone (3)
connected directly to the
amplifier’s MIC. input using an
appropriate lead
Positioned so it picks up the sound
generated by the church organ
‘Induction loop in use’ sticker
Put the ‘induction loop in use’ sticker
(supplied with the amplifier) where it
can be clearly seen by members of the
public. For large applications with
multiple entrances, additional stickers can be
purchased from your distributor.
CD player (2) connected directly
to the amplifier’s MIC./LINE input
using an appropriate lead
The illustration below shows a typical induction loop system for a place of worship requiring
multiple audio inputs. It is designed to show all of the amplifier’s inputs being used with a
microphone connected to its MIC. input, a CD player connected to its MIC./LINE input and a
series of Outreach plates connected to its OUTREACH socket. It should be noted that this
diagram is provided for illustration purposes only and that in practice the same system (or a
similar system for a different application) could just as easily be achieved using a different
layout and/or a different configuration of inputs.
A typical Pro-Range multiple input induction loop system
14
4
PDA Pro-Range Instructions • Approved Doc. No. DCP0003168 Rev 3 • Page 9
AML lectern microphone (12) connected to the
amplifier via an APJ Outreach plate (13)
Hanging ambient microphone (14) connected to the
amplifier via an APXM Outreach plate (15)
Positioned over the congregation to help convey ambient noise
and pick up the singing of hymns, etc.
Outreach network (11)
Daisychain standard two pair audio
cable such as Belden 8723 to all
Outreach plates as appropriate.
Note that a maximum of 10
outreach plates (any mix) can be
connected to the Outreach network
and that the network must not
exceed 100m (total network length).
AMR/L radio microphone (5),
transmitter (6) and receiver (7)
connected to the amplifier via an
APQM (8) outreach plate.
Existing mixer (9) for bands, etc.,
connected to the amplifier via
an APXL outreach plate (10).
5
6
9
10
11
12
13
2
3
8
1
7
15