For those who have a good appreciation of loop systems, the following is a
very quick guide to setting up the amplifier:
All you need is a power source, a signal source and a loop. See “Designing
Induction Loops” handbook or contact
Ampetronic
for advice.
Installation
1.
Turn all controls fully anti-clockwise.
2.
Connect loop cable of appropriate length / gauge.
3.
Connect signal input(s).
4.
Connect power
. See points 6 and 7 in
SAFETY
Section.
5. If rackmounted remove all rubber feet from units. DO NOT
re-fit the feet
fixing screws as this may cause damage and invalidate the warranty
.
Operation
6.
Switch ON - Check green POWER LED flashes during self test and
illuminates continuously when checks are completed.
7.
Apply input signal, and increase the input control until two green
COMPRESSION LEDs begin to light on the peaks of the signal.
8.
Adjust the LOOP
CURRENT
control until the CURRENT
LEDs illuminate
to achieve the desired peak current.
9.
Repeat step 6 for the other input if used.
10.
Listen to the magnetic field produced inside the loop area using a
receiving device (e.g
Ampetronic ILR3), or examine the performance in
more detail with a field strength meter
.
11.
Adjust MET
AL
LOSS CORRECTION to achieve a flat frequency
response.
OVER
VIEW
QUICK ST
ART
MIC and LINE:
Screwdriver adjustable controls which set the
level of signal fed into the compressor from Mic and Line inputs.
COMPRESSION:
Shows the amount of gain reduction in
decibels that is applied to the input signal(s).
LOOP CURRENT:
Screwdriver adjustable control which sets the
level of output current delivered into the loop.
CURRENT:
Indicates the peak current delivered into the loop.
LOOP MONITOR:
3.5mm jack socket for use with stereo
headphones to listen directly to the signal in the loop.
OVERLOAD, OVERHEAT, LOOP ERROR:
Warning LEDs, see
Troubleshooting
section for explanation and advice.
POWER:
LED to indicate AC power is applied to the unit.
I / O:
Power switch.
Rack ear fixing screws - A PH2 screwdriver is required.
AC POWER:
Standard 3-pole IEC320 connector containing
primary fuse for the unit.
LOOP OUTPUT:
2-pole high current connection to the loop cable.
METAL LOSS CORRECTION:
Screwdriver adjustable control
which compensates for the frequency dependent effects of metal.
SLAVE I/O:
Post compressor signal for use with ancillaries.
±15V 150mA DC OUTPUT:
3-pin power Mini DIN
LINE INPUT:
6.4mm Jack socket for balanced line level signals.
MIC INPUT:
XLR socket for use with balanced microphones.
GAIN BOOST:
Increases gain of MIC input by 15dB.
PHANTOM:
A15V phantom power to MIC input.
DC
INTRODUCTION
The ILD500 Induction Loop Driver has been designed as a high quality
amplifier for use with conference rooms, stadia, theatres, sports halls,
confidential rooms, lecture halls and cinemas. Depending on a number of
factors regarding the installation of the loop and set-up of the amplifier
, the
2
ILD500 can provide compliance with IEC601
18-4 for areas > 700m
.
E
as
e
of
in
sta
lla
tio
n
an
d
us
e
ha
ve
be
en
m
ajo
r fa
cto
rs
in
th
e
de
sig
n,
co
m
bin
ed
w
ith
op
tim
is
ed
pe
rfo
rm
an
ce
, a
nd
fre
ed
om
fro
m
R
.F
.I
ge
ne
ra
tio
n.
Th
e
IL
D
50
0
ha
s
tw
o
in
pu
ts
w
hic
h
all
ow
co
nn
ec
tio
n
to
a
sta
nd
ar
d
lin
e
le
ve
l s
ig
na
l a
nd
a
ba
la
nc
ed
m
ic
ro
ph
on
e.
Fo
r m
or
e
co
m
ple
x
in
sta
lla
tio
ns
, y
ou
m
ay
ne
ed
ad
dit
io
na
l a
nc
illa
ry
eq
uip
m
en
t s
uc
h
as
m
ic
ro
ph
on
e
pr
e-
am
pli
fie
r(s
),
ad
ap
to
r(s
) fo
r u
se
w
ith
10
0V
Lin
e,
or
sig
na
l p
ro
ce
ss
in
g
un
its
. S
ee
A
cc
es
so
rie
s
, o
r
co
nta
ct
A
m
pe
tro
nic
fo
r a
dv
ic
e.
OVER
LOAD
OVER
HEAT
POWER
CURRENT
2.8 3.6 4.5 5.7 7.1 9.0
A peak
LOOP
MONITOR
MIC
LINE
LOOP
CURRENT
COMPRESSION
6 12 18 24 30 36
dB
INDUCTION
LOOP DRIVER
ILD
500
LOOP
ERROR
1
2
3
A
C
P
O
W
E
R
LOOP OUTPUT
INDUCTION LOOP DRIVER ILD500
Designed and Engineered in the UK
INPUT 230V
45 - 65Hz
Power: 85W
Fuse: T 630mA L
SLAVE I/O
±15V 150mA
DC OUTPUT
LINE INPUT
MIC
METAL LOSS
CORRECTION
0
0.5
1.0
1.5
2.0
2.5
3.0
dB / Octave
G
ai
n
bo
os
t
P
ha
nt
om
Serial Nº
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION
SINGLE – TURN
LOOP ONLY
Loop resistance
Min:0.3
W
Max:2.0
W
For details consult
instructions or
www.ampetronic.com
Fuse Location
