Monacor PA-100ANC Mode D'emploi page 7

230 V~/50 Hz
➂
10
OFF ON
PHANTOM MIC
POWER INPUT GND
− 60 dB/BAL
➃
17 18 19
5 Connections
All connections should only be made by
skilled personnel and in any case with the PA
system and the amplifier switched off!
5.1 Audio connections
The audio connections are shown in fig . 1
on page 3 .
1) Use a balanced microphone cable to con-
nect the microphone, which is to pick up
the ambient noise, to the noise detector .
Depending on the existing plug on the
microphone cable, use the XLR jack (18)
or the 6 .3 mm jack (19) . Both jacks are
balanced .
If the microphone requires a phantom
power (20 V), set the switch PHANTOM
POWER (17) to the position ON . If not,
select the position OFF .
Caution! Only actuate the switch with
the amplifier switched off; the volume
of the wanted signal will be increased by
switching noise .
2) Connect the noise detector via the jack
PICKUP OUTPUT (21) to the jack PICKUP
INPUT (16) of the amplifier . For this pur-
pose, use a balanced XLR microphone
cable . (The noise detector will not oper-
ate when an unbalanced cable is used .)
The maximum cable length may be 500 m .
3) Feed the wanted signal to be controlled
by PA-100ANC to the jack INPUT (13) . The
signal can be supplied, for example, by
a PA preamplifier, e . g . PA-1414MX from
MONACOR .
4) The volume-controlled wanted signal is
present at the jack OUTPUT (12) . Connect
this jack to the input of a PA power am-
plifier .
5.2 Power supply and
emergency power supply
1) If the amplifier is to continue operation in
case of a mains failure, connect the termi-
nals DC POWER (11) to a 24 V emergency
power supply unit (e . g . PA-24ESP from
MONACOR) .
Note: If the 24 V voltage from the emergency
power supply unit is present at the terminals DC
POWER, the amplifier cannot be switched off with
24 V /0.15 A
OUTPUT
11 12
the POWER switch (9) . In case of a mains failure
PA-100ANC
or if it is switched off, it switches automatically
to the emergency power supply .
POWER PICKUP
2) Finally, connect the supplied mains cable
ON OUTPUT
+4 dB/600
to the mains jack (10) first and then to a
20 21
socket (230 V/ 50 Hz) .
6 Operation
1) Switch on the amplifier with the POWER
switch (9) . The yellow power LED (8) lights
up . If the noise detector is correctly con-
nected to the amplifier, the green indicat-
ing LED NOISE DETECTOR POWER (1) also
lights up .
2) Disengage the button "SIGNAL BYPASS"
(6) [position OUT] and on the PA power
amplifier, adjust the volume which is de-
sired for ambient noise of average volume .
In the position OUT, the wanted signal is
not controlled and the PA-100ANC may
be switched off, if required (e . g . in case of
a fault) . For further adjustments , engage
the button "SIGNAL BYPASS" .
3) First turn the control PICKUP LEVEL (2) to
the position MIN so that the volume of the
wanted signal is not increased by ambi-
ent noise . Set the switch REFERENCE (15)
to the position IN and adjust the desired
minimum volume with the control LEVEL
(14) . The volume will not fall below this
value even if no ambient noise exists . The
indicating LEDs PICKUP LEVEL (5) show the
maximum attenuation of the wanted signal
(−9 to −3 dB) or the minimum amplifica-
tion (3 to 18 dB) when the control PICKUP
LEVEL (2) is in the position MIN .
However, to reduce the wanted signal
to zero if no ambient noise exists, set the
switch REFERENCE to the position OUT .
Then the control LEVEL has no effect .
4) For the time being, turn the control PICKUP
LEVEL (2) to the position "0" and the con-
trol WIDTH (4) to the position "0 .5" (low-
est filter quality, maximum bandwidth) .
5) With the control FILTER (3), adjust the
frequency at which the volume will be
controlled by the ambient noise . The vol-
ume control is now indicated by the LEDs
PICKUP LEVEL (5) .
6) Now adjust the control PICKUP LEVEL (2)
so that the wanted signal can well be
heard even at the highest interfering noise .
If the overload indication CLIP (7)
should light up, the wanted signal is dis-
torted: The level of the wanted signal must
be reduced at the INPUT (13) (e . g . reduce
the output level on the PA preamplifier)
All rights reserved by MONACOR
may be reproduced in any form or by any means for any commercial use.
+3
0
+6
-3
-6
OUT
-9 dB +9
INPUT LEVEL REFERENCE
13 14
7) To optimize the volume control, the filter
8) Finally a fine adjustment should be made,
7 Specifications
Block diagram see page 17
Signal input: � � � � � � � � � � 1 × XLR, bal�
Signal output: � � � � � � � � � 1 × XLR, bal�
Microphone input: � � � � � � 1 × XLR, bal�
THD: � � � � � � � � � � � � � � � � < 0�3 %
Frequency range: � � � � � � � 20 – 20 000 Hz (−1 dB)
S / N ratio: � � � � � � � � � � � � > 60 dB
Measuring filter
Power supply
Ambient temperature: � � � 0 – 40 °C
Dimensions (W × H × D)
Total weight: � � � � � � � � � � 3�5 kg
Subject to technical modification .
® INTERNATIONAL GmbH & Co. KG. No part of this instruction manual
IN
PICKUP
INPUT
15 16
and the volume at the PA power amplifier
must be increased instead . However, the
control PICKUP LEVEL may also slightly be
turned back, if possible .
quality can be increased with the control
WIDTH . Thus, only a narrow frequency
range of the interfering noise is used for
control .
Frequency [control (3)]
Bandwidth of the
=
measuring filter
quality [control (4)]
alternately with the controls PICKUP
LEVEL, FILTER and WIDTH .
sensitivity: � � � � � � � � � � � 0�775 V
input impedance: � � � � � 30 kΩ
output level: � � � � � � � � � 0�775 V
output impedance: � � � � 200 Ω
1 × 6�3 mm jack, bal�
sensitivity: � � � � � � � � � � � 0�775 mV
phantom power: � � � � � � ⎓ 20 V
filter frequency: � � � � � � � 30 – 15 000 Hz
quality (Q): � � � � � � � � � � 0�5 – 3�5
mains voltage: � � � � � � � 230 V/ 50 Hz
power consumption: � � � 10 VA
emergency
power supply: � � � � � � � � ⎓ 24 V/ 150 mA
amplifier: � � � � � � � � � � � 482 × 44 × 230 mm,
1 RS (rack space)
noise detector: � � � � � � � 80 × 60 × 180 mm
7