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PA-100ANC
➁
Ambient Noise Controller
These instructions are intended for installers
with specific knowledge in 100 V technology
for PA applications . Please read the instruc-
tions carefully prior to installation and keep
230 V~/50 Hz
them for later reference .
10
1 Overview
1.1 Amplifier
1 Indicating LED NOISE DETECTOR POWER:
OFF ON
PHANTOM
MIC
lights up when the amplifier is switched
POWER
INPUT
−60 dB/BAL
on and the noise detector is connected
17 18
19
2 Control PICKUP LEVEL for adjusting the
interfering signal level (ambient noise)
which controls the volume of the wanted
signal
The further the control is turned up, the
higher the volume increase .
3 Control FILTER for adjusting the frequency
of the measuring filter which filters the
interfering signal
4 Control WIDTH for adjusting the quality
and thus the bandwidth of the measuring
filter:
low quality = wide bandwidth
high quality = narrow bandwidth
5 Indicating LEDs for the volume modifica-
tion of the wanted signal
6 Button "Signal Bypass"
button pressed: The wanted signal is vol-
ume-controlled by the amplifier .
not pressed: The wanted signal does not
pass through the amplifier; the amplifier
is bridged .
7 Overload LED CLIP: lights up when the
wanted signal is distorted
8 Power LED
9 POWER switch
Note: If a 24 V voltage from an emergency
power supply unit is present at the terminals DC
POWER (11), the amplifier cannot be switched
off .
10 Mains jack for connection to a socket
(230 V/ 50 Hz) via the supplied mains cable
11 Terminals DC POWER for a 24 V emer-
gency power supply unit
12 Jack OUTPUT for connection to the signal
input of a PA power amplifier
The volume-controlled wanted signal is
present at the jack .
13 INPUT jack for the wanted signal to be
volume-controlled
14 Control LEVEL to limit the maximum vol-
ume attenuation of the wanted signal
6
170
2.5
95
800
50
1.5
1.2k
NOISE DETECTOR
POWER
40
3k
MIN
MAX
30 Hz
15 k
0.5 Q
PICKUP LEVEL
FILTER
WIDTH
1
2
3
4
15 Switch REFERENCE
IN
24 V /0.15 A
OUT The control LEVEL has no function;
11
16 Jack PICKUP INPUT for connection to the
jack PICKUP OUTPUT (21) of the noise
detector
PA-100ANC
1.2 Noise detector
PICKUP
17 Switch PHANTOM POWER for switch-
POWER
GND
ON
OUTPUT
+4 dB/600
ing on the 20 V supply for a phantom-
20 21
powered microphone
Caution! Only actuate the switch with
the amplifier switched off; the volume of
the wanted signal will be increased by
switching noise .
18 XLR jack for connection of an electret mi-
crophone or a dynamic microphone
19 6 .3 mm jack (bal .) as an alternative micro-
phone input
20 POWER indication: lights up when the
noise detector has been connected to the
amplifier and the amplifier is switched on
21 Jack PICKUP OUTPUT for connection to
the jack PICKUP INPUT (16) of the am-
plifier
2 Safety Notes
This unit corresponds to all relevant directives
of the EU and is therefore marked with
WARNING The unit uses dangerous mains
•
The unit is suitable for indoor use only . Pro-
tect it against dripping water and splash
water, high air humidity and heat (admis-
sible ambient temperature range 0 – 40 °C) .
•
Do not place any vessels filled with liquid,
e . g . drinking glasses, on the unit .
•
The heat being generated in the unit must
be carried off by air circulation . Therefore,
the air vents at the housing must not be
covered .
•
Do not operate the unit or immediately
disconnect the mains plug
1 . if the unit or the mains cable is visibly
damaged,
2 . if a defect might have occurred after the
unit was dropped or suffered a similar
accident,
3.0
−9 −6 −3 0 dB +3 +6 +9 +12 +15 +18
3.5
5
The control LEVEL (14) is effective
the wanted signal is reduced to zero
when the microphone does not pick
OUTPUT
INPUT
up any ambient noise .
12
13
voltage . Leave servicing to
skilled personnel only and do
not insert anything into the air
vents: Risk of electric shock .
IN
CLIP
ON
OUT
SIGNAL BYPASS
6
7
8
3 . if malfunctions occur .
In any case, the unit must be repaired by
skilled personnel .
+3
0
+6
•
Never pull the mains cable to disconnect
-3
-6
-9 dB
+9
OUT
IN
the mains plug from the mains socket, al-
LEVEL
REFERENCE
PICKUP
INPUT
ways seize the plug .
14
15
16
•
For cleaning only use a dry, soft cloth; never
use chemicals or water .
•
No guarantee claims for the unit and no li-
ability for any resulting personal damage or
material damage will be accepted if the unit
is used for other purposes than originally
intended, if it is not correctly connected
or operated, or if it is not repaired in an
expert way .
If the unit is to be put out of oper-
ation de finitively, take it to a local
recycling plant for a disposal which
is not harmful to the environment .
3 Applications
PA-100ANC is specially designed for applica-
tion in PA systems and controls the volume
of a wanted signal (announcements, music)
depending on the ambient noise picked up
by a separate microphone . The higher the
ambient noise, the higher the unit adjusts
the volume of the wanted signal .
4 Placing of Amplifier, Noise
Detector and Microphone
.
1) The amplifier is provided for insertion into
a rack (482 mm / 19"); however, it can also
be used as a table top unit . In any case,
air must be allowed to pass through all air
vents without obstruction so that there will
be no heat accumulation in the unit . For
installation into a rack, one rack space is
required (= 44 .45 mm) .
2) Place the noise detector (fig . 4) near the
microphone so that only a short micro-
phone cable is required . The maximum
length of the connection cable between
detector and the amplifier may be 500 m .
3) To pick up the ambient noise, an electret
microphone or a dynamic microphone is
required . The following microphones of
the product range from MONACOR are
recommended:
DM-2500, ECM-302B, ECM-10 / . . .
Align the microphone so that it only
picks up the ambient noise, if possible,
and not the wanted signal radiated by
the speakers .
POWER
9
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