Operation; Checking The Outputs; Activating The Chime; Siren - Monacor PA-40120 Mode D'emploi

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6 Operation

1) To prevent an excessive volume, turn the
output controls Z1 to Z4 (11) to "0" prior to the
first switching-on.
2) First switch on the audio sources connected,
then the PA-40120 with the POWER switch
(15). The power LED (14) and the LEDs PWR
(3) of the four output amplifiers light up. If
additional amplifier systems for PA applica-
tions are connected to the PA-40120, switch
them on last.
After operation switch off the units in
reverse order:
1. the additional amplifier systems
2. the PA-40120
3. the audio sources connected
The amplifier has a switch-on delay: approx.
one second after switching-on, the speakers
are ready for operation. For this time the
LEDs PROTECT (3) of the four outputs light
up.
3) For a basic setting first turn all controls for the
inputs LEVEL (9) and PAGING / PTT (13) fully
counter-clockwise and set the tone controls
(1) to mid-position.
4) Turn up the controls for the outputs Z1 to Z4
(11) used so far that the following adjust-
ments can well be heard via the speakers.
5) Switch on the input channels used with the
switch CH ON (10) in each case. The LED
above the switch lights up with the channel
switched on. Define for each input with the
switches Z1 to Z4 (2) at which outputs (i. e. in
which PA zones) its signal is to be given. If a
signal of sufficient level is present at the
input, the LED SIG. (8) lights up. If the LED
does not light up, increase the output level of
the audio sources or readjust the input ampli-
fication for the channels CH1 to CH3 with the
control GAIN (29) above the respective input
jack.
Mix the input signals with the correspon-
ding volume controls LEVEL (9) or fade them
in and out as required.
If an audio source is not used, switch off its
input channel with the switch CH ON (10).
6) Adjust the desired volume for the respective
PA zone with the output controls Z1 to Z4
(11).
CAUTION Never adjust a very high
speaker volume. Permanent
high volumes may damage
your hearing! The human ear
will get accustomed to high
volumes which do not seem to
be that high any more after
some time. Therefore, do not
further increase a high volume
after getting used to it.
To prevent a feedback noise, do not hold a
microphone towards a speaker or too close
to it. With a volume adjusted too high, like-
wise a feedback noise may occur. In this
case adjust a lower microphone volume
with the corresponding control LEVEL.
The level of the respective output is shown by
the LEDs -10, -6, 0 dB and CLIP (3). If the
LED CLIP lights up, the amplifier is over-
driven. In this case turn back the control (11)
for this output correspondingly or attenuate
the volume of the corresponding input signal
with the control LEVEL (9).
14
7) Adjust the sound with the controls (1) TRE-
BLE for the high frequencies and BASS for
the low frequencies. If required, readjust the
volume adjustment afterwards.

6.1 Checking the outputs

Via the integrated speaker (7) or a monitor sys-
tem connected to the jack MONITOR (26) the
signals of the outputs can be checked.
1) Select the output to be checked with the
rotary switch RECORDING / MONITOR (4). In
position OFF no output has been selected.
2) With the switch SPEAKER (5) define if the
internal speaker (7) should be used (button
pressed down) or not (button disengaged).
3) Adjust the desired volume with the control
LEVEL (6).
Notes
1. The output jacks REC (25) receive the same sig-
nal as the jack MONITOR (26).
2. If no outputs are to be checked via the speaker
(7) but warning signals are to be heard in case of
fault, do not switch off the speaker with the switch
SPEAKER (5) but set the rotary switch
RECORDING/MONITOR (4) to position OFF or
turn back the volume with the control LEVEL (6).
The control has no effect on the volume of the
warning signals.

6.2 Activating the chime

For the chime to sound, e. g. to notify an
announcement via one of the inputs CH1 to
CH3, shortly press the corresponding momen-
tary pushbutton connected to the terminals (31)
[ chapter 5.8]. The chime is added to the input
signal but its volume does not depend on the
control LEVEL (9) of the input channel; it only
depends on the volume adjustment of output
(11).
Like for an announcement via the inputs
CH1 to CH3, the input signals of the input chan-
nels of lower priority, CH4 and CH5, are muted
while the chime sounds.

6.3 Siren

For a siren sound of high volume in all PA zones
actuate the switch connected to the terminals
(31) [ chapter 5.8]. Contrary to the chime
which ends automatically the siren can be heard
until switching-off.
The siren volume is independent of the vol-
ume controls for the outputs (11) and cannot be
changed.

6.4 Desk microphone PA-4000PTT

For announcements with this desk microphone:
1) Select with the switches ZONES SELECTOR
(12) on the amplifier in which PA zones the
announcement should be heard. Press down
the switches of the desired zones, disengage
the other switches.
2) Turn up approx. halfway the control for the
volume LEVEL-PAGING / PTT (13) on the
amplifier prior to the first announcement.
3) Keep the TALK button (37) pressed at the
microphone and talk into the microphone car-
tridge (35). The indicating LED (36) lights up.
When exceeding a certain talk volume, the
input signals of lower priority are automati-
cally muted at the amplifier (
chapter 3).
4) If required, readjust the volume of the an -
nouncement with the control LEVEL-PAGING /
PTT. The volume controls for the outputs (11)
have no effect in this case.

6.4.1 Adjustments at the PA-4000PTT

There are two small switches on the rear side of
the desk microphone:
PRIORITY – for use at the PA-40120 leave
this switch in the upper position, as the prior-
ity for this microphone is defined in the ampli-
fier (for a better intelligibility of an announce-
ment the other input signals are muted as
soon as talking starts or the chime sounds)
CHIME – in position ON first a chime sounds
when pressing the TALK button (37); the
sound of the chime is the same as if activated
via a momentary pushbutton connected to
the amplifier. It can be selected in the ampli-
fier (
6.5 Announcement via the input
PAGING
For an announcement via a unit connected to the
input PAGING (30) [e. g. microphone with pre-
amplifier or the line level output of a telephone
system] proceed as described in chapter 6.4.
The adjustments apply likewise to the desk
microphone PA-4000PTT and the input PAG-
ING. A signal at the input PAGING also results in
muting the input signals of lower priority. It is
mixed with the signal of the desk microphone if
an announcement is made via the desk micro-
phone at the same time.
6.6 Zone-paging microphone
PA-4000RC
For announcements with a PA-4000RC:
1) Turn up approx. halfway the volume control
AUDIO LEVEL (50) on the rear side of the
zone-paging microphone prior to the first
announcement.
2) With the buttons under Z1 to Z4 (47) prese-
lect the PA zones in which the announcement
is to be heard. The LED BUSY next to the
button lights up for the zones selected.
To deselect a zone, press the correspon-
ding button again so that the LED BUSY
extinguishes. To select and deselect all
zones, press the button ALL CALL (48).
If the BUSY LEDs flash, an announcement
via another zone-paging microphone is just
made in the corresponding PA zones. A
simultaneous announcement via several
zone-paging microphones is not possible (not
even if different zones are to be addressed).
If the current announcement via a zone-
paging microphone of higher or the same
priority is made, wait for the end of this
an nouncement. An interruption of the an -
nouncement is only possible by a micro-
phone of higher priority (to adjust the priority
chapter 6.6.2).
3) Keep the TALK button (49) pressed and talk
into the microphone cartridge (46). The indi-
cating LED above the button lights up. When
pressing the button, the input signals of lower
priority are automatically muted at the ampli-
fier (
4) If required, readjust the volume of the
announcement with the control AUDIO
table fig. 6 in LEVEL (50). The volume controls for the out-
puts (11) have no effect in this case.
chapter 5.8.1)
table fig. 6, chapter 3).