Operation; 1 Checking The Outputs; 2 Activating The Chime; 3 Siren - Monacor PA-40120 Mode D'emploi

6

Operation

1) To prevent an excessive volume, turn the out-
put controls Z1 to Z4 (11) to "0" prior to the
first switching-on .
2) First switch on the audio sources connected,
then switch on 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
applications 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 switch-on, the speakers are
ready for operation . For this time the LEDs
PROTECT (3) of the four outputs light up .
3) For a basic settings, first turn all controls for
the inputs LEVEL (9) and PAGING / PTT (13)
to the left stop 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 ad-
justments can well be heard via the speakers .
5) Switch on the input channels used with the
switch CH ON (10) . The LED above the switch
lights up with the channel switched on . Use
the switches Z1 – Z4 (2) to define for each
input to which outputs (i . e . PA zones) its sig-
nal shall be routed . The LED SIG (8) lights up
when a signal of sufficient strength is avail-
able at the input . If the LED does not light
up, increase the output level of the audio
sources or readjust the input gain for the
channels CH1 to CH3, using the control GAIN
(29) located above the respective input jack .
Mix the input signals with the corre-
sponding 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 respec-
tive 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! Your 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 . Likewise, feedback noise may occur
when the volume adjustment of the speak-
ers is too high . In this case, attenuate the
microphone volume, using the respective
control LEVEL .
The level of the respective output is indicated
by the LEDs −10, −6, 0 dB and CLIP (3) . If
the LED CLIP lights up, the amplifier is over-
loaded . 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) .
7) Adjust the sound with the controls (1) TREBLE
for the high frequencies and BASS for the low
frequencies . If required, readjust the volume
afterwards .
14

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) Use the rotary switch RECORDING MONITOR
(4) to select the output to be checked . In
position OFF no output has been selected .
2) Use the switch SPEAKER (5) to 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 signal
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 precede an
announcement via one of the inputs CH1 to
CH3, briefly 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 de-
pends on the volume adjustment of output (11) .
Like the announcements made via the in-
puts CH1 to CH3, the input signals of the input
channels 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 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 am-
plifier prior to the first announcement .
3) Keep the TALK button (37) pressed at the
microphone and talk into the microphone
cartridge (35) . The LED indicator (36) lights
up . When is exceeded, a certain talk volume,
the input signals of lower priority are auto-
matically muted at the amplifier (
fig . 6 in chapter 3, page 12) .
4) If required, readjust the volume of the
announcement with the control LEVEL-
PAGING / PTT . The volume controls for the
outputs (11) have no effect .
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 priority
for this microphone is defined in the amplifier
(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 ( chapter 5 .8 .1)
6.5 Announcement via the
input PAGING
For an announcement via a unit connected to
the input PAGING (30) [e . g . microphone with
preamplifier or the line level output of a tele-
phone 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 will also mute
the input signals of lower priority . It is mixed
with the signal of the desk microphone if an
announcement is made via the desk microphone
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 (48) on the rear side of the
zone-paging microphone prior to the first
announcement .
2) With the buttons under Z1 to Z4 (50), 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 correspond-
ing button again so that the LED BUSY ex-
tinguishes . To select and deselect all zones,
press the button ALL CALL (51) .
If the BUSY LEDs flash, an announce-
ment via another zone-paging microphone
is being 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
announcement . An interruption of the
announcement is only possible by a micro-
phone of higher priority (to adjust the priority
☞
chapter 6 .6 .2) .
3) Keep the TALK button (52) pressed and talk
into the microphone cartridge (49) . The
LED indicator above the button lights up .
When pressing the button, the input signals
of lower priority are automatically muted
☞
table
at the amplifier (
page 12) .
4) If required, readjust the volume of the an-
nouncement with the control AUDIO LEVEL
(48) . The volume controls for the outputs
(11) have no effect .
☞ table fig . 6, chapter 3,