5
Operation
To prevent switching noise, first switch on the units
connected. Then for mains operation switch on the
amplifier with the POWER switch (2) or for 12 V oper-
ation with the switch DC POWER (21). If a 12 V emer-
gency power supply is connected, activate both
switches. The green LED above the POWER switch
(2) lights up.
5.1 Amplifier part
1) For the chime to sound prior to an announcement,
press the left edge of the button CHIME – SIREN
(1). The chime sounds at maximum volume.
2) Adjust the volume for the microphones with the con-
trols MIC 1 (3) and MIC 2 (4). If talking into the
microphone MIC 1 is made at sufficient volume, the
volume of all other input channels will be attenuated
so that the announcement can be heard better.
3) If an audio unit is connected to the jack LINE (5),
adjust its volume with the control LINE.
4) Mix the input signals with the volume controls
MIC 1, MIC 2, LINE and the signal of the CD player
with the buttons
and
(14) or fade them in and
out, if required. Always set the volume of the chan-
nels which are not used to zero.
5) For acoustic alarm the siren can be switched on
with the switch CHIME – SIREN (1). For this pur-
pose press down the right edge of the rocker. The
siren sounds at maximum volume. To switch off,
press the left edge.
6) After operation, switch off the amplifier first and
then all other units connected.
5.2 CD player
On the CD player it is possible to replay standard audio
CDs, also CDs you have burnt yourself (CD-R). In case
of rewriteable CDs (CD-RW), however, problems may
occur when replaying depending on the CD type, the
CD burner and the burning programme used. Also
compressed audio files (created with the most com-
mon compression procedure at present) of CDs and
via the USB interface (7) may be re played.
5.2.1 Note on sound interruptionsand reading errors
Cigarette smoke and dust easily penetrate through all
openings of the unit and also settle on the optics of the
laser system. If this deposit should cause reading
errors and sound interruptions, the unit must then be
cleaned by specialized personnel. There is a charge
on this cleaning, even during the warranty time!
5.2.2 Replaying titles
1) Switch on the CD player with the button
(15). It
must always be switched on additionally; also after
a power failure or when the amplifier is switched off
and on with the mains switch (2).
2) Open the CD tray (6) with the button
(16) and
insert a CD with the lettering facing upwards. Close
the tray with the button . After reading in (indica-
tion
), the first title starts automatically [indica-
tion (b)].
3) Additionally or alternatively a USB stick or a hard
disk (if required, with a power supply of its own) may
be inserted into the USB connection (7) or con-
nected to it.
4) To switch between the USB connection and a CD,
press the button CD / USB (11).
5) Adjust the volume of the CD player with the buttons
and (14)
[indication
… ].
6) The replay can be interrupted with the button
(10) at any time [indication (c) appears; the play-
ing time (h) flashes] and be continued.
7) To select another title, shortly press the button
(12) [to advance one title] or the button
[reverse
to the title beginning, each time the button is
pressed, one more title is reversed]. With a CD with
several folders (not for standard audio CDs) the
titles are replayed and selected in the following
order:
1. all titles without folder in the root directory
2. all titles in folders in the root directory
3. all titles in subfolders etc.
8) When replaying, it is possible to advance and
reverse within a title. For the advance keep the but-
ton
pressed, for the reverse the button
.
9) To stop the replay, press the button
(9).
5.2.3 Repeat functions and random replay
1) To repeat the title, press the button
(13) once.
The display shows REP (a).
2) To repeat all titles of the CD, press the button
a
second time. The display now shows REP ALL (e).
3) To replay the titles in a random order, press the
button
a third time. The display now shows
RAN (f).
4) To switch off the additional function, press the but-
ton
so many times, until the indication RAN will
be extinguished.
5.2.4 Anti-shock memory
The anti-shock memory of the CD player is capable of
compensating short-time interruptions by shocks or
vibrations when sampling a CD, however, not lasting,
heavy shocks. The more segments of the memory indi-
cation (i) are shown on the display, the longer interrup-
tions may be compensated.
10
GB
