12
English
3) It is possible to briefly indicate the radio fre-
quency for the channel adjusted: as long as
the button
△
or
▽
is kept pressed, the dis-
play will indicate the frequency instead of
the channel .
4) If the transmitter is switched on and set to
the same channel as the receiver module, the
LED RX (23) will light up to indicate reception
of a radio signal . The LED AF (17) will light
up if the transmitter transmits an audio sig-
nal of sufficient level on the radio frequency
adjusted .
5) Use the control (27) to adjust the desired vol-
ume for the audio signal received .
7.2 Operating the 2-channel
receiver module
1) The receiver units A and B of the module
provide a control (29), CH .A and CH .B re-
spectively, to adjust the volume and to switch
them on and off . To switch a receiver unit on,
advance the corresponding control from the
position “OFF” . The left half of the display
(28) applies to receiver unit A, the right half
applies to receiver unit B . When a receiver
unit has been switched on, the corresponding
half of the display will indicate the transmis-
sion channel . To indicate the radio frequency,
press an arrow button (
△
for unit A,
▽
for
unit B) . The previous indication will reappear
after 2 seconds .
2) Use the buttons (30) of the module to
set
the transmission channels
, either manually
or by means of an automatic scan . Leave the
corresponding transmitters switched off for
the time being .
Channel scan:
Keep the buttons
△
and
▽
simultaneously
pressed for approx . 1 second until
appears on the display . The scan will start:
The receiver units will be set to free channels
without mutual interference . If no free chan-
nels are found, the channels set will be kept .
Manual channel selection:
If
both
receiver units A and B are switched on:
1 . Keep the button SET pressed until the
channel indication for receiver unit A starts
flashing on the display .
2 . Select the channel for receiver unit A with
the button
△
or
▽
and then confirm with
the button SET .
3 . The channel indication for receiver unit B
starts flashing on the display . Select the
channel for receiver unit B with the but-
ton
△
or
▽
and then confirm with the
button SET .
If only
one
receiver unit A or B is switched on:
Keep the button SET pressed until the channel
indication starts flashing on the display . Select
the channel with the button
△
or
▽
and then
confirm with the button SET .
If a channel is not confirmed within
10 seconds with the button SET, the setting
mode will be exited and the channel previ-
ously set will be kept .
Note:
The receiver units cannot be set to the same
channel .
If, with the transmitter switched off, the re-
spective segment bar A or B on the display
indicates reception, interference signals or
signals from other transmitters are being re-
ceived . In this case, select a different channel .
3) Switch the transmitters on and set them to
the channels of the receiver module: Set one
transmitter to the channel of receiver unit A
and set the second transmitter to the channel
of receiver unit B .
The respective segment bars on the dis-
play will indicate the strength of the radio
signals received . Use the controls (29) to ad-
just the desired volume for each receiver unit .
If no reception is indicated or if the reception
is poor, check if:
– the batteries of the transmitter are dis-
charged .
– the reception is disturbed by metal objects
or other high-frequency sources .
– the distance between the transmitter and
the receiver module is too long .
– the threshold value for interference sup-
pression (squelch) is too high (see chapter
7 .2 .2) .
7.2.1 Changing the group setting
(for operation with 2 receiver modules)
The unit can be extended by another 2-chan-
nel receiver module (available as article TXA-
1822MR) . To set the four transmission channels
via channel scan, change the group setting of
both receiver modules:
1) Switch off the receiver units A and B . Then
keep the button SET pressed while switching
on a receiver unit . The display will indicate the
current group setting
(with the number
flashing) .
2) Use the button
△
or
▽
to switch to
.
3) Press the button SET to exit the group setting
mode . The squelch setting mode will be acti-
vated; to exit the mode, press the button SET .
Note:
The setting modes will be automatically exited
after 5 seconds if no button is pressed . Any settings
made will be saved .
Perform the channel scan for the first receiver
module, switch on the appropriate two trans-
mitters and set them accordingly . Leave the
two transmitters switched on so that channels
already used will be skipped during the channel
scan for the second receiver module . Then per-
form the channel scan for the second receiver
module, switch on the two appropriate trans-
mitters and set them accordingly .
7.2.2 Setting the squelch
The squelch function will mute the respective
receiver unit when the level of the radio signal
falls below the threshold value adjusted . Thus,
interference signals will not cause noise when
the transmitter is switched off or when its radio
signal is insufficient: If the levels of the interfer-
ence signals are below the threshold value, the
receiver unit will be muted .
A high threshold value offers high inter-
ference resistance, but it will also reduce the
transmission range . Thus, when the reception is
good, a high threshold value can be used; how-
ever, when the transmitter and the receiver are
far apart, a low threshold value is recommended .
1) Switch off the receiver units A and B . Then
keep the button SET pressed while switching
on a receiver unit . The display will indicate the
group setting (
or
, with the number
flashing) .
2) Press the button SET to exit the group set-
ting mode and to activate the squelch setting
mode:
(for “Squelch”) and the current
value (flashing) will appear on the display .
3) Use the button
△
or
▽
to set the value
(level 7 = highest threshold value) . Press the
button SET to exit the squelch setting mode .
Note:
The setting modes will be automatically
exited after 5 seconds if no button is pressed . Any
settings made will be saved .
7.3 Operating the
Bluetooth receiver
The Bluetooth receiver can be used to establish a
wireless connection to a Bluetooth audio source
(e . g . smartphone, tablet PC, MP3 player) which
allows the amplifier system to replay audio data .
Note:
The Bluetooth source must be compatible with
the A2DP protocol (Advanced Audio Distribution Pro-
file); otherwise, no wireless connection will be possible .
1) To switch on the Bluetooth receiver, keep the
button (15) pressed for approx . 2 seconds .
The button will start flashing to indicate that
there is no connection to the Bluetooth source
and that the Bluetooth receiver is ready for
“pairing” (linking the Bluetooth source to the
Bluetooth receiver) .
2) At the Bluetooth source, switch on the Blue-
tooth function and perform the “pairing”
process (see the instructions of the Bluetooth
source, if required) . On the display of the
Bluetooth source, the Bluetooth receiver is
indicated as “TXA SERIES” . The button will
be continuously illuminated once the linkage
has been established .
3) At the Bluetooth source, start the replay of
audio data . The Bluetooth source can be
operated as desired (title selection, volume
adjustment, pause, etc .) .
4) At the active speaker system, use the control
AUX (8) to adjust the volume .
Note:
The volume control will also apply to the
unit that is connected to the input AUX IN (13);
therefore, do not use this input during Bluetooth
operation . Otherwise, both audio sources will be
reproduced at the same time .
5) When the Bluetooth connection is discon-
nected (e . g . when the Bluetooth source is
moved outside of the range of the wireless
connection), the button will restart flashing .
The connection must be re-established .
6) To switch off the Bluetooth receiver, briefly
press the button . The button will not be
illuminated anymore .
7.4 Operating the CD / MP3 player
The player allows to replay not only standard
audio CDs but also CDs, USB storage media and
SD / SDHC memory cards with MP3 files .
Notes
1 . Depending on the CD type, the CD burner and the
burning program used, problems may occur when
CD-RWs are replayed .
2 . The player also supports the reproduction of WMA
files .
3 . Due to the large number of storage device manu-
facturers and device drivers, it cannot be guaran-
teed that all storage media are compatible with
this player .
4 . Cigarette smoke and dust will easily penetrate
through all openings of the player and also settle
on the optics of the laser sampling system . If this
deposit causes reading errors and sound interrup-
tions, the player must be cleaned by skilled per-
sonnel . Please note that there will be a charge on
cleaning, even during the warranty period!
