Voice Transmission
System
Please read these operating instructions care-
fully prior to operation and keep them for later
reference.
1 ATS-20T only: antenna
2 3.5 mm jack
ATS-20R: jack
for the earphone
ATS-20T: jack
for the tie-clip microphone
or an audio unit
3 Display for
battery status
channel lock
volume adjusted ( = mute)
CH 01 … 16 transmission channel
4 On / off button
(keep button pressed for 2 seconds)
additional function for ATS-20T:
to mute the audio signal
5 Buttons + and −:
– As long as the symbol
is indicated, the
buttons on ATS-20R are used to adjust the
earphone volume and on ATS-20T to adjust
the microphone sensitivity.
– To set the transmission channel, keep both
buttons pressed for 2 seconds: The symbol
will disappear and the letters CH will
start flashing. Then use the button + or − to
set the channel.
6 Micro USB port to recharge the battery
1
Applications
In combination with one or multiple receivers
ATS-20R, the transmitter ATS-20T provides a
mobile digital wireless system for transmitting
spoken language, e. g. for guided tours, lectures
in different languages or wireless command
transmission. For wireless transmission, 16
channels are available in the frequency range
863 – 865 MHz; up to 4 of these channels may be
used at the same time without mutual interfer-
ence. The transmission range de pends on local
conditions and may reach 100 m as a maximum.
2 Important Notes
The units correspond to all relevant directives of
the EU and are therefore marked with
.
G
The units are suitable for indoor use only. Pro-
tect them against dripping water and splash
water, high air humidity and heat (admissible
ambient temperature: 0 – 40 °C).
G
For cleaning only use a dry, soft cloth; never
use water or chemicals.
G
No guarantee claims for the units and no liabil-
ity for any resulting personal damage or mate-
rial damage will be accepted if the units are
used for other purposes than originally
intended, if they are not correctly connected or
operated, or if they are not repaired in an
expert way.
2.1 Conformity and approval
Herewith, MONACOR INTERNATIONAL declare
that the transmitter ATS-20T is in accordance
with the basic requirements and the other rele-
vant regulations of the directive 1999 / 5 / EC. The
declaration of conformity is available on request
from MONACOR INTERNATIONAL. The trans-
mitter is generally ap proved for operation in EU
and EFTA countries; it is licence-free and
requires no registration.
3
Setting into Operation
3.1 Recharging the battery
For mobile operation, the units are equipped
with a rechargeable lithium battery. With a fully
charged battery, the operating time of the re
-
ceiver will be approximately 20 hours and the
operating time of the transmitter approximately
16 hours.
It is recommended to recharge the battery
before longer use or when the symbol
on the
display (3) starts flashing. To recharge the bat-
tery, the transport bags ATS-12CB and ATS-
35CB are ideally suited; these bags are
equipped with a charging section. The units also
offer a micro USB port (6). This port can be used
to connect a power supply unit with micro USB
plug or to connect the USB port of a computer by
means of a suitable USB cable.
As soon as the charging process starts, the
transmitter
/
receiver is switched off, but the
charging process can be checked via the battery
status indication . The charging time is approx-
imately 6 hours.
3.2 Connecting the microphone or an audio
unit and connecting the earphone
1) Connect the microphone supplied to the jack
(2) of the transmitter (white housing) and
use the clip to attach the microphone to your
clothes (e. g. tie, lapel).
When using the transmitter for wireless
transmission of line audio signals, connect an
audio unit (CD/ MP3 player, radio etc.) to the
jack
. Always use a 3-pole 3.5 mm plug
to connect an audio unit. The trans-
mitter will automatically switch the input from
microphone level to line level.
2) Connect the earphone provided to the jack
(2) of the receiver (black housing) and attach
it to your ear.
4
Operation
1) First switch on the receiver only: Keep the
button
(4) pressed until the display (3) is
switched on.
As long as no signal is received, the dis-
play will keep flashing. If no signal is received
for 20 minutes, the receiver will be switched
off automatically to save the battery.
2) Set the receiver to a free transmission chan-
nel: Keep the two buttons + and − (5) pressed
for 2 seconds: The symbol
on the display
will disappear and only the letters CH and the
symbol
will keep flashing. Use the button +
or − to set the channel. To confirm the setting,
press the button
or wait for 5 seconds. The
symbol
will reappear and all indications
will start flashing.
The display must keep flashing. If it stops
flashing, interference or signals from other
transmitters are received. In this case, use a
different channel.
3) If multiple ATS-20 systems are used at the
same time for transmitting different kinds of
information or different languages, set a dif-
ferent transmission channel for each separate
system. You will be able to make four voice
transmissions at the same time if you use the
following channels:
1 – 4 or 5 – 8 or 9 – 12 or 13 – 16
4) Switch on the transmitter and set it to the
transmission channel of the receiver. Once a
signal is received, the display of the receiver
will stop flashing.
Note: The minimum distance between the
transmitter and the receiver must be 20 cm;
otherwise, the receiver will be muted and its
display will keep flashing.
Hint: To set multiple receivers to the same
channel at the same time, keep the buttons
,
+ and − on the transmitter and on all receivers
pressed until the units are switched off. Then
switch on the units again: All units have been
set to channel 00. If you now set the transmit-
ter to the desired channel, all receivers will
also be set to the same channel.
After that it will also be possible to change
the channel on the transmitter during trans-
mission (e. g. in case of interference); all
receivers that have been switched on will fol-
low automatically.
5) As long as the symbol
is indicated on the
display, the buttons + and − of the receiver
can be used to adjust the volume for the ear-
phone.
Caution! Never adjust a very high volume.
Permanent high volumes may damage your
hearing!
6) When a microphone is connected to the trans-
mitter, use the buttons + and − to adjust the
microphone sensitivity (in four levels from
to
). When an audio unit is con-
nected, one segment behind the symbol
starts flashing: The input is set to line level.
If the transmitter fails to switch automatically
to microphone level or line level:
To switch to line level, keep the button −
pressed for 5 seconds until a segment starts
flashing next to the symbol .
To switch to microphone level, keep the but-
ton + pressed for 5 seconds until the display
indicates at least 4 segments (
).
7) To mute the transmitter, briefly press the but-
ton
/
(4). The symbol
keeps flashing
as an indication. To unmute, press the button
once again.
8) To switch off the units, keep the button
of
each unit pressed until the display is switched
off.
5
Specifications
Transmission frequency: 863 – 865 MHz
Transmission power: . . . ≤ 10 mW (EIRP)
Range: . . . . . . . . . . . . . . approx. 100 m
Max. input voltage: . . . .
50 mV (microphone)
950 mV (audio unit)
Power supply
of microphone: . . . . . . . 2 V
Power supply: . . . . . . . . lithium-ion battery,
3.7 V/ 600 mA
Dimensions
without antenna: . . . . . . 40 × 69 × 12 mm
Weight: . . . . . . . . . . . . . 37 g
Channel assignment
Subject to technical modification.
CH
MHz
CH
MHz
CH
MHz
CH
MHz
01 863.060 05 863.185 09 863.310 13 863.435
02 863.560 06 863.685 10 863.810 14 863.935
03 864.060 07 864.185 11 864.310 15 864.435
04 864.560 08 864.685 12 864.810 16 864.935
If the units are to be put out of operation
definitively, take them to a local recy-
cling plant for a disposal which is not
harmful to the environment.
GB
