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Les langues disponibles
1 . The wire which is coloured blue must be
connected to the terminal in the plug which
is marked with the letter N or coloured black .
2 . The wire which is coloured brown must be
connected to the terminal which is marked
with the letter L or coloured red .
If the units are to be put out of oper-
ation definitively, take them to a local
recycling plant for a disposal which is
not harmful to the environment .
3 Applications
In combination with two transmitters of the
TXS-891 series by IMG STAGELINE, the 2-chan-
nel multifrequency receiver TXS-891 makes up
a wireless audio transmission system which
is ideally suited for musicians and live perfor-
mance on stage . The wireless transmission of
music or speech to the audio system ensures
the musician's freedom of movement during the
performance . The transmission range depends
on the local conditions; a maximum range of
100 m may be reached . For audio transmission,
16 channels are available, to be freely selected
in the UHF frequency range of 863 – 865 MHz .
Both receiving units use the "Diversity"
technology: The transmission signal is received
by two antennas placed at a distance from
each other and checked for its quality . An elec-
tronic system switches in a noiseless way to the
antenna with the best signal quality .
3.1 Conformity and approval
Herewith, MONACOR INTERNATIONAL declare
that the receiver TXS-891 complies with the
directive 2014 / 53 / EU . The EU declaration of
conformity is available on the Internet:
www .imgstageline .com
The receiver is generally approved for operation
in EU and EFTA countries .
4 Rack Installation
The receiver is provided for use as a table top
unit or for installation into a rack for units of a
width of 482 mm (19") . For rack installation, un-
screw the four feet, then screw the two supplied
mounting brackets with two screws each to the
front at the left and right sides of the housing .
5 Connection
1) Insert the two supplied antennas (4) into the
BNC jacks ANT . 1 and ANT . 2 (8) and put
them in a vertical position .
Hint: The pair of signal amplifiers TXS-875B (avail-
able as an accessory) can be used to increase the
transmission range and the interference resistance .
The amplifiers are supplied with power via the
antenna jacks of the receiver .
2) For connecting the subsequent unit (e . g .
mixer, amplifier), the following audio out-
puts can be used:
– bal . XLR outputs CH .1 and CH .2 (9) for the
output signals of the individual receiving
units, for connection to a balanced micro-
phone input each
– unbal . 6 .3 mm jack MIXED OUT (11) for the
master signal of the two receiving units,
for connection to a line input (a matching
connection cable is supplied)
3) Connect the supplied power supply unit to
the jack 12 V ⎓ (12) for power supply and
connect the mains plug of the power supply
unit to a mains socket (230 V/ 50 Hz) .
6 Operation
Switch on the receiver with the switch POWER (3) .
The display (7) shows the channel indications (f)
of the transmission channels adjusted for the two
receiving units . As long as a receiving unit does
not receive a radio signal of sufficient power, it
is muted [symbol
(g) is displayed] .
Make the following adjustments separately for
each receiving unit .
1) Switch on the transmitter . If the channel in-
dication (f) displays a different channel than
the one adjusted on the transmitter, adjust
the receiving unit to the channel of the trans-
mitter
chapter 6 .1 .
☞
If the transmitter and the receiving unit
have been adjusted to the same transmis-
sion channel and the reception of the radio
signal is of sufficient power, the muting is
deactivated [symbol
(g) disappears] . One
of the indications
or
(e) lights up to indi-
A
B
cate which of the two antennas receives the
more powerful radio signal . The bar graph
(c) indicates the reception quality: the
RF
more segments are displayed, the better is
the reception .
With a poor or disturbed reception, check if
a the reception can be improved by using a
different transmission channel .
b the batteries of the transmitter are not
sufficiently charged any more (see battery
status indication on the transmitter) .
c the distance between the transmitter and
the receiver is too long .
d the reception is disturbed by objects in the
transmission path .
e the reception can be improved by turning
the antennas .
f the squelch adjusted with the squelch con-
trol (10) is too high (see operating step 4) .
2) Switch on the subsequent audio unit or open
the corresponding control on the mixer .
3) Speak / sing into the wireless microphone and
match the output level of the receiving unit
to the input of the subsequent unit with the
volume control (5) .
The volume of the audio signal received
is shown on the display via the bar graph
(d): the more segments are displayed,
AF
the higher is the volume level . Adjust the
optimum volume on the transmitter (
instruction manual of the transmitter) .
4) With the squelch control (10) – CHANNEL 1
for receiving unit 1, CHANNEL 2 for receiv-
ing unit 2 – define the threshold value for
the response of the squelch . The further the
control is turned clockwise, the higher is the
threshold value .
The squelch will mute the receiving unit
if high-frequency interference signals with
a level below the threshold adjusted are
received during music intervals . With a higher
threshold value, however, the operating
range of the wireless transmission system will
be reduced as the receiving unit will also be
muted if the power of the radio signal of the
microphone falls below the threshold value
adjusted . Thus, a higher threshold value may
be adjusted with the squelch control if the
reception of the microphone signal is good .
However, with a longer distance between the
transmitter and the receiver, a lower value
should be selected .
5) After operation, switch off the receiver with
the switch POWER (3) .
If the receiver is not used for a longer
period, disconnect the power supply unit
from the mains supply as it will have a low
current consumption even with the receiver
switched off .
6.1 Adjusting the transmission channel
1) In the operating panel of the receiving unit,
press the key
1 s) . On the display, the indication (b) for the
channel adjusting mode starts flashing:
(for receiving unit 1) or
unit 2) .
2) As long as the indication keeps flashing, the
channel can be selected: With the key
the channels are scanned in ascending order;
with the key
, they are scanned in descend-
ing order . The 16 transmission channels are
assigned to the following received frequen-
cies: The corresponding frequencies can be
found in the table on page 3 .
3) Approx . 3 seconds after the last actuation
of a key, the indication
appear and the receiving unit will exit the
channel adjusting mode .
Note: It is not possible to set both receiving units to the
same channel . The channel selected for the first receiv-
ing unit will be automatically skipped during channel
adjustment for the second receiving unit .
6.1.1 Lock mode
(locking the channel selector keys)
To prevent accidental change of the transmission
channels selected, it is possible to activate the
lock mode . With the lock mode activated, it is
not possible to call the channel adjusting mode
for any of the two receiving units .
1) To activate the lock mode, in one of the oper-
ating panels, keep the keys
simultaneously until
2) To deactivate the lock mode, in one of the
operating panels, keep the keys
pressed simultaneously until
Note: The lock mode is automatically deactivated each
time the unit is switched on .
7 Specifications
Type of unit: � � � � � � � � � �PLL multifrequency receiver
Radio frequency range: � �863 – 865 MHz,
see
☞
Audio frequency range: � �40 – 18 000 Hz
THD: � � � � � � � � � � � � � � � �< 0�6 %
Dynamic range: � � � � � � � �> 105 dB
Squelch: � � � � � � � � � � � � �Pilot tone squelch,
Audio outputs
2 × XLR: � � � � � � � � � � � �150 mV/ 150 Ω (bal�)
1 × 6�3 mm jack: � � � � �500 mV/ 1 kΩ (unbal�)
Ambient temperature: � � �0 – 40 °C
Power supply: � � � � � � � � �via the supplied power
Dimensions
(w/o antennas): � � � � � � � �W 420 × H 55 × D 230 mm
Weight: � � � � � � � � � � � � � �2�1 kg
Subject to technical modification .
All rights reserved by MONACOR
GmbH & Co. KG. No part of this instruction manual
may be reproduced in any form or by any means for
any commercial use.
or
(6) (for a minimum of
RX1
(for receiving
RX 2
,
or
will dis-
RX1
RX 2
and
pressed
(a) is displayed .
LOCK
and
disappears .
LOCK
in "Diversity" technology
divided into 16 channels
(
table, page 3)
☞
noise mute
supply unit connected to
230 V/ 50 Hz
INTERNATIONAL
®
7
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