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4-Channel Receiver for
Wireless Microphones
These instructions are intended for users
without any specific technical knowledge .
Please read these instructions carefully prior
to operating the unit and keep them for later
reference .
All operating elements and connections
described can be found on the fold-out page 3 .
1 Operating Elements and
Connections
1
Display to indicate
– the channel group (GROUP 00 – 09)
– the channel (CHANNEL 00 – 99)
The corresponding frequencies can be
found in the table on pages 16 / 17 .
– the signal level (VOL 00 – 63) used to
add the microphone signal of the re-
ceiver section to the jack LINE OUT (13)
– the RF signal strength ( )
2
Indicators ANTENNA A and B:
Indicate which of the two antennas re-
ceives the radio signal of higher strength .
3
Signal indicator AF (Audio Frequency):
Indicates reception of a microphone signal
when a specific volume has been reached .
4
IR LED to send infrared signals for setting
the channel of the wireless microphone
5
Button ACT
1 . To send infrared signals for setting the
channel of the wireless microphone:
Press the button briefly .
2 . To automatically scan a free receiving
channel: Keep the button pressed until
the display indicates the scan mode
(
) .
6
Button SET: To change the channel group,
the channel number or the mixing ratio of
the microphone signals at the jack LINE
OUT (13), press the button SET repeatedly
until the corresponding digits start flash-
ing on the display . As long as the digits
keep flashing, use the button
or
(7)
to make the setting .
7
Buttons
and
to set the channel
group, the channel number and the mix-
ing ratio of the microphone signals
8
Receiving antennas A and B
9
POWER button
1 . To switch on, keep the button pressed
until the displays light up .
2 . To switch off, keep the button pressed
until OFF appears on the displays .
10
Antenna jacks
11
Control SQUELCH to set the threshold
value for interference suppression (one
each for the receiver sections 1– 4)
12
XLR audio output for connection to a
microphone input
(one each for the receiver sections 1– 4)
13
Audio output (6 .3 mm jack) for the mixed
signal of the receiver sections 1– 4, for
connection to a line input
14
Power supply jack to connect the power
supply unit provided
2 Safety Notes
The units (receiver and power supply unit)
correspond to all relevant directives of the EU
and are therefore marked with .
WARNING
The power supply unit uses
dangerous mains voltage .
Leave servicing to skilled per-
sonnel; inexpert handling may
result in electric shock .
•
The units are suitable for indoor use only .
Protect them against dripping water and
splash water, high air humidity as well as
high and low temperatures (admissible am-
bient temperature range 0 – 40 °C) .
•
Do not place any vessels filled with liquid,
e . g . drinking glasses, on the units .
•
Immediately disconnect the power supply
unit from the mains socket if
1 . the receiver or the power supply unit is
visibly damaged,
2 . a defect might have occurred after a
unit was dropped or suffered a similar
accident,
3 . malfunctions occur .
In any case the units must be repaired by
skilled personnel .
•
For cleaning only use a dry, soft cloth; never
use water or chemicals .
•
No guarantee claims for the units and no
liability for any resulting personal damage
or material 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 .
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
Combined with up to four wireless micro-
phones, the 4-channel receiver TXS-646
creates a wireless audio transmission system
ideally suited for conferences as well as for
musicians and live performances on stage .
The True Diversity* receiver uses the UHF
range 672 .000 – 696 .975 MHz .
* True Diversity technology:
The signal sent from
the wireless microphone is received by two anten-
nas and amplified in two separate receiver sections .
The signal of the highest power is then processed .
Frequency setting via the ACT function (Auto-
matic Channel Targeting) is a most convenient
feature: Simply press a button to set the wire-
less microphone via IR signal to the channel
selected on the receiver .
3.1 Accessories
The following wireless microphones from IMG
STAGELINE can be used together with the
TXS-646:
Item
Order
number
Type
TXS-606DT
25 .7310
Wireless desktop
microphone
TXS-606HSE 25 .4690
Pocket transmitter for
microphones with
3-pole mini XLR plug
TXS-606HT
25 .3540
Hand-held wireless
microphone
TXS-606LT
25 .3550 Pocket transmitter with
tie-clip microphone
3.2 Conformity and approval
Herewith, MONACOR INTERNATIONAL de-
clare that the receiver TXS-646 complies with
the directive 2014 / 53 / EU . The EU declaration
of conformity is available on the Internet:
www .imagestageline .com
The receiver may be operated in the following
countries:
DE
Prior to operating the wireless audio transmis-
sion system outside Germany, please contact
the MONACOR subsidiary or the correspond-
ing authorities of the respective country . Links
to the national authorities can be found via
the following Internet address:
www .cept .org
t
ECC
t
Topics / Info
t
SRD* Regulations and indicative list of
equipment sub-classes
t
Tools and Services
t
EFIS − ECO Frequency Information System
t
National Frequency Tables
* Short Range Devices
4 Operation
4.1 Setting up, connecting and
switching on the receiver
Prior to connecting / disconnecting, switch off
all units concerned .
1) The receiver is designed for installation
into a rack (482 mm /19”); however, it can
also be placed on a table . For installation
into a rack, two rack spaces (89 mm) are
required .
2) Insert the two receiving antennas (8) sup-
plied into the antenna jacks ANT A and
ANT B (10) . To lock the antennas, turn
the knurled ring of the plug clockwise to
the stop . Then place the antennas into a
vertical position . To remove the antennas,
turn the ring counter-clockwise .
The mounting brackets TXS-100BNC
can be used to install the antennas outside
the rack, e . g . if there is not enough space
for the antennas or if other units in the
rack shield the radio waves . The mounting
brackets are equipped with a 1 m connec-
tion cable .
