RU210
Dual Multi-UHF Wireless System
Item ref: 171.970UK, 171.971UK
User Manual
Version 1.0
Caution: Please read this manual carefully before operating
Damage caused by misuse is not covered by the warranty
Introduction
Thank you for choosing the Citronic RU210 wireless system. This professional wireless set provides 2 high
quality microphones with a PLL tuned UHF radio system for freedom of movement without loss of audio
quality. Please read this manual before using this equipment in order to avoid damage through incorrect
operation and to get the best performance from your purchase.
Package Contents
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Dual UHF wireless receiver
19” rack ears
2 x UHF antennas
2 x BNC antenna extension leads
2 x handheld transmitters or 2 x bodypack receivers with neckband and lavalier microphones
Mains power adapter
6.3mm mono jack lead
4 x 1.5V AA battery
If you find any accessory is missing or the product has arrived with any problems, please contact your retailer
at once.
This product contains no user-serviceable parts so make no attempt to try to fix or modify this item yourself
as this will invalidate the warranty. We recommend you keep the original package and proof of purchase for
any possible replacement or returned demand.
Warning
To prevent the risk of fire or electric shock, do not expose any of the components to rain or moisture.
If liquids are spilled on any component, stop using immediately, allow unit to dry out and have checked by
qualified personnel before further use.
Avoid impact or heavy vibration to any of the components, dropping a microphone can cause capsule failure.
No user serviceable parts inside transmitter or receiver - refer servicing to qualified service personnel.
Safety
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Ensure that the correct adapter is used with adequate current rating and that the mains voltage is as
stated on the adapter.
Avoid ingress of water or particles into the transmitters or receiver
Use alkaline or NiMH batteries in the transmitters and remove if unused for long periods.
Observe the correct polarity when replacing batteries
Placement
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Keep all components out of direct sunlight and away from heat sources.
Do not place heavy objects on top of the receiver or transmitters
If rack-mounting, use rack ears provided and do not place heavy equipment above the receiver.
Keep the transmitters and receiver away from damp or dusty environments.
Cleaning
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Use a soft cloth with a neutral detergent to clean the body of the handheld transmitter and receiver.
Lightly damp sterile wipes may be used on the microphone grille for hygiene purposes
To avoid damage, do not use solvents to clean the components
171.970UK, 171.971UK User Manual
Receiver
1.
2.
3.
4.
5.
6.
7.
8.
9.
Channel A output volume control
Channel A Group/Channel setting
Channel A Group/Channel setting
Channel A Group/Channel set
LCD display
Channel B Group/Channel setting
Channel B Group/Channel setting
Channel B Group/Channel set
Channel B output volume control
up
down
up
down
10.
11.
12.
13.
14.
15.
16.
17.
IR sync sender
Power on/off switch
DC power in jack (5.5 x 2.1mm)
Antenna B connector (BNC)
Channel B balanced XLRM output
Mix A+B unbalanced 6.3mm jack output
Channel A balanced XLRM output
Antenna A connector (BNC)
Transmitters
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
LCD display
IR sync detector
On/off switch
Battery compartment
Antenna
On indicator
Off – Mute – On switch
3.5mm threaded jack socket
LCD display
On/off button
Battery compartment
171.970UK, 171.971UK User Manual
Setting Up
Insert the supplied AA batteries into each of the transmitters by carefully unscrewing the base of the
handheld microphone or opening the flap of the bodypack to reveal the battery compartment. Insert
the batteries (ensuring that + and - are the correct way round for each cell) and carefully replace
each cover.
For neckband or lavalier microphones, connect the 3.5mm jack into each of the bodypacks, screwing
the threaded jack securely into the socket.
The receiver antennas may be connected directly to the BNC connectors on the rear panel or
alternatively front-mounted on rack ears.
If the receiver is to be rack-mounted, place the supplied rack ears against each side of the receiver
and fix securely with 2 screws in each. These rack ears have holes for front-mounting the antennas
and BNC extension leads for fixing into the holes. These should be connected to the BNCs on the
rear panel, creating front sockets for the antennas to connect onto.
A choice of mixed output of both microphones on 6.3mm jack or individual balanced XLR outputs is
available on the rear panel of the receiver. Connect the jack or XLR (optional) leads to the relative
output connector(s), turn down the volume of any equipment (mixer, amplifier etc.) that the signal
will be fed into and then connect the jack or XLRs to the equipment.
Position the receiver within the best available line of sight to the transmitters and connect the DC
jack of the supplied power adaptor to the receiver and the plug-top to the mains outlet.
Operation
Turn microphone levels down on the receiver and switch on power on the front panel of the receiver.
Warning! - take care not to point microphones towards speakers – this can cause damaging feedback
(loud whistle or howling noise) – try to point microphones away from the speaker cabinets.
For the handheld version, move the switch on each handheld transmitter upward to switch it on and
the LCD display should light for a few seconds, showing the carrier frequency and battery status.
For bodypack transmitters, press and hold the front on/off button until the display lights up briefly,
ensuring that the Mute switch is off. Displays will show the current carrier frequency and battery
status. Transmitter frequencies should match those on the receiver. If not, see “Tuning” below.
Gradually increase the microphone level on the receiver, then increase the volume on the mixer or
amplifier until the sound from each microphone can be heard through the equipment.
171.970UK, 171.971UK User Manual
Tuning
For each microphone, the carrier frequency may be selected on the receiver unit by pressing the SET
button twice, which causes the GROUP label to flash in the display. The ▲ and ▼ buttons can be
used to select the Group from 1 to 7. Pressing the SET button again causes the CHANNEL label to
flash. The channel can be selected within a group using the ▲ and ▼ buttons. Tuning microphone A
to a particular channel will mean that the same channel cannot be selected for microphone B and
vice versa.
Groups 1 to 6 have between 3 and 5 preset channels, whilst Group 7 allows access to all 81 possible
frequencies. Depending upon any other radio signals in the vicinity of the operating environment,
one particular Group may offer a better channel spacing than another and this should be determined
by experimentation. If a particular group of frequencies results in poor reception or interference, try
another or use Group 7 to manually select carrier frequencies in 25kHz steps.
Once a channel is selected, press SET to accept the channel and press SET again to transmit the IR
sync signal (animated lines will show next to IR in the display). Hold the IR detector on the handheld
microphone or inside the bodypack battery compartment up to the IR sender on the main unit to
sync the carrier frequency to the transmitter.
In Use
Switching on each transmitter will open up the radio carrier frequency to the receiver and also send a
pilot tone frequency, which is not audible but is used by the receiver to open the audio channel. This
system helps to avoid any spurious radio frequencies interfering with the wireless microphone signal.
When the transmitter’s RF signal is recognized by the receiver, an RF meter will show the carrier
signal strength in the LCD display. Likewise, speaking into the microphone will send audio over this
carrier and an AF volume meter will show the audio level in the LCD display.
For neckband or lavalier microphones, there is also a mute switch on the top of each bodypack,
which can be used to temporarily cut the microphone output whilst maintaining the carrier
frequency. This may be useful to silence the mic whilst moving across the front of speakers or as a
standby setting.
In addition, each bodypack has a Gain adjustment inside the battery compartment to match the gain
level for the type of neckband or lavalier microphone that is connected to it.
If the wireless system is to be out of use for longer than a few seconds, it is preferable to switch the
transmitter off, which mutes the audio, deactivates the radio carrier signal and powers down the
transmitter. Be sure to turn down the volume of the mixer or amplifier before switching off the
receiver.
Unplug signal leads from the receiver and mixer or amplifier when moving or packing away.
If the system is not to be used for long periods of time, remove the batteries from the transmitters
and unplug the power adapter from the receiver and the mains outlet.
Folding away or removing the antennas can also help avoid damage when the system is not in use.
171.970UK, 171.971UK User Manual
Specifications
Power supply
Batteries
Carrier frequency
Channels
Tuning method
S/N ratio
THD
Frequency response
Image rejection
Range
Output impedance
Output level
Connectors
Dimensions - handheld transmitter
Dimensions - bodypack transmitter
Dimensions - receiver
Weight - handheld transmitter
Weight - bodypack transmitter
Weight - receiver
12-18Vdc 500mA adaptor (supplied)
4 x AA (included)
863.00 to 865.00MHz
81 tuneable UHF frequencies
Phase-locked loop
>105dB
<0.5% @ 1KHz
50Hz - 18kHz (±1dB)
85dB typical
60m (max)
2.2k ohms
Balanced: 0-400mv, unbalanced: 0-200mv
DC in, 2 x XLRM, 6.3mm jack, 2 x BNC antenna
265 x 49mmØ
110 x 67 x 24mm
409 x 190 x 44mm
330g (no battery)
75g (no battery)
1.37kg
Troubleshooting
“POWER” LED does not
light on receiver
“POWER” LED is lit but
no “RF” or “AF” LEDs
“POWER” and “RF” LEDs
are lit but no “AF” and
no sound
All LEDs lit but no sound
from mic
Microphone output is
very loud or distorted
Microphone output is
very low
1622
Ensure power adapter is connected to mains and working properly
Ensure receiver is switched on
Ensure transmitter is switched on
Check that transmitter is not out of reception range
Check that transmitter batteries are good / charged
Ensure that genuine Citronic RU series transmitters are being used.
Ensure transmitter and receiver frequencies are synced (see “Tuning”)
Check that transmitter switch is not in “MUTE” position
Ensure transmitter has good / charged batteries
Ensure there is no other nearby transmitter with the same frequency
Make sure receiver is properly connected to amplifier/mixer
Ensure that receiver and amplifier/mixer channel volumes are turned up
Turn down VOLUME on receiver
Reduce Gain on mixer / amplifier
Ensure that the XLR output is not fed to a line input
Turn up VOLUME on receiver
Increase gain on the mixer or amplifier
Ensure that the jack output is not fed to a low Z input
Check transmitter batteries
Disposal: The “Crossed Wheelie Bin” symbol on the product means that the product is classed as Electrical or
Electronic equipment and should not be disposed with other household or commercial waste at the end of its useful life.
The goods must be disposed of according to your local council guidelines.
Errors and omissions excepted.
Copyright© 2016. AVSL Group Ltd.
171.970UK, 171.971UK User Manual