Qtx V-series Vhf Wireless Systems User Manual

Qtx V-series Vhf Wireless Systems User Manual

V-SERIES
VHF Wireless Systems
User Manual

qtx V Series VHF Wireless Systems

Version 3.3

warning 2Caution: Please read this manual carefully before operating
Damage caused by misuse is not covered by the warranty

Introduction

Thank you for choosing the QTX Sound VHF-series wireless system. This professional wireless set provides a high-quality microphone with a VHF 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.
Contents:
Please take care when unpacking this product. Inspect for any damage and ensure you have the following components…

  • VHF wireless receiver
  • Mains power adapter
  • 6.3mm mono jack lead
  • 9V battery, PP3 (2 pieces for VH2, VN2 or VHN2)
  • Microphone / transmitter(s) – see table below
ModelStock codeMicrophone 1Microphone 2
VH1171.804UKHandheld transmitter
VH2171.816UK /171.817UKHandheld transmitterHandheld transmitter
VN1171.836UK /171.837UKNeckband mic. + beltpack
VN2171.818UK /171.819UKNeckband mic. + beltpackNeckband mic. + beltpack
VHN2171.810UK /171.811UKHandheld transmitterNeckband mic. + beltpack
VL1171.834UK /171.835UKLavalier mic. + beltpack

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 nit to dry out, and have checked by qualified personnel before further use. Avoid impact or heavy vibration to any of the components, dropping the microphone can cause capsule failure. No user-serviceable parts inside transmitter or receiver – refer servicing to qualified service personnel.

Safety

  • Ensure that the correct adapter is used with an adequate current rating and that the mains voltage is as stated on the adapter.
  • Avoid ingress of water or particles into the transmitter(s) or receiver
  • Use alkaline or NiMH batteries in the transmitter(s) and remove if unused for long periods.
  • Observe the correct polarity when replacing batteries

Placement

  • Keep all components out of direct sunlight and away from heat sources.
  • Do not place heavy objects on top of the receiver or transmitter(s)
  • If rack-mounting, secure the receiver to a 1U rack tray and do not place heavy equipment above the receiver.
  • Keep the transmitter(s) and receiver away from damp or dusty environments.

Cleaning

  • Use a soft cloth with a neutral detergent to clean the body of the microphone/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

Handheld Transmitter

qtx V Series VHF Wireless Systems - Handheld Transmitter

  1. Windshield
  2. Slide switch and LED
  3. Battery compartment cover

Beltpack Transmitter

qtx V Series VHF Wireless Systems - Beltpack Transmitter

  1. Volume control
  2. Slide switch and LED
  3. 3.5mm microphone input jack

Receiver Rear Panel

qtx V Series VHF Wireless Systems - Rear Panel

  1. Antennas
  2. DC power input
  3. 6.3mm jack output
  4. XLR output

Receiver Front Panel

qtx V Series VHF Wireless Systems - Front Panel

  1. Power ON/OFF switch
  2. Channel A volume control
  3. Channel A indicator LED
  4. Power indicator LED
  5. Channel B indicator LED
  6. Channel B volume control

Operation

For handheld transmitters, insert the supplied 9V batteries by carefully unscrewing the base to reveal the + and – terminals inside the microphone body, connect the battery (ensure + and – are the correct way around), and carefully screw the base back on. For beltpacks, slide the front half of the belt pack upwards just enough to reveal the battery compartment and position the supplied 9V battery inside (ensure + and – are the correct way around), and then slide the belt pack case together as before. Position the receiver within the best available line of sight to the transmitter(s) and connect the DC jack of the supplied power adapter to the receiver and the plug-top to the main outlet. Extend both antennas fully upwards and outwards slightly and switch the power on. Turn microphone level(s) down on the receiver. Note: for dual sets (with 2 transmitters), both microphones’ outputs will be mixed and fed to both XLR and jack outputs. Connect the jack or XLR (optional) lead to the receiver’s audio output connector, turn down the volume of any equipment (mixer, amplifier, etc.) that the signal will be fed into, and then connect the jack or XLR to the equipment. 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. Move the switch on the handheld or belt pack transmitter to the first notch (MUTE) – the LED should light momentarily (continuous dim LED indicates low battery). Move on another notch (ON) and gradually increase the microphone level(s) on the receiver, then increase the volume on the mixer or amplifier until the sound from the microphone can be heard through the equipment. During use, it may be useful for the reception of the microphone to be muted for a short period of time (e.g. to avoid feedback when walking across the front of a speaker or avoid handling noise when placing the microphone down momentarily or adjusting a neckband microphone). In these circumstances, it may be better to move the transmitter switch to the “MUTE” position, which maintains the radio frequency carrier signal but mutes the microphone input. When this switch is moved back to the “ON” position, the sound will be immediately restored without waiting for the radio signal to be reinstated. If the wireless system is not to be used for more than a few seconds, it is preferable to slide the transmitter switch to the “OFF” position, which mutes and deactivates the radio signal and powers down the transmitter. Be sure to turn down the volume of the mixer or amplifier and then switch 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 transmitter and unplug the power adapter from the receiver and the main outlet. Retracting the antennas can also help avoid damage when the system is not in use.

Specifications

General

Carrier typeVHF 173.8 — 175.0MHz
Frequency stability±0.005%
Maximum deviation±30kHz
Audio frequency response40Hz — 20kHz
Signal to noise ratio>85dB
Audio dynamic range>80dB
T.H.D.0.2′)/0
Maximum range50m
Operating temperature-100C to +500C

Receiver

Power supply10Vac 250mA (mains adapter supplied)
Audio outputsXLR, Jack
ControlsPower On/Off, Mic. Volume(s)
IndicatorsPower, Signal
Dimensions43 x 213 x 180mm
Weight340g

Handheld Transmitter (VH1, VH2, VHN2)

Capsule typeDynamic – cardioid response
Battery9Vdc, PP3
SwitchPower / Mute / On
RF emission10mW
Dimensions235 x 44mm0
1 Weight (without battery)176g

Beltpack Transmitter (VN1, VN2, VHN2, VL1)

Battery9Vdc, PP3
SwitchPower / Mute / On
Connector3.5mm mono jack
Compatible microphones171.855, 171.857,
RF emission10mW
Dimensions105 x 60 x 30mm
Weight (without battery)77g

NECKBAND MICROPHONE (VN1, VN2, VHN2)

Capsule typeCondenser – cardioid response
Power supply3V phantom from Beltpack
Connector3.5mm mono jack
Dimensions140 x 180 x 60mm
Weight25g

LAVALIER MICROPHONE (VL1)

Capsule typeCondenser – cardioid response
Power supply3V phantom from Beltpack
Connector3.5mm mono jack
Dimensions40 x 27 x 20mm
Weight20g

Frequency Chart

ModelStock codeMic 1 Mic 2 
VH1171.804UK173.8MHz
VH2171.816UK173.8MHz174.8MHz
171.817UK174.1MHz175.0MHz
VN1171.836UK173.8MHz
171.837UK174.5MHz
VN2171.818UK173.8MHz174.8MHz
171.819UK174.1MHz175.0MHz
VHN2171.810UK173.8MHz174.8MHz
171.811UK174.1MHz175.0MHz
VL1171.834UK173.8MHz
171.835UK174.5MHz

Troubleshooting 

“POWER” LED does not light on the receiverEnsure the power adapter is connected to mains and working properly
Ensure receiver is switched on
“POWER” LED is lit but no “SIGNAL” LEDEnsure transmitter is switched on
Check that transmitter is not out of reception range
Check that the transmitter battery is good / charged
LEDs are lit but no sound from the microphoneCheck if the transmitter switch is in the “MUTE” position
Check if the neckband or lavalier microphone is connected to the belt pack
Make sure receiver is connected to mixer/amplifier
Make sure that amplifier/mixer channel volume is turned up
Ensure transmitter has a good / charged battery
Check if there is another nearby transmitter with the same frequency
The microphone output is very loud or distortedTurn down GAIN ADJUST on the belt-pack transmitter
Turn down VOLUME on the receiver
Reduce Gain on mixer/amplifier
Ensure that XLR output is not fed to a Line input
The microphone output is very lowTurn up GAIN ADJUST on the belt-pack transmitter
Turn up VOLUME on the receiver
Increase Gain on mixer/amplifier
Ensure that Jack output is not fed to a Mic input
Check transmitter battery

qtx V Series VHF Wireless Systems - icon1Disposal: The “Crossed Wheelie Bin” symbol on the product means that the product is classed as Electrical or Electronic equipment and should not be disposed of 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.

Hereby, AVSL Group Ltd. declares that the radio equipment type 171.804UK, 171.810UK, 171.811UK, 171.816UK, 171.817UK, 171.818UK, 171.819UK, 171.834UK, 171.835UK, 171.836UK and 171.837UK are in compliance with Directive 2014/53/EU

The full text of the EU declaration of conformity for 171.804UK is available at the following internet address: http://www.avsl.com/assets/doc/1/7/171804UK.pdf The full text of the EU declaration of conformity for 171.810UK is available at the following internet address: http://www.avsl.com/assets/doc/1/7/171810UK.pdf The full text of the EU declaration of conformity for 171.811UK is available at the following internet address: http://www.avsl.com/assets/doc/1/7/171811UK.pdf The full text of the EU declaration of conformity for 171.816UK is available at the following internet address: http://www.avsl.com/assets/doc/1/7/171816UK.pdf The full text of the EU declaration of conformity for 171.817UK is available at the following internet address: http://www.avsl.com/assets/doc/1/7/171817UK.pdf The full text of the EU declaration of conformity for 171.818UK is available at the following internet address: http://www.avsl.com/assets/doc/1/7/171818UK.pdf The full text of the EU declaration of conformity for 171.819UK is available at the following internet address: http://www.avsl.com/assets/doc/1/7/171819UK.pdf The full text of the EU declaration of conformity for 171.834UK is available at the following internet address: http://www.avsl.com/assets/doc/1/7/171834UK.pdf The full text of the EU declaration of conformity for 171.835UK is available at the following internet address: http://www.avsl.com/assets/doc/1/7/171835UK.pdf The full text of the EU declaration of conformity for 171.836UK is available at the following internet address: http://www.avsl.com/assets/doc/1/7/171836UK.pdf The full text of the EU declaration of conformity for 171.837UK is available at the following internet address: http://www.avsl.com/assets/doc/1/7/171837UK.pdf

Errors and omissions excepted. Copyright© 2021. AVSL Group Ltd. Unit 2-4 Bridgewater Park, Taylor Rd. Manchester. M41 7JQ AVSL (EUROPE) Ltd, Unit 3D North Point House, North Point Business Park, New Mallow Road, Cork, Ireland.
V-Series VHF Wireless User Manual

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