V-SERIES

VHF Wireless Systems

User Manual

Version 2.0

Caution: Please read this manual carefully before operating

Damage caused by misuse is not covered by the warranty

Introduction

Thank you for choosing the QTX Sound VHF-series wireless system. This professional wireless set provides a high quality microphone with 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

Model Stock code Microphone 1

VH1

VH2

171.804 / 171.805

171.816 / 171.817

Handheld transmitter

Handheld transmitter

Microphone 2

-

Handheld transmitter

- VN1 171.836 / 171.837

VN2 171.818 / 171.819

VHN2 171.810 / 171.811

VL1 171.834 / 171.835

Neckband mic. + bodypack

Neckband mic. + bodypack

Handheld transmitter

Lavalier mic. + bodypack

Neckband mic. + bodypack

Neckband mic. + bodypack

-

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 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 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

QTX VHF Wireless User Manual

Handheld Transmitter

1. Windshield

2. Slide switch and LED

3. Battery compartment cover

Bodypack Transmitter

Receiver Rear Panel

Receiver Front Panel

1. Antennae

2. Power adapter input

3. 6.3mm jack output

4. XLR output

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

QTX VHF Wireless User Manual

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 round) and carefully screw the base back on.

For bodypacks, slide the front half of the bodypack upwards just enough to reveal the battery compartment and position the supplied 9V battery inside (ensure + and - are the correct way round) and then slide the bodypack 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 mains outlet. Extend both antennae 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 bodypack 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 mains outlet. Retracting the antennae can also help avoid damage when the system is not in use.

QTX VHF Wireless User Manual

Specifications

Carrier type

Frequency stability

Maximum deviation

Audio frequency response

Signal to noise ratio

Audio dynamic range

T.H.D.

Maximum range

Operating temperature

Power supply

Audio outputs

Controls

Indicators

Dimensions

Weight

Capsule type

Battery

Switch

RF emission

Dimensions

Weight (without battery)

Battery

Switch

Connector

Compatible microphones

RF emission

Dimensions

Weight (without battery)

Capsule type

Power supply

Connector

Dimensions

Weight

Capsule type

Power supply

Connector

Dimensions

Weight

VHF 174.1–201.4MHz

±0.005%

±30kHz

40Hz – 20kHz

>85dB

>80dB

≤0.2%

50m

-10ºC to +50ºC

Receiver

10Vac 250mA (mains adapter supplied)

XLR, Jack

Power On/Off, Mic. Volume(s)

Power, Signal

43 x 213 x 180mm

340g

Handheld Transmitter (VH1, VH2, VHN2)

Dynamic - cardioid response

9Vdc, PP3

Power / Mute / On

<10mW

235 x 44mmØ

176g

Bodypack Transmitter (VN1, VN2, VHN2, VL1)

9Vdc, PP3

Power / Mute / On

3.5mm mono jack

171.855, 171.856, 171.857

<10mW

105 x 60 x 30mm

77g

NECKBAND MICROPHONE (VN1, VN2, VHN2)

Condenser - cardioid response

3V phantom from Bodypack

3.5mm mono jack

140 x 180 x 60mm

25g

LAVALIER MICROPHONE (VL1)

Condenser - cardioid response

3V phantom from Bodypack

3.5mm mono jack

40 x 27 x 20mm

20g

QTX VHF Wireless User Manual

Frequency Chart (for AU or NZ version, see EU)

Model Version Stock code Mic 1 Mic 2

VH1

VH2

VN1

VN2

VHN2

VL1

EU versions

UK versions

EU versions

UK versions

EU versions

UK versions

EU versions

UK versions

EU versions

UK versions

EU versions

UK versions

171.804EU 197.32MHz

171.805EU 198.25MHz

171.804UK 173.8MHz

171.805UK 174.5MHz

171.816EU 197.32MHz 200.18MHz

-

-

-

-

171.817EU 198.25MHz 201.4MHz

171.816UK 173.8MHz

171.817UK 174.1MHz

174.8MHz

175.0MHz

171.836EU 197.32MHz

171.837EU 199.82MHz

171.836UK 173.8MHz

171.837UK 174.5MHz

171.818EU 197.32MHz 200.18MHz

171.819EU 198.25MHz 201.4MHz

171.818UK 173.8MHz 174.8MHz

-

-

-

-

171.819UK 174.1MHz 175.0MHz

171.810EU 197.32MHz 200.18MHz

171.811EU 198.25MHz 201.4MHz

171.810UK 173.8MHz 174.8MHz

171.811UK 174.1MHz

171.804EU 197.32MHz

175.0MHz

-

171.805EU 199.82MHz

171.804UK 173.8MHz

171.805UK 174.5MHz

-

-

-

Troubleshooting

“POWER” LED does not light on receiver

“POWER” LED is lit but no “SIGNAL” LED

LEDs are lit but no sound from microphone

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 battery is good / charged

Check if transmitter switch is in “MUTE” position

Check if neckband or lavalier microphone is connected to bodypack

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

Turn down GAIN ADJUST on bodypack transmitter

Turn down VOLUME on receiver

Reduce Gain on mixer / amplifier

Ensure that XLR output is not fed to a Line input

Turn up GAIN ADJUST on bodypack transmitter

Turn up VOLUME on receiver

Increase Gain on mixer / amplifier

Ensure that Jack output is not fed to a Mic input

Check transmitter battery

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© 2014. AVSL Group Ltd.

QTX VHF Wireless User Manual