Avsl QU4 User Manual - Page 5

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Operation

Switch on power to the receiver unit and check that the red power LED is lit on each channel (if not,

turn the VOLUME rotary control just past the zero point).

Move the switch on the first handheld or beltpack transmitter to the first notch (MUTE) – the LED

should light momentarily. Move on another notch (Fully ON) and 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. Repeat for the other 3 microphones.

(Note: if output is low from neckband microphones, it may be necessary to adjust Gain control inside

the beltpack unit).

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 transmitters

and unplug the power adapter from the receiver and the mains outlet. Folding away or removing the

antennae can also help avoid damage when the system is not in use.

Power supply

Batteries

Carrier frequency

Stability

S/N ratio

THD

Image rejection

Range

Output impedance

Output level

Connectors

Dimensions - handheld transmitter

Weight - handheld transmitter

Dimensions - beltpack transmitter

Weight - beltpack transmitter

Dimensions - receiver

Weight - receiver

Specifications

12 - 18Vdc 800mA adaptor (supplied)

8 x AA (included)

863.42, 864.99, 864.30 and 863.01MHz

10PPM

>105dB

<0.5% @ 1KHz

85dB typical

60m (max)

2.2k ohms

Balanced: 0-400mv, unbalanced: 0-200mv

DC in, 4 x XLRM, 6.3mm jack

243 x 48mmØ

238g (no battery)

205 x 68 x 25mm

76g (no battery)

483 x 44 x 225mm

3.8kg

171.840, 171.841, 171.842 User Manual