AVSL 171.840-171842 QU4 - Manual (Page 5)

171.840, 171.841, 171.842 User Manual
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.
Specifications
Power supply 12 - 18Vdc 800mA adaptor (supplied)
Batteries 8 x AA (included)
Carrier frequency 863.42, 864.99, 864.30 and 863.01MHz
Stability 10PPM
S/N ratio >105dB
THD <0.5% @ 1KHz
Image rejection 85dB typical
Range 60m (max)
Output impedance 2.2k ohms
Output level Balanced: 0-400mv, unbalanced: 0-200mv
Connectors DC in, 4 x XLRM, 6.3mm jack
Dimensions - handheld transmitter 243 x 48mmØ
Weight - handheld transmitter 238g (no battery)
Dimensions - beltpack transmitter 205 x 68 x 25mm
Weight - beltpack transmitter 76g (no battery)
Dimensions - receiver 483 x 44 x 225mm
Weight - receiver 3.8kg