Toa WT-770 Operating Instructions Manual

OPERATING INSTRUCTIONS

WIRELESS TUNER

WT-770

Please follow the instructions in this manual to obtain the optimum results from this unit.
We also recommend that you keep this manual handy for future reference.

TOA Corporation

GENERAL DESCRIPTION

The TOA WT-770 is a VHF high band tuner that permits simultaneous use of up to two optional
wireless tuner modules WTU-770 and WTU-771. To ensure its reliability, the WT-770 employs a

compressor/expander system noise reduction circuit to minimize the influence of hight-frequency

noise generated from digital equipment such as personal computers and word processors as well as

a combined noise/tone squelch circuit.

HANDLING PRECAUTIONS

Check for proper operating voltage of your tuner before use.

The model WT-770 "L" is intended for operation on 120V AC/60 Hz, and the WT-770 "H" for

220~240V AC/50 Hz.

When using a component rack, avoid installing the unit above heat generating equipment such as a

power amplifier.

To avoid severe electrical shocks and possible catastrophic damage, never open the unit nor touch

its internal components.

To clean the unit's exterior, wipe with a soft dry cloth. Never use benzine, thinner, or other solvents,

which may damage the painted parts of the unit.

FEATURES

A tone squelch prevents disturbing radio signals from producing noise when the wireless

microphone is not in use.

Modular construction facilities channel expansion and frequency changes.

Space-saving design and simultaneous dual channel operation.

Rack mountable. (Optional brackets required.)

Wide dynamic range and less susceptibility to high frequency noise in space thanks to a

compressor/expander circuit.

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NOMENCLATURE

[Front Panel]

Power Switch

Press this switch to turn power on. To turn power

off, press this switch again. Power Indicator lights

when the power is switched on.

Power Indicator

Tuner Receptacle

Insert an optional tuner module WTU-770 or WTU-

771.

Volume Control

Adjusts the output volume.

[Rear Panel]

Reception Indicator

Lights when the tuner receives the RF signal.

Level Indicator

Lights in proportion to the intensity of input into a

wireless microphone.

Frequency Label

Attach the label (supplied with the WTU-770 and

WTU-771)to the unit.

Blank Panel

Antenna Connector

(BNC, 75 , Phantom Power Ouptut : 9V DC)

Connects to an optional wireless antenna, and

supplies DC power to the YW-620 having a built-in

booster amplifier.

Audio Output XLR Connector

( – 6 0 dBV, Output Impedance : 600 , Balanced)
Provides individual outputs of built-in tuner

modules.

Mixing Output

Line Output : 0 dBV, Output Impedance : 10

Unbalanced

Mic output : – 6 0 dBV, output impedance : 600 ,
Unbalanced

Mixes built-in tuner module outputs.

Mixing Output Level Selector

Switches mixing output levels.

Line Output : Connects to the line (AUX) input

terminal of connected component.

Mic Output : Connects to the mic input terminal of

connected component.

DC IN

(12V

DC)

Power input terminal for external DC power supply.

AC Inlet (3 pins)

k ,

Power input terminal for AC power supply. Use the

supplied power cord.

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