Verizon WT-781 User's Manual
Contents
1. the following modules of 900 series 5 Eo G har l Sa 4 CT 900 series module AC DC adaptor inaina 900 series amplifiers etc ea CAR 0000 E INSTALLATION PRECAUTIONS Install the unit at the location accessible to the wall outlet easily Install the tuner away from high frequency noise generating equipment such as fluorescent lamps and personal computers whenever possible Avoid installing a receiving antenna in close proximity to the steel frames of the building or lockers The clearance between the antenna and the wall needs to be at least 30 cm 1 foot E ADDITIONAL EXPLANATIONS pe 1 Squelch Circuit In a receiver employing only a noise or carrier squelch the squelch circuit is actuated and provides the output whenever the receiver receives the same RF carrier as a receiving frequency This causes even a disturbing radio signal to be received provided its frequency is the same as the receiving frequency As a result it can happen that sound is suddenly heard from the speaker due to disturbing radio signal even when the wireless microphone s power switch is left OFF The squelch circuit of TOA s wireless systems consists of both the tone and noise squelches and is not actuated if only same RF carrier as the receiving frequency is received It is so designed as to be actuated and output a signal only when the received RF carrier contains a very exact pr2. 0 C 14 F 122 F 140 X 31 X 108 4mm 5 51 X 1 22 X 4 27 Approx 260g 0 572 Ib Dark gray Overall System Performance WT 780 WT 781 WM 270 WM 271 Transmission Distance Dynamic Range SNR Distortion 30 60m 100 200 feet Better than 90 dB 102 dB A weight 60 dB yu V 15 kHz Deviation Better than 95 dB 102 dB A weight 60 dB y V 40 kHz Deviation Under 1 Specifications are subject to change without notice Accessories AC DC adaptor AD 780 120V AC 60 Hz USA CANADA AD 781 230 240V AC 50 Hz UK AD 782 240V AC 50 Hz AUSTRALIA Operating instructions TOA Corporation A KOBE E 133 07 057 4A
3. A d TOA OPERATING INSTRUCTIONS WIRELESS TUNER les a gt 4 TOA WIRELESS TUNER 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 E GENERAL DESCRIPTION The TOA WT 780 WT 781 is a VHF high band tuner employing a compressor expander system noise reduction circuit to minimize the influence of high frequency noise generated from digital equipment such as personal computers and word processors It also features a dual noise and tone squelch system that allows the receiver to receive radio signals only from the microphone E HANDLING PRECAUTIONS Check for proper operating voltage of your tuner before use Supplied AC DC adaptor must be used 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 E FEATURES A tone squelch prevents disturbing radio signals from producing noise when the wireless microphone is not in use Wide dynamic range and less susceptibility to high frequency noise in space thanks to a compressor expander circuit Space saving design and reliabl
4. e determined tone frequency component Therefore disturbing radio signals are rejected and the speaker can be kept completely quiet when the wireless microphone s power switch is set to OFF ensuring reliable use in every application 2 Frequency Indicators Component frequency ratings are expressed in combinations of alphabetic and numeric characters with letters substituted for all numbers to the left of the 1 MHz digit For example C 160 MHz F 190 MHz D 170 MHz G 200 MHz E 180 MHz H 210 MHz All numbers to the right of the 10 MHz digit are still expressed as numerals Therefore D5432 175 432 MHz G7654 207 654 MHz E SPECIFICATIONS WT 780 for USA UK AUSTRALIA WT 781 for CANADA Power Requirements Power Consumption DC Input Receiving Frequency Receiving Sensitivity Squelch Sensitivity Frequency Response Residual Noise Antenna Audio Output Operating Temperature Dimensions Weight Finish 120V AC 60 Hz 230 240V AC 50 Hz 240V AC 50 Hz Supplied AC DC adaptor must be used 3W 12V DC 110 mA max 169 445 MHz 171 905 MHz FCC Part 90 USA 174 250 MHz 215 250 MHz FCC Part 74 USA D O C CANADA 173 8 MHz 175 0 MHz MPT1345 UkK 202 1 MHz 203 7 MHz DOC 60 AUSTRALIA Under 20 dB u V S N 75 dB Deviation 15 kHz S N 80 dB Deviation 40 kHz Approx 14 dB u V 100Hz 12kHz 2dB Less than 30 u V 8 u V A weight Telescopic antenna 10dBV 1082 unbalanced 10 C 5
5. e operation E NOMENCLATURE Top View at BORTA er cs J U Peak Indicator Lights when excessive input into wireless microphone is input Reception Indicator Lights when the unit receives a radio signal from the microphone Power Indicator Lights when the power is supplied Front View 9 Volume Control Adjusts the output volume Audio Output Connector 10 dBV Output Impedance 10 k 2 unbalanced Side View g lt 7 DC IN 12V DC Input terminal for external power supply Connect the supplied AC DC adaptor to this connector pane A E OPERATIONS 2 Set up the antenna vertically and stretch to its full length Da lt a K 1 Connect the AC DC adaptor to the DC input terminal and wall outlet CO 3 Set the microphone power switch to ON y The reception indicator lights o o J h E OGG 4 Adjust the volume control Note on peak indicator When the peak indicator lights frequently your voice can be distorted at a microphone circuit In such cases move your mouth away from the microphone so that the peak indicator lights at a maximum level If the microphone is equipped with a sensitivity control adjust the control so that the level indicator lights when spoken loud E CONNECTIONS When using with the 900 series amplifiers connect the output of WT 780 WT 781 with
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