VIZIO WT-870 User's Manual
Contents
1. O000900 2000 00000 5j Do o LE o E INSTALLATION PRECAUTIONS Install the tuner antennas and antenna cable away from high frequency noise generating equipment such as fluorescent lamps and personal computers whenever possible Avoid installing receiving antennas in close proximity to metal stuff such as steel frames and lockers Install receiving antennas at least 30cm 1 foot away from the wall The distance between two antennas must be over 3m 10 feet If both are installed in the same location the diversity reception is not effective Coaxial cable s high frequency loss increases as frequencies become higher Keep the connection cable between antenna and tuner as short as possible Maximum Antenna Cable Length Cable type External diameter ee RHEA is used RG 59 U 6 1 mm 0 24 48m 160ft RG 6U 7 4 mm 0 29 48 70m 160 230 ft Mi RACK MOUNTING Optional mounting kit is required for rack mounting Remove rubber supporters from the equipment 1 Mounting one unit in a rack Optional mounting kits MB 14 and BK 014B are to be used Poi tapping SCrOW z3 X16 tapping screw included in BK 014B WT 870 a 3X 16 tapping screw y Supplied with the MB 14 a aan D E ig Fiber washer Supplied with the MB 14 Mounting screw Supplied with the MB 14 2 Mounting two units in a rack Optional mounting kits MB 14 and J 700 are to be used2. 3X16 tapping screw WT 870 3X16 tapping screw Supplied with the MB 14 MB 14 Flat head screw M3X6 J 700 included in J 700 Fiber washer Supplied with the MB 14 Mounting screw Supplied with the MB 14 WE ADDITIONAL EXPLANATIONS E BLOCK DIAGRAM 1 Diversity Reception Conventional single antenna system receivers have often produced null spots where a radio signal is suddenly lost during its reception The diversity reception method enables stable signal reception all the time 2 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 pre determined tone frequency component Therefore disturbing radio signals are rejected and the speaker can be kept completely quiet when the wireless microphone s
3. level indicator lights depending on the intensity of input into the wireless microphone regardless of the volume control setting When the indicator lights red frequently your voice can be distorted at a microphone circuit In such cases move your mouth away from the microphone so that the indicator lights yellow at a maximum level This is not needed if the indicator lights red only occasionally If the microphone is equipped with a sensitivity control adjust the control so that the level indicator lights yellow when spoken loud Mi CONNECTIONS When using with the mixing console connect the output of WT 870 to XLR type input connectors of the the mixing console Wall mount dipole Mobile wireless Whip wireless Wall mount dipole Mobile wireless Whip wireless wireless antenna antenna antenna wireless antenna antenna antenna YW 620 YW 610 YW 600 YW 620 YW 610 YW 600 ca aa ae ae YW 600 Direct mount type to the tuner Requires no antenna cable YW 610 Mobile type antenna Antenna cable must be under 10m 33 feet in length YW 620 Fixed mount type antenna having a built in booster amplifier Wireless microphones can be used in wide ranges Wary O O AC IN r e m O C9 ie E DC ING Connector PA Fa ay COLD ee HO 4 eo0000c0 0000000 o Hatt Mixer etc Q eo 00 0000000000 oo0oo0oo0 0 o
4. B 4 A OA OPERATING INSTRUCTIONS DIVERSITY WIRELESS TUNER WT 870_ OO n lt e 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 Mi GENERAL DESCRIPTION Designed for virtual elimination of problem null spots or dropouts momentary loss of radio signal reception the TOA WT 870 is a diversity tuner that permits simultaneous use of up to two optional wireless tuner modules WTU 870 and WTU 871 To ensure its reliability the WT 870 employs 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 as well as a combined noise tone squelch circuit W HANDLING PRECAUTIONS Check for proper operating voltage of your tuner before use The model WT 870 L is intended for operation on 120V AC 60 Hz and the WT 870 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 W FEATURES e Diversity rec
5. eption system minimizes the effects of fading during reception of a radio signal 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 E NOMENCLATURE Front Panel i 10000 0 CH C 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 2 Power Indicator Tuner Receptacle Insert an optional tuner module WTU 870 or WTU 871 4 Volume Control Adjusts the output volume Rear Panel Reception Indicator The left lamp lights when antenna A receives a signal The right lamp lights when antenna B receives a signal Level Indicator Lights in proportion to the intensity of input into a wireless microphone T Frequency Label Attach the label supplied with the WTU 870 and WTU 871 to the unit Blank Panel a7 a Oeg Ke O Antenna Connector BNC 752 Phantom Power Ouptut 9V DC Connects t
6. ncy Receiving Sensitivity Squelch Sensitivity Frequency Response Residual Noise 169 445 MHz 171 905 MHz FCC Part 90 USA 174 250 MHz 215 250 MHz FCC Part 74 USA D 0 C CANADA 173 8 MHz 175 0 MHz MPT1345 Uk 202 1 MHz 203 7 MHz DOC 60 AUSTRALIA Under 20 dBu V S N 75 dB Deviation 15 kHz S N 80 dB Deviation 40 kHz Approx 14 dB u V 100 Hz 12kHz 2dB Less than 30 V 8 up V A weight Overall System Performance WT 870 WTU 870 WTU 871 WM 280 WM 281 WM 290 WM 291 Transmission Distance Dynamic Range SNR Distortion 30 100m 100 330 feet Better than 90 dB 102 dB A weight 60 dB y V 15 kHz Deviation Better than 95 dB 102 dB A weight 60 dB u V 40 kHz Deviation Under 1 Specifications are subject to change without notice Accessories Power cable DC input connector Color identification labels Operatinginstructions Warranty card Z TOA Corporation a KOBE JAPAN TOA 133 07 074 90
7. o an optional wireless antenna and supplies DC power to the YW 620 having a built in booster amplifier Audio Output XLR Connector 60 dBV Output Impedance 6000 Balanced Provides individual outputs of built in tuner modules 1 Mixing Output Line Output 0 dBV Output Impedance 10k Unbalanced Mic Output 60 dBV output impedance 6000 unbalanced Mixes built in tuner module outputs 2 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 43 DC IN 12V DC Power input terminal for external DC power supply 4 AC Inlet 3 pins Power input terminal for AC power supply Use the supplied power cord E TUNER MODULE INSTALLATION AND REPLACEMENT CAUTION These servicing instructions are for use by qualified personnel only To avoid electric shock do not perform any servicing other than that contained in the Operating Instructions unless you are qualified to do so Refer all servicing to qualified service personnel 1 New Installation 1 Press the stopper of the tuner 3 Open the tuner panel 4 Insert a tuner module panel with a screw driver 2 Pull the tuner panel towards you while pressing the stopper 5 After checking to confirm the 6 Attach the frequency label tight connection of the tuner supplied with
8. power switch is set to OFF ensuring reliable use in every application 3 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 DISTRIBUTER 1 VR1 CH 1 OUTPUT rene See BALANCED XLR TYPE ANT IN 5 1 TUNER 2 VR2 CH 2 OUTPUT i 60 dBV 600 Q BALANCED XLR TYPE ANT IN 2 0 dBV 10kQ MIXED o O OUTPUT DISTRIBUTER 2 eer Phone Jack ATT 60 dBV 600 Q E SPECIFICATIONS WT 870 Power Requirements Power Consumption DC Input Antenna Input Audio Output Mixing Output Operating Temperature Dimensions Weight Finish 120V AC 60 Hz L version 220 240V AC 50 Hz H version 10W when 2 WTU 870 s or WTU 871 s are mounted 12 18V DC 400mA max 75 Q BNC Power supplied to antenna 9V DC 30mA max 60 dBV 6000 balanced LINE 0 dBV 10k Q unbalanced MIC 60 dBV 600 Q unbalanced 10 C 50 C 14 F 122 F 210X47 5X280mm 8 3 X1 9 X1 0 Approx 2 3kg 5 07Ib Panel black Module and blank panel resin black WT 870 equipped with WTU 870 or WTU 871 Receiving Freque
9. the tuner module panel connector fit the tuner to the assigned space panel in place After the frequency label has been attached make sure to attach a color identification label on it Color Identification Label Attach one of the supplied labels of different colors to the tuner s panel Both the tuner and its corresponding hand held microphone have to be marked with the same color for easy association with their frequencies 2 Installation Expansion The tuner module WTU 870 or WTU 871 and the tuner panel WP 860 are required 1 Remove the blank panel of the unit 2 Attach the unit s connector to the tuner panel connector 3 Insert a tuner module WTU 870 or WTU 871 4 Fit the tuner panel in place 5 Attach the frequency label supplied with the tuner module 3 Replacement Pull out the tuner module with long nose radio pliers Note Be sure to refer the installation and replacement to qualified service personnel Mi OPERATIONS 3 Adjust the volume control of the module of which reception indicator lights meS j fe ea J 0000 2 Set the wireless microphone s power switch to ON The 1 Switch the power on corresponding module s reception indicator lights Out The power indicator lights of two reception indicators for antenna A and B one corresponding to the antenna receiving the strongest radio signal lights Note on level indicator The
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