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Summary of Contents for Toa WT-870
- Page 1 OPERATING INSTRUCTIONS WT-870 DIVERSITY 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...
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Page 2: 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... - Page 3 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-870 or WTU- 871.
- Page 4 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.
- Page 5 If the microphone is equipped with a sensitivity control, adjust the control so that the level indicator lights yellow when spoken loud. 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...
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Page 6: Rack Mounting
Max. length External diameter (when YW-620 is used.) 6.1 mm (0.24") 48m (160ft.) 7.4 mm (0.29") 48~70m (160-230 ft. ) WT-870 WT-870 3 X 1 6 tapping screw (Supplied with the MB-14) MB-14 J-700 Fiber washer (Supplied with the MB-14) Mounting screw (Supplied with the MB-14) –... -
Page 7: Block Diagram
ADDITIONAL EXPLANATIONS 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. -
Page 8: Specifications
Weight Approx. 2.3kg (5.07lb.) Finish Panel: black Module and blank panel: resin (black) WT-870 equipped with WTU-870 or WTU-871 Receiving Frequency 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/UK) 202.1 MHz~203.7 MHz (DOC 60/AUSTRALIA) Receiving Sensitivity Under 20 dBµ...
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