OPERATORS MANUAL W20R W10BT WL83 W10BT BODY-PACK TRANSMITTER W20R RECEIVER WL83 LAVALIER MICROPHONE
. . . ON ACQUIRING ONE OF THE FINEST WIRELESS MICROPHONE SYSTEMS AVAILABLE TODAY. DESIGNED FOR SIMPLE SETUP AND RELIABLE OPERATION, THIS SYSTEM SHOULD PROVIDE YEARS OF DEPENDABLE, TROUBLE-FREE SERVICE. WE STRONGLY URGE THAT YOU READ THIS MANUAL; IT WILL SAVE YOU TIME AND EFFORT, AND ENSURE OPTIMUM SYSTEM OPERATION. TABLE OF CONTENTS The Wireless Microphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
THE WIRELESS MICROPHONE . . . what it is, what it does . . . You’ve probably experienced this phenomenon with the FM radio in your car. A dropout location, most likely caused by buildings, mountains, or even telephone poles, causes your radio signal to drop to a low, noisy level -sometimes disappearing completely. This is multipath. The wireless microphone is actually a system consisting of a microphone, a transmitter, and a receiver.
through the use of linear-phase IF filtering and highquality audio circuitry. A high signal-to-noise ratio and wide dynamic range are necessary for noise-free, optimum performance. The Shure wireless uses complementary compression and expansion circuitry in the transmitter and receiver (companding) as well as pre-and de-emphasis to achieve a maximum S/N ratio of 98 dB A-weighted. Reflections, obstacles and interference in a given installation will dictate the system’s limits.
W10BT TRANSMITTER the Low Gain position for high-output microphones or musical instruments. Allows maximum modulation without clipping. ANTENNA: This is a flexible, 1/4-wave vertically polarized antenna approximately 30 cm (12 in.) in length and permanently attached to the bottom surface of the transmitter. For proper operation, the antenna must be in the vertical position; it cannot be coiled or bundled.
W20R RECEIVER FRONT PANEL POWER Push-Button Switch: Applies power from the external power converter or other well-filtered 13.5 Vdc (200 mA) sources to the receiver circuitry. An adjacent green POWER LED Indicator remains on while power is applied. (NOTE: With the power converter connected to a 115 Vac, 60 Hz source, 13.5 Vdc is present at the power converter output.) RF SIGNAL LED Indicator: This yellow indicator lights to show that the receiver is picking up the transmitted signal.
POWER 13.5 VDC NEGATIVE GROUND Coaxial Jack: This connector accepts power from the supplied power converter, or from any well-filtered 13.5 Vdc (200 mA) supply. tion to the 1/4-wave vertical antenna supplied with the W20R (or the optional WA250 5/8-wave antenna, which provides up to 3 dB additional RF gain). If the receiver is to be mounted in a shielded rack mount enclosure or other area which may interfere with RF wave reception, the 7.
SETUP AND CONNECTIONS equivalent) in the compartment. Observe the proper polarity: the large (negative) terminal in the large channel and the small (positive) terminal in the small channel. Operation with a full charged, heavy-duty, 8.4-volt nickelcadmium rechargeable battery is also permissible. IMPORTANT: Do not use a “conventional” 9-volt-sized nickel-cadmium battery; its 7.2-volt output will operate the transmitter for about 15 minutes.
below 7.25 volts and the battery should be replaced or recharged (nicad only). If the battery is tested periodically, the failure of the LED to light indicates approximately one hour-of battery life left (alkaline only). Polarity W ith the Shure WL83 or a Shure low- or highimpedance XLR-connector microphone connected through a WA310 cable, positive pressure on the microphone diaphragm results in positive voltage on pin 2 with respect to pin 3 of the receiver OUTPUT connector.
SETTING GAIN LEVELS With the system in place and connected, all units can now be turned on and the levels set to their optimum positions. TRANSMITTER Place the POWER Switch of the W20R receiver in the ON position. The green POWER LED will light. Turn the transmitter POWER ON/OFF Switch on. Observe the receiver yellow RF SIGNAL LED. It should be continually lit, indicating adequate RF signal strength for good transmission.
CHECKLIST/OPERATION CHECKLIST 3. The following checklist shows the status of your wireless microphone system at this point. If the following steps have been performed and the expected results obtained, the system can be put in operation. o Is the receiver properly located? Talk into the microphone (or play the connected musical instrument) and observe the receiver display for proper audio and RF indications. 4. Continue talking or playing and move around the performing area.
SPECIFICATIONS SYSTEM Antenna Input Impedance 50 ohms nominal RF Carrier Frequency 150 to 216 MHz (10 frequencies between 167.875 and 183.0 MHz offered; others available) Antenna 1/4 wavelength, 457 mm (18 in.) whip, UHF connector Power 13.5 Vdc nominal (negative ground); 200 mA external power converter supplied Dimensions 42.8 mm H (plus feet) x 190 mm W x 173 mm D (1-11/16 in. x 7-1/2 in. x 6-13/16 in.) (depth is 190 mm–7-1/2 in.
ANTENNAS TRANSMITTER The transmitter antenna is a permanently attached, flexible wire, 1/4-wave antenna. It has an omnidirectional transmission pattern (equally effective in all directions) and is designed to operate in a vertically polarized mode. This means that the antenna should hang downward during operation; coiling or wadding it to minimize visibility will reduce the system’s operating distance. RECEIVER The receiver antenna is a single-section, 1/4-wave whip antenna approximately 457 mm (18 in.
BATTERIES The battery should be removed if the transmitter malfunctions, or if it is to be stored for a long period. Most batteries have a protective jacket, but partly or completely exhausted batteries are more prone to leakage. Do not attempt to recharge replaceable (primary) batteries using “chargers”, heat or other methods. This may cause leakage or explosion. Do not disassemble batteries or dispose of them in fire.
TROUBLESHOOTING If you encounter any problems in the operation of your Shure Wireless Microphone System, first make certain you’ve followed the ABC’s of proper wireless microphone operation: Antennas - Make certain the transmitter antenna is dangling vertically. Make certain the receiver antenna is properly connected, located and mounted. Battery - Make certain the transmitter battery is fresh and of the right type.
ACCESSORIES 1/4-wave or the optional 5/8-wave receiver antenna to locate the antenna at a distance from the receiver. The following Shure Wireless System accessories are available through your Shure dealer. (Replacement parts can be ordered from Shure’s Service Department; information is available from Shure’s Service Department.) MODEL WA300 INSTRUMENT CABLE – This is a 1.2m (4 ft), single-conductor, shielded cable with a 1/4-inch phone plug on one end and a Switchcraft TA4F on the other.
FCC CERTIFICATION quency. Shure strongly urges the user to contact the appropriate telecommunications authority before choosing an ordering frequencies other than factory-preset frequencies. This recommendation applies to both original equipment purchase and subsequent frequency modification by Shure. The Shure Model W10BT transmitter is Type-Accepted under Federal Communications Commission Parts 90 and 74. The Shure Model W20R receiver is TypeAccepted under FCC Part 15.
222 HARTREY AVENUE, EVANSTON, ILLINOIS 60202-3696 U.S.A. Copyright 1986, Shure Brothers Inc. 27A2314 (FL) l TELEPHONE: (312)866-2200 l CABLE: SHUREMlCRO Printed in U.S.A.
