OPERATORS MANUAL W25DR W10BT WL83 W10BT BODY-PACK TRANSMITTER W25DR DIVERSITY 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Frequency Bands . . . . . . . . . . .
THE WIRELESS MICROPHONE . . . what it is, what it does . . . 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. The microphone is an electroacoustic transducer-a device which converts sound waves (voice, musical instruments, etc.) to electrical inpulses, which are sent to the transmitter.
On Feedback..... The use of a wireless microphone doesn’t eliminate the possibility of annoying feedback. Feedback control is generally achieved by careful placement of the speakers relative to the microphone, minimum levels necessary for the desired sound, good microphone technique, and proper equalization of the sound system. Transmitter Range..... The FCC-required low power output of the transmitter means that its distance from the receiver should be kept as short as possible.
W10BT TRANSMITTER 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. the Low Gain position for high-output microphones or musical instruments. Allows maximum modulation without clipping.
W25DR 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 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 always present at the power converter output.) tion is shown by illumination of the green portion of the display, with occasional excursions into the yellow.
dropout-free performance in diversity operation. Additional coaxial cables (WA280) can be connected for greater total antenna separation if necessary. dicates a marginal signal condition; and green indicates an acceptable level. Full-scale indication is desirable for best signal-to-noise performance, but changes throughout the green portion of the display will still result in good operation.
SETUP AND CONNECTIONS connecting cable and connect between the W25DR OUTPUT Connector and the mixer or amplifier microphonelevel input. Make certain the receiver MlC/LlNE Switch is in the MIC position. Adjust the levels as described under Level Adjustment. UNPACKING Unpack all units and parts of the Wireless Microphone System. If possible, retain packaging in the event of returning a unit for repair.
Operation with a full charged, heavy-duty, 8.4-volt nickelcadmium rechargeable battery is also permissible. IMPORTANT: Do not use a “conventional” g-volt-sized nickel-cadmium battery; its 7.2-volt output will operate the transmitter for about 15 minutes. Carbon-zinc batteries will also result in diminished operating life (about 1 hour).
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 W25DR receiver in the ON position. The red POWER LED will light. Turn the transmitter POWER ON/OFF Switch on. Observe the receiver RF SIGNAL LEVEL display: one of the green LED segments should light, indicating adequate RF signal strength for good transmission.
AUDIO OUTPUT SETTINGS If the receiver output is to be fed to headphones, 600-ohm line devices, effects units or guitar amplifiers using the front-panel AUXILIARY OUTPUT Jack, set the 3-position IMPEDANCE Switch for the type of equipment to be used. Then rotate the LEVEL Control for the desired signal level as monitored on the headphones or as observed in the following equipment. differences in input level settings.
CHECKLIST/OPERATION In most cases, the problem of weak RF signal strength is also indicated by audible evidence: signal dropout, either continuous or intermittent, or noisy, distorted operation. The condition is generally caused by poor antenna location, RF signal blocking, or operation beyond the system capability. Refer to the Troubleshooting section for remedies. Normal operation is shown by illumination of a green LED on the RF SIGNAL LEVEL display (see Figure 6).
SPECIFICATIONS 600 ohms . . . . . . . . . . . 40 mW maximum 10 kilohms . . . . . . . . . . . . . . . 0.2 mW maximum Antenna Input Impedance 50 ohms nominal Antenna 5/8 wavelength whip, UHF connector, length: 991 mm (39 in.) (150 to 176 MHz); 762 mm (30 in.) (176 to 216 MHz) Power 13.5 Vdc nominal (negative ground); 200 mA external power converter supplied Dimensions 88.9 mm (incl. feet) x 209 mm W x 211 mm D (3-1/2 in. x 8-1/4 in. x 8-5/16 in. ) (depth is 238 mm-9-3/8 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 antennas are three-section, 5/8-wave whip antennas approximately 762 mm (30 in.
(WA260) permits mounting the antenna to a wall, scenery flat, or top of file cabinet (never the side). The insulated hook at the end of the antenna allows it to be hung from any nonmetallic rope or other line. (IMPORTANT: The antenna must not be mounted on or next to metal beams, metal-studded walls, equipment racks, etc., nor hung from wire cables; this can result in detuning the antenna and losing as much as 20 to 30 dB in RF signal strength.
BATTERIES Careful transmitter battery selection, installation, use and care will help avoid problems in wireless microphone use. The most dependable, long-lived batteries at this time are the manganese-alkaline, or alkaline, types. In addition to offering the longest expected operating life, they are commonly available. One small word of caution about alkaline batteries: they are not all the same size.
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: Make certain the transmitter antenna is dangling vertically. Make certain the receiver antennas are properly connected, located and mounted. Make certain the transmitter battery is fresh and of the right type.
ACCESSORIES 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 WA280 COAXIAL ANTENNA CABLE - Identical to the coaxial antenna cable supplied with the W25DR receiver, the WA280 can be used as a replacement or to extend the diversity antenna an additional 7.6m (25 ft).
FCC CERTIFICATION quency. Shure strongly urges the user to contact the appropriate telecommunications authority before choosing and 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 W25DR receiver is TypeAccepted under FCC Part 15.
222 HARTREY AVENUE, EVANSTON, ILLINOIS 60202-3696 U.S.A. • TELEPHONE: (312) 866-2200 • CABLE: SHUREMlCRO Copyright 1986, Shure Brothers Inc. 27A2315 (FL) Printed in U.S.A.
