INSTRUCTION MANUAL WM Watertight Transmitter and Remote Controls With Digital Hybrid Wireless® Technology US Patent 7,225,135 Fill in for your records: Serial Number: Purchase Date: Rio Rancho, NM, USA www.lectrosonics.
WM 2 LECTROSONICS, INC.
Watertight Transmitter Introduction The WM transmitter is designed to resist damage when used in wet or dusty conditions and also offer a comprehensive feature set that makes it equally at home in film and television production and on stage. A solid machined aluminum housing with a corrosion resistant finish hosts dual battery compartments, a moisture sealed control panel with backlit LCD and enlarged membrane switches.
WM General Technical Description Servo Bias Input No Pre-Emphasis/De-Emphasis The voltage and current requirements of the wide variety of electret microphones used in professional applications has caused confusion and compromises in the wiring needed for wireless transmitters. To address this problem, the unique Servo Bias input circuit provides an automatically regulated voltage over a very wide range of current for compatibility with all microphones.
Watertight Transmitter Signal Encoding and Pilot Tone In addition to controlling the limiter, the DSP also encodes the digitized audio from the A/D converter and adds an ultrasonic pilot tone to control the squelch in the receiver. A pilot tone squelch system provides a reliable method of keeping a receiver output muted (audio mute) even in the presence of significant interference.
WM Controls and Functions Modulation LEDs LCD UP Arrow Audio Input Jack Battery Compartment Caps DOWN Arrow PWR LED AUDIO Button FREQ Button LCD Screen The display is a highly visible backlit LCD with screens for making all setup and level adjustments. The transmitter can be powered up with or without the RF output turned on. With the RF output turned off, all adjustments can be made without creating interference for other wireless systems in the vicinity.
Watertight Transmitter About Batteries Battery Compartments The transmitter is powered by two AA batteries. Lithium batteries are recommended for longest life, which typically provides over 7.5 hours of operation at room temperature with the output set to 250 mW. At 50 mW, the runtime is typically over 14 hours with lithium batteries. The battery compartments are a rugged, straightforward design with a recessed entry that captures the O-ring on the cap.
WM Operating Instructions Power Up and Boot Sequence Simultaneously press and hold the AUDIO and FREQ buttons until the startup count is completed. The screen will display a count from 1 to 3 as the unit boots up, then it switches to the Audio screen. As the unit turns on, the Modulation LEDs and PWR LED all glow red, then green, and then revert to normal operation.
Watertight Transmitter Audio LF Roll-off and Gain Output Power Extended operating range and increased immunity to dropouts can be selected at the expense of shorter battery life by setting the output power to 250 mW. Reduced output power will decrease power consumption and extend battery life at the expense of operating range and immunity to dropouts. Use the UP and DOWN arrows to select the desired output power. NOTE: See the specifications for typical operating times for each power level.
WM Warning: If the wireless system is connected to a live sound system, turn the sound system level down first to avoid severe feedback. 1) Position the microphone in the location where it will be used in actual operation. 2) Place the transmitter in the “standby” mode or turn it on for normal use. 3) While speaking or singing into the microphone at the same voice level that will be used, observe the LEDs on the control panel.
Watertight Transmitter Enable/Disable Remote Control Functions To enable the transmitter to respond to signals from the RM remote control unit, use the UP and DOWN arrow buttons to select rc on on the setup screen. To disable this function, select rc oFF. Preventing Corrosion Whenever the transmitter has been exposed to moisture or perspiration, follow the instructions below to minimize the risk of corrosion. DRY THE UNIT BEFORE REMOVING THE MICROPHONE CONNECTOR OR BATTERY CAPS.
WM Optional RM Remote Control The RM unit gives you remote control of SM Series transmitters using an audible tone delivered to the microphone. The panel layout is the same as the transmitters. Simply set the desired value or mode on the LCD, then press the send button to set the transmitter to the same setting or mode. Powering the RM on and off To turn the RM on or off, press the AUDIO and FREQ buttons together briefly.
Watertight Transmitter Operating Notes • The sensitivity to the remote control varies with the transmitter’s audio level setting and the microphone used, but it is always possible to make it work with a sufficiently loud remote signal at close range. • If the transmitter is configured to respond to the remote control, it will do so even if the buttons are locked. • When the transmitter is asleep, it can only be awakened by the remote control, or by removing and reinserting the battery.
WM Troubleshooting Before going through the following chart, be sure that you have a good battery in the transmitter. It is important that you follow these steps in the sequence listed. SYMPTOM POSSIBLE CAUSE TRANSMITTER PWR LED OFF 1) Battery is inserted backwards or dead. 2) Transmitter not powered up. (See Operating Instructions, Power UP and Boot Sequence.
Watertight Transmitter SYMPTOM HISS AND NOISE -- AUDIBLE DROPOUTS 1) 2) 3) 4) 5) POSSIBLE CAUSE Transmitter gain (audio level) far too low. Receiver antenna missing or obstructed. Transmitter antenna broken or missing. Operating range too great. Signal interference. Turn off transmitter. If receiver’s signal strength indicator does not drop to nearly zero, this indicates an interfering signal may be the problem. Try a different operating frequency.
WM Accessories and Replacement Parts Belt Clip TBA WPMC-3 Watertight connector kit, 3 piece, to terminate lavaliere microphones for use with the WM transmitter. WPMC-10 Watertight connector kit,10 piece, to terminate lavaliere microphones for use with the WM transmitter. Battery Cap TBA Battery Cap Lanyard TBA O-ring for Battery Cap TBA 16 LECTROSONICS, INC.
Watertight Transmitter Antenna Length by Block Lectrosonics UHF transmitter antennas follow the color code specifications in the chart below to identify operating frequency block range. (The frequency block range is engraved on the outside housing for each individual transmitter.) If a situation exists whereby the antenna is defective and the antenna cap is missing, refer to the following chart to determine the correct replacement antenna.
WM Specifications Operating frequencies: Block 470 470.100 - 495.600 Block 19 486.400 - 511.900 Block 20 512.000 - 537.500 Block 21 537.600 - 563.100 Block 22 563.200 - 588.
Watertight Transmitter The FCC requires that the following statements be included in this manual for the WM transmitter: The FCC requires that the following statement be included in this manual for the RM: For body worn operation, this transmitter models has been tested and meets the FCC RF exposure guidelines when used with the Lectrosonics accessories supplied or designated for this product. Use of other accessories may not ensure compliance with FCC RF exposure guidelines.
WM Service and Repair If your system malfunctions, you should attempt to correct or isolate the trouble before concluding that the equipment needs repair. Make sure you have followed the setup procedure and operating instructions. Check the interconnecting cables and then go through the Troubleshooting section in this manual. We strongly recommend that you do not try to repair the equipment yourself and do not have the local repair shop attempt anything other than the simplest repair.
Watertight Transmitter Rio Rancho, NM 21
WM 22 LECTROSONICS, INC.
LIMITED ONE YEAR WARRANTY The equipment is warranted for one year from date of purchase against defects in materials or workmanship provided it was purchased from an authorized dealer. This warranty does not cover equipment which has been abused or damaged by careless handling or shipping. This warranty does not apply to used or demonstrator equipment. Should any defect develop, Lectrosonics, Inc. will, at our option, repair or replace any defective parts without charge for either parts or labor.
