UH100 UHF MULTI-FREQUENCY PLUG-ON TRANSMITTER OPERATING INSTRUCTIONS and trouble-shooting guide LECTROSONICS, INC. Rio Rancho, NM http://www.lectrosonics.
INTRODUCTION Thank you for selecting the Lectrosonics UH100 frequency agile, plug-on transmitter. The UH100 combines over 80 years of engineering experience with the very latest components, in a design that addresses the most demanding professional applications. The design of the UH100 was the direct result of numerous conversations with users, staging and touring companies and dealers across the US.
UHF Multi-frequency Plug-on Transmitter GENERAL TECHNICAL DESCRIPTION The UH100 transmitters are comprised of a number of functional sub-systems as shown in the block diagram below. GENERAL The 100 system uses 20kHz wide deviation for a high signal to noise ratio. The transmitter circuits are all regulated to allow full output power from the beginning (9 Volts) to the end (6.5 Volts) of battery life. The input amplifier uses an ultra low noise op amp.
CONTROLS AND FUNCTIONS The UH100 may be used with a wide variety of microphones. The 3-pin XLR connector on the UH100 allows the transmitter to be used with any dynamic microphone, as well as many two wire positive bias lavalier systems (such as those systems supplied by Lectrosonics). LEVEL LED LIMIT LED BATTERY POWER LED INPUT JACK Standard 3-pin Switchcraft XLR type. Pin 2 is signal, pin 3 is a floating signal ground, and pin 1 is case ground (see schematic below).
UHF Multi-frequency Plug-on Transmitter OPERATING INSTRUCTIONS 1) Insert the UH100 into the selected microphone. Listen for the “click” that indicates the UH100 has locked on to the micro phone. Pull on the mic to insure proper locking has occurred. TO ATTACH Press firmly, listen for click. Depress collar fully. The first LED turns on 20dB below full deviation. The “0” LED turns on at full deviation and indicates that the input shunt compressor is operating.
BATTERY REPLACEMENT The UH100 transmitter is powered by a standard alkaline 9 Volt battery. It is important that you use ONLY ALKALINE OR LITHIUM batteries for longest life. Standard zinc-carbon batteries marked “heavy duty” or “long-lasting” are not adequate. They will provide only about 5 minutes of operation. Similarly, nicad rechargeable batteries only give 1 hour of operation, and will also run down quite abruptly.
UHF Multi-frequency Plug-on Transmitter RECEIVER RF LAMP OFF 1) Transmitter not turned on. 2) Transmitter battery is dead. 3) Receiver antenna missing or improperly positioned. 4) Transmitter and receiver not on same frequency. Check switches/ display on transmitter and receiver. 5) Operating range is too great. NO SOUND (OR LOW SOUND LEVEL), RECEIVER MOD LEVEL LEDs ARE ON 1) Receiver output level set too low. 2) Receiver output is disconnected; cable is defective or mis-wired.
SPECIFICATIONS AND FEATURES Operatingfrequencies: 537.6 to 588.7 MHz, 614.4 to 793.5 MHz Frequencyselection: 256 frequencies in 100kHz steps RFPoweroutput: 100 mW (nominal) Frequencystability: ± 0.002% Deviation: ± 20 kHz (max) Spuriousradiation: 90 dB below carrier at frequencies less than 1GHz Equivalentinputnoise: -126 dBV Inputlevel: Nominal 2 mV to 300 mV, before limiting. Input greater than 2V, with limiting.
UHF Multi-frequency Plug-on Transmitter 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.
LIMITED ONE ONE YEAR WARRANTY LIMITED 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.
