UH200 FREQUENCY-AGILE PLUG-ON UHF TRANSMITTER OPERATING INSTRUCTIONS and trouble-shooting guide LECTROSONICS, INC.
INTRODUCTION Thank you for selecting the Lectrosonics UH200 frequency agile, plug-on transmitter. The UH200 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 UH200 was the direct result of numerous conversations with users, staging and touring companies and dealers across the US.
Frequency Agile Plug-on UHF Transmitter GENERAL TECHNICAL DESCRIPTION The UH200 transmitters are comprised of a number of functional sub-systems as shown in the block diagram below. GENERAL The 200 system uses 75kHz wide deviation for an extremely high signal to noise ratio. The transmitter circuits are all regu lated 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 UH200 may be used with a wide variety of microphones. The 3-pin XLR connector on the UH200 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). LIMIT LED LEVEL 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).
Frequency Agile Plug-on UHF Transmitter OPERATING INSTRUCTIONS 1) Insert the UH200 into the selected microphone. Listen for the “click” that indicates the UH200 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 UH200 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 batter ies 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. Alkaline batteries provide about 4.
Frequency Agile Plug-on UHF 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 Operating frequencies: 470 to 608 MHz, 614 to 806 MHz Frequency selection: 256 frequencies in 100kHz steps RF Power output: 100 mW (nominal) Pilot tone: 32.764 kHz (± 2Hz); 5kHz deviation Frequency stability: ± 0.002% Deviation: ± 75 kHz (max) Spurious radiation: 90 dB below carrier at frequencies less than 1GHz Equivalent input noise: -126 dBV Input level: Nominal 2 mV to 300 mV, before limiting. Input greater than 2V, with limiting.
Frequency Agile Plug-on UHF 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 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 demonstra tor equipment. Should any defect develop, we will, at our option, repair or replace any defective parts without charge for either parts or labor.
