UH195 Plug-on Transmitter OPERATING INSTRUCTIONS and trouble-shooting guide LECTROSONICS, INC.
INTRODUCTION Thank you for selecting the Lectrosonics UH195 plug-on transmitter. The UH195 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 UH195 was the direct result of numerous conversations with users, staging and touring companies and dealers across the US.
Portable Wireless Sound System GENERAL TECHNICAL DESCRIPTION The UH195 transmitter is comprised of a number of functional sub-systems as shown in the block diagram below. The 195 system uses 75kHz wide deviation. The transmitter circuits are all regulated to allow full output power from the beginning (9 Volts) to the end (7 Volts) of battery life. The oscillator crystal is shock mounted to provide rugged ness. The input amplifier uses a Motorola 33078 op amp for ultra low noise operation.
CONTROLS AND FUNCTIONS The UH195 may be used with a wide variety of microphones. The 3-pin XLR connector on the UH195 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). INPUT JACK Standard 3-pin Switchcraft XLR type. Pin 2 is signal, pin 3 is signal ground, and pin 1 is case ground (see sche matic below). The UH195 is self-locking onto a standard microphone.
Portable Wireless Sound System OPERATING INSTRUCTIONS 1) Insert the UH195 into the selected microphone. Listen for the “click” that indicates the UH195 has locked on to the microphone. Pull on the mic to insure proper locking has occurred. TO ATTACH Press firmly, listen for click. Depress collar fully. Pull on mic to insure locking. Hold the transmitter case and rotate the collar in the direction shown.
BATTERY REPLACEMENT The UH195 transmitter is powered by a standard alkaline 9 Volt battery. It is important that you use ONLY ALKALINE batteries for longest life. Standard zinc-carbon batteries marked “heavy duty” or “long-lasting” are not adequate. They will provide only about 3 hours of operation. Similarly, nicad rechargeable batteries only give 3 hours of opera tion, and will also run down quite abruptly. Alkaline batteries provide about 7 hours of operation.
Portable Wireless Sound System TROUBLESHOOTING Before going through the following chart, be sure that you have a good battery in the transmitter the red power LED on the transmitter panel should glow brightly. SYMPTOM POSSIBLE CAUSE NO AUDIO IS HEARD BUT RECEIVER RF LED IS ON 1) On/Off switch is in “mute”position on receiver or transmitter. 2) Microphone on/off switch is in “off” position. 3) Volume is turned down or off on transmitter or receiver.
SPECIFICATIONS AND FEATURES Operating frequencies: 470 to 608 MHz RF Power output: 100 mW (nominal) Frequency stability: ± 0.004% Deviation: ± 75 kHz (max) Spurious radiation: 50 dB below carrier Equivalent input noise: -126 dBV Pilot tone: 32.768 kHz (± 2Hz); 5kHz deviation Input level: Nominal 2 mV to 300 mV, before limiting. Greater than 3 Volts maximum, with limiting.
Portable Wireless Sound System 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.
LIMITEDONE 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.
