UCR200D DIVERSITY UHF RECEIVER OPERATING INSTRUCTIONS and trouble-shooting guide LECTROSONICS, INC.
Table of Contents GENERAL TECHNICAL DESCRIPTION ......................................... 3 GENERAL TECHNICAL DESCRIPTION ......................................... 4 GENERAL TECHNICAL DESCRIPTION ......................................... 5 FRONT PANEL CONTROLS AND FUNCTIONS ............................ 6 REAR PANEL CONTROLS AND FUNCTIONS ............................... 7 ANTENNA USE AND PLACEMENT ................................................ 8 INSTALLATION AND OPERATING INSTRUCTIONS .....................
UHF Wireless Diversity Receiver GENERAL TECHNICAL DESCRIPTION The UCR200D is a portable, high performance, dual-conversion, frequency synthesized, UHF receiver. The RF performance is extremely stable over a very wide temperature range, making the UCR200D perfectly suited to the rough environmental conditions found in the field. The proprietary audio processing includes a dual-band compandor for very low distortion and a superior signal to noise ratio.
GENERAL TECHNICAL DESCRIPTION front end, it would be a shame to waste the performance with a second rate mixer. In other designs that is exactly what happens since mediocre mixers cause more intermodulation problems than mediocre front ends. The only solution was a high power, double balanced diode mixer driven by a local oscillator with more output power than most wireless transmitters (50 mW). The mixer in the UCR200D produces output at only the sum and difference signals, with minimal spurious signals.
UHF Wireless Diversity Receiver GENERAL TECHNICAL DESCRIPTION OUTPUT LEVEL ADJUST AND RANGE SWITCH The front panel Output control will adjust the audio output within the range set by the Lo/Mid/Hi range switch (located on the back panel.) In the Lo position the adjustment range is from –50dBm to –20dBm, the Mid position (center) allows an adjustment from –30dBm to 0dBm, and the Hi position sets the audio output to a fixed +8dBm with no front panel control.
FRONT PANEL CONTROLS AND FUNCTIONS POWER LED When lit, this LED indicates that power is applied to the UCR200D and adequate voltage is present to operate the unit. PILOT LED The audio output muting (squelch) function of the UCR200D is controlled by a 32kHz tone modulation of the RF carrier. The audio output is muted until this tone is present. This green LED will remain on as long as the receiver audio is enabled by the pilot tone.
UHF Wireless Diversity Receiver REAR PANEL CONTROLS AND FUNCTIONS DC IN JACK MONITOR The UCR200D can be powered from external 12 to 18 Volts DC applied directly to this jack, or conventional 110 VAC sources via the supplied CH20 adapter. The UCR200D is protected from reverse polarity conditions which prevents damage if a positive ground power source is applied. The center pin of this jack is POSITIVE. This power connector is threaded to allow the plug to be locked in preventing accidental pull-out.
ANTENNA USE AND PLACEMENT sound of the hum or hiss, or eliminate it. A drop-out situation may be either better or worse as the crowd fills and/or leaves the room, or when the transmitter or receiver is operated in a different location. There are two remote antenna assemblies included with this re ceiver. Position the antennas at least three or four feet apart and so that they are not within 3 or 4 feet of large metal surfaces.
UHF Wireless Diversity Receiver INSTALLATION AND OPERATING INSTRUCTIONS 1. Connect the power cord. 2. Attach the antennas. 3. Connect the audio cable to the audio output XLR. 4. Set the front panel Audio Output Level control to minimum and set the Power switch to ON (right position.) Check to see that the front panel Power LED lights up. 5. Adjust the transmitter gain. THIS IS PERHAPS THE MOST IMPORTANT STEP IN THE SET UP PROCEDURE.
FREQUENCY BLOCKS AND RANGES The table below lists the factory designated frequency ranges available for the UCR200D receiver. For convenience, the table includes information about the UM200B belt-pack transmitter antennas as well. Each UCR200D receiver is built to cover a pre-selected range of frequencies (a “block”) as shown below. The receiver will tune to any of 256 different frequencies within this factory assigned block.
UHF Wireless Diversity Receiver TROUBLESHOOTING POWER SUPPLY AND FUSE AUDIO SIGNAL QUALITY LEDs not lit or dimly lit Poor signal to noise ratio • External power supply disconnected or inadequate. • Transmitter gain set too low • Main power supply fuse tripped. Turn the receiver off, remove the cause of the overload and turn the receiver back on. • Noise may not be in wireless system. Mute the audio signal at the transmitter and see if noise remains.
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 out the interconnecting cords and then go through the TROUBLE SHOOTING section in the 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.
UHF Wireless Diversity Receiver SPECIFICATIONS AND FEATURES Operating Frequencies: Frequency Adjustment Range: Receiver Type: Frequency Stability: Front end selectivity: Sensitivity 20 dB Sinad: 60 dB Quieting: Squelch quieting: AM rejection: Modulation acceptance: Image and spurious rejection: Third order intercept: Diversity method: FM Detector: Antenna inputs: Audio outputs Rear Panel XLR: 537.600 to 588.700 MHz; 614.400 to 793.500 MHz 25.5 MHz Dual conversion, superheterodyne, 71MHz and 455kHz ±0.
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, we will, at our option, repair or replace any defective parts without charge for either parts or labor.
