INSTRUCTION MANUAL UCR411A Digital Hybrid Wireless® Compact UHF Receiver (US patent 7,225,135) Fill in for your records: Serial Number: Purchase Date: Rio Rancho, NM, USA www.lectrosonics.
UCR411A 2 LECTROSONICS, INC.
UHF Digital Hybrid Wireless™ Receiver Digital Hybrid Wireless® The Lectrosonics Digital Hybrid WirelessTM uses innovative technology to combine the new advantages of digital audio with the classic advantages of analog RF transmission, thus delivering the superior sound quality of a digital system and the excellent range of an analog system. A proprietary algorithm encodes the digital audio information into an analog format which can be transmitted in a robust manner over an analog FM wireless link.
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UHF Digital Hybrid Wireless™ Receiver Table of Contents Digital Hybrid Wireless®.....................................................................................................................................................................................................................................................................................................3 General Technical Description...........................................................................................................
UCR411A General Technical Description UCR411A Block Diagram The UCR411A is a portable, high performance, tripleconversion, frequency synthesized, UHF receiver fully compatible with all Lectrosonics 400 Series transmitters (and some other transmitter types – see Compatibility Modes for details). The RF performance is extremely stable over a very wide temperature range, making the UCR411A perfectly suited to the rough environmental conditions found in the field.
UHF Digital Hybrid Wireless™ Receiver IF Amplifiers and SAW Filters The first IF low noise amplifier is controlled with feedback regulation and drives the first of two quartz SAW (Surface Acoustical Wave) filters. The 244 MHz SAW filters combine sharp tuning, constant group delay, wide bandwidth and excellent temperature stability, far superior to conventional LC filters. The 244 MHz first IF signal is converted down to 10.
UCR411A applied to remove most of the hiss from the mic preamp and some of the hiss from lavaliere microphones. The noise reduction benefit is dramatic in this position, yet the degree of transparency maintained is exceptional. When switched to FULL, enough noise reduction is applied to remove most of the hiss from nearly any signal source of reasonable quality, assuming levels are set properly at the transmitter.
UHF Digital Hybrid Wireless™ Receiver Front Panel Controls and Functions LCD Screen SELECT Up Button MENU Button LCD Screen The LCD Screen is a graphics-type Liquid Crystal Display that is used to monitor system operation and configure the UCR411A. MENU Button The MENU button steps through the four primary windows and setup screens. SELECT Up/Down Buttons The SELECT Up/Down buttons are used to select various options within each display selection and to set the operating frequency of the receiver.
UCR411A Main Window (LCD) The Main Window displays information concerning the condition of the Pilot Tone, antenna phase, RF and audio signal levels and battery conditions for both the receiver and the associated transmitter. It is also the access portal to menu selections for setting up the receiver and searching for clear frequency channels. (See Menu Selections from Main window and Frequency Scan Mode.
UHF Digital Hybrid Wireless™ Receiver Menu Selections from Main Window Note: NA M7 & EU M7 are only available with firmware 6.0 on the audio board. From the Main window, you can navigate to the Frequency, Battery Level and Setup windows in a circular sequence by pressing the MENU button. Frequency Window TVxx - Indicates the television broadcast channel (xx) this frequency falls within.
UCR411A SETUP Window In the SETUP window, the SEL Up and Down buttons scroll through a list of eight possible setup screens: EXIT, LEVEL, TONE, TXBAT, PHASE, SmtNR (in 400 Series mode only), TUNING and COMPAT. Each of these setup screens allows the user to change the associated operating parameters. Pressing the MENU button accesses whatever mode is identified in the Setup window. Pressing the MENU button whenever EXIT is displayed returns the user to the Main window.
UHF Digital Hybrid Wireless™ Receiver TUNING Setup Screen The TUNING setup screen allows selection of one of four factory set frequency groups (Groups A through D), two user programmable frequency groups (Groups U and V) or the choice to not use groups at all. Note: User Group Tuning available in units with firmware version 3.0 and above. In the four factory set frequency groups, eight frequencies per group are preselected. These frequencies are chosen to be free of intermodulation products.
UCR411A Frequency Scan Mode To start the scanning, press both SEL Up/Down buttons and the MENU button at the same time. The display will switch to the SCAN WINDOW and start scanning immediately. Data gathered during a scan is stored until it is purposely erased or the power is turned off. Previous data will remain and subsequent scans can be made to search for additional signals or to accumulate higher peaks. To stop scanning, press the MENU button once.
UHF Digital Hybrid Wireless™ Receiver Antenna Use and Placement The receiver is supplied with two straight BNC whip antennas. In some circumstances remote antennas may be useful for improving reception. Position remote antennas at least three or four feet apart and at least three or four feet from large metal surfaces. If this is not possible, try to position the antennas so that they are as far away from the metal surface as is practical.
UCR411A Installation and Operating Instructions 1. Install a fresh battery or connect an external power source to the UCR411A and attach the antennas. 2. Unless frequency settings have been previously assigned, scan for an open frequency and set both the receiver and transmitter to that frequency. (See Finding Clear Frequencies.) 3. Connect the audio cable to the Receiver Audio Out XLR jack. 4. Set the Power ON/OFF switch to ON and verify that the LCD panel activates. 5. Adjust the transmitter gain.
UHF Digital Hybrid Wireless™ Receiver 5. RF signal strength is indicated by markings in microvolts on the front panel to the left of the LCD. 1 Pilot 1000 100 10 SEL 1 uV The front panel controls can be “LOCKED” to prevent accidental changes being made during operation and handling. 2 -40 -20 0 dB BAT Div RF Aud Rx Tx Locking and Unlocking the UCR411A Front Panel Controls MENU OFF ON RF level in microvolts Look for clear channels in the spectrum where there is no RF activity.
UCR411A Replacing the Batteries Lift and rotate the battery door to open it. Observe the battery contacts inside the compartment. The larger contact is the neg. (-) terminal and the smaller contact is the pos. (+) terminal. Insert the contact end of the battery first, making sure the large terminals are aligned with the large contacts in the compartment. Depress the batteries slightly to allow the door to rotate and close. The battery contacts are spring loaded to maintain constant pressure.
UHF Digital Hybrid Wireless™ Receiver Antenna/Block Reference Table The A8U whip UHF whip antenna supplied with the receiver is factory cut to a specific frequency block as shown in the table below. A colored cap and label are used on blocks 21 through 29, and a black cap and label are used on the other blocks to denote the frequency range of each model. The chart is useful for fabricating an antenna from coaxial cable or other materials, or for identifying the frequency of an antenna that is not marked.
UCR411A Pre-coordinated Frequencies Interference from IM (intermodulation) is a potential problem in all multi-channel wireless systems, so proper frequency coordination is always required to avoid noise, range and dropout problems.
UHF Digital Hybrid Wireless™ Receiver Diagnostics Multi-channel System Checkout Interference can result from a wide variety of sources including TV station signals, other wireless equipment in use nearby, or from intermodulation within a multichannel wireless system itself. Regardless of how the frequencies were coordinated, a final checkout procedure is always a good idea.
UCR411A Replacement Parts and Accessories 32251 VSR1 Velcro mounting strips CCMINI Zippered, padded vinyl system pouch CH12 AC power supply with US type 2-pin plug on housing, 110 VAC input; 12 VDC, 400 mA output. VSR1 Thin velcro loop for power cable strain relief. A8U UHF marine phosphor bronze antenna - straight connector, specify block. CH12 PS70 A/C power supply with 3-pin NEMA socket on housing, 100-240 VAC input; 13.8 VDC, 2.8 A (max.) output.
UHF Digital Hybrid Wireless™ Receiver Troubleshooting Symptom Possible Cause INITIAL POWER ON LCD display not active or lit. External power supply disconnected or inadequate. Main power supply fuse tripped. Turn the receiver off, remove the cause of the overload and turn the receiver back on. Wrong polarity power source. The external DC in requires POSITIVE to be on the center pin. Battery may be low. Try a fresh battery. Version message shows DSP or COM.
UCR411A Symptom Possible Cause ANTENNAS AND RF SIGNAL STRENGTH RF Level is weak. No RF Signal AUDIO SIGNAL QUALITY Poor signal to noise ratio Receiver may need to be moved or reoriented. Antenna on transmitter may be defective or poorly connected double check antenna on transmitter. Improper length of antenna, or wrong antenna on transmitter or receiver. UHF whip antennas are generally about 3 to 5 inches long.
UHF Digital Hybrid Wireless™ Receiver Specifications and Features Operating Frequencies (MHz): Block 470: Block 19: Block 20: Block 21: Block 22: Block 23:* Block 606: (Export - Outside N. America) Block 24: Block 25: Block 26: Block 27: (Export - Outside N. America) Block 28: (Export - Outside N. America) Block 29: (Export - Outside N. America) Block 30: (Export - Outside N. America) Block 31: (Export - Outside N. America) Block 32: (Export - Outside N.
UCR411A 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.
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UCR411A 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.
