UCR411 UHF RECEIVER OPERATING INSTRUCTIONS and trouble-shooting guide LECTROSONICS, INC. Rio Rancho, NM www.lectrosonics.
TABLE OF CONTENTS DIGITAL HYBRID WIRELESS ............................................................................. 2 GENERAL TECHNICAL DESCRIPTION ............................................................ 3 FRONT PANEL CONTROLS AND FUNCTIONS ................................................ 6 LOCKING AND UNLOCKING THE UCR411 .................................................. 6 REAR PANEL FEATURES ...................................................................................
UHF Wireless Digital HybridTM Receiver GENERAL TECHNICAL DESCRIPTION The UCR411 is a portable, high performance, tripleconversion, frequency synthesized, UHF receiver fully compatible with all Lectrosonics 400 series transmitters. The RF performance is extremely stable over a very wide temperature range, making the UCR411 perfectly suited to the rough environmental conditions found in the field.
SMART SQUELCHTM The UCR411 employs a sophisticated squelching system in an attempt to deliver the cleanest possible audio during marginal conditions of reception. Any squelching system faces inevitable trade-offs: squelch too much and valu able audio information may be lost, squelch too little and excessive noise may be heard; respond too rapidly and the audio sounds “choppy,” respond too sluggishly and syllables or entire words can be cut off.
UHF Wireless Digital HybridTM Receiver RF-CONTROLLED DIGITAL NOISE FILTER LCD DISPLAY In addition to SmartNR, the UCR411 contains an RF sensitive variable frequency filter, which reduces high frequency response under extremely weak RF condi tions. This filter does nothing until the RF signal strength drops below 3 uV at which point it begins to roll off high frequencies. Usable audio remains unaffected, but noise-ups or “hits” occurring near the fringe of reception sound much less harsh.
FRONT PANEL CONTROLS AND FUNCTIONS Audio Levels - reference levels for audio signal modulation from transmitter SELECT UP Button - control up one step 1 Pilot 1000 100 10 SEL 1 uV 2 -40 -20 0 dB BAT Div RF LECTRO SELECT DOWN Button control down one step MENU Button changes windows Aud Rx Tx UCR 211 RF levels - reference for RF level screen icon MENU OFF ON OFF/ON - Power switch MAIN WINDOW Pilot tone indicator - A steady “P” icon will be displayed when a pilot tone from the transmitter
UHF Wireless Digital HybridTM Receiver REAR PANEL FEATURES BATTERY DOOR AUDIO OUT To open lift this edge and turn door 1 2 10-18 VDC 3 XLR AUDIO OUTPUT JACK TO REPLACE THE BATTERIES This is a standard XLR configuration with pin 2 “positive” with reference to hand-held and plug-on transmitters. With lavalier microphones and belt-pack transmitters, however, phase will vary with different types of micro phones (2-wire vs. 3-wire for example).
MENU SELECTIONS FROM MAIN WINDOW From the Main Window, you can navigate to the Frequency, Battery Level and Setup windows in a circular sequence by pressing the MENU button. Main Window U M P ress Pres M s M M U ME LEVEL 00 dBu NU Press MENU TX RX (Press UP / DOWN to adjust) s M EN U Audio Test Tone Audio Test Tone TONE? 00 dBu LVL 1K 00 dBu Press UP EN U EN U TV40 AE 631.800 7.2V 8.
UHF Wireless Digital HybridTM Receiver SETUP WINDOW In the SETUP window, the UP and DOWN buttons scroll through a list of SETUP five possible destinations: EXIT, EXIT LEVEL, TONE, TXBAT and PHASE INVERT. Each of these destinations allows a variety of settings to customize the receiver operating parameters. Press MENU at the screen shown here to return to the main window. The LEVEL setup screen shows the audio output level of the receiver in dBu. Use the UP or DOWN buttons to change the level.
FREQUENCY SCAN MODE To use the integrated scanning function, press both 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.
UHF Wireless Digital HybridTM Receiver ANTENNA USE AND PLACEMENT The receiver is supplied with two straight BNC antennas. In some circumstances remote antennas such as the SNA600 or ALP700 may be useful for improving recep tion. Position remote antennas at least three or four feet apart and so that they are also not within 3 or 4 feet of large metal surfaces. If this is not possible, try to posi tion the antennas so that they are as far away from the metal surface as is practical.
INSTALLATION AND OPERATING INSTRUCTIONS 1. Install batteries or connect the power cord. 2. Attach the antennas. 3. Turn the unit on. Check to see that the LCD display panel activates. 4. Set the frequency to match the transmitter frequency switch setting. See page 7. 5. Turn transmitter on and verify that an RF signal is being indicated on the LCD screen. See page 6. 6. Connect the audio cable to the audio output XLR. 7. Adjust the transmitter gain.
UHF Wireless Digital HybridTM Receiver TROUBLESHOOTING POWER SUPPLY AND FUSE ANTENNAS AND RF SIGNAL STRENGTH 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.
SPECIFICATIONS AND FEATURES Operating Frequencies (MHz): Block 21: Block 22: Block 23: and Block 24: Block 25: 537.600 563.200 588.800 614.100 614.400 640.000 - 563.100 588.700 607.900 614.300 639.900 665.500 Block 26: Block 27: Block 28: Block 29: Block 30: Block 31: 665.600 691.200 716.800 742.400 768.000 793.600 - 691.100 716.700 742.300 767.900 793.500 805.600 Frequency Adjustment Range: 25.
UHF Wireless Digital HybridTM Receiver 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 LIMITED YEARWARRANTY 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.
