INSTRUCTION MANUAL R400A UHF Diversity Receiver Also part of IS400 and TM400 Systems (Includes IFB Mode) Featuring Digital Hybrid Wireless® Technology (US Patent 7,225,135) Fill in for your records: Serial Number: Purchase Date: Rio Rancho, NM, USA www.lectrosonics.
R400A 2 LECTROSONICS, INC.
UHF Wireless Diversity Receiver Table of Contents Introduction..............................................................................................................................................................................................4 Digital Hybrid Wireless®.........................................................................................................................................................................4 Diversity Reception...........................................
R400A Introduction The R400A is a high performance, triple-conversion, frequency synthesized UHF receiver fully compatible with all Lectrosonics 400 Series Digital Hybrid Wireless® transmitters, 200 Series and 100 Series analog transmitters and Lectrosonics IFB transmitters, plus some analog transmitters from other manufacturers (call Lectrosonics for details).
UHF Wireless Diversity Receiver Digital Pulse Counting Detector The R400A receiver uses an elegantly simple, yet highly effective digital pulse detector to demodulate the FM signal, rather than a conventional quadrature detector. This unusual design eliminates thermal drift, improves AM rejection, and provides very low audio distortion. The output from the Digital Pulse Counter is an analog signal containing the digital audio information.
R400A Smart Noise Reduction (SmartNR™) The wide dynamic range of digital hybrid technology, combined with flat response to 20 kHz, makes it possible to hear the –120 dBV noise floor in the mic preamp, or the (usually) greater noise from the microphone itself. (To put this in perspective, the noise generated by the recommended 4 k Ohm bias resistor of many electret lavaliere mics is –119 dBV and the noise level of the microphone’s electronics is much higher.
UHF Wireless Diversity Receiver Initial Setup 1. Connect the power cord from the power supply to the Power Input Jack. 2. Attach the antennas or antenna cables to the MAIN ANT and DIV ANT BNC connectors. 3. Press the POWER/PREV MENU button to turn on the unit on.
R400A Front Panel Controls and Functions LCD Screen The LCD Screen is used to monitor system operation and display information while configuring the R400A. (See R400A Menu Options.) POWER/PREV Menu Button Dual function control providing a POWER On/Off function and a return to previous menu function. If the receiver is turned off, momentarily pressing this button turns the receiver on. If the receiver is already turned on, pressing this button causes the LCD to display the previous menu.
UHF Wireless Diversity Receiver Antenna Use and Placement The receiver is supplied with two right angle BNC antennas. In some circumstances remote antennas such as the SNA600 or ALP600 may be useful for improving reception. Position remote antennas at least three or four feet apart and not within three or four feet of 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.
R400A R400A Menu Options R400A Menu Map Main Screen Display Icon Description Pilot tone indicator - A steady “P” is displayed when the transmitter pilot tone is present (in compatibility modes supporting pilot tones only). The icon flashes if no pilot tone is detected and changes to a small “b” if the pilot tone has been bypassed. Antenna Phase indicator - Displays antenna phase switching activity. As the DIV ANT phase is switched, the symbol will flip vertically.
UHF Wireless Diversity Receiver The R400A’s menu functions are accessed via the top level menu, by pressing the MENU control. The control is then rotated to browse the available menu options, and pressed to make a selection. Menu Functions The R400A Menu functions can be divided into four main areas: setting up the receiver, automatic clear channel selection, locking the receiver and scanning for clear frequencies. SetUpRx The SetUpRx menu accesses the screens used to set up the receiver.
R400A matching with other externally connected equipment without actually going “on the air.” The Tone level has a range of -55dBu to 0dBu and is adjusted in 1dB increments by rotating the menu control. The test tone has 1% distortion and is intended for confirmation of output levels only. Pressing the PREV MENU button exits the setup screen. Warning: There is only one audio output level setting for both received audio and the setup tone.
UHF Wireless Diversity Receiver 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. 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. Rotate the MENU control to select the noise reduction mode. Exit this setup screen by pressing the PREV MENU button.
R400A Pre-coordinated Frequencies Compatible Frequency Table Groupings of compatible frequencies have been created to minimize intermodulation problems in multiple channel wireless systems. The frequencies can be used with Digital Hybrid and analog Lectrosonics wireless equipment. Compatibility with other brands is likely, but not guaranteed by Lectrosonics. BLOCK 22 FREQ Pre-coordinated frequencies are arranged in four groups as shown at right.
UHF Wireless Diversity Receiver Compatibility Diagram BLOCK 24 Compatibility follows the pattern illustrated in the diagram at right. Grp a and Grp b contain the 16 frequencies shown in the table below (upper orange/white set). Grp c and Grp d contain the 16 frequencies shown in the table below (lower blue/white set). NOTE: There is no assurance that frequencies are compatible between the upper orange/white set and the lower blue/white set.
R400A Frequency Coordination Intermodulation interference is a problem constantly lurking in the background, especially when working in environments where simultaneous productions are taking place in close proximity. In these cases, proper frequency coordination is a must. There are basically three methods to coordinate frequencies: • Use the built-in frequency groups • Scan for clear channels (See SmartTune™ and Scan Function.
UHF Wireless Diversity Receiver Using SmartTune™ and the Scan Function The SmartTune™ feature automatically scans the receiver’s tuning range and tunes to the frequency with the least RF interference. The transmitter can then be tuned to match the receiver. If only one wireless channel is to be used, this simple one-step tuning is all that is required.
R400A Troubleshooting Symptom Solution LCD display not active 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 power input jack requires POSITIVE to be on the center pin.
UHF Wireless Diversity Receiver Symptom Solution RF Level is weak 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 helical antennas may be shorter, but are often less efficient.
R400A Replacement Parts and Accessories DCR12/A4U DCR12/A4U AC power supply with US type 2-pin plug on housing, 100 to 240 VAC input; 12 VDC 400 mA regulated output A500RA(xx) UHF flexible whip antenna with Right-Angle BNC Specify frequency block (last two digits (xx) specify frequency block, for example: A500RA21, A500RA22, etc.) SNA600 Collapsible dipole antenna adjustable from 550 MHz to 800 MHz.
UHF Wireless Diversity 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. Check the interconnecting cables and then go through the Troubleshooting section in this manual.
R400A Specifications and Features Operating Frequencies (MHz): Block 470: 470.100 - 495.600 Block 19: 486.400 - 511.900 Block 20: 512.000 - 537.500 Block 21: 537.600 - 563.100 Block 22: 563.200 - 588.700 Block 23: 588.800 - 607.900 614.100 - 614.300 Block 24: 614.400 - 639.900 Block 25: 640.000 - 665.500 Block 26: 665.600 - 691.100 Block 27: 691.200 - 716.700* Block 28: 716.800 - 742.300* Block 29: 742.400 - 767.
UHF Wireless Diversity Receiver Rio Rancho, NM 23
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.
