R400 UHF DIVERSITY RECEIVER (Includes IFB Mode) Featuring Digital Hybrid Wireless™ Technology (US Patent Pending) OPERATING INSTRUCTIONS Rio Rancho, NM, USA www.lectrosonics.
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Portable Wireless Sound System The Lectrosonics Digital Hybrid WirelessTM (US Patent Pending) 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.
R400 GENERAL TECHNICAL DESCRIPTION INTRODUCTION RF FRONT-END AND MIXER The R400 is a high performance, triple-conversion, frequency synthesized UHF receiver fully compatible with all Lectrosonics 400 Series Digital Hybrid WirelessTM transmitters, 200 and 100 Series analog transmitters, plus analog transmitters from other manufacturers (call Lectrosonics for details).
Portable Wireless Sound System IF AMPLIFIERS AND SAW FILTERS The first IF low noise amplifier is controlled with feed back regulation and drives a quartz SAW (Surface Acoustical Wave) filter. The 244 MHz SAW filter com bines sharp tuning, constant group delay, wide band width and excellent temperature stability, far superior to conventional LC filters. The second mixer converts the 244 MHz first IF signal down to 10.7 MHz.
R400 previous designs. Desired high frequency signals having some coherence such as speech sibilance and tones are not affected. The Smart Noise Reduction algorithm has three modes, selectable from a user setup screen: Off, Normal and Full. OFF - No noise reduction is performed and complete transparency is preserved. All signals presented to the transmitter’s analog front end, including any faint microphone hiss, will be faithfully reproduced at the receiver.
Portable Wireless Sound System FRONT PANEL CONTROLS AND FUNCTIONS LCD Screen POWER/PREV MENU Button MENU Control LCD SCREEN The LCD Screen is a graphics-type Liquid Crystal Display that is used to monitor system operation and, in conjunction with the MENU control, to configure the R400. (See R400 MENU SELECTIONS.) POWER/PREV MENU BUTTON Dual function control providing a POWER On/Off func tion and a return to previous menu function.
R400 R400 MENU SELECTIONS Main Window R400 P 1000 100 10 557.100 NORM 40 1uV 20 C3 0 R400 Menu Map TopMenu SetUpRx LockSet SmrtTun Scan xExit SetUpRx LockSet LockSet NOT LOCKED SmrtTun* SmartTuning in progress... Scan Freq Scan Window Freq Freq TV28 NORMAL C3 557.
Portable Wireless Sound System The R400 Menu Functions are entered from the Main Window by pressing the MENU control. Navigate from the TopMenu through subsequent submenus and set tings by rotating the MENU control to select the desired menu then push it to enter the selected menu. MENU FUNCTIONS The R400 Menu functions can be divided into three main functional areas: setting up the receiver, locking the receiver and scanning for clear frequencies.
R400 NORMAL Exit this setup screen by pressing the PREV MENU button. TxBatt The TxBatt setup screen allows the selection of the exact battery type being used in the transmitter to provide more accurate battery level monitoring. Four different types of batteries are commonly used in Lectrosonics transmitters: 9 Volt alkaline, 9 Volt lithium, AA alkaline, and AA lithium. Rechargeable NiMH batteries can also be used in the transmitters (see TIMER below).
Portable Wireless Sound System the MENU control to scroll the cursor across the tuning range. As the cursor scrolls across the frequency band, Frequency Select Switch settings for the associated transmitter are shown in the upper right corner of the screen. lower frequencies, or clockwise to show higher frequen cies. Scroll through the screen and find a frequency where no RF signals are present (or in the worst case, only very weak RF signals).
R400 ANTENNA USE AND PLACEMENT The receiver is supplied with two right angle BNC antennas. In some circumstances remote antennas such as the SNA600 or ALP700 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 posi tion the antennas so that they are as far away from the metal surface as is practical.
Portable Wireless Sound System INSTALLATION AND OPERATING INSTRUCTIONS 1. Connect the power cord from the power supply to the Power Input Jack. 7. Refer to the associated transmitter operating instructions and adjust the transmitter gain. Warning This is perhaps the most important step in the set up procedure.
R400 ADDING USER GROUP FREQUENCIES 1. From the Main Window, press the MENU control to enter SetUpTx, then press the MENU control again to enter the TopMenu and rotate the control to select the Tuning setup screen. 2. Press the MENU control to enter the Tuning setup screen, then rotate the control to select either User Group U or User Group V. 3. Press PREV MENU to return to the SetUpRx menu. 4. Rotate the MENU control to select the Freq menu.
Portable Wireless Sound System R400 REPLACEMENT PARTS AND ACCESSORIES Part No. Description 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 UHF flexible whip antenna with right angle BNC con nector (470 - 767 MHz) SNA600 Collapsible dipole antenna adjustable from 550 MHz to 800 MHz. Ideal for situations where a full 360 degree receiving pattern is required as opposed to a directional pattern.
R400 Frequency Coordination Intermodulation interference is a problem constantly lurking in the background, especially when working in environments were multiple productions are taking place simultaneously in relative close proximity. In these cases, proper frequency coordination is a must.
Portable Wireless Sound System Compatible Incompatible The following frequency combinations have no intermodulation prob lems. The following frequency combinations have intermodulation prob lems and should not be used. SW SET FREQ US TV CH 0,5 tv29 564.300 0,B tv29 565.200 1,4 tv29 tv25 565.800 1,A tv29 541.500 2,7 tv25 567.100 2,7 tv30 542.400 3,0 tv26 568.000 3,0 tv30 542.900 3,5 tv26 568.500 3,5 tv30 543.700 3,D tv26 569.300 3,D tv30 550.100 7,D tv27 575.
R400 Rule No. 2 Using the Scan Function Frequencies within an individual frequency block in the same row are compatible. For example, all 16 frequen cies within Row 1, Block 21 are compatible, and all frequencies in Row 2 Block 21 are compatible. However, frequencies in Row 1, Block 21 are not compatible with the frequencies in Row 2, Block 21. If possible, it is highly recommeneded to choose frequencies that are in the same row and same group.
Portable Wireless Sound System 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 external DC in requires POSITIVE to be on the center pin.
R400 Symptom Solution No RF Signal Make certain frequency switches on transmitter match the receiver frequency setting. Check battery in transmitter. Poor signal to noise ratio Transmitter gain set too low. The noise may not be in the wireless system. Turn the transmitter audio gain all the way down and see if the noise remains. If the noise remains, then turn the power off at the transmitter and see if it remains. If the noise is still present, then the problem is not in the transmitter.
Portable Wireless Sound System SPECIFICATIONS AND FEATURES Operating Frequencies (MHz): Frequency Adjustment Range: Receiver Type: Frequency Stability: Front end bandwidth: 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 Block 21: 537.600 - 563.100 Block 22: 563.200 - 588.700 Block 23: 588.800 - 607.900 and 614.100 - 614.300 Block 24: 614.
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 intercon necting cords and then go through the TROUBLESHOOTING 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.
R400 LIMITED ONE YEAR WARRANTY 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.
