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Summary of Contents for Lectrosonics R172
- Page 1 INSTRUCTION MANUAL R172 DUAL-RECEIVER LECTROSONICS, INC. 581 Laser Road Rio Rancho, NM 87124 USA Tel (800) 821-1121 or (505) 892-4501 fax (505) 892-6243 e-mail: sales@lectrosonics.com web: www.lectrosonics.com...
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Page 2: Table Of Contents
INTRODUCTION The R172 receiver is a fixed frequency design two channel wireless microphone receiver. Designed to offer two simultaneous channels of wireless microphones, the R172 will can operate both channels from one antenna or two for passive diversity operation. The dual antenna configuration reduces the probability of dropouts resulting from multipath interference. -
Page 3: Receiver Front Panel
RECEIVER FRONT PANEL Front panel controls on the R172 are identical for each channel and operate independently from each other. MODULATION -- Indicates the modulation (audio level) of the incoming signal. The green LED indicates an adequate modulation level. The red LED indicates maximum or "peak" modulation. -
Page 4: Receiver Rear Panel
RECEIVER REAR PANEL ANTENNA terminals -- Standard BNC 50 ohm connectors for connecting the antennas. The R172 is normally shipped with a telescoping whip antenna and a coaxial antenna. Rack mounted units are shipped with two coaxial antennas. ANTENNA MODE - The unit may be operated as either a single antenna or a dual antenna system. If two antennas are used set the switch to DUAL . - Page 5 Figure 2 R172 Rear Panel...
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Page 6: Operating Instructions
OPERATING INSTRUCTIONS SET UP AND OPERATION SEQUENCE 1) CONNECT POWER CORD -- Plug the connector of the CH-12 adapter included with the receiver into the jack labeled "12 VDC INPUT." Insert the plug fully into the jack. 2) ATTACH THE ANTENNAS - Two antennas are provided with the receiver. If the system is not rack mounted, the unit will have a telescoping whip antenna and a coaxial dipole antenna (this antenna looks like a piece of cable with a small loop in one end and a BNC connector on the other). - Page 7 If the system will be installed with dual antennas - Attach both antennas to the dual BNC connectors on the back of the receiver. Set the ANTENNA MODE switch to the DUAL position. If a telescoping whip is used, fully extend the whip. DO NOT USE TWO TELESCOPING WHIPS ATTACHED SIDE BY SIDE AT THE RECEIVER.
- Page 8 3) CONNECT THE AUDIO CABLE/S If the receiver will be connected directly to an amplifier and there is only one audio input available, set the SEPARATE/MIXED switch to the mixed position and connect the cable to either the "A" or "B" output jack. You may also used the MIXED position to connect the receiver to a tape deck and an amplifier for simultaneous recording.
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Page 9: Antenna Use And Placement
The dual antenna configuration (passive diversity) of the R172 helps reduce the probability of this problem occurring. In the event that you do encounter a dropout problem, first try moving the receiver/antennas at least 3 or 4 feet from where they were. -
Page 10: Multi-Channel Audio Mixing
Adjust the volume of the tape player with the volume control on the tape player since there is not a separate control for this purpose on the receiver. You may also record from the R172 by... -
Page 11: Troubleshooting
TROUBLESHOOTING Before going through the following chart, be sure that you have a good battery in the transmitter. It is important that you follow these steps in the sequence listed. SYMPTOM POSSIBLE CAUSE 1) External LED is turned off. Check internal slide TRANSMITTER BATTERY LED OFF switch. -
Page 12: Specifications
SPECIFICATIONS 150 to 216 MHz crystal controlled Operating frequencies: 1.0uV for 20dB SINAD Sensitivity: 2.0uV for 50dB S/N ratio 96 dB A-weighted Signal/noise ratio: Squelch quieting: greater than 96 dB better than -40 dB AM rejection: (10uV to 0.1 volts) +/- 15KHz Modulation acceptance: greater than 100 dB... -
Page 13: Factory Repair Service
Once they are set at the factory they never require readjustment. There are no adjustments inside the unit that will make a malfunctioning unit start working. LECTROSONICS will supply, on request, a technical service package of schematics and alignment instructions to qualified personnel. This information will be supplied free of charge.
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