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RMT-10 VHF
Rack-Mount Transmitter
Instruction Manual
099-0068D
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2 Vega RMT-10 TABLE OF CONTENTS Quick Start........................ 2 A Word to Vega Users.................. 2 Unpacking ........................ 2 Introduction ....................... 4 Installation........................ 5 Whip Antenna Length................ 6 XLR Connector.................... 6 Power Supply .................... 6 Adjustments....................... 7 Audio Compression Adjustment*.......... 7 Audio Level Setting ................. 7 Frequency-Compensation Adjustments...... 8 Co
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Transmitter 3 5. Put on rack-mount (1a) “ears” or (1b) rubber feet (for details see “Installation” next page). 6. Attach the whip antenna (see the “Whip Antenna Length” section) or the optional dipole antenna to the ANTENNA connector on the rear panel. 7. Connect wall-type power supply to the rear-panel DC INPUT and then plug the power supply into an ac outlet. 8. Connect audio source to the rear-panel XLR connector (see “XLR Connector" next page). 9. Set the rear-panel INPUT LEVEL (MIC/LINE swi
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4 Vega RMT-10 Introduction This document describes setup, adjustment, and operation only; detailed maintenance information is not included. If you have any questions, consult your dealer or the Vega factory. Your Vega Model RMT-10 is a single-channel VHF FM transmitter. It transmits a mono audio signal to compatible receivers (typically Vega PL-2s). The RMT-10's “transmitter module” ( PCB) can be swapped (by authorized personnel) to allow operation on a different frequency—any one of over 1,600
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Transmitter 5 Installation The RMT-10 can be mounted in a standard 19-inch (48-cm) rack, or operate standing alone. For stand-alone operation: Peel off the four rubber feet's protective paper (provided with the RMT-10) and attach to the bottom of the chassis at each corner. For rack-mount use, the detachable rack-mount “ears” must first be installed on the RMT-10 as follows: 1. Loosen the four screws (do not remove) on the two sides of the unit that hold the top cover onto the chassis. 2. Slide
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6 Vega RMT-10 Whip Antenna Length For optimum antenna efficiency, the wire whip may be cut to length. Do NOT try to cut the whip with wire cutters, the whip is made from tough steel and will likely destroy the wire cutters. Use a bench grinder or equivalent to grind through the whip wire, being careful to use protective goggles and heavy gloves while grinding operation. The chart below lists the length required for various operating frequencies. The lengths shown are for the exposed portion of t
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Transmitter 7 Power supply negative (–) to the outer conductor Power supply positive (+) to the inner conductor Adjustments Note: Normal setup and operation does not require internal access. Refer all service and internal adjustments to qualified service personnel. Specifically, the user may not make adjustments to the transmitter module. See the “Troubleshooting” section for additional information. Use the same adjustment procedures for use with Clearcom, RTS, and 70-volt line applications. Aud
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8 Vega RMT-10 For use with Clearcom or RTS intercoms, or for 70-volt line applications, use the same basic adjustment procedures as above. Frequency-Compensation Adjustments Listen to the program audio on a compatible receiver (Vega PL-2). Experiment with the dynamic-range limiter settings and select the position that best meets your audio- quality and intelligibility needs. The controls should be adjusted to achieve maximum intelligibility for the particular listener group involved. For the hea
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Transmitter 9 Antennas Proper mounting and placement of antenna(s) is vitally important in wireless systems. If overlooked, antennas might cause unnecessary problems. In all cases, a clear and unobstructed line-of-sight path between the transmitting antenna and the receiver(s) is required. The antenna might be concealed behind fabric, thin plastic, acoustic tile, and thin plywood without significantly affecting performance. However, close proximity to metallic objects such as furniture, lighting
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10 Vega RMT-10 RF Noise Problems with RF noise sources (fluorescent lights, car ignitions, industrial equipment, etc.) are quite rare. Defective fluorescent lighting fixtures, however, can generate significant amounts of RF energy. Usually, repairing the fixture will cure the problem. This situation is true for most other interference sources as well. That is, unless the equipment is electrically defective, the interference will not adversely affect Vega wireless equipment. Warranty (Limited) Al
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Transmitter 11 Specifications Product Description: VHF audio transmitter Frequency Control: Single frequency, crystal controlled Frequency Stability: ± 0.005% Operating Frequency Range: 169-216 MHz RF Power Output: 50 mW, maximum Modulation: Direct FM, 45K0F3E Maximum Deviation: ± 7.5 kHz Deviation Limiter Range: Frequency-compensated active rectifier, voltage- controlled amplifier Balanced Audio Input (Mic/Line Mode): 3-pin female XLR; 1-ground, 2-audio +, 3-audio − Audio Input Level Select : R
