Introduction
Vega wireless microphone systems are easy to use. However, if you are setting up a
wireless microphone for the first time, we urge you to read carefully the manuals
furnished with each piece of equipment, and to consult the manual from time to time as
you become more familiar with your equipment.
This manual has been prepared to acquaint you with the operation and care of your
Vega R-27 wireless-microphone receiver. We urge you to read it carefully and to follow
the recommendations. This will help to assure that you realize the full performance
potential of the equipment and achieve years of reliable, highly satisfactory operation.
Compatibility
The Vega Model R-27 PRO portable receiver works with Vega's PRO Series bodypack
transmitters (such as the Model T-25) and handheld transmitters (such as the T-29). The
receiver is available only with DYNEX®III audio-processing circuitry. Therefore, it is
not compatible with with non-DYNEX®III transmitters. If you are not certain that the
receiver and transmitter are compatible, contact the Vega factory or your Vega sales
representative.
The R-27 PRO receiver is designed to work in the 169 to 216 MHz VHF range, and
must be precisely matched to the frequency of the associated transmitter. The receiver's
frequency is marked on its case. The transmitter's frequency is marked on the data label
on its side or in its battery compartment. If the transmitter and receiver frequencies are
not precisely the same, the frequency of one of the units must be changed. It is usually
easier to change the frequency of the receiver; however, it is advisable to return both
units to the factory or authorized service location when changing frequencies, to ensure
the best results. Because of the very high performance of these units and the specialized
test equipment required to adjust them properly, users should not try to change
frequency themselves.
If two or more systems are used at the same location, proper frequency selection and
spacing are required to avoid possible interference. Vega offers a free frequency-
coordination service for purchasers of its equipment. Frequencies are selected by
computer to avoid any possible interference from other wireless systems and broadcast
stations. To take advantage of this free service, contact the Vega factory or your local
sales representative.
Controls, Connectors, and Indicators
LED Displays: The four LEDs on the front panel indicate the following: receiver
squelch condition (TX); low-level audio (–30); audio overload (–4); and acceptable
battery power (PWR).
The TX indicator turns on whenever a transmitter is producing enough power, at the
same frequency, to operate the receiver. When the TX LED is off, the receiver audio is
squelched (shut down).
The audio metering circuitry is a simple two-LED display. Provided the AUDIO
LEVEL adjustment is set to maximum, the –4 and –30 LEDs correspond to the same
approximate microphone dBu output level. The Audio Level control adjustment does
not affect the display, because metering is done prior to the output stage. With normal
speech the –30 indicator should be flashing on and off with the audio. The –4 LED is
an overload indicator and should not flash except with extremely large audio bursts.
The activation of this overload indicator means that the transmitter is reaching soft
compression. However, the gain-compression circuitry in the transmitter doesn't respond
Wireless-Microphone Receiver
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