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GENERAL INFORMATION
The Telex Model UR-700 Receiver and associated Transmitters is a
full diversity system operating within the frequency range of 690 to
725 MHz on specific pre-set frequencies. Systems consisting of the
UR-700 and its companion transmitter are capable of operating on
at least 5 frequencies in a TV channel simultaneously, sometimes
more depending on the individual venue. Certain frequencies can be
combined to form a set of systems compatible for simultaneous use.
Posi Phase Diversity
The UR-700 receiver utilizes Telex’s patented Posi Phase auto diver-
sity circuit. Unlike other types of diversity which receive with only
one antenna at a time, Posi Phase utilizes both antennas at all times.
This results in a stronger signal from the microphone for cleaner
audio and greater range.
If the microphone signal begins to go out of phase (a common cause
of “drop outs” with other types of diversity) the Posi Phase circuit
adjusts the phase angle between the two antennas’ receiving circuits
to prevent phase cancellation. This action is indicated by the 0 and
180 degree diversity lights on the front panel
Antennas
There are two TNC type antenna connectors on the rear panel. These
connectors are superior to the more common BNC connectors, both
electrically and mechanically. TNC connectors are becoming the
standard due to their heavy use in the Cellular Phone industry. Quarter
wave antennas are supplied for normal use or an optional antenna
accessory kit can be used to rack mount the antennas. Optional half
wave antennas with coax can be used for remote installations. Both
antennas must be used as both are active at all times, unlike other
types of diversity that only use one antenna at a time.
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