Telex ur-700 operating instructions General Information, Posi Phase Diversity, Antennas

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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