Knowledge

Posi-Phase diversity uses two antennas spaced apart, connected to a single high quality receiver. The antenna signals are connected internally to microprocessor circuits that monitor the phase relationship between the two antennas. Both antennas are active at all times which greatly increases the signal strength under normal conditions. In the event of a signal interruption from a partial phase cancellation (multipath) or total phase cancellation (dropout) the logic circuitry adjusts the phase of the secondary antenna to a positive condition relative to the primary antenna. This process occurs in a fraction of a second and continually adjusts the phase of the second antenna for the optimum signal. A similar patented technique is used in cellular telephones to insure their reliable operation. Telex Posi-Phase diversity is more effective and less costly to produce than switching diversity because only one high quality receiver is required. Since only one receiver is needed, we are able to concentrate on the overall receiver design on more important aspects of the receiver design such as filtering, IF circuitry, squelch and audio circuitry Concentrating on these critical areas of a receiver design yields superior performance over switching diversity.

The superior performance is easily verified by a simple shoot-out with range and audio quality tests. Generally, under the same environment EV systems will go nearly twice as far as competitive models in a similar price range.

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