When a directional antenna system includes a main and standby transmitter or more than one operation directional pattern, RF contactors are incorporated into the RF networks to facilitate high speed switching of transmitters or patterns via a rack mountable controller. The controllers are offered as an electromechanical relay design or as a Programmable Logic Controller(PLC) based design with remote control or web access features. Depending on the transmitter power level, the antenna matching units can be supplied in weatherproof enclosures, in pre-fabricated buildings, as open panel and shelf units or in mocked up form for installation in a customer-supplied tuning house depending on the specific transmission site requirements.
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