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Equipment Solutions: PA Switching

Multiple power amplifiers (PA’s) are often used to increase the total transmit capacity and/or provide redundancy for the transmitting system. Changing the PA’s between dummy load for test and antenna(s) for broadcast requires high voltage and high current switching with read-back and monitoring to ensure safe and reliable transmit capability.

Hi-Q engineers can provide the appropriate topology for reliable PA switching, including power summing to combine the RF from multiple PA’s. The broadcast will remain active while individual PA’s are switched to test mode, and the control can be manual or automatic.



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