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What is suppression in relation to DMEs and Transponders?

April 26, 2017dmes relation suppression transponders

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What is suppression in relation to DMEs and Transponders?

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DME and transponder units operate on frequencies that are close to each other. Therefore, the two can interfere with each other from time to time. This is especially true when there is less than 3 feet of distance between the two antennas. When interference is encountered, a suppression line should be installed the DME and transponder. The suppression line disables the DME for a short time while the transponder is interrogated. This prevents the DME from interfering with the transponder.