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Old 14th June 2014 | 11:37
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RaRadar
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Joined: May 2002
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From: UK
ADS-B works on 1090 MHz for the downlink whereas the secondary radars use 1030 MHz for the uplink and also 1090 MHz for the downlink. If the 'interference' was on 1030 MHz the secondary radars wouldn't get a reply from the transponder but ADS-B receivers would be unaffected.

RR
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