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Old 14th Jun 2014, 11:37
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RaRadar
 
Join Date: May 2002
Location: UK
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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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