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That's a long time! Thus, one suspects reflections in the cable from the source.
Find a source you can connect to the set with a very short, less than one foot, cable.
If your signal is bigger than needed, as a test try a 6 to 10 dB attenuator with correct resistive
matching at the receiver and see if the ghost gets much weaker.
Last edited by dtvmcdonald; 07-14-2019 at 06:08 PM.
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