I have no experiences with the DBV-S2X tuner(s) thus I'm not be able to give you a good answer to it.

As for the Signal is too strong, to my experiences it may indeed gives some issues with some tuners, but I did not experienced that it not received any channels, rather freezing screens.
But in my case I used a booster while it not needed because the regular dish setup was good/strong enough.
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Doing nothing leads to nothing.

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Will be given here, or on the jb8a8f8 forum and I prefer it in English.
Johnny B.

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