The KeyTV module is an active powered unit. Since your able to get OTA channels and not park the issue may be with the module box or the feed cable you are using at the park.
If that cable is good then KeyTV module is bad.
Use this and it will help you identify the issues...
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2007 GMC Classic club cab 4x4 Duramax LBZ
2014 Alpine 3010 RE. 34 foot fifth wheel
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