Good morning, getting RV electronics to work properly can be frustrating. I'm not familiar with the brand name mentioned but most likely if it came with your RV it's not quality. I suggest you go shopping for something that fits your heeds and will be less frustrating to figure out. Multiple HDMI inputs and possibly even a smart TV for streaming content, if you are trying to pull channels over the air via the antenna a residential TV will have a much better tuner then the RV models. Manufacturers put low budget models in to save money. Technology is cheap now a day.
Good luck