Fuzzy cable channels

Cable channels in my 2014 international AS always appear fuzzy and the sound works for some but not all. Despite connecting to cable in dozens of RV Parks and campgrounds in 8 states over the past 5 months of full-timing, I get the same result. Local TV stations typically work OK.



I connect the cable; then select "cable" under the Menu (Antenna); then I select Start in the Auto Program to select cable channels.



Any suggestions would be appreciated.

Thanks,

Rob