Be sure that you have the OTA TV power supply turned off if you want to watch Cable. Both signals come into the same wall plate. With the power on (light lit) you watch OTA TV. With the power off (light not illuminated) you should be able to watch Cable. Using the satellite connection should only be used when you have a ground mounted satellite TV antenna and the output would be to a satellite TV receiver.
What I post is my 2 cents and nothing more. Please don't read anything into my post that's not there. If you disagree, that's OK.
Can't we all just get along?