Interference as weak signal

I’m getting a lot of reboots because of weak signal. Actually the signal isn’t weak. The field engineer says I’m getting interference from a Dish channel frequency. My channel 9 on frequency 35 is on same frequency as NBC LP channel 3. I receive that channel 3 NBC on frequency 28.
Dish does use 35 instead of 3. When I had dtv 3 was on 3.
Guess I would like to know if a satellite signal is interfering with a antenna signal?