Unable to get any signal. Removed all 4 internal antenna connections, connected my antenna, swept 360 degrees no signal at all. Not sure what I'm missing. I'm using a Bolton parabolic antenna

https://smile.amazon.com/gp/product/B07NJNC3MV/ref=ppx_yo_dt_b_asin_title_o07_s02?ie=UTF8&psc=1

with ultra Low loss cable. I'm ready to give up.

Thoughts anyone?