Box is connected thru HDMi to the TV and with the internal antenna I am getting true HD picture but sometimes Channel 2 Freezes and then you have to restart the box. I kept trying different positions for the antenna and it works fine only if antenna is kept outside. So, I decided to try the jack on the wall which is connected to the VHF Antenna on the roof and to my surprise I still get crystal clear picture. Can someone please explain how I am getting Freeview HD with VHF aerial connection??