I've got a VIP222, with TV2 in my mother-in-law's room. She's away for awhile so TV2 hasn't been used for the past month. Over the past two days though the TV2 tuner on my receiver has been coming on by itself. Neither neighbor on either side of me has Dish (one is Direct and the other just got Uverse). So what could be interfering with my RF signal and can I change the frequency to prevent this in the future?