Just recently switched from DirecTV to Dish Network. Had two receivers with DTV four rooms worked great good picture. The new Dish Network has Dish 500 one receiver with TV2 (two) remodes same as DirecTV. The second room with TV2 is HD tv signal is weak picture not as good as with DirecTV. Third room with TV2 not HD tv but still a lot of snow on picture not as good as DirecTV was. Forth room with TV2 no signal at all with a 20 year old Magnovox tv that worked with DirecTV. Not using any splitters only PVDP2 diplexers. I was not at home when the tech was on site. So do I need to boost the single with something other than a PVDP2 or what. Dish 500 has two coax cables the tech only used one to the in house distribution network box where the PVDP2's are located three or them there is also one PVDP2 connected to the 622 receiver. Any advice for a better single excluding switching back to DirecTV. Thank you any and all assistance is appreciated. RDSpears.