All current Directv branded HD boxes do native pass through. You can select native on or off, and select resolutions as well. Samsungs (I'm not sure of the newer sets) do not accept 480i over the HDMI cable, so I have 480i/p turned off. All SD channels are upconverted to 720P (set's native res) and 1080i and 720p are sent native. This way there is no 480i>480p>720p converting.