Advertisements Let me begin by telling you guys that I went to comcast cable. I went there cause of Hd. But I have had nothing but problems with thus far. Regarding their piece of crap, and I mean peice of crap dvr. I am on my fourth one and I switched to Comcast about 4-5 months ago. Anyway can somebody please expain to me in detail how this hd signal works with directv. With comcast I don't need any external antenna for me to receive the signal. I was told with direc I would. And I was also told when I am watching tv to go to a channel that has hd I would need to switch something on the box.I am not quite sure on that. With Comcast all I have to do is just go to the channel that broeadcasts hd. I don't want a ugly external antenna sitting around whether it being a 1960's rabbit ears on top of the tv or a wall hanging antenna. I was hoping it would be a setup like Comcast. And if I do come back would I still be able to get the tivo r10. I heard to many stories on the r15. Thanks for all your help.