Alaskansnowbirds said:
SD and not DVR then I think you can use any port you want and it should work. If I'm wrong I'm sure someone will jump in and correct me.
That's correct, it does not matter, if all the LNB's are the same. Technically, if connected to active boxes, each LNB could be used simultaneously for service on the same dish. However, with the different Bands and Satellites, the HD systems may have different freq's There are many articles and video's on the internet that explain the various systems.
Here is one of the articles that I found:
To receive all of the DirecTV HD channels you must have, at minumum, a triple LNB that receives transmissions from the DirecTV satellites at 101, 110 and 119 degrees West longitude.
The DirecTV satellite dishes which support the triple LNB include:
DirecTV Phase II Plus Dish
DirecTV Phase III Dish
Alternative, for future compatability with DirecTV?s new Ka Band MPEG-4 HD programming, you can use the AT9 MPEG-4 Compatible Ku/Ka Band dish with five LNBs.
at9 mpeg 4 compatible ku ka band Choosing a DirecTV HD LNB
With an older satellite dish with only one or two LNB?s, you will be able to receive some HDTV programming. However, if you are spending the money to upgrade to HDTV, the cost of a new satellite dish is negligibile in comparison.
It is impossible to tell you which HD channels are broadcast from which satellite, as DirecTV is able to change these assignments at any time and without notice
