Please wait, I'm coming over...
 |
|
|
Last Changed 9/5/2017 |
||
The selection of a satellite TV dish should consider the number of LNBFs (Low Noise Block Feedhorn) that the dish has. Both Dish and DirecTV uses multiple satellites to deliver their channels. The HD channels from both providers are distributed amongst the multiple satellites. DirecTV does concentrate their SD channels on Satellite 101. DirecTV can say you can get all your channels on that satellite but they will be only in SD. DirecTV has also chosen to use a different frequency for their HD channels. DirecTV uses the Ka band for HD will they use Ku for SD. Dish uses the Ku band for all their channels. Since a dome dish has a Ku LNBF, for DirecTV, a dome can only receive SD signals from satellite 101. Since Dish uses the Ku band for all channels, a single LNBF dish can receive any of the Dish channels, if the single LNBF is moved to the satellite for the channel. Most of the dome dishes have logic to reposition the LNBF to a desired satellite. Most LNBFs have two coax ports, so a single LNBF can connect to two receivers. But the receivers will be limited to the channels on the satellite the LNBF is pointed to. The swinging between channels for a single LNBF dome is automatic. When the satellite box connected to the primary cable connection wants to connect to the other satellite, the dome swings the internal dish. At first blush, the automatic swinging of a dome seems a very good solution. The user does not have to do anything for the satellite change. But there are two satellite box connections. Generally, the primary satellite box connection is in the living room area of the RV while the secondary satellite box connection is in the bedroom. Only the primary connection controls satellite selection, thus a change in the channel of the bedroom satellite box cannot select the other satellite. Also, when the primary satellite box causes a satellite change, the bedroom box loses the satellite it was connected to. This will often induce a shout from the bedroom about “what the heck is going on!” If the satellite receiver is a DVR (Digital Video Recorder), the need to connect to multiple satellites at the same time is important to be able to record and watch live programming at the same time. A multi-headed LNBF dish is positioned so that there is a LNBF for each satellite. A satellite receiver electronically selects the appropriate LNBF for the channel it wants to watch. A multi-headed dish has no conflict issues. For DirecTV HD programming, a multi-headed dish is necessary. Because of the aiming of a multi-headed LNBF dish, there are no "in motion" multi-LNBF dome dishes. "In motion" dishes can be used while the vehicle in under way. |
||
Disclaimer: The information in this site is a collection of data we derived from the vendors and from our personal experiences. This information is meant as a learning guide for you to make your own decisions Best practices and code should always be followed. The recommendations we make are from our personal experiences and we do not receive any compensation for those recommendations. |