sorry
sadoun i think dishpro lnb or any echostar lnb will not feet on the
dtv arm , for 121 you also need low power lnb ku band, dtv 18" dish will not work , Three reasons: Problem number one is, the Polarity sceme used by the satelites at 105 and 121 are different from the other Birds in use by Dishnet, DTV or Bell. The use a Horizontal/Vertical style of polairty and not the circular system used on the regular satelites.
Number Two, is simply, the 18" isnt large enough. The Transmitting power of both birds is significantly lower than a regular DBS satellite, and a dish of at least 24" is needed for an acceptable signal.
Third, the satelites at 105W and 121W transmit in the KU FSS Band, which is a different range of frequencies used by the conventional DBS satelites, refered to as the "DBS Band"
solution: get your self a super dish or There are a couple dishs FTA that sadoun sell .also , a popular one is to use a retired Primestar dish, or any other convential dish and LNB used for KU satelite reception.
Primestar dishes came in 2 styles, first was a round off-the-shelf channel master dish with a primestar logo, NOTE: The superdish LNBs are all Dishpro only. Any legacy IRDs you wish to connect will require an Dishpro adapter.
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