A combined 118.7-119º Legacy LNB has a frequency range from 11.7 to 12.7 GHz vs 12.2 to 12.7 GHz for a normal LNB, and a LO frequency of 10,750 MHz vs 11,250 MHz for a normal LNB.
They use it for FTA receivers, where they can adjust the LO frequency, but it will not work with a subscribed...