It's due to the encoding used. It's not the old-fashioned DVB-S QPSK, that we have been accustomed to but DVB-S2 multistream, which is using 16APSK encoding with an FEC of 8/9.
In a nutshell, the combination of 16APSK and an FEC of 7/9 requires a far higher signal level and quality than we have been used to.
DVB-S2 allows for more complex encoding systems. The advantage for satellite operators and service providors is that this in turn allows more channels per transponder, and in the case under discussion, multistream. It's all a matter of economics and profit.
I posted a link or two in another thread, which led to a discussion of the constraints when using this type of encoding.
These might help .... and .
Bookmarks