chinnupepsi4all you are right , this are the resolution which TV would support and not the STB.
As for me_saket question why would STB give these details , it might be just for informative purpose that the STB is able to detect the model of TV and what are the resolution the TV has .
I practically tested yesterday with latest software update for TS HD+ STB , and my TV did not show any 50Hz resolution listed. All the resolution were 60Hz and so forth . It means that my USA brought TV only supported 60Hz resolution and HD+ is still not working .
I checked with TS customer care technicians and they said the STB is updated with 60Hz , which is not true . They asked to setup a technician visit but i am sure that would be of no use.