yes, but when the STB is turned on, the main control is in its hands. That means if U are watching Polarisation H, high range (ex 12700 H ...) , in your TV U can lock only Channels High range pol H, not low range pol H and the whole pol V and so on...
If the STB is turned off, the TV has the main control of your LNB and switches...
My advice: TWIN LNB, 2 cables, TV and STB have both full control