No a Separator takes a single line, and splits it into 2 to connect to Sat 1 and Sat 2.
That avoids the need to Run 2 lines from the dish.
But Ive never seen 1 coax to the back of a duo receiver.
You need to use Port 1, 2 or3 on your LNB, take off that tripleplexer, put in a Separator, and have 2 small coax jumpers going to 1 and 2 on the back of the 722.
Or if you insist on using that tripleplexer, you still need a jumper from sat 2, going to sat 2 on the 722
Doesn't matter if its for 2 rooms or not, its still a dual tuner receiver.
Another issue I see, your Check switch shows you have a Separator, when in fact you equipped a Tripleplexer .
I dont even see OTA connected to it.
So there is another issue.