The direction of the balcony is good. What's on the way to Śrem?
They must have known about the change. The question remains whether they had any idea what to do with the antenna installation... Most administrators have no idea about the installations they support. But they know Excel very well.
We return to the starting point: a borrowed decoder and a socket. If not, report it to the administrator. After all, it's your money....
The author did not even give an approximate location, but knowing the realities of Poznań, you must not underestimate the "small" 20 kW lighting ONLY!!! MUX3 from Piątkowo, effectively hindering the reception of other MUXs in the UHF band throughout northern Poznań. And MUX8 in Poznań must be received, unfortunately, from the local transmitter at the University of Economics, the range of MUX8 from Śrem is basically only to the A2 motorway. And rather on two antennas and not some kind of invention of a quasi-broadband.