@odysseus+2020
The equipment in your images confirms that your communal management have installed a Triax TDSCR504 dSCR multiswitch to support residents that want a feed suitable for a Sky Q receiver.
Two of the output ports, ( 1 & 2 ), appear to be unused and are both terminated with a 75 ohm dummy load, leaving output ports 3 & 4 connected to residents flats and capable of supporting Sky Q receivers.
Alas, no attempt has been made to supply a local 20v supply of power into this Triax TDSCR504 dSCR multiswitch.
Without a much more detailed analysis of how this device is presently receiving its power it is difficult to decide if the two 'DC blocks' inserted in series with the 'Trunk' feeds will mean that it is not receiving any power from the communal Integrated Reception System (IRS) and it will be relying on taking the power that it requires from any satellite receiver connected to its output ports.
Without measuring what current is actually being drawn from any Sky Q receiver connected to either output port 3 or 4 I can only guess that there is a distinct possibility that a method of supporting the limited power supply capability of Sky Q receivers will require to be adopted in each residents flat.
Output port 3 has a coaxial cable that appears to be terminated by a screw on 'F' type connector, and Output port 4 has a coaxial cable that appears to be terminated by a compression 'F' type connector, suggesting that two different residents are presently connected to this dSCR multiswitch by just one coaxial cable.
This would limit the available options to remotely power this device from individual residents flats to using 'Power Inserters', if the dSCR was not being powered from the 'Trunk' distribution cables.
At the end of the day, this dSCR multiswitch requires to be powered, and if this power is going to be extracted from a Sky Q receiver, apart from possibly a Sky Q V3 device which claims to be able to supply double the current that the previous Sky Q receiver designs could provide, then individual residents will require their Sky Q receivers to be supported by having 'Power Inserters' provided in each flat where a Q receiver has been installed.
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It is not always immediately obvious when a new Sky Q receiver installation will initially work fine for a short period of time, and then start to have problems attempting to continuously supply power to a dSCR multiswitch, because initially with just one Single Cable Router (SCR) 'User Band' instructed to be powered the current from a nominal 11v source will be around 170 mA, as more 'User Bands' are requested to turn on to provide additional feeds for its tuners, this can quickly rise to around 220 mA if 10 'User Bands' have been instructed to power up. This often explains why some subscribers inform us that their overloaded Sky Q receivers often work for another limited period of time whenever they have been powered down and the load on their Sky Q receiver is temporarily reduced to supporting a relatively few 'User Bands'.
Godfrey.