Reasonably changing existing SAT/cable connection botch work

Welcome to the forum . Nice to read such detailed and technically good answers right from the start :)

I also fully agree with the comment on the sketch.

But now here comes the but, because I think nominal levels etc. are completely irrelevant at first. I suggest just pragmatically trying it out for only one TV. Then you can see if the wiring is still usable and can still consider multiple TVs later. (How many TVs do you even want to operate simultaneously? The trend is moving towards streaming and such, but that is another topic).

After the first fixed test, of course, do the safety-relevant grounding properly. That is a topic you must not neglect or shortcut!

Welcome to the forum . Nice to read such detailed and technically good answers right at the start :)

Thank you for the welcome, but this is not really a debut. Under the nickname , I habitually linked a standard, which led to my excommunication. After a long abstinence, I have once again given my two cents while observing the rigorous forum rules.

During a renovation, it cannot be an unsolvable problem to lay a high-shield cable according to Class A+ between HÜP -> 1st earth block -> house connection amplifier -> 4-way splitter or distributor -> 2nd earth block and to connect the whole assembly with at least 2.5 mm² copper (for protected installation) or at least 4 mm² copper (unprotected) to the main earthing busbar of the protective equipotential bonding, which is also mandatory in every old building.

I have not seen earth blocks yet. I have the old invoice for the installation of the satellite system, but it does not mention anything about that either. But since we are starting at the HÜP, it’s also about the BK connection, right? The situation is that on the ground floor the house connection socket is installed. Whether there is any grounding there or how it is done is, I think, up to the cable network operator? The amplifiers/distributors are still screwed on in the attic but no longer connected. Between the HÜP and the distributor there is an old coaxial cable, partly embedded in plaster and partly lying in an empty conduit (not connected on either side). Pulling a new cable there would indeed be a considerable effort. If this is necessary, I would forgo it. I just wanted to clarify whether I have to plaster over the old sockets because they are unusable anyway (of course, I would not fully plaster them over, but it makes no sense to install a new satellite socket there as part of the socket renewal if I cannot use it anyway) or what I need to install there to still use the old cables for internal distribution. Speaking of grounding... that reminds me: I have already wondered why a coaxial cable is laid in the house connection box (that is another one; there is neither the BK connection nor a satellite cable there)... could that be for grounding? I’m sorry about the sketch... I can’t draw well and I also wouldn’t have thought a sketch would be needed for that. What would I need to type into Google to find an example of how something like this could look? You’re not allowed to link anything here anyway. Now I know that the whole system is probably not up to standard, but I still don’t know if/how I can route my satellite signal over the house wiring. I think we’ll leave the BK connection aside for now – it’s not currently being used anyway.

But here comes the catch, because I think the normal level etc. doesn't really matter for now. I suggest simply trying it out pragmatically for just one TV. Then you can see if the wiring is still usable, and you can still think about multiple TVs later. (How many TVs do you even want to operate at the same time? The trend is moving toward streaming and the like, but that's another topic).

Usually just one. The house is big... you could imagine having a second device in 2-3 other places. I would like to do that test. But for that, I would first need to get some connectors or something and also bring an unwieldy device to the construction site (I don’t have a compact second device available). I didn’t know it was such a complex topic... I just wanted to avoid building some adventurous constructions under the motto "youth researches," which any expert could have told me at first glance wouldn’t make sense. I first tried to research how it’s wired myself, but I didn’t figure it out.

The situation is that the house connection socket is hanging in the ground floor. Whether or how grounding exists there is the matter of the cable network operator, I think?

KNB are responsible for network level 3, which ends at the HÜP. For the internal house network level 4 and the mandatory equipotential bonding of each building, the owners/network operators are responsible.

After the normative clarification, the typical ignorance of a layperson can no longer serve as a defensive claim for missing equipotential bonding and grounding.

I merely wanted to clarify whether I need to plaster over the old sockets because they are unusable anyway (of course I would not fully plaster them over, but it does not make sense to install a new satellite socket there as part of the renewal of sockets, which I cannot use anyway) or what I have to install there in order to still use the old cables for an internal distribution.

I regret, but I see neither a connection to the previous comments nor do I understand what you actually want to do.

Speaking of grounding... Something else occurs to me: I have already wondered why a coaxial cable is routed into the house connection box (this is yet another one, there is neither the BK connection nor a satellite cable there)... could that be for grounding?

Your confidence in my clairvoyant abilities flatters me, but I am only an antenna professional.

You are not allowed to post links here anyway.

That's right!

Despite appreciations readable through moderator , the banhammer of the forum inquisition struck me because under the nickname (to this day I do not exactly know why) I presumably habitually linked a standard.

However, it is allowed to post sketches or photos as attachments.

Now I know that the entire system is probably not standard compliant, but I still do not know if/how I can route my satellite signal over the house wiring.

Everything regarding grounding and equipotential bonding of satellite antennas requiring grounding or exempt from grounding has already been explained. Below is an example image of how a BK connection with star cables is included in the equipotential bonding. More once I can finally deduce from meaningful photos what you actually intend.

[ATTACH alt="IEC 60728-11 Ed 5, example figure 6x.jpg" type="full"]56206[/ATTACH]

Regrettably, I see neither a connection to the previous statements nor do I understand what you actually want to do.
[...]
Your confidence in my clairvoyant abilities flatters me, but I am just an antenna expert.
[...]
Submitting sketches or photos as attachments is, however, allowed.

Okok. I got it. I have now tried to draw it. The green ones are the newly installed coax cables for the satellite system. The blue ones are the old cables. The red dots are meant to illustrate that there is a connection there, i.e. the cable is connected there. Everything else is hanging in the air. The round ones are sockets.
My question is whether and how I can connect a green cable to the blue distribution.
Bonus question: Could I then also disconnect the LNB and connect BK without new sockets and major rewiring?
Sorry that it was unclear. I hope it is now explained understandably?