( former cable tech )
i would not add a 4th splitter as you will lower the signal coming in and will raise the return ( signal going out ) . for internet a modem is happy with the forward signal at -8 to +4 and the return level you don’t want to go any higher than 52......it can go to 54-55 but that is really pushing it. if the return level is to high, then this is where you will see pixels and streaming will have issues.
then you have to also look if you run the line yourself, if you don’t do correctly, you could cause noise out on the plant, which in turn would cause your neighborhood to have issues and you could actually cause an outage.
there is more.....but this is just part of it.
i would not add a 4th splitter as you will lower the signal coming in and will raise the return ( signal going out ) . for internet a modem is happy with the forward signal at -8 to +4 and the return level you don’t want to go any higher than 52......it can go to 54-55 but that is really pushing it. if the return level is to high, then this is where you will see pixels and streaming will have issues.
then you have to also look if you run the line yourself, if you don’t do correctly, you could cause noise out on the plant, which in turn would cause your neighborhood to have issues and you could actually cause an outage.
there is more.....but this is just part of it.