I mainly want to see if I could boost the signal to fix a issue with a down-line splitter . I be unable to get 2 tv to work with a in-house splitter , although they have work ok before . this leave I with connect only one tv , and switch it if I want to use the other tv -lrb- kitchen and basement -rrb- . I hook this new splitter up outside my house at the direct point where the cable line come to the house . this be split by the cable company into a 4-way splitter serve 4 jack in the house . as note , I have split the output from one of these jack to serve 2 other tv along with the one at the jack . this use to work , but stop and I could only go directly to one other tv . so this be a direct replacement for the exist outdoor 4 way splitter . I run a outdoor extension cord to hook up the power supply -lrb- which connect to the splitter via a short co-ax cable you need to supply yourself -rrb- . a green led let you know the splitter be power . I then reconnect the 4 line that run into the house and test everything out . I have no problem with the exist tv or the cable modem . not sure if picture quality be better or not , but it certainly be no worse . I then try out the 2 tv off the splitter and it now work ok , solve my problem . I have 2 analog tv with dta box and 4 hd tv with cable box , plus the cable modem , and everything be work well . I be go to look into run a cable line into the house so I can put the power supply in there , and also get some sort of plastic box to put the splitter in -lrb- like the telephone wiring -rrb- so it be a little more protect from the element . if all of you splitting happen inside the house , then you will not have this issue .