Can i split the coax cable going to my cable modem to attach a TV there ?
Usually, however it is not a good idea to do so. Every splitter on the cable between the can and your cable modem reduces signal strength. If you must split the cable going to your cable modem, you should use high grade 2GHz splitters, and because of the lower signal level the modem might not synch at all, or you might experience some packet loss and speed degradation. Depending on your installation, there also might be some filters on the line preventing the operation of both TV and the cable modem on the same cable.
