Often your local cable office, if you have one, will give you everything you need for free, splitter, extra coax cables, ... Specifically, a 2 port splitter will be -3.5 dB per port.

I've recently gotten Optimum Online and it seems that my cable modem (a motorola SB4100) does not work when I run it through a 2-way splitter (the other split going to my TV), but works when I run ...

A splitter reduces the signal by at least 3.5 dB, which results in two signals with less than half the power of the original. Some splitters have even more loss.

If your business gets cable TV and high-speed internet access from the same company using the same line, you can use a coaxial splitter to connect your internet router and one or more cable boxes ...

In a feature that's unique among splitters, the IMX 2228 surface-mountable, two-way power splitter offers the same 3-dB split at any of its three ports. Mounted on an alumina substrate, it ...