Thread: Splitting cable before modem

I have one cable outlet in my computer room, and it is currently hooked up directly to the modem. At the outside box, there is a 4-way splitter with 7db legs, 1 going straight to the modem outlet, 2 going straight to tvs, and 1 going to an unused upstairs outlet that I just found out about now when researching this post (I thought I had a 3-way splitter)!

Here are my current modem levels:

Downstream Receive Power Level : -1.5 dBmV
Downstream SNR : 39.3 dB
Upstream transmit Power Level : 43.5 dBmV

I'm paying for a double play package (tv/hsi). I was thinking about getting a tuner card for my PC (which is 2 feet away from the modem and coax outlet), and obviously, the easiest thing would be to put a splitter on the outlet, and have coax from the splitter going to the modem and the PC tuner card. But from what I have read people do not suggest splitting the line going to the modem.

Now if what I want to do isn't recommended, I guess I can live with that, but I'm trying to get advice about what to do (other than running another cable and cutting another wall box into the wall). Would it help if I got a -9db tap splitter, and have the tap going to the PC tuner and the other leg going to the modem? What if I got a 3-way splitter at the box outside, and got rid of the unused cable outlet/4-way? I could also get a 3-way for outside with 3.5/7/7, and hook the modem cable up to the leg with less loss to make up for the indoor splitter? But I'd rather not mess with the outside wiring if possible.

I guess I could just put a splitter before the modem on my current configuration and see what happens to my levels, but I figure I'd ask for advice before experimenting in case I need to purchase a special splitter, and so I am better informed. Anyway, thanks for any help you can offer!

put a 2-way coming out of the outlet.