how about a boost?

Okay - this is really nerdy. When we purchased our home, all of the cable connections ended in the garage as bare-ended wire. I decided to design the cable system to provide the strongest signal to the cable modem (for our Internet connection), the second strongest connection to the family room (for our HDTV), and leave the left-overs for the rest of the house.
The resulting signal in the Master Bedroom was not satisfactory. Some of the local channels suffered from through-the-air interference and some of the higher channels (above 60) were not clear.

To overcome the low signal challenge, I have installed a Motorola cable booster. The booster is rated to over 1 gigahertz and allows outbound signals (from cable modems and cable boxes) to pass back upstream.

I elected to only amplify the television signals, not the cable modem signal. I did this for several reasons: 1) The booster is not outdoor rated and the first splitter is outside 2) The cable modem is performing quite well (SNR +37db) 3) The Comcast installation outside that sends the signal to the cable modem was done well

The installation only took about ten minutes and effects all of the television outlets in the house.

The result? The Master Bedroom television looks great. I was skeptical the booster would make a big difference, but the results are noticeably better. The picture on the HDTV feeds were already amazing; I don't see any difference there. Side result - the inbound feed to the cable modem jumped up by 3db to +4db above standard. The SNR continues to bounce between 37db and 38db.