What Can I do to Improve Cable Link/Signal Quality?
The author specifically mentions that he has internet connection problems due to this issue. Finally, I present this clause from the SuperUser FAQ in regards to questions which are not allowed:
electronic devices, media players, cell phones or smart phones, except insofar as they interface with your computer
So, I would suggest this question be re-opened, as it is a valid issue pertaining to computer hardware (the author is seeking a way to improve the signal quality delivered to his hardware cable modem).