It's been quite a while sine I understood power levels, etc. when relating to cable modems. I've had some issues with my internet connection during the past few weeks and I feel that there might be some sort of issue pointing toward my line quality. I get frequent hangs when requesting pages, disconnects, failure to connect via the modem to the WAN, etc. When I do speed tests, they start off well but usually are unable to finish because I loose connection.
To make a long story short, here are my levels.