Tucson: cable modem drops connection a couple times a day

Can you show your upstream levels? Your signal levels look off. First there is a wide separation between the highest power downstream channel and lowest. Should be no more then 1-3dB. Second, there seems to be some noise on channel 13(873Mhz). How does the coax get from the street to the room the modem is in? You mention a splitter. How many and what kind? Do you have TV service? Any amps or filters?