Downstream signal strength has dropped significantly over the last 30 days
Modem: Motorola MB8600 (firmware 8600-18.2.12)
Location: Lexington, KY
Hi. I'll prefix this post by saying this doesn't seem to be a problem, yet, but since I telecommute full-time, I'm trying to be proactive to avoid problems in the near future.
I have a cron job that logs into my modem's admin page and grabs the signal strength info every 60 seconds and stores the data into a RRD database. This lets me plot things like signal behavior over time. Over the last 30 days, the downstream signal strength has steadily decreased.
There are no splitters between the modem and the point where the RG6 enters the house (see below).
If we look at the signal behavior over the last 360 days, we see that back in August 2022, all channels except for one were more or less equal-strength. Starting in September 2022, something happened and the strengths began to diverge and they -really- started to diverge in December 2022. (The jump in July 2022 was from me removing the only splitter from the path)
So if the trend over the last 30 days continues, I expect some of the channels to fall below the -15dB threshold sometime in the next 5-6 weeks.
For what it's worth, here are the current values as reported by the modem:
Is this behavior suggestive of cable damage somewhere? As I wrote earlier, I work remotely so I'd like to get ahead of the problem before it becomes a problem. Is suspect, though, that Spectrum phone support won't do anything until there's an actual outage.