IowaCowboyWant to go back to IowaPremiumReviews:
Maine: Dropping signal levels. I've been noticing at Grandma's house that her signal levels are dropping. She has an aerial drop that goes to a grounding block in the grey box then to a 4-way splitter in the basement. From there, last summer the signals were -2.0 or something. Then I checked it again when I installed the new DPC2203 and I noticed the signals were down to -8.5 or so (this is out of spec on Comcast, I don't know what TWC wants) so I put a two way splitter on the incoming line to the modem and put the three TVs on the existing 4-way and I capped off the fourth post with a terminator. After that fix, I got the signal up to -3.2 with a 37.0 SNR.
I am wondering if Sandy could have damaged the drop or what could be causing the plummeting signals.
I've experienced ImOn (when they were McLeod USA), Mediacom, Comcast, and Time Warner. They are much better than broadcast TV.
I have not and will not cut the cord.
DrDrewSo that others may surf.
Probably just temp related signal variation, mixed with amplifier AGCs (auto gain controls) slightly out of adjustment. This tends to affect aerial lines more since they're subject to greater temp variation.
FCC specs allow for 8dB variation from summer to winter for analog channels. Digital channels are actually more forgiving in signal variation which is why DOCSIS spec is +15 to -15.
TWC specs +12 to -12 in most areas, sometimes a couple dB better, so you're fine.
Two is one, one is none. If it's important, back it up... Somethimes 99.999% availability isn't even good enough.