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Forum Discussion
+9dB downstream not good enough?
Connection troubleshooting states "Good Downstream power levels are within -7 to +7 dBmV". However, even at +9dB, my CM1150V was not providing a solid link, my router was frequently loosing connectiv...
If it works fine without the 3 way connector, I'd really be suspicious of the 3 way connector.
You can run your signal hot but it can cause issues and longevity problems.
that's why we recommend it at lower levels.
I see. (Although that same 3-way splitter worked fine with the Xfinity modem). Ok, is there a specific 3-way splitter that is designed to function with the CM1150V? (i.e. can you recommend one that should work with it)? Thank you for your assistance!
Most decent quality ones should be fine. Its not always the splitter. It could be the end connector that it doesn't have caps on it, not being tight enough, etc.
I used to run around that same 13-14dbmv and it worked fine. Then I started to get errors so I used to just use a 4x way splitter for a while but then it started having errors. so I just picked up a signal attenuator and connected that in line. Has been working fine for around 6-8 months. They're not to expensive. I think I picked up a 3,6,9 dbmv attenuator so I could play around with the signal levels.
Thank you plemans. The 3-way splitter was a brand new one installed by Xfinity. And they did also install, I believe it was an attenuator outside the house. All of the cabling was new, all the way out to the pole. I will try to find the best 3 or 4 way splitter I can, and see if that one works. I was just looking at this Amphenol splitter on Amazon (https://www.amazon.com/AMPHENOL-IPGH3M4-VF-Infinity-Premise-Splitter/dp/B07CQTHL33/ref=sr_1_3?crid=1QFSC6DT9ANJF&keywords=coaxial+3+way+splitter&qid=1691683904&sprefix=coaxial+3+%2Caps%2C94&sr=8-3) that has one -4dB hybrid output, 2x -7.5dB hybrid outputs, as well as 4 -12dB MoCA outputs. If it's truely Amphenol, I believe it should be of good quality. I like that it allows for three different levels of dB reduction and would allow MoCA use in the future.
UPDATE 19AUG2023: I received and installed the Amphenol IPGH3M4-VF splitter. I can achieve a solid internet connection using the -4dB H1 port which yields downstream channel power ranges of 10.1-11.2dBmV. I tried one of the -7.5dB ports which yields downstream channel power ranges of 6.8-8.3dBmV however the internet connection is then very poor. It was also poor using the -5dB port on the new 3-way splitter Xfinity had installed. It is confusing to me that the modem is supposed to prefer -7dBmV to +7dBmV, but my particular modem performs poorly below +10dBmV. Does that indicate my modem is faulty? Thanks all... AL