increase upstream power

Arris says my upstream power is to low. It should be 45 to 50 and mine is 44 ...

If you insert a 3db attenuator (even a two-way splitter will do) in line with the modem it will increase the upstream power level reading. It will also lower the downstream level by 3db, which may be OK depending on where the downstream levels are now.

What "troubleshooting" do you expect Arris to do? Manufacturers can't really access the systems that communicate with the modem, nor diagnose signal level problems.

Where would I get a 3db attenuator? What type of splitter could I get? I was told not to use splitters. All my downstream levels are around 3 and 4 dBmV.

I have an SBG8300 and I believe it MAY be going bad. My speeds are kind of all over and I wanted them to replace it if it is going bad since it's still under warranty.

Arris told me my provider could fix this from the office. I don't know anything about it, I just use it.

So you believe a 3db attenuator would bump my upstream from 44 to maybe 50? I found a 3 and a 6db.

A 3db attenuator should increase a 44 dBmV upstream to 47 (the attenuation adds to upstream power and subtracts from downstream power). I'd avoid 6 db as that would put you at 50 dBmV which is Comcast's max for upstream power.

Thank you I will try it. I don't understand any of this stuff. Hopefully Arris will talk to me if it works.

I should have said before: Arris' statement that your provider could "fix this from the office" is not correct. It just doesn't work that way. Comcast's systems automatically control modem upstream power to keep the level they receive at 0 dBmV (AKA 1 millivolt). Beyond that, power level adjustments require "boots in the field".

Please do, if you have the chance, let me know how this turns out please. Appreciate it!

I bought a 3db attenuator and you were correct. My upstream levels are about 48 now and my downstream are about -1 to +1. Arris has no excuse not to talk to me now. I really appreciate your help.

My netgear nighthawk cax80 is at a upstream power level of 28dBmV. Should I buy a 15db attenuator to increase my upstream? From my understanding that should bring me to around 43dBmV which should put me in range for the recommended upstream power level.

@cerq123 

That would depend on what the downstream power values are. Are you actually having any connection problems ?

@EG 

My household devices are all connected via wifi and for the most part have stable connections on the 2.4GHz wifi. I mainly use our 5GHz wifi which gives me faster speeds on my desktop and PS5. My issue lies on when I try to game on either device it can sometimes give me spotty connection and packet loss that doesn't last long but can be bothersome and also affects cloud gaming aswell so i would like to see if can decrease and/or eliminate any connection issues on the 5GHz wifi. These devices are in a room directly above from where our modem is. I would also like to mention im in the process of installing ethernet in my home soon.

A few days ago  when i was looking at my gateway settings on my desktop i noticed my cable connection was poor and wondered if this was the root of my problem. I double-checked the connections and everything is good. After running the cable diagnostics it said my upstream power level is at 28dBmV and recommended power levels should be between 30-50dBmV, though I've heard its good to try and get it between 42-48dBmV.

I have attached the power values below.

Upstream Bonded Channels

The downstream power levels are too low to use a 15dB overall attenuator pad. While it may make the upstream power look prettier, it will throw the downstream out of spec. It's a balancing act. I think that the problem may be more of a WiFi connection impairment / interference issue.

understandable, but is the low upstream power level not potentially limiting my speeds in anyway? how would I go about increasing my upstream power to recommended levels?

You would need a tech to come out to properly balance the line if they determine it actually needs it.