upstream
what is the maximum upstream (dB)myou should accept on the hub 5?
No problem there either. Everything suggests you have an excellent connection.
Forum Discussion
About 50.
35-49 dBmV might be seen as a typical range.
If you are seeing 50 dBmV or much above the Hub is working hard to be heard at the street cabinet, and this may result in upstream channels dropping out - we expect to see 4 to 6 DOCSIS 3.0 channels connected at QAM 64.
For RFoG connections there is no DOCSIS 3.1 upstream channel, but for CATV / Coax connections there is usually a single DOCSIS 3.1 channel ( as well a the 4 to 6 DOCSIS 3.0 channels ) connected.I have two attenuators one at the virgin box outside and one on the hub just to bring my specs in range.
But it is causing me alot of lagg in games. is this because I have to have two attenuators?
The attenuators are used to correct the signal levels so the Hub operates in a preferred range.
It does not add Latency to your connection.
Lag in games is most commonly a problem of using home Wi-Fi especially if extra Wi-Fi Repeater hops are involved,
connections to games servers that are half a world away and game server overload.What has the attenuator done to the downstream levels?
The two attenuators one on the back of the hub 5, and one outside in the virgin box work together Brought the downstream levels down to around 7-8, while not increasing the upstream level too much.
upstream is in the 4-5 range max.
upstream is around 40.1 dB to 45 dB max.
I guess the question is, as long as your specs are in range, but you also have two attenuators, can we rule out the attenuators causing issues? As my in game latency is good, but its just a strange layer of lagg that is causing me issues over all my games, I tried switching ethernet cables. which made me think its the attenuators causing a delay?
Before I only had one attenuator, and my services worked fine, but there was an area fault and im guessing they fixed it and now that pushes too much power into my hub increasing the downstream levels, so the engineer just stick another attenuator on my connection to bring the downstream levels down.
When I had my services installed last year it was fine and I averaged around 7-8 DB on downstream and average of 38 dB on upstream, then this december My downstream went way up causing alot of issues.
Im guessing the engineer doesn't want to get to the root cause of the issue but just slap another attenuate on to suppress the connection
Upstream and Downstream power levels are fine.
What we don't know are if there are issues with Downstream errors or degradation of upstream Modulation modes.3.0 Downstream channels
Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID1 370000000 7.8 39 QAM 256 2 2 362000000 8.2 39 QAM 256 1 3 378000000 6.3 39 QAM 256 3 4 386000000 5.8 39 QAM 256 4 5 394000000 5.9 39 QAM 256 5 6 402000000 5.9 39 QAM 256 6 7 410000000 5.9 39 QAM 256 7 8 418000000 5.9 39 QAM 256 8 9 426000000 5.7 39 QAM 256 9 10 434000000 5.7 39 QAM 256 10 11 442000000 5.6 39 QAM 256 11 12 450000000 5.7 39 QAM 256 12 13 458000000 5.6 39 QAM 256 13 14 466000000 5.5 39 QAM 256 14 15 474000000 5.4 39 QAM 256 15 16 482000000 5.3 39 QAM 256 16 17 490000000 5.2 39 QAM 256 17 18 498000000 5 39 QAM 256 18 19 514000000 4.9 39 QAM 256 20 20 522000000 4.9 39 QAM 256 21 21 530000000 4.9 39 QAM 256 22 22 538000000 4.8 39 QAM 256 23 23 546000000 4.8 39 QAM 256 24 24 554000000 4.8 39 QAM 256 25 25 562000000 4.7 39 QAM 256 26 26 570000000 4.9 39 QAM 256 27 27 578000000 4.8 39 QAM 256 28 28 586000000 4.7 39 QAM 256 29 29 594000000 4.6 39 QAM 256 30 30 602000000 4.6 39 QAM 256 31 31 610000000 4.6 39 QAM 256 32 3.0 Downstream channels
Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors1 Locked 39 0 0 2 Locked 39 0 0 3 Locked 39 0 0 4 Locked 39 1 0 5 Locked 39 0 0 6 Locked 39 1 0 7 Locked 39 0 0 8 Locked 39 2 0 9 Locked 39 3 0 10 Locked 39 1 0 11 Locked 39 2 0 12 Locked 39 3 0 13 Locked 39 3 0 14 Locked 39 2 0 15 Locked 39 2 0 16 Locked 39 8 0 17 Locked 39 11 0 18 Locked 39 6 0 19 Locked 39 8 0 20 Locked 39 8 0 21 Locked 39 10 0 22 Locked 39 5 0 23 Locked 39 4 0 24 Locked 39 5 0 25 Locked 39 7 0 26 Locked 39 6 0 27 Locked 39 12 0 28 Locked 39 10 0 29 Locked 39 9 0 30 Locked 39 10 0 31 Locked 39 6 0
Downstream: no lower than -6dBmV and no higher than 10dBmV - Close to 0 is optimal. SNR >33 The actual DOCSIS spec allows a range of -13 dBmV to +17 dBmV
Upstream: no lower than 31dBmV and no higher than 50dBmV - 44dBmV -46dBmV is optimal. FTTP 27dBmV to 45bBmV
Attenuators fitted by VM ONLY affect the downstream power levels.
it says my my modem code is using docsis 3.0. but I am on hub 5 on the 1000 mbps package, i should be on docsis 3.1
Palm771 wrote:it says my my modem code is using docsis 3.0. but I am on hub 5 on the 1000 mbps package, i should be on docsis 3.1
The modem is bonding bonding 3.1 channels (1 down, 1 up), so everything is in order. Your modem just uses a 3.0 channel as its primary channel. That is also fine, you running 3.1 anyway. 🙂
