Upstream power levels still quite high hub 4

[CeriRowlands]

Hello, 

I had a new hub 4 and upgraded to gig1 recently ever since this I’ve noticed my upstream power levels are quite high. I’ve been advised this may be something an engineer needs to have a look at I’ve had random disconnecting issues cause of this I’ve monitored using BQM recently looking fine but these power levels are giving me high jitter on my connection I will post my upstream levels below....

I’ve tried resetting the levels start at over 51 constantly and even have risen to 55 in the past can this get looked into please? 

3.0 Upstream channels

Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID

1	46200000	54.020599	5120 KSym/sec	64QAM	3
2	53700000	53.520599	5120 KSym/sec	64QAM	2
3	39400000	54.520599	5120 KSym/sec	64QAM	4
4	60300000	52.520599	5120 KSym/sec	64QAM	1

3.0 Upstream channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1	US_TYPE_STDMA	0	0	0	0
2	US_TYPE_STDMA	0	0	0	0
3	US_TYPE_STDMA	0	0	0	0
4	US_TYPE_STDMA	0	0	0	0

[CeriRowlands]

Hi again @Paul_DN,

since you replied the network log has stayed the same since I last posted it.....

yeah I see 31 channels just seems weird how it locks onto channel 25 then the list goes 6,7,8,9,10 etc. instead of 1,2,3,4,5 etc it looks like channels 1-5 have basically been added onto the end of the channel list 31-36 are showing. 

if the network log shows anymore problems I’ll post it here. 

[CeriRowlands]

Also like to add I’ve been browsing forums and when other people post their downstream channels they seem to in order unlike mine I’ll post them again...you can clearly see channels 1-5 missing and added onto the end.....

3.0 Downstream channels

Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID

25	331000000	6.300003	38.983261	QAM256	25
6	179000000	6.800003	40.946209	QAM256	6
7	187000000	6.800003	40.946209	QAM256	7
8	195000000	6.900002	40.366287	QAM256	8
9	203000000	7.000000	40.946209	QAM256	9
10	211000000	7.000000	40.366287	QAM256	10
11	219000000	7.099998	40.366287	QAM256	11
12	227000000	7.099998	40.366287	QAM256	12
13	235000000	7.000000	40.366287	QAM256	13
14	243000000	7.099998	40.366287	QAM256	14
15	251000000	6.900002	38.983261	QAM256	15
16	259000000	6.900002	38.983261	QAM256	16
17	267000000	7.000000	38.983261	QAM256	17
18	275000000	6.800003	38.983261	QAM256	18
19	283000000	6.500000	40.366287	QAM256	19
20	291000000	6.199997	40.366287	QAM256	20
21	299000000	5.800003	40.366287	QAM256	21
22	307000000	5.900002	38.605377	QAM256	22
23	315000000	6.099998	38.983261	QAM256	23
24	323000000	6.300003	38.983261	QAM256	24
26	339000000	6.099998	38.983261	QAM256	26
27	347000000	5.900002	38.983261	QAM256	27
28	355000000	5.800003	38.983261	QAM256	28
29	363000000	5.599998	38.983261	QAM256	29
30	371000000	5.500000	38.983261	QAM256	30
31	379000000	5.300003	38.983261	QAM256	31
32	387000000	5.300003	38.605377	QAM256	32
33	395000000	5.300003	38.983261	QAM256	33
34	403000000	5.099998	38.605377	QAM256	34
35	411000000	5.099998	38.605377	QAM256	35
36	419000000	5.199997	38.605377	QAM256	36

3.0 Downstream channels

Channel Lock Status RxMER (dB) Pre RS Errors Post RS Errors

25	Locked	38.983261	0	0
6	Locked	40.946209	0	0
7	Locked	40.946209	0	0
8	Locked	40.366287	0	0
9	Locked	40.946209	0	0
10	Locked	40.366287	0	0
11	Locked	40.366287	0	0
12	Locked	40.366287	0	0
13	Locked	40.366287	0	0
14	Locked	40.366287	0	0
15	Locked	38.983261	0	0
16	Locked	38.983261	0	0
17	Locked	38.983261	0	0
18	Locked	38.983261	1	0
19	Locked	40.366287	0	0
20	Locked	40.366287	0	0
21	Locked	40.366287	0	0
22	Locked	38.605377	1	0
23	Locked	38.983261	0	0
24	Locked	38.983261	1	0
26	Locked	38.983261	0	0
27	Locked	38.983261	2	0
28	Locked	38.983261	1	0
29	Locked	38.983261	0	0
30	Locked	38.983261	3	0
31	Locked	38.983261	1	0
32	Locked	38.605377	5	0
33	Locked	38.983261	4	0
34	Locked	38.605377	7	0
35	Locked	38.605377	5	0
36	Locked	38.605377	9	0

3.1 Downstream channelsChannel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)

39

96

4K

1880

QAM4096

424

3.1 Downstream channelsChannel ID Lock Status RxMER Data (dB) PLC Power (dBmV) Correcteds (Active Profile) Uncorrectables (Active Profile)

39

Locked

41

5.5

51275705

0

[gitty]

Your modem has just locked onto a different bonding group. There are more channels than your modem can lock onto, so it can only use a subset of them. It's normal.

[Tazz]

2 things the brown box is just that its a brown box that covers the connection. Other is if you factory reset the hub 4 the channel numbers should line up.

[gitty]

---

@Tazz wrote:

Other is if you factory reset the hub 4 the channel numbers should line up.

---

That depends on the CMTS. If it assigns the same bonding group again, it will be the same.

[Richw1982]

Looking at your levels I would say the network could be out.  Your forward levels are fine around +4 so would expect your Return levels to be around 42-45 on a balanced network.  The fact your forward levels are mid range and return levels are too Low is pointing towards a network alignment issue and would require an engineer visit to correct

[CeriRowlands]

Hmmm well I had a engineer the other day they checked all internal wiring even changed a splitter for me everything was good internal wise...always had a forward path 6db on router cause my downstream goes stupid high otherwise like around the 10ish mark...anyway engineer went to cab and found out my connector was a blue one apparently they are years old lol even got told it was black it was that bad so that got changed and the upstream dropped from 51 to 41 which I assume is perfect now before the change my downstream was around the 4 mark but they are now around 7ish since the visit but they seem in spec and so do the upstream levels currently fine the engineer decided to keep the 6db attenuator on the router as the downstream would fly straight out of spec otherwise probably talking like 13+ on downstream without it connected. But yeah if any virgin member sees this can you check to see if my return levels are to low by any chance? 

[CeriRowlands]

Looking at my Snr today still the same as before it’s the lower side when downstream still on medium to high range will I need to get this adjusted with a engineer? 

[gitty]

38 dB is a normal number for SNR.

52-54 dBmV upstream is a bit high, but a 3.1 modem has more power than a 3.0 modem, so it should be able to handle it for now, if it doesn't get worse.

[CeriRowlands]

@gitty, 

no upload is now around 40ish mark after last visit so they are good someone is saying my downstream is on mid range while my Snr is at a low range so it’s a bit out.

anyway I’ve been recording my BQM looks likes there’s quite a few average latency spikes it’s not horrendous but there’s definitely something not 100% perfect.

https://www.thinkbroadband.com/broadband/monitoring/quality/share/c8b17039ec0ff883682ed3cea63e43ad413d604e