Virgin Media Community

[daz28]

I’m seeing a nice variety of upstream modulation, 16, 32 and 64 QAM. Does this signify an issue?

Channel	Frequency (Hz)	Power (dBmV)	Symbol Rate (ksps)	Modulation	Channel ID
1	60300020	51	5120	64 qam	1
2	53700000	52	5120	16 qam	2
3	39400000	51	5120	32 qam	4
4	46200000	50.3	5120	32 qam	3

My Downstream Power levels seem a bit off also:

Channel	Frequency (Hz)	Power (dBmV)	SNR (dB)	Modulation	Channel ID
1	138750000	-6.5	36	256 qam	1
2	146750000	-6.5	36	256 qam	2
3	154750000	-6.5	37	256 qam	3
4	162750000	-6.5	37	256 qam	4
5	170750000	-6.5	37	256 qam	5
6	178750000	-6.7	37	256 qam	6
7	186750000	-6.5	36	256 qam	7
8	194750000	-6.5	37	256 qam	8
9	202750000	-6.5	37	256 qam	9
10	210750000	-6.5	37	256 qam	10
11	218750000	-6.9	37	256 qam	11
12	226750000	-7	36	256 qam	12
13	234750000	-7.5	36	256 qam	13
14	242750000	-8	36	256 qam	14
15	250750000	-7.9	36	256 qam	15
16	258750000	-7.2	37	256 qam	16
17	266750000	-6.5	37	256 qam	17
18	274750000	-6.5	37	256 qam	18
19	282750000	-6	37	256 qam	19
20	290750000	-5.9	37	256 qam	20
21	298750000	-5.5	37	256 qam	21
22	306750000	-5.5	37	256 qam	22
23	314750000	-5.2	37	256 qam	23
24	322750000	-5	37	256 qam	24

Also a lot of RS errors:

Channel	Locked Status	RxMER (dB)	Pre RS Errors	Post RS Errors
1	Locked	36.6	92815	29403
2	Locked	36.6	77382	23038
3	Locked	37.3	22753	47366
4	Locked	37.3	5340	48228
5	Locked	37.3	3387	44554
6	Locked	37.3	4177	43362
7	Locked	36.6	3501	40929
8	Locked	37.3	3140	40311
9	Locked	37.6	3144	40311
10	Locked	37.3	3048	40208
11	Locked	37.3	32080	41025
12	Locked	36.6	46324	43673
13	Locked	36.6	3716	37887
14	Locked	36.6	18908	145112
15	Locked	36.6	4407	15008
16	Locked	37.6	6798	91457
17	Locked	37.3	5940	92829
18	Locked	37.3	2872	33468
19	Locked	37.6	3280	33926
20	Locked	37.3	4924	103146
21	Locked	37.6	31732	128681
22	Locked	37.6	53512	113035
23	Locked	37.3	22336	148223
24	Locked	37.6	6031	86982

The actual service is still pretty fast most of the time, but unreliable with periods of no service every few days that normally needs a reboot to fix. Any advice?

[AlexisMori]

Hi...my point some time recently was a TDMA carrier wouldn't be reinforced based on the data I posted. In case you're bonding a channel that's implied for 1.1 DOCSIS modems and 3.0 modems appears like a destitute plan choice the Return range possibly has as well much clamor to back different 64QAM channels . In case both your LED's are blue DS and US, i will concede i'm blown absent.

[lotharmat]

Power levels are well out of spec!

You'd need a tech visit to remedy!

You can either wait a couple of days on here or call it in on 150 (0345 454 1111)

It'll ask you to reboot the hub (as you already have done - don't)
You will then be cut off
Wait a couple of minutes
Call 150 again - report a broadband fault - The system will recognise that you called before and transfer you to a person!

[Zoie_P]

Hi Daz28,

Thanks for your post, I have managed to find your account and can see you are affected by a congestion outage, the estimated fix date is 21 JUL 2021 12:55

Thanks,

Zoie

[jpeg1]

That doesn't look much like congestion, far more like a very local connection problem.  But you won't get a technician visit to rectify it while there is an area problem. 

As soon as the congestion is fixed you will need to phone it in as a fault. 

[jem101]

Also this thread was started six months ago so it's very likely that the OP has long since either left VM or had an engineer visit to fix it. No it wasn't a congestion issue but a connectivity (or lack thereof) problem.

[daz28]

Actually I temporarily fixed it myself by unplugging the splitter that divided the cable between my modem and one of my TiVo boxes that I don’t use often and that made the modem much more reliable, at the expense of not having Virgin TV in that room. I should book an engineer, but my house is up for sale and I hope to be moving out in three months.

[jpeg1]

So it was very likely a poor connection that you removed with your wiring changes. 

[David_Bn]

Feel free to come back to us beyond 21/07/21 and we'll be happy to book an engineer for you, if this is still required

Kindest regards,

David_Bn

[daz28]

No, I think the signal level is too low coming from the street box, but by removing the splitter, the signal reaching the modem is now sufficient. If I plug the splitter and TiVo box back in, I can see the numbers returning to their previous poor levels. I think the signal level when everything is connected is out of spec, but marginal, so it works a lot of the time, but changes in temperature / weather push it over the edge.

The cable from the street is split three ways, serving a TiVo V6 on the ground floor, a TiVo V6 on the first floor, and then finally going to the third floor, where it splits again to feed the cable modem and an original TiVo box. Thus the cable modem is the furthest away from the point of entry, has the longest cable run, and goes through two splitters.

This has worked fairly reliably for 16 years, so I suspect that I’ve been moved onto a different tap point at some stage, or the cable has deteriorated over time. The cabinet is just outside my house, so I can imagine an engineer visiting would assume I need the lowest level tap point, whereas the cable layout is such that there is more cable up the side of my house than from the cabinet to the house.