Virgin Media Community

[alexanderb81]

Hi All

Trying to familiarise myself with my Volt Gig1 connection that has been applied to my account this week, with a Hub 4. I have tried to follow a few suggestions on these forums, and came across a very useful post about understanding Hub Status info. It looks to be pinned, and I am not sure if I can post the link without breaking any rules.

Further down in the comments, it was mentioned that acceptable downstream power levels "should be within the range of -6 to +10" Are my levels below acceptable, or should I try request an engineer visit, as a number of channels are out of the +10 range, or is this still considered acceptable?

3.0 Downstream channels

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

25	331000000	9.400002	40.946209	QAM256	25
1	139000000	12.099998	40.946209	QAM256	1
2	147000000	11.699997	40.946209	QAM256	2
3	155000000	11.699997	40.366287	QAM256	3
4	163000000	11.500000	40.366287	QAM256	4
5	171000000	11.199997	40.366287	QAM256	5
6	179000000	11.199997	40.946209	QAM256	6
7	187000000	11.199997	40.366287	QAM256	7
8	195000000	11.300003	40.946209	QAM256	8
9	203000000	11.199997	40.366287	QAM256	9
10	211000000	11.199997	40.946209	QAM256	10
11	219000000	11.199997	40.946209	QAM256	11
12	227000000	11.199997	40.946209	QAM256	12
13	235000000	11.300003	40.366287	QAM256	13
14	243000000	11.400002	40.946209	QAM256	14
15	251000000	11.199997	40.946209	QAM256	15
16	259000000	11.400002	40.946209	QAM256	16
17	267000000	11.400002	40.366287	QAM256	17
18	275000000	11.099998	40.366287	QAM256	18
19	283000000	10.900002	40.366287	QAM256	19
20	291000000	10.699997	40.366287	QAM256	20
21	299000000	11.000000	40.366287	QAM256	21
22	307000000	10.900002	40.366287	QAM256	22
23	315000000	10.599998	40.366287	QAM256	23
24	323000000	10.199997	40.946209	QAM256	24
26	339000000	9.400002	40.366287	QAM256	26
27	347000000	9.300003	40.366287	QAM256	27
28	355000000	9.199997	40.366287	QAM256	28
29	363000000	9.000000	40.366287	QAM256	29
30	371000000	9.000000	40.366287	QAM256	30
31	379000000	9.000000	40.946209	QAM256	31

Thanks

[alexanderb81]

3.0 Downstream channels

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

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

3.1 Downstream channels

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

33

96

4K

1880

QAM4096

759

3.1 Downstream channels

Channel ID Lock Status RxMER Data (dB) PLC Power (dBmV) Correcteds (Active Profile) Uncorrectables (Active Profile)

33

Locked

43

6.0

29046306

0

[Adduxi]

Your power levels are indeed too high.  The range you quoted is correct and they need reduced closer to the mid point. 

How are the Upstream power levels?  They should be between 34 and 51.

If you wait here a day or two a VM Mod will pick this up and hopefully arrange a technician to sort it out.

[alexanderb81]

Thanks Adduxi

I believe upstream levels are OK, but posting them for refernece:

3.0 Upstream channels

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

1	53700000	39.270599	5120 KSym/sec	64QAM	7
2	46200000	39.020599	5120 KSym/sec	64QAM	8
3	39400000	38.770599	5120 KSym/sec	64QAM	9
4	60300000	39.270599	5120 KSym/sec	64QAM	6

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

[-tony-]

upstream is fine - downstream as said is a bit too high - when you swapper the hub was there an attenuator on the old hub - if so have you put it on the new one - would have been the coax and the connector on the hub

if not the big question is do you have problems if not then you can argue it does not need fixing - if you do or if you do want the levels to be in spec then you need a tech - you can ring but that can have mixed results or wait here for VM they will book something

[alexanderb81]

Hi Tony

there was no attenuator on the old hub. It was a Hub 3 with a brand new (m500) install in August 2020. I'm experiencing some performance loss, and tried various methods such as direct to hub in modem mode, in router mode checking samknows, different cable etc. The only thing I cant try at this point is a different cabled device as I don't have any available. So until I can find another device to bring into the network to test, I can't say for certain if its my device that's responsible, or if the Hub, and line are worth looking at?

My samknows was 1128 to the hub, but 399 to the device, but ookla speedtests have shown up to 535. Uploads are fine at around 52Mbps so I don't think there are issues there. If an admin thinks there could be some help in getting an engineer out and bring the levels in line, that will be great and one thing checked off.

[Zach_R]

Hi @alexanderb81,

Thank you for your posts and welcome back to our community forums. We're here to help.

I am so sorry to hear that you appear to be having some problems with your connection following a package and router upgrade. I'm going to send you a private message in a moment so that we can take some details and have a closer look at what's going on. As has been discussed here, we may need to arrange a technician visit and we can do that there too.

Please respond to this at your earliest convenience and we can go from there.

Thanks,
 

[Zach_R]

Hi @alexanderb81,

Thank you for reaching back out to me via private message so we could have a closer look at what's going on.

As discussed there, a technician visit has now been scheduled and booked. I'm unable to confirm the date or time of the booking publicly, but you can check and manage/reschedule it if needed via your My Virgin Media online account.

Let us know how the visit goes.

Thanks,
 

[alexanderb81]

Thank you very much for your assistance Zach

[Kain_W]

Thanks for the responses alexanderb81,

Welcome back to the community!

If you do face further issues after the appointment then let us know and we'll run further checks.

Take care for now,