Virgin Media Community

[RangerXx]

Hi

Please can you diagnose a problem I’m experiencing for the last two weeks with jitter and packet loss? I’ve reset the hub and turn off / on but this only briefly Helps.

I’m in area 31.

Many thanks

Yesterday’s chart

today’s chart

Down stream

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

1	139000000	-9	36	256 qam	1
2	147000000	-9	36	256 qam	2
3	155000000	-9.2	37	256 qam	3
4	163000000	-9.4	36	256 qam	4
5	171000000	-9.7	36	256 qam	5
6	179000000	-9.7	36	256 qam	6
7	187000000	-9.9	36	256 qam	7
8	195000000	-9.9	36	256 qam	8
9	203000000	-10.5	36	256 qam	9
10	211000000	-10.7	36	256 qam	10
11	219000000	-10.9	36	256 qam	11
12	227000000	-11	36	256 qam	12
13	235000000	-11.5	35	256 qam	13
14	243000000	-11.7	35	256 qam	14
15	251000000	-11.9	35	256 qam	15
16	259000000	-11.7	35	256 qam	16
17	267000000	-11.7	35	256 qam	17
18	275000000	-11.4	36	256 qam	18
19	283000000	-11.2	36	256 qam	19
20	291000000	-10.9	36	256 qam	20
21	299000000	-10.5	36	256 qam	21
22	307000000	-10.5	36	256 qam	22
23	315000000	-9.9	37	256 qam	23
24	323000000	-9.2	37	256 qam	24

Downstream bonded channels

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

1	Locked	36.3	38	0
2	Locked	36.6	57	0
3	Locked	37.3	45	0
4	Locked	36.6	34	0
5	Locked	36.3	51	0
6	Locked	36.6	47	0
7	Locked	36.6	73	0
8	Locked	36.6	40	0
9	Locked	36.3	83	15
10	Locked	36.6	74	0
11	Locked	36.6	97	0
12	Locked	36.3	194	0
13	Locked	35.7	362	0
14	Locked	35.5	530	0
15	Locked	35.7	446	0
16	Locked	35.7	574	0
17	Locked	35.5	377	0
18	Locked	36.3	202	0
19	Locked	36.3	183	0
20	Locked	36.6	94	0
21	Locked	36.3	133	0
22	Locked	36.6	52	0
23	Locked	37.3	62	0
24	Locked	37.6	42	0

 upstream

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

1	32600000	4.475	5120	64 qam	11
2	46200010	4.6	5120	64 qam	7
3	39399921	4.525	5120	64 qam	8
4	25800059	4.4	5120	64 qam	12

Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1	ATDMA	0	0	0	0
2	ATDMA	0	0	0	0
3	ATDMA	0	0	0	0
4	ATDMA	0	0	0	0

[JitteryPinger]

On first look at the downstream power levels, you may need a technician out to make some adjustments at the cabinet as those look a little on the high side and SNR is low.

Upstream looks well.

[RangerXx]

Thanks Matt,

I hope that a VM member can arrange an engineer to visit to make the adjustments. 

Re your Hub4, is it an upgrade in terms of latency and jitter?

J

[Adduxi]

The DS power levels are too low, should be between -6 and +10 btw .....

[JitteryPinger]

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@Adduxi wrote:
The DS power levels are too low, should be between -6 and +10 btw .....

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Oops yes thats correct.

[JitteryPinger]

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@RangerXx wrote:

Re your Hub4, is it an upgrade in terms of latency and jitter?

J

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It doesn't seem to see suffer spikes like Hub 3 did but on a whole, not really.

[RangerXx]

Just giving this a bump as it’s still a problem.

[Corey_C]

Hi RangerXx,

Thanks for your post and reaching out to the community forums. I'll send you a PM shortly to have a look at your connection.

Cheers,

Corey C