Upstream QAM 16 / Power Levels

[calumwarren]

Hi. Had a repull done whilst I was not home so no tech could check after. Initially had low downstream as low as -10. New info below could anyone tell me if this is now okay or I need an internal tech visit to sort anything after this repull

Downstream bonded channels

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

1	331000000	5.6	40	256 qam	25
2	203000000	5.5	40	256 qam	9
3	211000000	5.3	40	256 qam	10
4	219000000	5.3	40	256 qam	11
5	227000000	4.9	40	256 qam	12
6	235000000	4.5	40	256 qam	13
7	243000000	4.4	40	256 qam	14
8	251000000	4.5	40	256 qam	15
9	259000000	4.6	40	256 qam	16
10	267000000	4.9	40	256 qam	17
11	275000000	4.9	40	256 qam	18
12	283000000	5.4	40	256 qam	19
13	291000000	5.5	40	256 qam	20
14	299000000	5.9	40	256 qam	21
15	307000000	5.6	40	256 qam	22
16	315000000	5.8	40	256 qam	23
17	323000000	5.5	40	256 qam	24
18	339000000	5.8	40	256 qam	26
19	347000000	5.9	40	256 qam	27
20	355000000	6	40	256 qam	28
21	363000000	6.1	40	256 qam	29
22	371000000	5.9	40	256 qam	30
23	379000000	5.4	40	256 qam	31
24	387000000	4.8	40	256 qam	32

Downstream bonded channels

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

1	Locked	40.3	3258	5392
2	Locked	40.3	42	2294
3	Locked	40.3	39	2057
4	Locked	40.9	45	5290
5	Locked	40.3	52	4489
6	Locked	40.9	79	4198
7	Locked	40.3	61	4742
8	Locked	40.9	60	5161
9	Locked	40.3	54	3086
10	Locked	40.3	58	12162
11	Locked	40.9	75	12026
12	Locked	40.3	127	9948
13	Locked	40.9	38	285
14	Locked	40.3	2960	11081
15	Locked	40.9	3031	6720
16	Locked	40.9	3206	6169
17	Locked	40.3	3225	19781
18	Locked	40.3	3241	7158
19	Locked	40.3	2303	19425
20	Locked	40.9	2422	23951
21	Locked	40.9	2163	24351
22	Locked	40.9	2062	20628
23	Locked	40.9	1861	20565
24	Locked	40.9	2614	20407

Upstream bonded channels

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

1	39400064	40.5	5120	16 qam	6
2	46199980	40.8	5120	64 qam	5
3	32599169	40	5120	16 qam	7
4	25800108	39.8	5120	32 qam	8

Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

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

 

[Tudor · Accepted solution]

You need a technician’s visit, probably needs work at the street cabinet. 

Check with Area faults on 0800 561 0061 If you have a VM landline 150 this goes down to post code level. You could also try the web page http://www.virginmedia.com/servicechecker although this only covers large outages.

VM will not dispatch any technicians when an area fault exists.

If no faults found:

Call Customer Services on 0345 454 1111/150 if you have a VM landline or wait two or three days for a VM staff member to get to your post.

____________________________________________

[calumwarren]

Thanks bud. I’ll leave it here till a staff member picks it up. Thanks. 

[Akua_A]

Hi @calumwarren,

Welcome back to our community forums and sorry to hear you are having issues with your broadband service. We can understand this is not ideal and we want to best help.

I have been able to locate your service on our system and I can see you recently contacted our team regarding this issue. I can also see an upcoming appointment to resolve this matter. Please do let me know how the appointment goes and if you need any further help after.

Thanks,

[calumwarren]

Sure bud will do. Thank you. 

[calumwarren]

Hi. Engineer came but didn’t do anything. Said everything’s fine. Mentioning the upstream QAM levels he said it’s normal to use 16 sometimes and it can just vary. Was this correct or just a fob?

[Steven_L]

Thanks for coming back to us @calumwarren, how has your connection been running since the technician visit?

Regards,

Steven_L

[calumwarren]

Hi Steven

Engineer said upload QAM is okay at 16? Upload been shooting to 52mb then slowly falls down to 2mb ish by the end of the test. 

im not home but I’ll submit the stats soon as I return. 

Thanks for checking in. Much appreciated. 

[calumwarren]

3.0 Downstream channels

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

25	331000000	4.199997	40.366287	QAM256	25
1	139000000	7.500000	40.946209	QAM256	1
2	147000000	7.000000	40.366287	QAM256	2
3	155000000	7.000000	40.946209	QAM256	3
4	163000000	6.800003	40.946209	QAM256	4
5	171000000	6.400002	40.366287	QAM256	5
6	179000000	6.300003	40.366287	QAM256	6
7	187000000	6.199997	40.946209	QAM256	7
8	195000000	6.099998	40.366287	QAM256	8
9	203000000	5.900002	40.946209	QAM256	9
10	211000000	5.800003	40.946209	QAM256	10
11	219000000	5.599998	40.366287	QAM256	11
12	227000000	5.300003	40.366287	QAM256	12
13	235000000	5.000000	40.366287	QAM256	13
14	243000000	4.900002	40.946209	QAM256	14
15	251000000	5.000000	40.946209	QAM256	15
16	259000000	5.199997	40.366287	QAM256	16
17	267000000	4.800003	40.366287	QAM256	17
18	275000000	5.000000	40.946209	QAM256	18
19	283000000	5.099998	40.946209	QAM256	19
20	291000000	5.199997	40.946209	QAM256	20
21	299000000	5.500000	40.946209	QAM256	21
22	307000000	5.099998	40.366287	QAM256	22
23	315000000	4.800003	40.366287	QAM256	23
24	323000000	4.199997	40.366287	QAM256	24
26	339000000	4.500000	40.946209	QAM256	26
27	347000000	4.599998	40.946209	QAM256	27
28	355000000	4.699997	40.366287	QAM256	28
29	363000000	4.800003	40.366287	QAM256	29
30	371000000	4.699997	40.946209	QAM256	30
31	379000000	4.099998	40.366287	QAM256	31

3.0 Downstream channels

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

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

[calumwarren]

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

1.8

270665760

84