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fzurro
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Message 1 of 16
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Primary downstream channel - Locked - SC-QAM

Hi,

I'm on a 1GBPS contract and since mid week I've been getting 4mb down and 40 up. Looking at the self service and going through the whole (reset the hub and wait a day) kinda thing It is still not fixed.

I usually set the HUB as Modem and then use my DECO MESH but have also tried with normal mode and it's the same.

Any advice? See attached results

1.jpg (status showing locked)router statusrouter status

3.0 Downstream channels
Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
25 331000000 9.500000 37.636276 QAM256 25
1 139000000 10.599998 37.636276 QAM256 1
2 147000000 10.699997 38.605377 QAM256 2
3 155000000 10.400002 38.605377 QAM256 3
4 163000000 9.800003 38.605377 QAM256 4
5 171000000 9.199997 37.636276 QAM256 5
6 179000000 8.500000 37.636276 QAM256 6
7 187000000 8.400002 38.605377 QAM256 7
8 195000000 8.300003 37.636276 QAM256 8
9 203000000 8.000000 38.605377 QAM256 9
10 211000000 7.500000 38.605377 QAM256 10
11 219000000 7.300003 38.605377 QAM256 11
12 227000000 7.400002 38.983261 QAM256 12
13 235000000 7.400002 37.636276 QAM256 13
14 243000000 7.400002 38.605377 QAM256 14
15 251000000 7.300003 37.636276 QAM256 15
16 259000000 8.000000 38.605377 QAM256 16
17 267000000 8.099998 37.636276 QAM256 17
18 275000000 8.099998 37.636276 QAM256 18
19 283000000 7.900002 37.355988 QAM256 19
20 291000000 8.199997 37.636276 QAM256 20
21 299000000 9.000000 37.355988 QAM256 21
22 307000000 8.800003 38.605377 QAM256 22
23 315000000 8.699997 38.605377 QAM256 23
24 323000000 8.699997 37.636276 QAM256 24
26 339000000 9.699997 37.636276 QAM256 26
27 347000000 8.900002 37.355988 QAM256 27
28 355000000 8.199997 37.636276 QAM256 28
29 363000000 8.000000 38.605377 QAM256 29
30 371000000 8.400002 37.636276 QAM256 30
31 379000000 8.199997 37.636276 QAM256 31


3.0 Downstream channels
Channel Lock Status RxMER (dB) Pre RS Errors Post RS Errors
25 Locked 37.636276 0 0
1 Locked 37.636276 0 0
2 Locked 38.605377 0 0
3 Locked 38.605377 0 0
4 Locked 38.605377 0 0
5 Locked 37.636276 0 0
6 Locked 37.636276 0 0
7 Locked 38.605377 0 0
8 Locked 37.636276 0 0
9 Locked 38.605377 0 0
10 Locked 38.605377 0 0
11 Locked 38.605377 0 0
12 Locked 38.983261 0 0
13 Locked 37.636276 0 0
14 Locked 38.605377 0 0
15 Locked 37.636276 0 0
16 Locked 38.605377 0 0
17 Locked 37.636276 0 0
18 Locked 37.636276 0 0
19 Locked 37.355988 0 0
20 Locked 37.636276 0 0
21 Locked 37.355988 0 0
22 Locked 38.605377 0 0
23 Locked 38.605377 0 0
24 Locked 37.636276 0 0
26 Locked 37.636276 0 0
27 Locked 37.355988 0 0
28 Locked 37.636276 0 0
29 Locked 38.605377 0 0
30 Locked 37.636276 0 0
31 Locked 37.636276 0 0


3.1 Downstream channels
Channel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)
159 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)
159 Locked 40 3.4 95739 0

upstreamupstreamgeneral configgeneral configdeco mesh speed testdeco mesh speed test5.jpg

 

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risc19
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Message 2 of 16
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Re: Primary downstream channel - Locked - SC-QAM

Well your downstream power levels are borderline too high, that not going to help anything.

I think you should have that adjusted by and engineer first.

Can you post the upstream as well?

My Broadband Ping - Virgin Gig1 (router mode)
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fzurro
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Message 3 of 16
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Re: Primary downstream channel - Locked - SC-QAM

Thanks for the reply.

I added them all as attachments here, but still under review. Here is the upstream.

 


3.0 Upstream channels

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

1 25800000 39.270599 5120 KSym/sec 64QAM 6
2 32600000 39.270599 5120 KSym/sec 64QAM 5
3 39400000 39.770599 5120 KSym/sec 64QAM 4
4 46200000 39.770599 5120 KSym/sec 64QAM 3

 

3.0 Upstream channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1 US_TYPE_STDMA 0 0 1 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

 

 

 

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risc19
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Message 4 of 16
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Re: Primary downstream channel - Locked - SC-QAM

Upstream is looking good!

Engineer needs to adjust downstream and he could check all the noise levels at the same time.

I'll flag if for Virgin to take a look at.

My Broadband Ping - Virgin Gig1 (router mode)
fzurro
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Message 5 of 16
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Re: Primary downstream channel - Locked - SC-QAM

Thanks a lot. I'll give them a bell

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fzurro
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Message 6 of 16
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Re: Primary downstream channel - Locked - SC-QAM

Hi,

After a night of rest the speed seems to be ok (960mb speed test) but it is still locked and but the numbers seem very similar to before. Could you check and let me know if I should be reporting this?

 

3.0 Downstream channels
Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
25 331000000 9.699997 37.636276 QAM256 25
1 139000000 10.699997 37.636276 QAM256 1
2 147000000 10.800003 38.605377 QAM256 2
3 155000000 10.599998 38.605377 QAM256 3
4 163000000 9.900002 38.605377 QAM256 4
5 171000000 9.199997 37.636276 QAM256 5
6 179000000 8.500000 37.636276 QAM256 6
7 187000000 8.599998 38.605377 QAM256 7
8 195000000 8.500000 37.636276 QAM256 8
9 203000000 8.199997 38.605377 QAM256 9
10 211000000 7.699997 38.605377 QAM256 10
11 219000000 7.400002 38.605377 QAM256 11
12 227000000 7.599998 38.605377 QAM256 12
13 235000000 7.599998 37.636276 QAM256 13
14 243000000 7.500000 38.605377 QAM256 14
15 251000000 7.500000 37.636276 QAM256 15
16 259000000 8.199997 38.605377 QAM256 16
17 267000000 8.300003 37.636276 QAM256 17
18 275000000 8.300003 37.636276 QAM256 18
19 283000000 8.199997 37.636276 QAM256 19
20 291000000 8.500000 37.636276 QAM256 20
21 299000000 9.199997 37.636276 QAM256 21
22 307000000 9.000000 37.636276 QAM256 22
23 315000000 8.800003 38.605377 QAM256 23
24 323000000 8.900002 37.636276 QAM256 24
26 339000000 10.000000 37.636276 QAM256 26
27 347000000 9.199997 37.636276 QAM256 27
28 355000000 8.500000 37.636276 QAM256 28
29 363000000 8.099998 38.605377 QAM256 29
30 371000000 8.599998 37.636276 QAM256 30
31 379000000 8.500000 37.355988 QAM256 31


3.0 Downstream channels
Channel Lock Status RxMER (dB) Pre RS Errors Post RS Errors
25 Locked 37.636276 0 0
1 Locked 37.636276 0 0
2 Locked 38.605377 0 0
3 Locked 38.605377 0 0
4 Locked 38.605377 0 0
5 Locked 37.636276 0 0
6 Locked 37.636276 0 0
7 Locked 38.605377 0 0
8 Locked 37.636276 0 0
9 Locked 38.605377 0 0
10 Locked 38.605377 0 0
11 Locked 38.605377 0 0
12 Locked 38.605377 0 0
13 Locked 37.636276 0 0
14 Locked 38.605377 0 0
15 Locked 37.636276 0 0
16 Locked 38.605377 0 0
17 Locked 37.636276 0 0
18 Locked 37.636276 0 0
19 Locked 37.636276 0 0
20 Locked 37.636276 0 0
21 Locked 37.636276 0 0
22 Locked 37.636276 0 0
23 Locked 38.605377 0 0
24 Locked 37.636276 0 0
26 Locked 37.636276 0 0
27 Locked 37.636276 0 0
28 Locked 37.636276 0 0
29 Locked 38.605377 0 0
30 Locked 37.636276 0 0
31 Locked 37.355988 0 0


3.1 Downstream channels
Channel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)
159 96 4K 1880 QAM2048 759


3.1 Downstream channels
Channel ID Lock Status RxMER Data (dB) PLC Power (dBmV) Correcteds (Active Profile) Uncorrectables (Active Profile)
159 Locked 40 3.8 3951894 0

 

Thanks a lot !

 

 

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risc19
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Message 7 of 16
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Re: Primary downstream channel - Locked - SC-QAM

Power levels will naturally fluctuate during the day. Yours are on the edge (when you took the data) that leaves zero wiggle room to allow them to do it.

One part of the day will be fine, the next not so fine.

3.1 Downstream channels
Channel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)
159 96 4K 1880 QAM2048 759

Example above.

Your main download channel has dropped in speed from qam4096 to qam2048.

Thats not good.

If you just wait here someone from virgin will be along to arrange an engineer.

You can try the 150 number but It's painful at best.

Up to you really.

My Broadband Ping - Virgin Gig1 (router mode)
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fzurro
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Message 8 of 16
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Re: Primary downstream channel - Locked - SC-QAM

Wow. Amazing help. Really appreciate it.

I called today and they tried stuff remotely but did not help. 

 

What do you mean with (If you just wait here someone from virgin will be along to arrange an engineer)?

 

Fede

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Tudor
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Message 9 of 16
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Re: Primary downstream channel - Locked - SC-QAM

VM staff member read the board and after a few days at most one other them will contact you via a private message (Purple envelope) on their post to get account details and then they will arrange a technician’s visit.


Tudor
There are 10 types of people: those who understand binary and those who don't and F people out of 10 who do not understand hexadecimal c1a2a285948293859940d9a49385a2
fzurro
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Message 10 of 16
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Re: Primary downstream channel - Locked - SC-QAM

Thabks a lot

 

Will wait then 😊.

 

Fede

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