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Low Downstream Power Hub3

Hi,

My Power(dBmV) and SNR(dB) levels look consistently too low - How do I fix this?

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

1355000000-1.438256 qam28
2203000000-0.538256 qam9
3211000000-0.738256 qam10
4219000000-0.740256 qam11
5227000000-0.938256 qam12
6235000000-138256 qam13
7243000000-138256 qam14
8251000000-138256 qam15
9259000000-138256 qam16
10267000000-138256 qam17
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Re: Low Downstream Power Hub3

Hello

Those are well within the specs for the downstream, what problems are you having ?

Regards Mike

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Re: Low Downstream Power Hub3

Thanks - WiFi blue circle of death when streaming TV, Internet drop out
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Re: Low Downstream Power Hub3

Hello

Can you please post the full downstream, upstream and logs so we can have a closer look.

Regards Mike

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Re: Low Downstream Power Hub3

Downstream bonded channels

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

1355000000-1.438256 qam28
2203000000-0.538256 qam9
3211000000-0.738256 qam10
4219000000-0.740256 qam11
5227000000-0.938256 qam12
6235000000-138256 qam13
7243000000-138256 qam14
8251000000-138256 qam15
9259000000-138256 qam16
10267000000-138256 qam17
11275000000-1.240256 qam18
12283000000-1.240256 qam19
13291000000-1.238256 qam20
14299000000-1.238256 qam21
15307000000-1.240256 qam22
16315000000-1.238256 qam23
17323000000-1.238256 qam24
18331000000-140256 qam25
19339000000-138256 qam26
20347000000-1.240256 qam27
21363000000-1.238256 qam29
22371000000-1.240256 qam30
23379000000-138256 qam31
24387000000-1.238256 qam32



Downstream bonded channels

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

1Locked38.9630
2Locked38.9610
3Locked38.9530
4Locked40.3380
5Locked38.9230
6Locked38.9390
7Locked38.6410
8Locked38.9390
9Locked38.9380
10Locked38.9370
11Locked40.9310
12Locked40.3330
13Locked38.9490
14Locked38.9580
15Locked40.3320
16Locked38.9620
17Locked38.9610
18Locked40.3370
19Locked38.9490
20Locked40.3490
21Locked38.9360
22Locked40.9430
23Locked38.9500
24Locked38.9580

 

Upstream bonded channels

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

16030002934.8512064 qam1
23940000034.8512064 qam4
34620000034.8512064 qam3
45370000034.8512064 qam2



Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1ATDMA0020
2ATDMA0030
3ATDMA0050
4ATDMA0020

 

Network Log

Time Priority Description

31/10/2020 07:22:46noticeLAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
30/10/2020 20:29:3criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
30/10/2020 11:23:11noticeLAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
30/10/2020 11:23:6Warning!LAN login FAILED : Incorrect Username / Password / ConnectionType;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
30/10/2020 00:59:34noticeDHCP Renew - lease parameters tftp file-cmreg-vmdg505-rtsxl20016u+voc-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
30/10/2020 00:59:34ErrorDHCP REBIND WARNING - Field invalid in response;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
30/10/2020 00:22:35ErrorDHCP RENEW sent - No response for IPv4;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
29/10/2020 23:45:41criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
29/10/2020 05:18:14ErrorDHCP RENEW sent - No response for IPv4;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
26/10/2020 21:09:27criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
26/10/2020 05:07:0noticeDHCP Renew - lease parameters tftp file-cmreg-vmdg505-rtsxl20016u+voc-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
26/10/2020 05:07:0ErrorDHCP REBIND WARNING - Field invalid in response;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
25/10/2020 21:14:26ErrorDHCP RENEW sent - No response for IPv4;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
25/10/2020 19:11:35criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
25/10/2020 13:21:57ErrorDHCP RENEW sent - No response for IPv4;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
25/10/2020 11:11:0criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
24/10/2020 22:36:57ErrorDHCP RENEW sent - No response for IPv4;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
21/10/2020 04:09:14criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/10/2020 03:04:51noticeSW download Successful - Via NMS
20/10/2020 03:02:47noticeSW Download INIT - Via NMS
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Message 6 of 11
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Re: Low Downstream Power Hub3

Hello

Well thanks for the rest of data, looking at these and there is no connection issues direct to the hub, is this related to just a wireless issue, if so can you install the Virginmedia Control App which will allow you to do  a scan for wireless blackspots.

Regards Mike

 

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Re: Low Downstream Power Hub3

Thanks I will check - the Hub3 is sat direct under the TV so didn't envisage blackspot.
Do the power levels look ok then?
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Message 8 of 11
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Re: Low Downstream Power Hub3

Hello

Yep all power levels / SNR etc are all well within the specifications. If yoou want to learn more there is a great post that explains it better than I could https://community.virginmedia.com/t5/Networking-and-WiFi/POWER-LEVELS-amp-SNR-A-TECHNICAL-PRIMER-upd...

Regards Mike

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Re: Low Downstream Power Hub3

Thanks for the insight this morning Mike appreciated
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Re: Low Downstream Power Hub3

Hello

Your welcome, if you have any more queries by all means come on back to the forum we do have a great team of VM staff members, VIPs and normal customers with a great deal of knowledge. Stay safe and have a great weekend.

Regards Mike

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