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tom11111
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Lots of Pre RS errors and Post RS Errors since engineer visit

I've had various engineer visits to try and locate what's causing my very slow speeds on M600 mainly at peak times. Non of the engineers have been able to find the issue. The last engineer that came out saw that their was a clear issue with my speed. He said my power levels were to high as they were all mostly capped at 51, so in one of the rooms he fitted a 'powered' adapter which needed to be plugged into the wall all the time and then he made some adjustments to power levels. What he did has done nothing to fix my speed issues (I suspect over utilisation but virgin won't confirm this). Anyway, since his visit I've noticed lots of pre and post rs errors which I've never had before. Here are my hub stats, can someone have a look over them and tell me how they look? 

Downstream bonded channels

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

11387500008.338256 qam1
2146750000840256 qam2
3154750000840256 qam3
41627500008.140256 qam4
5170750000840256 qam5
6178750000840256 qam6
71867500008.439256 qam7
81947500008.540256 qam8
92027500008.640256 qam9
102107500008.840256 qam10
11218750000940256 qam11
12226750000940256 qam12
132347500008.940256 qam13
142427500008.640256 qam14
152507500008.840256 qam15
162587500008.640256 qam16
172667500008.840256 qam17
182747500008.540256 qam18
192827500008.640256 qam19
202907500008.640256 qam20
212987500008.840256 qam21
223067500008.540256 qam22
233147500008.640256 qam23
243227500008.540256 qam24



Downstream bonded channels

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

1Locked38.9207839899
2Locked40.3209169888
3Locked40.3206672257
4Locked40.3192242230
5Locked40.3198713582
6Locked40.3208982300
7Locked39.3192192094
8Locked40.9154951945
9Locked40.9143285398
10Locked40.9119755205
11Locked40.3105963202
12Locked40.3126293627
13Locked40.9101853377
14Locked40.9111103382
15Locked40.9116333412
16Locked40.3109433352
17Locked40.3123843031
18Locked40.9133473276
19Locked40.9128853110
20Locked40.3143603279
21Locked40.3172944190
22Locked40.3143123127
23Locked40.3148983000
24Locked40.9158083479
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tom11111
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Re: Lots of Pre RS errors and Post RS Errors since engineer visit

Upstream bonded channels

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

15370000046512064 qam2
23940000045.8512064 qam4
34620000046.3512064 qam3
46030003444.3512064 qam1



Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1ATDMA0010
2ATDMA0000
3ATDMA0000
4ATDMA0000
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jbrennand
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Re: Lots of Pre RS errors and Post RS Errors since engineer visit

You havent said - what are connections/speeds like on a computer/laptop connected directly to the Hub on a Cat5e/6 ethernet cable?

Stats look OK - post the Network logs as well - the RS errors may be "historical" so can you do this and set up the BQM to see how "busy your connection is
_______________________________________________________

Switch the Hub off and unplug it for a few minutes and then start up. When done, check back in the settings and ensure that the RS error counts have all reset to 0. Then check every hour or two for the next day or two to see if they start reappearing - they shouldn't. If they do (particularly the postRS ones) you have a problem (noise) that only a Tech visit will sort.
_______________________________________________________

If you haven’t already, set up a free and secure “Broadband Quality Monitor” to continually monitor the state of your connection and record any true network dropouts , latency issues, packet drops, etc - it will thus allow you to differentiate between those and simple wifi dropouts. It does it 24/7/365 and it keeps a visual record of any/all of your network disconnections, useful data to have to match to the Network logs (in your Hub settings) and also in discussions with VM - note it will take a few hours to start seeing a sensible picture - post up the “link” to the “share live graph” (as per instructions on the TB website) when it starts to develop.

https://www.thinkbroadband.com/broadband/monitoring/quality

--------------------
John
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I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired 2 WiFi,) SH2 in modem mode with Airport Extreme Router +2 Airport Express's. On VIVID200, Talk Anytime Phone, x2 Mobile SIM only iPhones.
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tom11111
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Re: Lots of Pre RS errors and Post RS Errors since engineer visit

My speeds are around 40-150mb at peak times. I only test directly with a wired ethernet cable

I don't think the pre and post rs errors are historic because every time I reset the hub they start to build back up

The pre and post rs errors only started to appear after the engineer visit. I know this because I keep a constant check on my hub stats 

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jbrennand
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Re: Lots of Pre RS errors and Post RS Errors since engineer visit

If the PostRS errors are continually increasing it often means there is noise getting into the connection somewhere all you can really do is check that all of your coax cable connections are in nice and "finger" tight - at the Hub and wall box and also at any connectors etc. Ensure there are no “unterminated cable loose ends. Disconnect all the connections and reconnect to be sure. Also check that the internal wiring is ok with no kinking or chaffing, check that all looks good with the outside cabling and wall box. Is there anything obvious that the Tech "forgot" to terminate or connect correctly?

After that you need to call it is and see what they say when they test your connection - n.b.- the UK call centre is still picking up and calling at 08.00 (Mon-Sat) or 09.00 (Sun) gives the best chance of getting through quickly.

Or, a VM person should pick this thread up and be able to help but it can take a few days.

--------------------
John
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I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired 2 WiFi,) SH2 in modem mode with Airport Extreme Router +2 Airport Express's. On VIVID200, Talk Anytime Phone, x2 Mobile SIM only iPhones.
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David_Bn
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Re: Lots of Pre RS errors and Post RS Errors since engineer visit

Good Afternoon tom11111,

 

Thanks for your post on our Community Forums!

 

Looking into your account I can see that we've been able to offer you a new hub, and that this has been activated.

 

Can you confirm if this has made a positive impact to your services?

 

Kindest regards,

 

David_Bn

 

 

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