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Straight6Petrol
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Router stats

Hi all, 

Thanks in advance for any assistance!

Ive been checking the stats on my SuperHub 4 and the signal strength and SNR seem to fluctuate up and down each day. I assume this is normal?

The SNR values are also identical right down to every decimal place on many of the channels. Surely this can't be accurate? 

I also keep getting network log errors for T3 time outs and something about the power level exceeding the maximum value allowed:

RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW

My signal levels and SNR are "within spec" between +4 and +6 on all channels and SNR averages 37. Minimal post RS errors apart from fresh after a reboot.

Just looking for guidance on the accuracy of the above stats and if this is all normal.

Cheers all.

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Straight6Petrol
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Re: Router stats

Downstream:

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

1 138750000 5.500000 36.386890 QAM256 1

2 146750000 5.400002 36.386890 QAM256 2

3 154750000 6.400002 36.386890 QAM256 3

4 162750000 6.400002 37.636276 QAM256 4

5 170750000 6.400002 37.355988 QAM256 5

6 178750000 6.400002 37.636276 QAM256 6

7 186750000 6.699997 37.355988 QAM256 7

8 194750000 6.699997 37.636276 QAM256 8

9 202750000 6.599998 37.636276 QAM256 9

10 210750000 6.500000 37.636276 QAM256 10

11 218750000 6.500000 37.636276 QAM256 11

12 226750000 6.400002 37.636276 QAM256 12

13 234750000 6.099998 37.636276 QAM256 13

14 242750000 5.900002 37.636276 QAM256 14

15 250750000 5.900002 37.355988 QAM256 15

16 258750000 5.500000 37.636276 QAM256 16

17 266750000 5.599998 37.636276 QAM256 17

18 274750000 5.599998 37.636276 QAM256 18

19 282750000 5.699997 38.605377 QAM256 19

20 290750000 5.599998 38.605377 QAM256 20

21 298750000 5.500000 38.605377 QAM256 21

22 306750000 5.400002 38.605377 QAM256 22

23 314750000 5.400002 38.983261 QAM256 23

24 322750000 5.300003 38.605377 QAM256 24

25 330750000 4.699997 37.636276 QAM256 25

26 370750000 4.099998 37.355988 QAM256 26

27 378750000 4.300003 37.636276 QAM256 27

28 386750000 4.099998 38.605377 QAM256 28

29 394750000 4.199997 38.605377 QAM256 29

30 402750000 4.500000 38.605377 QAM256 30

31 410750000 4.300003 38.605377 QAM256 31

32 418750000 4.099998 38.605377 QAM256 32

 

 

3.0 Downstream channels

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

1 Locked 36.386890 0 0

2 Locked 36.386890 0 0

3 Locked 36.386890 0 0

4 Locked 37.636276 0 0

5 Locked 37.355988 0 0

6 Locked 37.636276 0 0

7 Locked 37.355988 0 0

8 Locked 37.636276 0 0

9 Locked 37.636276 0 0

10 Locked 37.636276 0 0

11 Locked 37.636276 0 0

12 Locked 37.636276 0 0

13 Locked 37.636276 0 0

14 Locked 37.636276 0 0

15 Locked 37.355988 0 0

16 Locked 37.636276 0 0

17 Locked 37.636276 0 0

18 Locked 37.636276 0 0

19 Locked 38.605377 0 0

20 Locked 38.605377 0 0

21 Locked 38.605377 0 0

22 Locked 38.605377 0 0

23 Locked 38.983261 0 0

24 Locked 38.605377 0 0

25 Locked 37.636276 0 0

26 Locked 37.355988 0 0

27 Locked 37.636276 0 0

28 Locked 38.605377 0 0

29 Locked 38.605377 0 0

30 Locked 38.605377 0 0

31 Locked 38.605377 0 0

32 Locked 38.605377 0 0

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Straight6Petrol
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Re: Router stats

Upstream:

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

1 53700000 39.500000 5120 KSym/sec 64QAM 6

2 39400000 39.000000 5120 KSym/sec 64QAM 8

3 60300000 39.750000 5120 KSym/sec 64QAM 5

4 46200000 39.000000 5120 KSym/sec 64QAM 7

 

 

3.0 Upstream channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1 US_TYPE_STDMA 0 0 0 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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Richw1982
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Helpful Answer

Re: Router stats

That's not uncommon with both Upstream and DS SNR.  Your forward levels should be between -6/+10 and SNR above 34.  Return levels should be between 33-51 with SNR above 28 (ideally 32) but cant see US SNR from hub Data.  

T3's are when Ranging Request Retries are Exhausted and can be caused by network issues or a faulty splitter or isolator.  Check all connections are clean and tight and reboot the hub to clear counters.  See what they are after 24 hours.  Low numbers wont cause an issue so if there's no problems with service, i wouldn't worry 

I work for Virgin Media - but all opinions posted here are my own
Straight6Petrol
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Re: Router stats

Couldn't thank you enough for your help and that reassurance is all I was after.

So far my experience of VM has been overall poor (from CS) but the engineering resource VM have is amazing. 

Its the staff like you which really do make a massive difference. 

Have an amazing weekend and thanks so much again.

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Richw1982
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Re: Router stats

That's ok, I'm pleased  I could help.  Thanks, have a great weekend as well

I work for Virgin Media - but all opinions posted here are my own