Cable Forum - Superhub 24 Channels Down

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- - Superhub : 24 Channels Down - 1 Up (https://www.cableforum.uk/board/showthread.php?t=33706305)

24 Channels Down - 1 Up

Hi,

I recently upgraded to the Tivo 6, which also meant swapping my SH for a V3 model.

Since the switchover, I find general browsing a bit 'off' (hard to explain, slight delay after clicking links, that sort of thing) and gaming definitely off with latency seemingly OK, but with momentary lag now and then.

Looking at the SH3 status, I see that I have 24 channels downstream and only one up. I'm sure I had at least 2 up before (could even have been more).

Here's my status readings. I've edited the headers to make them a little neater.

Does the below look OK?

Code:

Downstream bonded channels

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

1        139000000        -4.2        36.3        256 qam        1

2        323000000        -1.7        38.9        256 qam        24

3        315000000        -1.7        38.9        256 qam        23

4        307000000        -1.7        38.9        256 qam        22

5        299000000        -2        37.6        256 qam        21

6        291000000        -2.7        38.6        256 qam        20

7        283000000        -2.7        38.6        256 qam        19

8        275000000        -2.7        38.6        256 qam        18

9        267000000        -2.7        38.6        256 qam        17

10        259000000        -3.2        37.6        256 qam        16

11        251000000        -3        37.6        256 qam        15

12        243000000        -3.2        37.6        256 qam        14

13        235000000        -3.5        37.6        256 qam        13

14        227000000        -3.5        37.6        256 qam        12

15        219000000        -3.5        37.6        256 qam        11

16        211000000        -3.7        37.3        256 qam        10

17        203000000        -3.7        37.6        256 qam        9

18        195000000        -3.7        37.3        256 qam        8

19        187000000        -3.5        37.3        256 qam        7

20        179000000        -3.5        37.3        256 qam        6

21        171000000        -3.4        37.3        256 qam        5

22        163000000        -3.5        37.6        256 qam        4

23        155000000        -3.5        37.3        256 qam        3

24        147000000        -4        36.3        256 qam        2

Code:

Upstream bonded channels

Ch ID  Frequency(Hz)        Mode  dBmV        Modulation Bandwidth(Hz)        Symbol Rate (ksps)

2        39400000        ATDMA        49.5        16 qam            6400000        5120

*EDIT* I don't know if it's worth mentioning, but the downstream power does seem to fluctuate. It can change by up to 2.0 per channel, though it's usually around 0.5 on each channel.

Thanks for looking.

Re: 24 Channels Down - 1 Up

This needs VM's attention. There should definitely be more than one upstream.

As to the "momentary lag now and then", that's an issue with the Hub 3's CPU behaviour, which causes an interrupt every half minute or so. Lots of people are concerned about this with gaming and VM (and other cable vendors in the USA using the same chip) have no real answer for this.

Re: 24 Channels Down - 1 Up

Quote:

Originally Posted by Sephiroth (Post 35944708)

This needs VM's attention

ya, ring 150 dude. It will be an absolute stress and ball ache to a) actually speak to someone b) and then try to explain what is wrong but after 20 minutes or so you will get there. Sympathies in advance.

When the tech comes out he is probably going to move your tap point in the cabinet. Ask him what he is going to do or what he does done because when everything is up and running again if your upstream power is around 50 again ask him if he can do something to bring it down to the 45 mark.

Re: 24 Channels Down - 1 Up

Thanks both, will be ringing them today.

TO illustrate the fluctuating power levels, here's what they look like this morning:

Code:

Downstream

1        139000000        -7.2        33.9        256 qam        1

2        323000000        -2        38.6        256 qam        24

3        315000000        -1.7        38.6        256 qam        23

4        307000000        -2        38.9        256 qam        22

5        299000000        -2.2        37.6        256 qam        21

6        291000000        -2.9        38.6        256 qam        20

7        283000000        -3        38.6        256 qam        19

8        275000000        -3.2        37.3        256 qam        18

9        267000000        -3.2        37.6        256 qam        17

10        259000000        -3.7        37.3        256 qam        16

11        251000000        -4        37.6        256 qam        15

12        243000000        -4        37.6        256 qam        14

13        235000000        -4.2        37.3        256 qam        13

14        227000000        -4.4        37.3        256 qam        12

15        219000000        -4.5        36.6        256 qam        11

16        211000000        -5        36.6        256 qam        10

17        203000000        -5.4        36.3        256 qam        9

18        195000000        -5.5        35.7        256 qam        8

19        187000000        -5.7        35.5        256 qam        7

20        179000000        -5.9        35.7        256 qam        6

21        171000000        -5.7        35.5        256 qam        5

22        163000000        -5.9        35.5        256 qam        4

23        155000000        -6        34.9        256 qam        3

24        147000000        -6.5        34.3        256 qam        2

Code:

Upstream

2        39400000        ATDMA        57        16 qam        6400000        5120

Re: 24 Channels Down - 1 Up

yeah you defo need your tap point moving. The downstream power needs to be as close to 0 and although those readings are technically within spec they can definitely be improved upon. Your upstream is a different story though and is out of spec and needs fixing. I am sure it will get fixed pronto once you can get someone out. Have you rang them yet?

Re: 24 Channels Down - 1 Up

The engineer came around today and has fixed the problem.

It turns out that there is a splitter inside the white box that was quite old and was failing. He replaced it and all seems good again.

Code:

Downstream

1        323000000        2        38.9        256 qam        24

2        315000000        2.2        38.6        256 qam        23

3        307000000        2        38.6        256 qam        22

4        299000000        1.7        38.6        256 qam        21

5        291000000        1.2        38.9        256 qam        20

6        283000000        0.7        38.9        256 qam        19

7        275000000        0.9        38.6        256 qam        18

8        267000000        1.5        38.6        256 qam        17

9        259000000        1        38.9        256 qam        16

10        251000000        0.7        38.6        256 qam        15

11        243000000        0.7        38.6        256 qam        14

12        235000000        0.7        38.9        256 qam        13

13        227000000        0.4        38.6        256 qam        12

14        219000000        0.5        38.6        256 qam        11

15        211000000        0.5        38.6        256 qam        10

16        203000000        0.4        38.6        256 qam        9

17        195000000        0.5        38.6        256 qam        8

18        187000000        0.9        37.6        256 qam        7

19        179000000        0.7        37.6        256 qam        6

20        171000000        0.9        37.6        256 qam        5

21        163000000        0.9        38.6        256 qam        4

22        155000000        0.5        37.6        256 qam        3

23        147000000        0        37.3        256 qam        2

24        139000000        -0.4        37.3        256 qam        1

Code:

Upstream

2        39400000        ATDMA        45.8        16 qam        6400000        5120

1        46200000        ATDMA        45.8        16 qam        6400000        5120

Thanks for the advice guys.

Re: 24 Channels Down - 1 Up