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24 Channels Down - 1 Up
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Old 24-04-2018, 00:48   #1
buckleb
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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.

Last edited by buckleb; 24-04-2018 at 01:11.
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Old 24-04-2018, 09:39   #2
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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.
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Old 24-04-2018, 09:52   #3
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Re: 24 Channels Down - 1 Up

Quote:
Originally Posted by Sephiroth View Post
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.
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Old 24-04-2018, 12:33   #4
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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

Last edited by buckleb; 24-04-2018 at 12:37.
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Old 25-04-2018, 01:18   #5
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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?
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Old 25-04-2018, 10:48   #6
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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.
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Old 25-04-2018, 10:53   #7
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Re: 24 Channels Down - 1 Up

Perfect
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