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-   -   Superhub : Will this affect my power levels? (https://www.cableforum.uk/board/showthread.php?t=33704491)

GazCBG 17-02-2017 15:59
Will this affect my power levels?
 
Hi,

In the back bedroom, I have my SuperHub 3 and Tivo Box and is connected via a splitter from a wire that comes from the white box on the wall.

We are in the process or redecorating the bedroom, so the Tivo Box is not plugged in to the power, but is still to the VM cable.

I was wondering if I remove the splitter and connect directly to the SuperHub 3, till it is finished.

Will it affect my powerlevels on the SuperHub 3?

weesteev 17-02-2017 17:23
Re: Will this affect my power levels?
 
Power level will increase slightly, if its an issue you will have degraded or no service but unlikely that anything will happen. If the signal was that far off already it would be causing an issue with the splitter.

heero_yuy 17-02-2017 17:40
Re: Will this affect my power levels?
 
Log into the SH and check the DS levels now. The splitter removal will add around 6db. IIRC the max limit is in the region of +8dBmv so if the current levels are around zero (ideal) you should be OK.

vm_tech 17-02-2017 17:48
Re: Will this affect my power levels?
 
2 way splitter will add 3.5db

Kushan 20-02-2017 10:26
Re: Will this affect my power levels?
 
So many different answers.


Just try it and see. It'll either work or it won't.

GazCBG 20-02-2017 10:45
Re: Will this affect my power levels?
 
Hi,

Just done it.

Downsteam dB levels gone up between 3.5 to 4.3 dB
Upstream dB levels have gone down 3 dB

Before
1 291000000 1.9 38.9 256 qam 16
2 323000000 1.5 38.6 256 qam 20
3 315000000 1.5 38.9 256 qam 19
4 307000000 1.9 38.9 256 qam 18
5 299000000 2 38.6 256 qam 17
6 283000000 1.7 38.6 256 qam 15
7 275000000 1.9 38.6 256 qam 14
8 267000000 0.7 37.6 256 qam 13
9 259000000 1.2 37.6 256 qam 12
10 251000000 1.5 38.6 256 qam 11
11 243000000 1.5 37.6 256 qam 10
12 235000000 1.4 37.6 256 qam 9
13 227000000 1.4 38.6 256 qam 8
14 219000000 1.5 38.9 256 qam 7
15 211000000 1.7 38.9 256 qam 6
16 203000000 1.7 38.9 256 qam 5
17 195000000 2.2 38.9 256 qam 4
18 187000000 2 38.6 256 qam 3
19 179000000 1.2 38.6 256 qam 2
20 171000000 0.7 38.9 256 qam 1


5 39400000 ATDMA 45.3 64 qam 6400000 5120
6 32600000 ATDMA 45.3 16 qam 6400000 5120



After
1 291000000 5.8 38.6 256 qam 16
2 323000000 5.4 38.9 256 qam 20
3 315000000 5.1 38.9 256 qam 19
4 307000000 5.5 38.6 256 qam 18
5 299000000 5.9 38.6 256 qam 17
19 283000000 5.6 38.9 256 qam 15
6 275000000 5.8 38.6 256 qam 14
7 267000000 4.6 37.6 256 qam 13
8 259000000 5 37.6 256 qam 12
9 251000000 5.3 38.6 256 qam 11
10 243000000 5.1 38.6 256 qam 10
11 235000000 5 38.6 256 qam 9
12 227000000 5 38.6 256 qam 8
20 219000000 5.1 38.9 256 qam 7
13 211000000 5.5 38.6 256 qam 6
14 203000000 5.6 38.9 256 qam 5
15 195000000 6 38.9 256 qam 4
16 187000000 5.8 38.9 256 qam 3
17 179000000 5 38.9 256 qam 2
18 171000000 4.5 38.9 256 qam 1


5 39400000 ATDMA 42.3 64 qam 6400000 5120
6 32600000 ATDMA 42.3 16 qam 6400000 5120

Synthetic 20-02-2017 10:57
Re: Will this affect my power levels?
 
Should be fine, your DS levels are about what mine are at with a splitter for BB / tivo

Onramp 20-02-2017 20:33
Re: Will this affect my power levels?
 
https://www.youtube.com/watch?v=9Nxbz3zlkjY

couldn't resist, sorry!

GazCBG 27-02-2017 08:01
Re: Will this affect my power levels?
 
@Onramp lol

If I add the spliter back in place but not connect the wire to the box or to the splitter, is this could this cause interference on the VM network?

Onramp 27-02-2017 08:30
Re: Will this affect my power levels?
 
Potentially, yes.

heero_yuy 27-02-2017 09:06
Re: Will this affect my power levels?
 
Quote:
Originally Posted by GazCBG (Post 35887614)
@Onramp lol

If I add the spliter back in place but not connect the wire to the box or to the splitter, is this could this cause interference on the VM network?
It could also give "suck outs" at certain frequencies and affect your service. Unused ports should be correctly terminated.

https://www.cableforum.co.uk/images/local/2017/02/4.jpg

75 Ohm F type terminator.

Martin_D 27-02-2017 15:31
Re: Will this affect my power levels?
 
Hi I have just moved my network equipment to the back bedroom do the power levels look ok

Code:
Channel        Frequency(Hz)        Power

1        299000000        0        40.3        256 qam        13
2        323000000        0.5        40.3        256 qam        16
3        315000000        0.4        40.9        256 qam        15
4        307000000        0.2        40.9        256 qam        14
5        291000000        0.2        40.9        256 qam        12
6        283000000        0.4        40.9        256 qam        11
7        275000000        0.2        40.3        256 qam        10
8        267000000        0.7        40.9        256 qam        9
9        259000000        0.7        40.9        256 qam        8
10        251000000        1        40.9        256 qam        7
11        243000000        0.7        40.3        256 qam        6
12        235000000        1        40.9        256 qam        5
13        227000000        0.9        40.3        256 qam        4
14        219000000        0.9        40.9        256 qam        3
15        211000000        1        40.9        256 qam        2
16        203000000        0.9        40.9        256 qam        1
Code:
2        31000000        ATDMA        45        64 qam        6400000        5120
1        37600000        ATDMA        45        64 qam        6400000        5120
[img][/img]

vm_tech 27-02-2017 17:54
Re: Will this affect my power levels?
 
Quote:
Originally Posted by Martin_D (Post 35887691)
Hi I have just moved my network equipment to the back bedroom do the power levels look ok

Code:
Channel        Frequency(Hz)        Power

1        299000000        0        40.3        256 qam        13
2        323000000        0.5        40.3        256 qam        16
3        315000000        0.4        40.9        256 qam        15
4        307000000        0.2        40.9        256 qam        14
5        291000000        0.2        40.9        256 qam        12
6        283000000        0.4        40.9        256 qam        11
7        275000000        0.2        40.3        256 qam        10
8        267000000        0.7        40.9        256 qam        9
9        259000000        0.7        40.9        256 qam        8
10        251000000        1        40.9        256 qam        7
11        243000000        0.7        40.3        256 qam        6
12        235000000        1        40.9        256 qam        5
13        227000000        0.9        40.3        256 qam        4
14        219000000        0.9        40.9        256 qam        3
15        211000000        1        40.9        256 qam        2
16        203000000        0.9        40.9        256 qam        1
Code:
2        31000000        ATDMA        45        64 qam        6400000        5120
1        37600000        ATDMA        45        64 qam        6400000        5120
https://www.cableforum.co.uk/images/local/2017/02/3.png

Absolutely perfect

Kushan 28-02-2017 08:37
Re: Will this affect my power levels?
 
Quote:
Originally Posted by Martin_D (Post 35887691)
Hi I have just moved my network equipment to the back bedroom do the power levels look ok

Code:
Channel        Frequency(Hz)        Power

1        299000000        0        40.3        256 qam        13
2        323000000        0.5        40.3        256 qam        16
3        315000000        0.4        40.9        256 qam        15
4        307000000        0.2        40.9        256 qam        14
5        291000000        0.2        40.9        256 qam        12
6        283000000        0.4        40.9        256 qam        11
7        275000000        0.2        40.3        256 qam        10
8        267000000        0.7        40.9        256 qam        9
9        259000000        0.7        40.9        256 qam        8
10        251000000        1        40.9        256 qam        7
11        243000000        0.7        40.3        256 qam        6
12        235000000        1        40.9        256 qam        5
13        227000000        0.9        40.3        256 qam        4
14        219000000        0.9        40.9        256 qam        3
15        211000000        1        40.9        256 qam        2
16        203000000        0.9        40.9        256 qam        1
Code:
2        31000000        ATDMA        45        64 qam        6400000        5120
1        37600000        ATDMA        45        64 qam        6400000        5120
https://www.cableforum.co.uk/images/local/2017/02/3.png
Spot on mate, couldn't ask for better results.

GazCBG 04-03-2017 18:55
Re: Will this affect my power levels?
 
I ended up buying a 3dB forward path attenuator, which I have just added.
So my levels are now

Code:
1        299000000        1.9        38.6        256 qam        17
2        323000000        1        38.6        256 qam        20
3        315000000        1        38.9        256 qam        19
4        307000000        1.5        38.6        256 qam        18
5        291000000        1.7        38.6        256 qam        16
6        283000000        1.5        38.6        256 qam        15
7        275000000        1.2        38.9        256 qam        14
8        267000000        1.2        38.6        256 qam        13
9        259000000        0.9        37.6        256 qam        12
10        251000000        1        38.6        256 qam        11
11        243000000        1        37.6        256 qam        10
12        235000000        1        38.6        256 qam        9
13        227000000        0.9        38.6        256 qam        8
14        219000000        1        38.6        256 qam        7
15        211000000        1.4        38.6        256 qam        6
16        203000000        1.5        38.9        256 qam        5
17        195000000        1.9        38.6        256 qam        4
18        187000000        1.5        38.6        256 qam        3
19        179000000        0.9        38.6        256 qam        2
20        171000000        0.7        38.6        256 qam        1
Code:
4        46200000        ATDMA        44.3        16 qam        6400000        5120
5        39400000        ATDMA        44.3        16 qam        6400000        5120


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