Superhub install tomorrow
08-03-2012, 16:27
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#1
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Inactive
Join Date: Dec 2007
Posts: 18,398
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Superhub install tomorrow
As the search will bring up 1000's of threads can anyone give me a quick tolerance range for up/down power levels and also SNR ranges for the superhub as I'm getting 50Mb installed tomorrow. Just want to be able to check the levels before the engineer leaves
Thanks in advance
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08-03-2012, 16:49
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#2
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cf.mega poster
Join Date: Aug 2004
Posts: 11,207
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Re: Superhub install tomorrow
It's the engineer's job to check the levels, but for reference the recommended range is:
-7 to +7dB downstream and the closer to zero the better
At least 35dB SNR
35-55dB upstream.
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08-03-2012, 17:01
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#3
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Inactive
Join Date: Dec 2007
Posts: 18,398
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Re: Superhub install tomorrow
Thank you Qasi
Currently on my old 2050 modem I get
Upstream 38.0 dBmV
Downstream 5.8 dBmV
SNR 41.0 dB
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08-03-2012, 18:03
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#4
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Inactive
Join Date: Feb 2012
Posts: 155
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Re: Superhub install tomorrow
ive been told
-5 to +5
and 40-50 Upstream
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08-03-2012, 18:18
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#5
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cf.mega poster
Join Date: Aug 2009
Posts: 5,386
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Re: Superhub install tomorrow
Optimum is -3 to +7
Upstream 35 to 55
Your signals are perfect, I wouldn't waste an attenuator on that
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08-03-2012, 18:36
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#6
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cf.mega poster
Join Date: Aug 2004
Posts: 11,207
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Re: Superhub install tomorrow
Pah they did some stuff in Edinburgh that dropped my downstream levels from -3 to -8. Had a 15dB FPA on and can't find my 10, so my choices now are -8 with the attenuator or +12 without it. Urgh.
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08-03-2012, 18:41
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#7
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Inactive
Join Date: Dec 2009
Location: Crawley
Posts: 14,025
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Re: Superhub install tomorrow
so unfair I missed this thread..
Quote:
Originally Posted by Kymmy
Thank you Qasi
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yeah thanks Qasi
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08-03-2012, 18:52
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#8
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Inactive
Join Date: Dec 2007
Posts: 18,398
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Re: Superhub install tomorrow
My only worry is that I want the 2050 leaving on as well for the next 45 days, will this effect the signal much having two on the same cable? For reference it'll be the only two devices as I don't bother with TV
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08-03-2012, 18:56
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#9
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Inactive
Join Date: Dec 2009
Location: Crawley
Posts: 14,025
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Re: Superhub install tomorrow
whats a 2050
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08-03-2012, 18:58
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#10
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Inactive
Join Date: Dec 2007
Posts: 18,398
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Re: Superhub install tomorrow
Modem, a bit like a 250 but with more memory and NAT capability
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08-03-2012, 19:29
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#11
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cf.mega poster
Join Date: Aug 2009
Posts: 5,386
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Re: Superhub install tomorrow
Quote:
Originally Posted by qasdfdsaq
Pah they did some stuff in Edinburgh that dropped my downstream levels from -3 to -8. Had a 15dB FPA on and can't find my 10, so my choices now are -8 with the attenuator or +12 without it. Urgh.
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LOL, -8 + 15 = 7 Take it off
Edinburgh is split with many types of architecture, has your upstream changed
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08-03-2012, 21:48
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#12
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cf.mega poster
Join Date: Aug 2004
Posts: 11,207
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Re: Superhub install tomorrow
Quote:
Originally Posted by jb66
LOL, -8 + 15 = 7 Take it off
Edinburgh is split with many types of architecture, has your upstream changed
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Yeah but the FPA is weird - I took it off and it went to +12.
Yeah, my upstream changed, but not until a few weeks after my downstream did.
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09-03-2012, 08:44
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#13
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Inactive
Join Date: Dec 2007
Posts: 18,398
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Re: Superhub install tomorrow
Engineers been, levels are (with 8 downstream channels running)
Quote:
Downstream Channels
Lock Status Modulation Channel ID Max Raw Bit Rate Frequency Power SNR Docsis/EuroDocsis locked
Locked QAM256 32 55616000 Kbits/sec 323000000 Hz 6.7 dBmV 42.4 dB Hybrid
Locked QAM256 25 55616000 Kbits/sec 267000000 Hz 7.7 dBmV 43.2 dB Hybrid
Locked QAM256 26 55616000 Kbits/sec 275000000 Hz 7.7 dBmV 43.6 dB Hybrid
Locked QAM256 27 55616000 Kbits/sec 283000000 Hz 7.3 dBmV 43.2 dB Hybrid
Locked QAM256 28 55616000 Kbits/sec 291000000 Hz 6.9 dBmV 42.9 dB Hybrid
Locked QAM256 29 55616000 Kbits/sec 299000000 Hz 8.3 dBmV 43.1 dB Hybrid
Locked QAM256 30 55616000 Kbits/sec 307000000 Hz 7.7 dBmV 43.2 dB Hybrid
Locked QAM256 31 55616000 Kbits/sec 315000000 Hz 7.4 dBmV 42.3 dB Hybrid
Upstream Channels
Lock Status Modulation Channel ID Max Raw Bit Rate Frequency Power
Locked ATDMA 2 20480 Kbits/sec 35800000 Hz 38.3 dBmV
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
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09-03-2012, 09:32
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#14
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Inactive
Join Date: Dec 2009
Location: Crawley
Posts: 14,025
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Re: Superhub install tomorrow
Those down power levels could be a little lower.
8 down channels.. very nice. would you be willing to set up a ping monitor
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09-03-2012, 10:13
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#15
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Inactive
Join Date: Dec 2007
Posts: 18,398
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Re: Superhub install tomorrow
Already set one up, also the 10Mb virgin Media business modem's still attached so I can compare the two graphs
---------- Post added at 10:13 ---------- Previous post was at 09:40 ----------
Naughty engineer never left me a "Wireless N adaptor" Have used the "contact us" pages to see if I can get one
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