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Superhub install tomorrow
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Old 08-03-2012, 16:27   #1
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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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Old 08-03-2012, 16:49   #2
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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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Old 08-03-2012, 17:01   #3
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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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Old 08-03-2012, 18:03   #4
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Re: Superhub install tomorrow

ive been told

-5 to +5
and 40-50 Upstream
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Old 08-03-2012, 18:18   #5
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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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Old 08-03-2012, 18:36   #6
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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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Old 08-03-2012, 18:41   #7
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Re: Superhub install tomorrow

so unfair I missed this thread..

Quote:
Originally Posted by Kymmy View Post
Thank you Qasi
yeah thanks Qasi
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Old 08-03-2012, 18:52   #8
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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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Old 08-03-2012, 18:56   #9
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Re: Superhub install tomorrow

whats a 2050
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Old 08-03-2012, 18:58   #10
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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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Old 08-03-2012, 19:29   #11
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Re: Superhub install tomorrow

Quote:
Originally Posted by qasdfdsaq View Post
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.
LOL, -8 + 15 = 7 Take it off


Edinburgh is split with many types of architecture, has your upstream changed
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Old 08-03-2012, 21:48   #12
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Re: Superhub install tomorrow

Quote:
Originally Posted by jb66 View Post
LOL, -8 + 15 = 7 Take it off


Edinburgh is split with many types of architecture, has your upstream changed
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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Old 09-03-2012, 08:44   #13
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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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Old 09-03-2012, 09:32   #14
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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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Old 09-03-2012, 10:13   #15
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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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