QAM64-100Meg - getting speeds less than 40mg

[imaxtec]

Dear Friends,

:confused::confused:

Area :Reading
Postcode :RG1
Yesterday i have upgraded my virgin media 50meg to 100meg
when i was with 50meg since few years i never ever had a problem regarding speed
i always got 50meg or 50+

Since yesterday they changed my old modem into new superhub and activated the 100meg i am getting between 35-40meg download speed all the time.

i was on the phone with the help desk more than 8 times and no one seems to give a proper answer or advice.

i heard 100meg have to be QAM 256 but mine shows still QAM 64 Langley.

Any one please advice me what to do next i am help less right now. i will really appreciate it.

Many Thanks
Kind Regards
Sen

Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 435000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File OK
Security Enabled BPI+

Downstream Channels
Lock Status Modulation Channel ID Max Raw Bit Rate Frequency Power SNR Docsis/EuroDocsis locked
Locked QAM64 236 41712000 Kbits/sec 435000000 Hz -10.9 dBmV 36.4 dB Hybrid
Locked QAM64 237 41712000 Kbits/sec 443000000 Hz -11.3 dBmV 36.1 dB Hybrid
Locked QAM64 238 41712000 Kbits/sec 451000000 Hz -11.7 dBmV 35.6 dB Hybrid
Locked QAM64 239 41712000 Kbits/sec 459000000 Hz -12.8 dBmV 34.5 dB Hybrid
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Upstream Channels
Lock Status Modulation Channel ID Max Raw Bit Rate Frequency Power
Locked ATDMA 2 20480 Kbits/sec 35800000 Hz 51.0 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

Primary Downstream Service Flow
Downstream(0)
SFID 4264
Max Traffic Rate 110000000 bps
Max Traffic Burst 10000 bytes
Mix Traffic Rate 0 bps
Primary Upstream Service Flow
Upstream(0)
SFID 4263
Max Traffic Rate 10250000 bps
Max Traffic Burst 16320 bytes
Mix Traffic Rate 0 bps
Max Concatenated Burst 16320 bytes
Scheduling Type Best Effort

[Jayster]

Your power levels are quite low.

[Sephiroth]

They give you this spiel that the engineer is necessary to attend so that power levels and SNR should be set right.

I don't know what your power levels were before but -12 dBmv is dodgy at 100 meg; dogy at any speed, IMO.

Your upstream may not be 51 dBmv; please check by refreeshing the screen if it's moving up towards 55 dBmv. This would mean there is a common cause fault - attenuation between the modem and street cabinet (including the modem itself).

QAM64 means that the circuit is somewhat noisy, possibly in the fibre optic section (tired lasers). Frankly, they shouldn't have allowed 100 meg to go into areas that have not had their infrastructure upgraded. I suppose they couldn't resist the extra income for a few months.

So you need to get on the phone during office hours, wait till you get a UK agent and politely but firmly ask to get this sorted. They'll jump onto your SH and confirm that the power settings are way off. If you're lucky, they'll look at the CMTS stats to see if there's upstream noise. Then they can decide what to do.

The install tech should have put a 12v power supply on and not to have kept the old modem power supply. That could be a problem; they might suspect the SH and send a new one. If they send a service tech, don't let hin go until your downstream is between -3 and +7 and your upstream is always below 54 dBmv.

Hope that helps.

[imaxtec]

Thanks Sephiroth:tu:

What ever u said is well explained and 100% true in my case
here is the story:
when i was on 50meg connection with old VMNG300 i had some trouble regarding power level and SNR engineer turned up and fixed 10db forward path attenuator along with two of the FAT -3db attenuator form that day to 24.01.2012 i had excellent 50meg connection all time 5MB/sec download speed

Since 24.01.2012 the engineer came to my home and took the old modem and fixed the super hub. he didn't even bring the PDA for the on site activation he just sent a text message of my new superhub mac address and old mac address to his office to activate it. it was bit odd and dody

The interesting part is he didn't even remove any of those 10db forward path attenuator and other two attenuator. not only that but also i noticed when he opened the super hub box he didnt bring the power cable, he just connected the old modem's power supply which is 12V and 1 A

he didn't even check the power level, he opened the www.speedtest.net and done a test it showed i am getting 55mb for that he said i have to wait around 1 hour for the 100meg to get activated and up and running since he left i am getting rubbish speed all the time download speed all the time between 20meg to 40 meg right now i put my super hub in modem mode and connect the DLink DIR 615 even though same story and same slow speed

later i just removed two FAT-3db attenuator and left the 10db forward path attenuator on the connection results here

Note: i can feel weird smell from the superhub:confused:

Connection

Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 435000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File OK
Security Enabled BPI+
Downstream Channels
Lock Status Modulation Channel ID Max Raw Bit Rate Frequency Power SNR Docsis/EuroDocsis locked
Locked QAM64 236 41712000 Kbits/sec 435000000 Hz -4.8 dBmV 39.9 dB Hybrid
Locked QAM64 237 41712000 Kbits/sec 443000000 Hz -5.1 dBmV 39.5 dB Hybrid
Locked QAM64 238 41712000 Kbits/sec 451000000 Hz -5.3 dBmV 39.5 dB Hybrid
Locked QAM64 239 41712000 Kbits/sec 459000000 Hz -6.5 dBmV 38.2 dB Hybrid
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Upstream Channels
Lock Status Modulation Channel ID Max Raw Bit Rate Frequency Power
Locked ATDMA 2 20480 Kbits/sec 35800000 Hz 44.5 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
Primary Downstream Service Flow
Downstream(0)
SFID 4264
Max Traffic Rate 110000000 bps
Max Traffic Burst 10000 bytes
Mix Traffic Rate 0 bps
Primary Upstream Service Flow
Upstream(0)
SFID 4263
Max Traffic Rate 10250000 bps
Max Traffic Burst 16320 bytes
Mix Traffic Rate 0 bps
Max Concatenated Burst 16320 bytes
Scheduling Type Best Effort
Current System Time:Thu Jan 26 01:07:22 2012

still i am getting around 25 to 35 speed now
i feel shame on me because i ruined my broadband by upgrading into 100meg i was a happy lad when i was with 50meg with old modem.

please advice me pals

evey time i call VM its connected to overseas most of the
time they dont even know what i am taking about and the ground situation
the reality is different, finger crossed i might get connect with UK agent during the office time tomorrow

Many Thanks
Sen

[Sephiroth]

IMO you don't want the 10 dB FPA on. Better to be at +6 than -6. Once you've got the power levels right, then a proper investigation to any speed issues can begin.

[imaxtec]

Any Good? i have removed that 10db atti
still i am getting around 35-45 whole day time in early morning between 1am - 4 am i am getting unstable 80meg to 99 meg

please advice

kind regards
sen
Connection

Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 435000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File OK
Security Enabled BPI+
Downstream Channels
Lock Status Modulation Channel ID Max Raw Bit Rate Frequency Power SNR Docsis/EuroDocsis locked
Locked QAM64 236 41712000 Kbits/sec 435000000 Hz 4.9 dBmV 39.9 dB Hybrid
Locked QAM64 237 41712000 Kbits/sec 443000000 Hz 4.1 dBmV 39.0 dB Hybrid
Locked QAM64 238 41712000 Kbits/sec 451000000 Hz 3.5 dBmV 38.5 dB Hybrid
Locked QAM64 239 41712000 Kbits/sec 459000000 Hz 2.5 dBmV 37.6 dB Hybrid
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Upstream Channels
Lock Status Modulation Channel ID Max Raw Bit Rate Frequency Power
Locked ATDMA 2 20480 Kbits/sec 35800000 Hz 44.5 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
Primary Downstream Service Flow
Downstream(0)
SFID 4264
Max Traffic Rate 110000000 bps
Max Traffic Burst 10000 bytes
Mix Traffic Rate 0 bps
Primary Upstream Service Flow
Upstream(0)
SFID 4263
Max Traffic Rate 10250000 bps
Max Traffic Burst 16320 bytes
Mix Traffic Rate 0 bps
Max Concatenated Burst 16320 bytes
Scheduling Type Best Effort
Current System Time:Thu Jan 26 14:18:49 2012

[Sephiroth]

Those levels are in spec although I raise an eyebrow at the difference between downstream levels. It means they've got work to do on your street cabinet.

For what my opinion is worth, the formal improvement works to bring your area up to 100 meg spec should sort out the noise (bringing you up to 256QAM), properly slope the amplifier so that the power levels are pretty even leaving only the possibility of congestion as a cause.

I do note peak time congestion, however and the works should add downstream channels to ease that.

[The Installer]

Please don't forget you are looking at a QAM64 downstream here not a QAM256 one. Personally i would put the 10dB forward path attenuator back on as these power levels would be much better.

When those downstreams go over to QAM256, you'll have around another 7dB added to them, so with the 10dB FPA left on, you'd then expect levels of about +1 or so, which would be pretty much smack on ;)

[Sephiroth]

But putting the 10 dB FPA would not be a good idea. Your current power levels are absolutely perfect. When I went from 64QAM to 256QAM my downstream levels never changed.

So my advice is to keep the FPA off until needed.

[Chrysalis]

in my view +4 is about optimal.

unlike the superhub the vmng300 shows timeouts.

The only range that got me 0 timeouts was between +2 and +7db.

My experience shows no affect on speeds, however if you have dodgy levels when contacting tech support they probably wont treat you serious unless the power level is in spec.

[jb66]

in my view +4 is about optimal.

unlike the superhub the vmng300 shows timeouts.

The only range that got me 0 timeouts was between +2 and +7db.

My experience shows no affect on speeds, however if you have dodgy levels when contacting tech support they probably wont treat you serious unless the power level is in spec.

I agree, I always make my customer 3 to 4 db to allow for fluctuations, being a little high is better than low, leave all attenuators off

[The Installer]

But putting the 10 dB FPA would not be a good idea. Your current power levels are absolutely perfect. When I went from 64QAM to 256QAM my downstream levels never changed.

So my advice is to keep the FPA off until needed.

http://www.cableforum.co.uk/board/12/26006-cable-modem-signal-levels.html
As posted here but please note this is QAM64 not QAM256.

When the network switched over up here many years ago to QAM256, networks told us that there would be a 7dB increase in RF signal strength, this happened but maybe the network is different for you? Here is Telewest and all fed to Knowsley head end.

Quote: Jb66

Originally Posted by Chrysalis
in my view +4 is about optimal.

unlike the superhub the vmng300 shows timeouts.

The only range that got me 0 timeouts was between +2 and +7db.

My experience shows no affect on speeds, however if you have dodgy levels when contacting tech support they probably wont treat you serious unless the power level is in spec.

I agree, I always make my customer 3 to 4 db to allow for fluctuations, being a little high is better than low, leave all attenuators off

And what downstreams are you looking at day in day out normally? QAM256

[jb66]

http://www.cableforum.co.uk/board/12/26006-cable-modem-signal-levels.html
As posted here but please note this is QAM64 not QAM256.

When the network switched over up here many years ago to QAM256, networks told us that there would be a 7dB increase in RF signal strength, this happened but maybe the network is different for you? Here is Telewest and all fed to Knowsley head end.



And what downstreams are you looking at day in day out normally? QAM256

Qam256, I have been putting on larger attenuators recently but I thought that was due to the new amps as the upstream power levels have dropped which is nice rather than the qam256 upgrade. The op can keep the old attenuator for future use if they go up.

The op

---------- Post added at 21:45 ---------- Previous post was at 21:33 ----------

Frequency 299000000 307000000 315000000 323000000
Lock Status
(QAM Lock/FEC Sync/MPEG Lock) Y/Y/Y Y/Y/Y Y/Y/Y Y/Y/Y
Channel Id 117 118 119 120
Modulation 256QAM 256QAM 256QAM 256QAM
Symbol Rate
(Msym/sec) 6.952 6.952 6.952 6.952
Interleave Depth I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17
Power Level
(dBmV) 9.24 8.62 8.26 7.81
RxMER
(dB) 34.35 34.93 35.42 35.97
Correctable
Codewords 406166 53678 8868 2767
Uncorrectable
Codewords 968 919 891 1019


Just looking at my signals and there booming, this is after a 4 way splitter!!! I remember when it was the old amps I was considering fitting an hdu

[Sephiroth]

http://www.cableforum.co.uk/board/12/26006-cable-modem-signal-levels.html
As posted here but please note this is QAM64 not QAM256.
[SEPH]: That thread has nothing to do with what you said. You said downstream power would rise when modulation changed from 64QAM to 256QAM. In the thread you referenced, which is now out of date, it was about min/max power levels. Not what would happen when moving to 256QAM.
When the network switched over up here many years ago to QAM256, networks told us that there would be a 7dB increase in RF signal strength, this happened but maybe the network is different for you? Here is Telewest and all fed to Knowsley head end.
[SEPH]: That happens when they do things to the local amplifiers. The downstream power received is purely a function of amplifier configuration at the street cabinet.

So you're not making sense, I'm afraid.

[qasdfdsaq]

I'm still impressed by the level of noise on the network in the Edinburgh area and how poor the SNR is - I've never seen any better than borderline!

[imaxtec]

Hi friends,

thanks for the comments and ideas
i phoned the virgin media tec team they said that they don't have any plan to upgrade QAM 64 into QAM 256 and also i have to stick to QAM 64 with 100mb connection

Every time i refresh the connection page on 192.168.100.1 i can see the power level is keep changing
up and down (eg: -1.9 dBmV changes into -2.0,-1.8,-2.2)

i am confused now still i am not getting 100meg speed always i am getting 35 to 45 meg speed. may be some thing wrong inside the Superhub

RE: my cable modem power level i think i am with QAM64 so acceptable and optimal power level

QAM64 Langley & Bromley Networks

Too Low Accept Optimal Accept Too High
-20 to -14 -13 to -11 -10 to 0 +1 to +3 +4 to +20

so i have removed my 10db attenuator and replaced with 6db attenuator
after that i am getting like this

Results with 6DB attenuator
Connection

Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 435000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File OK
Security Enabled BPI+
Downstream Channels
Lock Status Modulation Channel ID Max Raw Bit Rate Frequency Power SNR Docsis/EuroDocsis locked
Locked QAM64 236 41712000 Kbits/sec 435000000 Hz -0.8 dBmV 39.9 dB Hybrid
Locked QAM64 237 41712000 Kbits/sec 443000000 Hz -1.7 dBmV 38.9 dB Hybrid
Locked QAM64 238 41712000 Kbits/sec 451000000 Hz -2.2 dBmV 38.3 dB Hybrid
Locked QAM64 239 41712000 Kbits/sec 459000000 Hz -3.4 dBmV 37.4 dB Hybrid
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Upstream Channels
Lock Status Modulation Channel ID Max Raw Bit Rate Frequency Power
Locked ATDMA 2 20480 Kbits/sec 35800000 Hz 49.5 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
Primary Downstream Service Flow
Downstream(0)
SFID 4264
Max Traffic Rate 110000000 bps
Max Traffic Burst 10000 bytes
Mix Traffic Rate 0 bps
Primary Upstream Service Flow
Upstream(0)
SFID 4263
Max Traffic Rate 10250000 bps
Max Traffic Burst 16320 bytes
Mix Traffic Rate 0 bps
Max Concatenated Burst 16320 bytes
Scheduling Type Best Effort
Current System Time:Fri Jan 27 01:54:02 2012

is that good level with 6db attenuator or do i want to still remove the attenuator and use with our any attenuator.

Note: my main cable is attached with my cable tv and broadband via splitter


WITH-OUT 10DB attenuator i am getting like this

Acquire Downstream Channel 435000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File OK
Security Enabled BPI+
Downstream Channels
Lock Status Modulation Channel ID Max Raw Bit Rate Frequency Power SNR Docsis/EuroDocsis locked
Locked QAM64 236 41712000 Kbits/sec 435000000 Hz 4.9 dBmV 39.9 dB Hybrid
Locked QAM64 237 41712000 Kbits/sec 443000000 Hz 4.1 dBmV 39.0 dB Hybrid
Locked QAM64 238 41712000 Kbits/sec 451000000 Hz 3.5 dBmV 38.5 dB Hybrid
Locked QAM64 239 41712000 Kbits/sec 459000000 Hz 2.5 dBmV 37.6 dB Hybrid
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Upstream Channels
Lock Status Modulation Channel ID Max Raw Bit Rate Frequency Power
Locked ATDMA 2 20480 Kbits/sec 35800000 Hz 44.5 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
Primary Downstream Service Flow
Downstream(0)
SFID 4264
Max Traffic Rate 110000000 bps
Max Traffic Burst 10000 bytes
Mix Traffic Rate 0 bps
Primary Upstream Service Flow
Upstream(0)
SFID 4263
Max Traffic Rate 10250000 bps
Max Traffic Burst 16320 bytes
Mix Traffic Rate 0 bps
Max Concatenated Burst 16320 bytes
Scheduling Type Best Effort

please comment about this issue. Really Appreciated

Kind Regards
Sen

[Sephiroth]

You shouldn't be using the fat attenuator at all. It's pushing up the upstream power and you don't need/want that.

It's clear to me what's wrong. The power levels guidance here is somewhat outdated though not useless.

A problem (apart from anything else there may be) I've noticed is that the power levels fall as the downstream frequency rises. The fall is sharper than I'd have expected and it means that the amplifier in your street cabinet is incorrectly sloped (that's the compensation necessary to account for higher attenuation with higher frequency).

VM have a duty, IMO, to keep their cabinets properly configured to avoid problems, particularly for people very near or furthest away from the cabinet.

Also about this 256QAM thing. They keep some channels at 64QAM where there is noise on the line. Like old infrastructure with poor lasers. AFAIK, VM are upgrading all that for the 100 meg rollout (which has been prematurely rolled out in some areas like mine and yours). Your SNR levels are excellent and they could switch to the higher capacity 256QAM overnight. If they don't then they shouldn't load the area up to the level that can be loaded for 256QAM. That has to be your biggest concern, IMO.

[imaxtec]

Thanks Seph and other friends for your time and advice really appreciated.
please guide me how do i request VM to look in to my street cabinets
is there any special line for VM to call for network team to make a complaint regarding my
QAM upgrade and inspect my street cabinet.

This Morning

Connection
Note: now i am not using any of the attenuation at all
Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 435000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File OK
Security Enabled BPI+
Downstream Channels
Lock Status Modulation Channel ID Max Raw Bit Rate Frequency Power SNR Docsis/EuroDocsis locked
Locked QAM64 236 41712000 Kbits/sec 435000000 Hz 6.1 dBmV 40.6 dB Hybrid
Locked QAM64 237 41712000 Kbits/sec 443000000 Hz 6.0 dBmV 39.5 dB Hybrid
Locked QAM64 238 41712000 Kbits/sec 451000000 Hz 5.7 dBmV 39.0 dB Hybrid
Locked QAM64 239 41712000 Kbits/sec 459000000 Hz 4.7 dBmV 38.9 dB Hybrid
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Upstream Channels
Lock Status Modulation Channel ID Max Raw Bit Rate Frequency Power
Locked ATDMA 2 20480 Kbits/sec 35800000 Hz 44.0 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
Primary Downstream Service Flow
Downstream(0)
SFID 4264
Max Traffic Rate 110000000 bps
Max Traffic Burst 10000 bytes
Mix Traffic Rate 0 bps
Primary Upstream Service Flow
Upstream(0)
SFID 4263
Max Traffic Rate 10250000 bps
Max Traffic Burst 16320 bytes
Mix Traffic Rate 0 bps
Max Concatenated Burst 16320 bytes
Scheduling Type Best Effort
Current System Time:Fri Jan 27 14:47:47 2012


C:\Users>ping www.bbc.co.uk

Pinging www.bbc.net.uk [212.58.244.71] with 32 bytes of data:
Reply from 212.58.244.71: bytes=32 time=30ms TTL=51
Reply from 212.58.244.71: bytes=32 time=43ms TTL=51
Reply from 212.58.244.71: bytes=32 time=11ms TTL=51
Reply from 212.58.244.71: bytes=32 time=16ms TTL=51

Ping statistics for 212.58.244.71:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 11ms, Maximum = 43ms, Average = 25ms

C:\Users>tracert www.bbc.co.uk

Tracing route to www.bbc.net.uk [212.58.244.71]
over a maximum of 30 hops:

1 34 ms 9 ms 8 ms
2 8 ms 7 ms 9 ms winn-core-1a-ge-019-951.network.virginmedia.net
[62.253.121.69]
3 10 ms 33 ms 17 ms winn-bb-1a-so-130-0.network.virginmedia.net [62.
253.184.113]
4 24 ms 15 ms 8 ms winn-bb-1b-ae0-0.network.virginmedia.net [213.10
5.172.162]
5 36 ms 9 ms 11 ms brnt-bb-1a-ae3-0.network.virginmedia.net [62.253
.185.197]
6 16 ms 12 ms 33 ms glfd-bb-1b-as1-0.network.virginmedia.net [212.43
.163.105]
7 13 ms 53 ms 14 ms glfd-tmr-1-ae5-0.network.virginmedia.net [213.10
5.159.46]
8 12 ms 31 ms 34 ms tcl5-ic-1-as0-0.network.virginmedia.net [62.253.
185.78]
9 16 ms 14 ms 15 ms 212.58.239.249
10 * * * Request timed out.
11 29 ms 27 ms 34 ms ae1.er01.rbsov.bbc.co.uk [132.185.254.46]
12 15 ms 21 ms 35 ms 132.185.254.142
13 18 ms 13 ms 19 ms 212.58.239.62
14 28 ms 14 ms 21 ms 212.58.251.44
15 14 ms 47 ms 26 ms bbc-vip116.telhc.bbc.co.uk [212.58.244.71]

Trace complete.

[The Installer]

Originally Posted by The Installer
http://www.cableforum.co.uk/board/12/12/12...al-levels.html
As posted here but please note this is QAM64 not QAM256.

That thread has nothing to do with what you said. You said downstream power would rise when modulation changed from 64QAM to 256QAM.

Yes i did, and yes it should as far as i'm aware.

In the thread you referenced, which is now out of date, it was about min/max power levels. Not what would happen when moving to 256QAM.

Right & wrong.
Look at that thread again and you can see what the signal levels should be for BOTH modulation types for each head end, so it’s still very much valid today!

As posted by Peter in that thread:

Here is a Sticky for 50Mb power levels across all platforms

Downstream
* Knowsley networks using QAM64 are: -7 to +3 dBmV.
* Knowsley networks using QAM256 are: -3 to +7 dBmV.

* Langley & Bromley networks using QAM64 are: -10 to 0 dBmV.
* Langley & Bromley networks using QAM256 are: -4 to +6 dBmV.


Upstream
* Upstream signal levels (from the modem) should be between 34 and
55dBmV.

[QUOTE]When the network switched over up here many years ago to QAM256, networks told us that there would be a 7dB increase in RF signal strength, this happened but maybe the network is different for you? Here is Telewest and all fed to Knowsley head end.

That happens when they do things to the local amplifiers. The downstream power received is purely a function of amplifier configuration at the street cabinet.


Sorry but you are wrong, the signal level adjustments were done at the head end (Wolverhampton) and across the whole franchise, not street by street at an amp or node.

All your RF power levels are set at the head end, yes granted if you have an issue with an amp or something in the street that can affect power levels locally, however the overall level for each carrier is as i say, set at the head end.

[Sephiroth]

You are out of date. Peter's latest advice which VM use as recommended downstream bands are:

256QAM everywhere -3 to +7 dBmv
64QAM Langley SHE -10 to +10 dBmv
64QAM Knowsley SHE -7 to +3 dBmv

There is no Bromley SHE.

Now, I understand what you're saying about the power put out at the Head End. It implies that the acceptable level at the modem is partially dependent on what the QAMs put out which is dependent on the state of the optics in the downstream distribution.

But there is the DOCSIS 3 spec which says that a cable modem must support -17 to +13 dBmv for 64QAM amd must support -13 to +17 dBmv at 256QAM.

This makes it totally academic as to what actually happens when the OP's modulation changes to 256QAM. And what actually happens is regulated at the street cabinet amplifier which will/should be set to the standardised value across the country.

Whether or not the OP's power level will rise - I can't tell without knowing what the last person in his street cabinet chain is getting by way of power.

But is not a given that 256QAM will mean a rise in modem power level.

[imaxtec]

Hi Seph and friends

Area Reading
Client Host Name: cpc9-rdng20-2-0-custXXX.15-3.cable.virginmedia.com

the virgin tech team send me a new superhub regarding my slow speed issue.
but nothing has changed after changing the new superhub.

and also they have done some test remotely,no luck still i am getting around 50meg conection.

and also i came to know in my house area around 100 virgin modem live and connected during the peak time.

seph can u please confirm weather reading or my area is fully active for 100meg (stable 100meg speed)

Regards
Sen

[philwhite100]

I am on QAM256 on 50meg. is this good or bad??

[Sephiroth]

When I was on 50 meg 64QAM I was on RDNG-20 [cpc12-rdng20-2-0-custxxx.15-3.cable.virginmedia.com] and getting 50 meg with 3 downstream channels. I was on what I term as a legacy line card.

Suddenly they moved me to RDNG-21 and 256QAM, still getting 50 meg; I had 4 downstream channels. This is due to the higher capacity line cards being installed across the Cisco UBR estate. Since the optics in my locality hadn't changed, I couldn't see why I'd ever been on 64QAM. I concluded that this was a setting chosen by VM (on how many domains?) for a wide area; RDNG-20 is known to serve Bracknell also

They've obviously upgraded the line cards on RDNG-20 but in your case not the modulation. This tells me that there's still work to be done on the optics in localities served by the line card ports that are on 64QAM.

This doesn't really take you further forward, I'm sorry to say. I believe that the Reading area was allowed to quetly go 100 meg somewhat prematurely. It's not even on the standard DOCSIS 3 downstream frequency plan.

I'm staying on 50 meg until VM shove 100 meg my way. I'll prolly be happy if I only get 50 meg, although I have to bear in mind that if my BT Infinity speed is doubled with no extra cost I might be moaning at VM if I don't get at least that.

The sum of the above is that RDNG-20 (or rather your port) isn't serving its 100 meg users well and, of course, you know that already.

[The Installer]

You are out of date. Peter's latest advice which VM use as recommended downstream bands are:

256QAM everywhere -3 to +7 dBmv
64QAM Langley SHE -10 to +10 dBmv
64QAM Knowsley SHE -7 to +3 dBmv

There is no Bromley SHE.

Now, I understand what you're saying about the power put out at the Head End. It implies that the acceptable level at the modem is partially dependent on what the QAMs put out which is dependent on the state of the optics in the downstream distribution.

But there is the DOCSIS 3 spec which says that a cable modem must support -17 to +13 dBmv for 64QAM amd must support -13 to +17 dBmv at 256QAM.

This makes it totally academic as to what actually happens when the OP's modulation changes to 256QAM. And what actually happens is regulated at the street cabinet amplifier which will/should be set to the standardised value across the country.

Whether or not the OP's power level will rise - I can't tell without knowing what the last person in his street cabinet chain is getting by way of power.

But is not a given that 256QAM will mean a rise in modem power level.

My point was that there is or was an RF signal level increase when going from QAM64 to QAM256, something that is also mentioned here.

www.scte.alaska.com/Training/256-QAM%20preparation.pdf (Page 19).

Granted maybe things have moved on a little with DOCSIS3 etc, however being as the OP still has a QAM64 setup, it would make more sense to keep the signal levels lower as i suggested and as they were before.

Anyway, no point in dragging this out as life is too short and if its working then just leave it alone ;)

[Sephiroth]

You haven't even read properly nor understood the Cisco document you referenced.

Making due allowance for the fact that it is a DOCSIS 1 document (because the discussion here is about 64QAM vs 256QAM power levels and the OP's attenuator), page 32 (and page 8) defines the cable modem input level as being in the range -15 to +15 dBmv.

The RF output power at the CMTS is targeted at reaching the first active node, which is the Headend laser transmitter. What happens after that is a matter of keeping noise and leakage down to a minimum, and that's all about condition of the plant.

What pops out of your nearest optical node reaches your street cabinet and is amplified to meet the -15 to +15 dBmv cable modem range (taking your DOCSIS 1 example). The ranges are slightly diefferent for DOCSIS 3 but that requires no increase of power at the cable modem due to 256QAM.

So my advice to the OP stands.

[The Installer]

You haven't even read properly nor understood the Cisco document you referenced.

Making due allowance for the fact that it is a DOCSIS 1 document (because the discussion here is about 64QAM vs 256QAM power levels and the OP's attenuator), page 32 (and page 8) defines the cable modem input level as being in the range -15 to +15 dBmv.

The RF output power at the CMTS is targeted at reaching the first active node, which is the Headend laser transmitter. What happens after that is a matter of keeping noise and leakage down to a minimum, and that's all about condition of the plant.

What pops out of your nearest optical node reaches your street cabinet and is amplified to meet the -15 to +15 dBmv cable modem range (taking your DOCSIS 1 example). The ranges are slightly diefferent for DOCSIS 3 but that requires no increase of power at the cable modem due to 256QAM.

So my advice to the OP stands.

Fair enough as i said things have moved along with DOCSIS 3, however as you rightly mention and have done in a previous thread, the cable modem needs to accept an input from -15 to +15dB or there abouts.

Once again i know things have moved on, but analogue TV as referenced in that doc and as it was here on the TW network did have about a 10dB higher carrier in comparison to the digital QAM64 carriers. Now these more powerful analogue TV carriers (which i accept have been closed down now in most areas) would still be going into the cable modem.

So if you had your QAM64 carriers at +3dB for example going into a modem, that would mean that your old analogue TV carriers would be sitting at about 10dB higher than that, give or take a little to allow for local conditions etc and also going into the modem and hence getting close to the upper end of what the modem itself can/should handle without starting to cause a few problems. Just because the modem does not look at these frequencies or lock onto them, they are still there present in the modem and need to be taken into consideration when setting your levels with a QAM64 carrier on your modem, this I’m quite sure you understand anyway.

Now i'll say it again, yes i have not looked at the latest DOCSIS 3 specs and yes the analogue carriers may or may not have been shut down in the OP's area?? however this was my reasoning for pointing out that the level maybe a little high for a QAM64 carrier that the OP's modem has/is locked on to.

If you think that is so wrong then i'll quite happily so ok, just my understanding of it and what i was taught being out the field and know to be right. I have also seen many times in the past when we were still on QAM64 around here, some modems having problems with a +6dB downstream signal and an attenuator would fix this by bringing everything back into spec again. That same +6dB downstream however was not such an issue with a QAM256 carrier though, as i mentioned as it was higher than the QAM 64 carriers (by 7dB around here).

[Sephiroth]

If you were confining your advice to cases where there is analogue TV, then I wouldn't argue. But you didn't say so and that isn't the case any more.

I presume now that you accept my advice to the OP stands as correct.

[imaxtec]

Thanks again for seph and The installer

i have a question.

last whole year i was on 50meg connection using QAM64 connected via vmng300
i never ever had a problem regarding my download speed. 365 days 24/7 most of the time i was getting 50meg bang on.

when i changed into 100meg with new super hub? why don't i even get close to 50meg the speed all time different (10,17,22,35,55meg-Max)
only between 2am-4am i am getting 80meg - 90meg

my questions are :
1.when i moved to 100meg did they changed my sever from 50meg to different one?
2.why my connection was 100% stable when i was 50meg and not with 100meg?
3.right now my power level and SNR all are perfect even though why i am not getting good stable connection?

VM tech team booked a senior engineer to visit my property on Monday what shall i ask him regarding this matter.

please send your comments. i will really appreacited

Many Thanks

Regards
Sen

[qasdfdsaq]

my questions are :
1.when i moved to 100meg did they changed my sever from 50meg to different one?
No.


2.why my connection was 100% stable when i was 50meg and not with 100meg?
Because the Superhub sucks
3.right now my power level and SNR all are perfect even though why i am not getting good stable connection?
Because the Superhub sucks

[Sephiroth]

Thanks again for seph and The installer
SEPH: Please don't thank me & The Installer in the same breath; LOL!

i have a question.

last whole year i was on 50meg connection using QAM64 connected via vmng300
i never ever had a problem regarding my download speed. 365 days 24/7 most of the time i was getting 50meg bang on.

when i changed into 100meg with new super hub? why don't i even get close to 50meg the speed all time different (10,17,22,35,55meg-Max)
only between 2am-4am i am getting 80meg - 90meg

my questions are :

1.when i moved to 100meg did they changed my sever from 50meg to different one?
SEPH: Not if your Host Client didn't change.

2.why my connection was 100% stable when i was 50meg and not with 100meg?
SEPH: We never established (dif we?) whether or not your SH is in modem mode. If it is then were you to go back to 50 meg, it would perform fine unless it was duff. I presume that if you are in modem mode, your router is capable of 100meg WAN-LAN throughput.


3.right now my power level and SNR all are perfect even though why i am not getting good stable connection?
SEPH: Same answer as abobve plus: I think they rolled out 100 meg prematurely. It shouldn't really go out to a 64QAM area. The infrastructure somewhere isn't in good nick - or they forgot about RDNG-20.


VM tech team booked a senior engineer to visit my property on Monday what shall i ask him regarding this matter.

please send your comments. i will really appreacited

Many Thanks

Regards
Sen

[imaxtec]

Hi seph
i will 100% agree with all of ur post reply,i think installer mistakenly looked into DOSISCS-01

i don't trust superhub its complete crap,i am using superhub via modem mode linked with WNDR4500 netgear Wireless Router.

with Direct cable to pc via modem :speeds form 30-60meg
with Wifi speeds between: 20-50meg

my issue is there any thing to do with node and CMTS/uBR update or upgrade?

Regards
Sen

[Sephiroth]

Perhaps a PATHPING www.bbc.co.uk (in the command window) will reveal where there might be delay. Pathping takes a few minutes to run.

[imaxtec]

C:\Users>PATHPING www.bbc.co.uk

Tracing route to www.bbc.net.uk [212.58.244.66]
over a maximum of 30 hops:
0 Sen-PC.cable.virginmedia.net [192.168.0.102]
1 xxxxxxxx
2 winn-core-1b-ge-301-2816.network.virginmedia.net [62.253.121.225]
3 winn-bb-1b-so-130-0.network.virginmedia.net [213.105.175.33]
4 brnt-bb-1a-ae3-0.network.virginmedia.net [62.253.185.197]
5 glfd-bb-1b-as1-0.network.virginmedia.net [212.43.163.105]
6 glfd-tmr-1-ae5-0.network.virginmedia.net [213.105.159.46]
7 tcl5-ic-1-as0-0.network.virginmedia.net [62.253.185.78]
8 212.58.239.249
9 * * *
Computing statistics for 200 seconds...
Source to Here This Node/Link
Hop RTT Lost/Sent = Pct Lost/Sent = Pct Address
0 Sen-PC.cable.virginmedia.net
[192.168.0.102]
0/ 100 = 0% |
1 --- 100/ 100 =100% 100/ 100 =100% xxxxxxxxx
0/ 100 = 0% |
2 35ms 0/ 100 = 0% 0/ 100 = 0% winn-core-1b-ge-301-2816.network.virginmedia.net [62.253.121.225]
0/ 100 = 0% |
3 38ms 0/ 100 = 0% 0/ 100 = 0% winn-bb-1b-so-130-0.network.virginmedia.net [213.105.175.33]
0/ 100 = 0% |
4 38ms 0/ 100 = 0% 0/ 100 = 0% brnt-bb-1a-ae3-0.network.virginmedia.net [62.253.185.197]
0/ 100 = 0% |
5 35ms 0/ 100 = 0% 0/ 100 = 0% glfd-bb-1b-as1-0.network.virginmedia.net [212.43.163.105]
0/ 100 = 0% |
6 40ms 0/ 100 = 0% 0/ 100 = 0% glfd-tmr-1-ae5-0.network.virginmedia.net [213.105.159.46]
0/ 100 = 0% |
7 39ms 0/ 100 = 0% 0/ 100 = 0% tcl5-ic-1-as0-0.network.virginmedia.net [62.253.185.78]
100/ 100 =100% |
8 --- 100/ 100 =100% 0/ 100 = 0% 212.58.239.249

Trace complete.

[Sephiroth]

I did the same Pathing as you. I didn't get the 100% rejection of pass-through pings that you got at hop #7.

But overall, where you were recording 35+ ms, I was recording 25+ms. It's almost the ratio of 64QAM to 256QAM symbol rate.

I realise that this is a one off comparison at around the same time of day. But my gut feel is that the difference between us should simply not be there. That would need deeper comparison though and it's bedtime!

[qasdfdsaq]

I would say 35ms to the second hop already indicates local congestion or a duff CPE. That should really be in the 6-10ms range.

[imaxtec]

Hi Seph and friends,

VM engineer visited my property and checked all cable lines,super hub and my power level
everything was spot on he done some speed test via speed test.net and http://speedtest1.virginmedia.com the result came up with 55meg (via cable mode)

he went down to my street cabinet and found there was one TAP connected with 16 Connectors and 16 connector linked with many splitter.

He said that he came to know that VM network team is 100% completed their new cabinet upgrade all over the bracknel area and painted with grey colour(part of new upgrade), and their next Target is Reading area. He confirmed there are many unused cables still connected with my cabinet. lots of work to be done and remove all unwanted connection and keep the power level neat and tidy.

Later he called the VM 2nd LINE to look deep into my issue

VM second line team used my PC remotely and done some speed test but still same speed, (55meg) during that time my area utilisation was 18%.

Well it was more than 40min he was with my PC finally he put some Parallel downloads from http://gamefiles.virginmedia.com around 6 downloads in same time each file size 1.5GB all of them downloaded in different speeds.

during that time he opened the Network status activity of my network card and saw my connection RECIVED rate 95-110meg speed.

he said that i am getting 100meg to my property and explained about bandwidth i really don't have a clue what he was on about

I asked a question to him ok fine, u proved me that i am getting in-total 100meg via putting many parallel downloads and adding all speeds together.
but when i was with 50meg single download all the time during last year is 5.5MB/Sec
(rapidshare,torrent,apple sever)

why i am not getting 10MB/sec or even 8MB/sec for a single download, now i am only getting Max 3MB/sec

for my question he don't have an answer.he said i don't have an answer mate, but i only can confirm that ur property reaching 100meg connection.

my opinion : this is complete rubbish answer from the 2nd line

if i am downloading 1.5GB movie how i am gonna get full speed? i am only gonna get MAX 3-4MB/sec
Its like i am on 30meg connection

i don't know whats going on i am totally fed up and hopeless.

please advice me regarding this issue.

Many Thanks

Sen

[Andrewcrawford23]

Hi Seph and friends,

VM engineer visited my property and checked all cable lines,super hub and my power level
everything was spot on he done some speed test via speed test.net and http://speedtest1.virginmedia.com the result came up with 55meg (via cable mode)

he went down to my street cabinet and found there was one TAP connected with 16 Connectors and 16 connector linked with many splitter.

He said that he came to know that VM network team is 100% completed their new cabinet upgrade all over the bracknel area and painted with grey colour(part of new upgrade), and their next Target is Reading area. He confirmed there are many unused cables still connected with my cabinet. lots of work to be done and remove all unwanted connection and keep the power level neat and tidy.

Later he called the VM 2nd LINE to look deep into my issue

VM second line team used my PC remotely and done some speed test but still same speed, (55meg) during that time my area utilisation was 18%.

Well it was more than 40min he was with my PC finally he put some Parallel downloads from http://gamefiles.virginmedia.com around 6 downloads in same time each file size 1.5GB all of them downloaded in different speeds.

during that time he opened the Network status activity of my network card and saw my connection RECIVED rate 95-110meg speed.

he said that i am getting 100meg to my property and explained about bandwidth i really don't have a clue what he was on about

I asked a question to him ok fine, u proved me that i am getting in-total 100meg via putting many parallel downloads and adding all speeds together.
but when i was with 50meg single download all the time during last year is 5.5MB/Sec
(rapidshare,torrent,apple sever)

why i am not getting 10MB/sec or even 8MB/sec for a single download, now i am only getting Max 3MB/sec

for my question he don't have an answer.he said i don't have an answer mate, but i only can confirm that ur property reaching 100meg connection.

my opinion : this is complete rubbish answer from the 2nd line

if i am downloading 1.5GB movie how i am gonna get full speed? i am only gonna get MAX 3-4MB/sec
Its like i am on 30meg connection

i don't know whats going on i am totally fed up and hopeless.

please advice me regarding this issue.

Many Thanks

Sen

your like 99% of virign user you dnt understand the internet,

firstly the site yoru downloading for needs the bandwidht to provide you so you can download at full speed, and torrents cant always provide you with full bandiwdht depends what the seeds are providing

there is very few sites that will provide you witha full 12mb/s download speed with one single download your pretty lucky to get 5.5mb/s that bit uncommon even from microsoft

to get the full speed you need mutli connection liek hwo torrents work i suggest using a download manager

[imaxtec]

Thanks Andrewcrawford23 for your comment,

i know all about internet bandwith.i said torrent for an example

i use rapidshare sever (swiss) they got 600 Gbit/s of bandwidth. whole last year when i was in 50meg connection i download rapidshare single file via internet download manager

download speed 24/7 soild 5MB/sec to 6MB/sec for single file download
when i put two download that 6MB/sec speed will split into two speed
each of them will download 2.7MB/sec

in my 100meg case its completely diffrent. each file wont go up than 3MB/sec which is capable of going beyond 10MB/sec

That is my worries. VM media engineer said some thing about their cabinet bandwith not internet bandwith.


sen

[Andrewcrawford23]

Thanks Andrewcrawford23 for your comment,

i know all about internet bandwith.i said torrent for an example

i use rapidshare sever (swiss) they got 600 Gbit/s of bandwidth. whole last year when i was in 50meg connection i download rapidshare single file via internet download manager

download speed 24/7 soild 5MB/sec to 6MB/sec for single file download
when i put two download that 6MB/sec speed will split into two speed
each of them will download 2.7MB/sec

in my 100meg case its completely diffrent. each file wont go up than 3MB/sec which is capable of going beyond 10MB/sec

That is my worries. VM media engineer said some thing about their cabinet bandwith not internet bandwith.


sen

when you went to 10-0mb you wasnt wit h to new cabinet it the same one, rapidshare has to sahre that bandwidht amongest millions of users and if millions of users are trying to download at 100mb ie 12mb/s then do you really think they will achive it nope that the point your missing internet bandiwdht is what the 2nd line tech is trying to say why does it matter if you get 10mb/s in one file or 10mb/s over 4 files your getting your speed it aint virign responbailty ot make sure oyu get it in one file only that oyu get it

[The Installer]

If you were confining your advice to cases where there is analogue TV, then I wouldn't argue. But you didn't say so and that isn't the case any more.

I presume now that you accept my advice to the OP stands as correct.

Fair enough, i'm not worthy, i bow to your higher level of knowledge :D

Yeah i didn't explain myself very well :( however, i was only pointing out that the OP is on QAM64 at present and when they flick over there "could" be an increase in downstream power levels.

As you said there wasn't for you, but there was here and that is all i was pointing out, looking forward more than anything.

Anyway, we are diffferent networks so who knows.

[imaxtec]

Is the Access Info details for VM changeable or non changable? i am getting three diffrent details in three diffrent connection mode

IN Wireless connection via modem mode
Client IP: x.xx.x.xx
Client Host Name: cpc5-rdng20-2-0-cust453.15-3.cable.virginmedia.com

IN superhub wireless connection
Client IP: xx.x.x.xx
Client Host Name: cpc4-rdng20-2-0-cust9.15-3.cable.virginmedia.com

IN Direct cable connection via modem mode
Client IP: xxx.xx.xx.x
Client Host Name: cpc12-rdng20-2-0-cust324.15-3.cable.virginmedia.com

i have noticed my client ip and client host name changed into diffrent details 4 times between this morning to evening

may be this is messing around my connection

cheers
sen

[Sephiroth]

You go in on the same line card. But your IP address is different because it is taken from the DHCP device. The CPCx is the xth sub-net range of IP addresses allocated to the CMTS interface (the line card).

[qasdfdsaq]

What's the point of blanking out your IP?

[imaxtec]

Thanks guys for the reply

Connection Bit better now,Crossed fingers

most of the time is unstable. these are few best results i recived over the last 3days

Morning 10am-12noon
http://tecuniverse.com/wp-content/uploads/Morning 10am-12noon.jpg

Early Morning between 2am-4am
http://tecuniverse.com/wp-content/uploads/100.jpg

1pm to midnight connection crap beween 20meg to 50meg

[imaxtec]

Any Good? my 100meg connection is not stable again. evey day evey hour speed keep changing. not like my old solid 50meg connection
planning to go back to 50meg

Connection

--------------------------------------------------------------------------------

Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 435000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File OK
Security Enabled BPI+


--------------------------------------------------------------------------------

Downstream Channels
Lock Status Modulation Channel ID Max Raw Bit Rate Frequency Power SNR Docsis/EuroDocsis locked
Locked QAM64 236 41712000 Kbits/sec 435000000 Hz 0.0 dBmV 40.3 dB Hybrid
Locked QAM64 237 41712000 Kbits/sec 443000000 Hz 0.0 dBmV 39.5 dB Hybrid
Locked QAM64 238 41712000 Kbits/sec 451000000 Hz -0.5 dBmV 39.0 dB Hybrid
Locked QAM64 239 41712000 Kbits/sec 459000000 Hz -1.6 dBmV 38.7 dB Hybrid
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown
Unlocked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV 0.0 dB Unknown


--------------------------------------------------------------------------------

Upstream Channels
Lock Status Modulation Channel ID Max Raw Bit Rate Frequency Power
Locked ATDMA 2 20480 Kbits/sec 35800000 Hz 40.0 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



--------------------------------------------------------------------------------

Primary Downstream Service Flow
Downstream(0)
SFID 4476
Max Traffic Rate 110000000 bps
Max Traffic Burst 10000 bytes
Mix Traffic Rate 0 bps


--------------------------------------------------------------------------------

Primary Upstream Service Flow
Upstream(0)
SFID 4475
Max Traffic Rate 10250000 bps
Max Traffic Burst 16320 bytes
Mix Traffic Rate 0 bps
Max Concatenated Burst 16320 bytes
Scheduling Type Best Effort

[Andrewcrawford23]

i aint sure but thoery would suggest to me a power levle of 0 is probmatic as there nothing there so to say to push the data but i cant say that for sure maybe someon can confirm ifa power levle of 0 isa problem

[Sephiroth]

dBmv power levels are a relative measure. Actually 0 dBmv represents a power input of 1.33E-08 Watts at 75 ohms impedance. 3 dBmv represents twice that and -3 dBmv represents half that. I've posted a full explanation in the other place.

0 dBmv is ideal as a downstream power level.

[Andrewcrawford23]

dBmv power levels are a relative measure. Actually 0 dBmv represents a power input of 1.33E-08 Watts at 75 ohms impedance. 3 dBmv represents twice that and -3 dBmv represents half that. I've posted a full explanation in the other place.

0 dBmv is ideal as a downstream power level.

cheers for clearing that up i was more thinking relative psyhics laws which 0 would be bad wasnt 100% if it would affect as it ould seem daft everything down to 0 ie 0.0001 and everything below ie -0.0001 etc would be fine