Brownie2k
04-03-2010, 19:18
Hi guys,
Firstly, this is my first post here, i've been browsing for a while, and i must say, i've found this site to be hugely informative and helpful, now, onto my question.
I had 50mb installed around november, and since then my connection has been ok, getting between 44 - 50mb (around 5.0 - 6.1Mb/s) i also noticed that my power levels were a little high, at around 7 - 8, so VM sent an engineer to fit an attenuator to my modem. That brought the levels to about 1 - 2, perfect! or so i thought...
Lately my levels have been rising, they're now at 3 - 5 again, which from what i read is still ok, but i'm worried they'll go higher. I also noticed my speed has been irregular from 36 - 50mb, plus i've had several T3 timeouts and connection just dying for no reason.
Contacted VM tonight and they said they're aware of a national issue where the cards in the local green boxes are going faulty and they're being investigated. Has anyone else heard this? The person at VM mentioned i'd had 30 power changes or something in the last 24 hours and contacted a senior member who did tests and mentioned this issue. So i'm a little confused there.
Do these settings look ok to everyone? Or do i have a problem?
Cable Modem Downstream
DS-1 DS-2 DS-3 DS-4
Frequency 298750000 306750000 314750000 322750000
Lock Status
(QAM Lock/FEC Sync/MPEG Lock) Y/Y/Y Y/Y/Y Y/Y/Y Y/Y/Y
Channel Id 1 2 3 4
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) 3.96 3.65 3.25 3.32
RxMER
(dB) 37.09 37.36 37.36 37.94
Correctable
Codewords 3 0 0 0
Uncorrectable
Codewords 303 261 260 259
Cable Modem Upstream
US-1 US-2 US-3 US-4
Channel Type 1.0 N/A N/A N/A
Channel ID 3 N/A N/A N/A
Frequency
(Hz) 45800000 N/A N/A N/A
Ranging Status Success N/A N/A N/A
Modulation 16QAM N/A N/A N/A
Symbol Rate
(KSym/sec) 2560 N/A N/A N/A
Mini-Slot Size 2 N/A N/A N/A
Power Level
(dBmV) 52.75 N/A N/A N/A
T1 Timeouts 0
T2 Timeouts 0 0 0 0
T3 Timeouts 0 0 0 0
T4 Timeouts 0 0 0 0
I'm in the Eccles, Manchester area and i'm currently connected too:
cpc2-ward9-2-0-MOD EDIT.cable.virginmedia.com
The codewords have varied from 0 - 50,000+ on correctable and from 0 - 3000 on the uncorrectable. Most appear to be on DS1.
Also, does anyone know where i can get myself a 10db attenuator to lower my power levels if/when they get too high? I'm not too sure what i should be looking at, and VM have said there is nowhere i can get them from, besides themselves, and they wont provide one.
Thanks for any help!
Paul
Firstly, this is my first post here, i've been browsing for a while, and i must say, i've found this site to be hugely informative and helpful, now, onto my question.
I had 50mb installed around november, and since then my connection has been ok, getting between 44 - 50mb (around 5.0 - 6.1Mb/s) i also noticed that my power levels were a little high, at around 7 - 8, so VM sent an engineer to fit an attenuator to my modem. That brought the levels to about 1 - 2, perfect! or so i thought...
Lately my levels have been rising, they're now at 3 - 5 again, which from what i read is still ok, but i'm worried they'll go higher. I also noticed my speed has been irregular from 36 - 50mb, plus i've had several T3 timeouts and connection just dying for no reason.
Contacted VM tonight and they said they're aware of a national issue where the cards in the local green boxes are going faulty and they're being investigated. Has anyone else heard this? The person at VM mentioned i'd had 30 power changes or something in the last 24 hours and contacted a senior member who did tests and mentioned this issue. So i'm a little confused there.
Do these settings look ok to everyone? Or do i have a problem?
Cable Modem Downstream
DS-1 DS-2 DS-3 DS-4
Frequency 298750000 306750000 314750000 322750000
Lock Status
(QAM Lock/FEC Sync/MPEG Lock) Y/Y/Y Y/Y/Y Y/Y/Y Y/Y/Y
Channel Id 1 2 3 4
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) 3.96 3.65 3.25 3.32
RxMER
(dB) 37.09 37.36 37.36 37.94
Correctable
Codewords 3 0 0 0
Uncorrectable
Codewords 303 261 260 259
Cable Modem Upstream
US-1 US-2 US-3 US-4
Channel Type 1.0 N/A N/A N/A
Channel ID 3 N/A N/A N/A
Frequency
(Hz) 45800000 N/A N/A N/A
Ranging Status Success N/A N/A N/A
Modulation 16QAM N/A N/A N/A
Symbol Rate
(KSym/sec) 2560 N/A N/A N/A
Mini-Slot Size 2 N/A N/A N/A
Power Level
(dBmV) 52.75 N/A N/A N/A
T1 Timeouts 0
T2 Timeouts 0 0 0 0
T3 Timeouts 0 0 0 0
T4 Timeouts 0 0 0 0
I'm in the Eccles, Manchester area and i'm currently connected too:
cpc2-ward9-2-0-MOD EDIT.cable.virginmedia.com
The codewords have varied from 0 - 50,000+ on correctable and from 0 - 3000 on the uncorrectable. Most appear to be on DS1.
Also, does anyone know where i can get myself a 10db attenuator to lower my power levels if/when they get too high? I'm not too sure what i should be looking at, and VM have said there is nowhere i can get them from, besides themselves, and they wont provide one.
Thanks for any help!
Paul