Billy-Bob
28-12-2009, 12:24
I've noticed that one of the 3 downstream channel power levels for my 50Mb service is higher than the other 2;
Cable Modem Downstream
DS-1 DS-2 DS-3 DS-4
Frequency 306750000 298750000 314750000 N/A
Lock Status
(QAM Lock/FEC Sync/MPEG Lock) Y/Y/Y Y/Y/Y Y/Y/Y N/N/N
Channel Id 61 60 62 N/A
Modulation 256QAM 256QAM 256QAM N/A
Symbol Rate
(Msym/sec) 6.952 6.952 6.952 N/A
Interleave Depth I=12
J=17 I=12
J=17 I=12
J=17 N/A
Power Level
(dBmV) 6.83 7.23 6.51 N/A
RxMER
(dB) 38.61 38.26 38.26 N/A
Correctable
Codewords 275873 18969 250214 N/A
Uncorrectable
Codewords 3500 294 2139 N/A
I believe this is outside the ideal range (up to 7.00?) for 50Mb, and I'm wondering if it could be contributing to the sporadic drops in speed I've started seeing in the last week (of course, the speed drop is just as likely to be due to the fact that everyone is off work and bored = surfing the internet!)
Is this normal, or should the channel power levels all be about the same?
Cable Modem Downstream
DS-1 DS-2 DS-3 DS-4
Frequency 306750000 298750000 314750000 N/A
Lock Status
(QAM Lock/FEC Sync/MPEG Lock) Y/Y/Y Y/Y/Y Y/Y/Y N/N/N
Channel Id 61 60 62 N/A
Modulation 256QAM 256QAM 256QAM N/A
Symbol Rate
(Msym/sec) 6.952 6.952 6.952 N/A
Interleave Depth I=12
J=17 I=12
J=17 I=12
J=17 N/A
Power Level
(dBmV) 6.83 7.23 6.51 N/A
RxMER
(dB) 38.61 38.26 38.26 N/A
Correctable
Codewords 275873 18969 250214 N/A
Uncorrectable
Codewords 3500 294 2139 N/A
I believe this is outside the ideal range (up to 7.00?) for 50Mb, and I'm wondering if it could be contributing to the sporadic drops in speed I've started seeing in the last week (of course, the speed drop is just as likely to be due to the fact that everyone is off work and bored = surfing the internet!)
Is this normal, or should the channel power levels all be about the same?