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stooeh
28-09-2007, 09:00
Hi been having the odd issue with my Cable Modem broad and today its been awful.

Disconnects every 30 mins and comes back on after a few mins. Re-setting the thing doesn't seem to help.

Just have internet and no tv

Im in an ex-Telewest area I believe and I'm using the
Scientfic Atlanta WebSTAR EPC2100R2 CM.

Had a look at your signal settings page and to be honest it's a bit confusing so
I've pasted the current output from my modem.

Downstream Channel
The data shown in the table below provides information about the signal coming from the network to your cable modem.

Downstream Status: Operational
Channel ID: 1
Downstream Frequency: 331000000 Hz
Modulation: 256QAM
Bit Rate: 4096000 bits/sec
Power Level: 16.1 dBmV
Signal to Noise Ratio: 42.1 dB

Upstream Channel
The data shown in the table below provides information about the signal being transmitted to the network from your cable modem.

Upstream Status: Operational
Channel ID: 2
Upstream Frequency: 29200000 Hz
Modulation: 16QAM
Bit Rate: 384000 bits/sec
Power Level: 23.0 dBmV


Are these all acceptable settings or should I call VM and ask for an engineer
cause I'm worried if I get one by the time he comes round it will be fine again.

Oh and im the WF5 postcode area


Stooeh

Druchii
28-09-2007, 09:19
The downstream power level is way too high, it should be hovering around 0, not 16 :)

Ring VM and have them check your signal levels.

altis
28-09-2007, 10:09
Mmmmm... that does look quite high.

Far more details than you'll ever want here:

http://homepage.ntlworld.com/robin.d.h.walker/cmtips/signal.html

Mr.X
28-09-2007, 15:48
Power levels are all over the place. Upstream power should be no more than 55dbvm and Downstream anywhere beteween -10dbmv and +10dbmv. You need a tech, call support you will be credited back for the cost of the call. Signal to Noise ratio and Frequency are fine.

stooeh
01-10-2007, 10:21
Posted the results to the VM newsgroup on friday and they sent a tech this morning who has just fitted an attenuator (i think!) and here are my new signals.

Receive Power Level
0.2 dBmV

Transmit Power Level
39.5 dBmV

These look much better :)

Stoo

Graham M
01-10-2007, 11:22
As long as the connection is stable, that's all that matters