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Forum Discussion
Netgear Cm1000 Ofdm issues
Okay so im on spectrum's gig plan and it has been a nightmare of a time..... the issue i am having is i keep loosing the lock on the docsis 3.1 ofdm profile and noone can answer me why this is....ive had numerous truck rolls every cable/Fittings has been replaced direct connect to line no splitters or anything. even spectrum specialist has been to the house and still having same issues.
8 Replies
Try a different modem to see if same thing happens or not.
i bought a Sb6800 and spectrum couldnt even get it provisioned for their gig service.... which leaves me with a spectrum modem which they lock you out of the webui so you cannot see Snr or error log
The issues are Cm-status event type code 16 and also 24 the error just cycles cuasing uncorrectables.
You need to contact the ISP and have them review this. They need to check the signal up to the modem and ensure it's working well. If testing another modem results in same better operation, it's possible the CM maybe bad if the ISP checks things out.
- They’ve been out numerous times and when checking the signal with their meter all signals come back good I’m assuming there’s ingress within the plant or noise entering the line briefly somewhere which no one can pinpoint.
you DS power is quite high but that itself may not be the issue.
Are you losing SC-QAM Locks as well?
There was a cm status event type 5 loosing lock on ch11-17 only happened once... still after installing -10db forward path attenuator at the drop to reduce the hot signal some how the power levels are fluctuating from .9-1.5dbmv to 3-4dbmv on downstream... as far as upstream power levels i only see .3 fluctuations and all stay within the 2db of each other
also forwardpath attenuator affects 120-870Mhz so it has little to no effect on upstream.
This is the fluctuation in the downstream power signal I am talking about... so if I have a -10db forward path attenuator to reduce a hot signal what causing downstream power to further increase? Temp of the area has been high 60s and at night mid 40s will 20 degrees cause that much of a fluctuation?
