Forum Discussion
- BruceHonored Contributor III
I'll presume you have a DOCSIS 3.1 modem. Did you notice the 32 Downstream QAM channels? QAM channels used to be single channels (SC-QAM) separated by "guard bands."
With D3.1, although you see only 1 OFDM channel, it's 1 channel divided into 32 QAM channels but with orthogonal separation.
- BruceHonored Contributor III
Could you post a copy of your modem logs for a better understanding? You may have to use the Click-to-Join link at the bottom of this page to upload.
- DLabit29Contributor
The ofdm channel
- Dave9Contributor III
Do you mean UNcorrectables or correctables? Lots of correctables on OFDM is normal because of the way OFDM uses FEC. Even up to 100% correctables can be considered normal. But UNcorrectables on any channel and any modulation is never normal. If you have UNcorrectables it means there's a problem with the data getting to your modem. You should never disconnect or connect the coax cable with the modem powered on. This will cause a large number of uncorrectables.
As far as I know Cox only supports 1 downstream OFDM channel and 0 upstream OFDM channels at this time in all areas. 1 OFDM channel is more than enough to support fill gigabit speeds.
- DLabit29Contributor
- Yes. Sorry about that
- Very many correctables which is ok.
- But there is almost always a couple thousand uncorrectables or more.
Related Content
- 11 months ago
- 2 years ago
- 4 years ago