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- OFDM | Cox Community
Do you mean upstream OFDMA or downstream OFDM? I thought most areas had at least 1 downstream OFDM channel to be compatible with DOCSIS 3 1 and 940Mbps (AKA Go Super Fast) speed tier
- OFDM PLC errors on MB8600. on Firmware 8600-19. 3. 15.
Only Channel 33 is an issue which is OFDM PLC All other channels have no correctable or uncorrectable errors in the last 24 hours There are about 43 0million correctable errors on Channel 33 in the last 36 hours, no uncorrectable errors They climb at an astonishing rate As you may be able to tell, signal is 10 8 dBmV, SNR is 45 1
- Weird issue with OFDM channel causing disconnects
From what I understand, you want to see a lot of correctable errors on the OFDM channel because that means it's running at its maximum possible speed When you start seeing uncorrectable errors, that's when you should worry I think the messages you're seeing are just the modem shuffling around OFDM profiles for maximum performance
- Upstream OFDM is coming | Cox Community - Cox Support Forums
Basically upstream OFDM is being enabled in some areas along with a extra downstream OFDM channel No new upstream speeds have been announced but I predict they are coming Seems if you have 8 upstream channels you are close to an upgrade
- List of all CM-STATUS event type codes with explanations
The Next Codeword Pointer (NCP) is a portion of the downstream OFDM channel which is dedicated to carry information about the mapping of FEC codewords to subcarriers within a symbol NCP is generally considered a part of the Downstream Convergence Layer [DOCSIS PHYv3 1] includes a detailed description of the NCP
- Continuous event code 16 OFDM Profile Failure | Cox Community
But event log shows continuous type 16 FEC errors with around 1 - 2 min intervals OFDM OFDMA Profile ID
- Acceptable Limits on Correctable and Unorrectable
33 Locked OFDM PLC 159 300 0 9 4 43 3 40384231 145717 Upstream Bonded Channels Channel Lock Status Channel Type Channel ID Symb Rate (Ksym sec) Freq (MHz) Pwr (dBmV) 1 Locked SC-QAM 1 5120 19 3 45 8 2 Locked SC-QAM 2 5120 25 8 45 8 3 Locked SC-QAM 3 5120 32 2 45 8 4 Locked SC-QAM 4 5120 38 6 46 8
- Same problem as many Warning (5) Dynamic Range Window violation
The DRW violations are the least of your worries You have major ingress on the 900 MHz ISM band (902 - 927 MHz) and moderate ingress on the lower band (300 - 450 MHz) as shown by the number of uncorrectable codewords on those channels
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