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Event log issues

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Event log issues

I had bought a modem few months  ago from a brand  called Arris sb6183. I had checked the event log on it and was full of errors. There are no splitters currently on my coax cable. How do I go about ffixing these errors?

Downstream Bonded Channels
ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectedUncorrectables
1LockedQAM25617573000000 Hz16.5 dBmV37.7 dB70
2LockedQAM25618579000000 Hz17.3 dBmV37.9 dB240
3LockedQAM25619585000000 Hz18.1 dBmV38.0 dB391
4LockedQAM25620591000000 Hz19.4 dBmV38.2 dB3949
5LockedQAM25621597000000 Hz19.7 dBmV38.1 dB15569
6LockedQAM25622603000000 Hz19.1 dBmV37.8 dB19726
7LockedQAM25623609000000 Hz17.8 dBmV37.5 dB630
8LockedQAM25624615000000 Hz16.6 dBmV37.1 dB8311
9LockedQAM25625621000000 Hz15.9 dBmV37.1 dB4028
10LockedQAM25626627000000 Hz15.1 dBmV36.9 dB2425
11LockedQAM25627639000000 Hz15.3 dBmV36.9 dB1091
12LockedQAM25628645000000 Hz16.5 dBmV37.1 dB8212
13LockedQAM25629651000000 Hz17.6 dBmV37.2 dB12417
14LockedQAM25630657000000 Hz19.0 dBmV37.3 dB233134
15LockedQAM25631663000000 Hz19.9 dBmV37.3 dB485275
16LockedQAM25632669000000 Hz20.3 dBmV37.2 dB895255

 
Upstream Bonded Channels
ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
1LockedATDMA25120 Ksym/sec29200000 Hz40.3 dBmV
2LockedATDMA15120 Ksym/sec35600000 Hz39.3 dBmV
3LockedATDMA35120 Ksym/sec22800000 Hz40.3 dBmV
4LockedATDMA45120 Ksym/sec16400000 Hz40.0 dBmV

Time Priority Description

Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=d4:04:cd:97:5c:a9;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=d4:04:cd:97:5c:a9;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=d4:04:cd:97:5c:a9;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=d4:04:cd:97:5c:a9;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=d4:04:cd:97:5c:a9;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=d4:04:cd:97:5c:a9;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=d4:04:cd:97:5c:a9;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=d4:04:cd:97:5c:a9;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=d4:04:cd:97:5c:a9;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=d4:04:cd:97:5c:a9;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=d4:04:cd:97:5c:a9;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=d4:04:cd:97:5c:a9;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=d4:04:cd:97:5c:a9;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=d4:04:cd:97:5c:a9;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=d4:04:cd:97:5c:a9;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=d4:04:cd:97:5c:a9;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=d4:04:cd:97:5c:a9;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=d4:04:cd:97:5c:a9;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=d4:04:cd:97:5c:a9;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=d4:04:cd:97:5c:a9;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
Time Not EstablishedCritical (3)

SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=d4:04:cd:97:5c:a9;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;

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Expert

Re: Event log issues

The downstream power is way too high / out of spec. Is there an amplifier on the coax line leading to the modem ? If so, remove / bypass it and see.

 

Are you actually having any connectivity problems, or are you just focusing on the errors ?



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Re: Event log issues

Not having the worst connections per say, but I do streaming and gaming and noticed a little more lag than usual and took a look at the modem to find all these errors which I was unsure why it had them. I think the amplifier did the trick in lowering the power levels now.

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Expert

Re: Event log issues

O/k so what are the downstream power numbers now ?



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Re: Event log issues

I still have the errors, but seems like the connection is good from here I'm not sure if iwill cause problems later on. 

 

Downstream Bonded Channels
ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectedUncorrectables
1LockedQAM25617573000000 Hz9.1 dBmV37.0 dB00
2LockedQAM25618579000000 Hz9.7 dBmV37.1 dB00
3LockedQAM25619585000000 Hz10.7 dBmV37.2 dB00
4LockedQAM25620591000000 Hz11.9 dBmV37.2 dB00
5LockedQAM25621597000000 Hz12.3 dBmV37.2 dB00
6LockedQAM25622603000000 Hz11.6 dBmV37.1 dB00
7LockedQAM25623609000000 Hz10.7 dBmV36.9 dB00
8LockedQAM25624615000000 Hz9.4 dBmV36.6 dB00
9LockedQAM25625621000000 Hz8.6 dBmV36.5 dB00
10LockedQAM25626627000000 Hz7.7 dBmV36.2 dB00
11LockedQAM25627639000000 Hz7.9 dBmV36.2 dB00
12LockedQAM25628645000000 Hz9.0 dBmV36.5 dB00
13LockedQAM25629651000000 Hz10.1 dBmV36.6 dB00
14LockedQAM25630657000000 Hz11.5 dBmV36.7 dB00
15LockedQAM25631663000000 Hz12.6 dBmV36.7 dB00
16LockedQAM25632669000000 Hz13.1 dBmV36.6 dB00

 

 
Upstream Bonded Channels
ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
1LockedATDMA25120 Ksym/sec29200000 Hz46.5 dBmV
2LockedATDMA15120 Ksym/sec35600000 Hz45.8 dBmV
3LockedATDMA35120 Ksym/sec22800000 Hz46.8 dBmV
4LockedATDMA45120 Ksym/sec16400000 Hz46.3 dBmV
Highlighted
Expert

Re: Event log issues

The downstream power is still on the high side. You could try using a 6dB forward path only attenuator pad. It will knock down the downstream power level in to the *in spec* range without affecting the upstream power level;

 

https://www.amazon.com/line-Signal-Forward-Attenuator-FPA6-54/dp/B07882H96R

 

Good luck !



I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!