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Downstream Corrected and Uncorrectables

Frequent Visitor

Downstream Corrected and Uncorrectables

What is causing my Downstream Bonded Channels to have high numbers of Corrected and Uncorrectables?  I checked my modem status today and some channels had hundreds of them.  However, once I rebooted the modem and router all when back to zero.   Is this a problem on my end or something going on down the line?

Expert

Re: Downstream Corrected and Uncorrectables

What do the modem's signal stats look like ? Try getting them here http://192.168.100.1 or here http://10.0.0.1

Please post the *Downstream Power Level*, the *Upstream Power Level*, and the *SNR* (Signal to Noise Ratio) numbers.

What is the exact make and model number of the modem ?




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Frequent Visitor

Re: Downstream Corrected and Uncorrectables

Channel Lock Status Modulation Channel ID Frequency Power SNR Corrected Uncorrectables
1 Locked QAM256 4 471000000 Hz -1.4 dBmV 40.0 dB 0 0
2 Locked QAM256 1 453000000 Hz -1.0 dBmV 40.2 dB 0 0
3 Locked QAM256 2 459000000 Hz -1.2 dBmV 40.1 dB 0 0
4 Locked QAM256 5 477000000 Hz -1.5 dBmV 40.0 dB 0 0
5 Locked QAM256 6 483000000 Hz -1.5 dBmV 40.0 dB 0 0
6 Locked QAM256 8 495000000 Hz -1.5 dBmV 39.9 dB 0 0
7 Locked QAM256 10 525000000 Hz -1.9 dBmV 39.8 dB 0 0
8 Locked QAM256 11 531000000 Hz -2.0 dBmV 39.7 dB 0 0
9 Locked QAM256 12 537000000 Hz -2.0 dBmV 38.8 dB 0 0
10 Locked QAM256 14 549000000 Hz -2.2 dBmV 39.7 dB 0 0
11 Locked QAM256 15 555000000 Hz -2.3 dBmV 39.7 dB 0 0
12 Locked QAM256 17 567000000 Hz -2.4 dBmV 39.6 dB 0 0
13 Locked QAM256 18 573000000 Hz -2.4 dBmV 39.7 dB 0 0
14 Locked QAM256 23 603000000 Hz -2.7 dBmV 39.5 dB 0 0
15 Locked QAM256 28 633000000 Hz -3.2 dBmV 39.2 dB 0 0
16 Locked QAM256 30 645000000 Hz -2.8 dBmV 39.3 dB 0 0

 

 
Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 2 5120 Ksym/sec 23700000 Hz 49.0 dBmV
2 Locked ATDMA 3 5120 Ksym/sec 30100000 Hz 49.0 dBmV
3 Locked ATDMA 4 5120 Ksym/sec 36500000 Hz 49.0 dBmV
Expert

Re: Downstream Corrected and Uncorrectables

The upstream power is a bit high but is alright as long as it isn't fluctuating higher out of spec. Ever notice if it fluctuates in to the 51-53 dB area ? The downstream power and the SNR's are good. A couple hundred uncorrectable errors really is all that high especially if the unerrored codewords are very high. It all depends on the ratio between them.

 

Are you actually experiencing any connectivity / speed problems or are you just focusing on the errors ? If it is the latter, I wouldn't sweat it.



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Frequent Visitor

Re: Downstream Corrected and Uncorrectables

The Upstream has been in the 47 range since they did something on the pole to bring it down from the 51 range a few months ago, but has inched up a bit since it has got warmer.  No connectivity problems.

Expert

Re: Downstream Corrected and Uncorrectables

Well if you don't have problems, then why worry about anything ?



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