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Forum Discussion

Aspirant

Apr 17, 2020

Solved

Slow download speed

Hi, all, My Comcast cable internet has been only running at less than one third of the 75Mbps advertised download speed. When I use Zoom chat to work remotely, the incoming audio/video is really bad...

plemans
Apr 18, 2020
So the uncorrectables are a bit high. If you have any splitters, attenuators, amplifiers in line, remove them. If you still get that many errors, the isp needs to check the line.
And you know your speeds from the cm400 is at least 80mbps download.
Do you have a different device you can test with?

Aspirant

Apr 17, 2020

Sorry, the attached image might be hard to view. Here is the table I copy-n-pasted. Are the power levels normal? Are the error rates OK?

Downstream Bonded Channels

Channel	Lock Status	Modulation	Channel ID	Frequency	Power	SNR	Correctables	UnCorrectables
1	Locked	QAM 256	4	423000000 Hz	8.0 dBmV	36.8 dB	1398	9992
2	Locked	QAM 256	5	429000000 Hz	8.4 dBmV	37.3 dB	1796	9494
3	Locked	QAM 256	6	435000000 Hz	8.3 dBmV	37.3 dB	1251	11013
4	Locked	QAM 256	7	441000000 Hz	8.4 dBmV	37.3 dB	1210	10991
5	Locked	QAM 256	8	447000000 Hz	8.3 dBmV	37.6 dB	1391	9984
6	Locked	QAM 256	9	453000000 Hz	8.0 dBmV	37.3 dB	1556	9849
7	Locked	QAM 256	10	459000000 Hz	7.9 dBmV	37.6 dB	1361	11049
8	Locked	QAM 256	11	465000000 Hz	7.7 dBmV	37.0 dB	1516	12217

Upstream Bonded Channels

Channel	Lock Status	US Channel Type	Channel ID	Symbol Rate	Frequency	Power
1	Locked	ATDMA	1	5120 Ksym/sec	17300000 Hz	47.3 dBmV
2	Locked	ATDMA	2	5120 Ksym/sec	23700000 Hz	46.5 dBmV
3	Locked	ATDMA	3	5120 Ksym/sec	30300000 Hz	45.8 dBmV
4	Locked	ATDMA	4	5120 Ksym/sec	36700000 Hz	45.3 dBmV