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Only 3 Downstream Channels. Used to get more. Also a Power Difference. What changed?

NETWizzNETWizz Posts: 25
in Connectivity Nov 03, 2018

This is this year vs last year.  What did Spectrum change?  How do I get it fixed?


This is what I currently have...Signas.jpg This is what I had a year ago (per a post I made here):


DownstreamBonding Channel Value
Channel ID17 18 19 20 21 22 23 24 
Frequency555000000 Hz 561000000 Hz 567000000 Hz 573000000 Hz 579000000 Hz 585000000 Hz 591000000 Hz 597000000 Hz 
Signal to Noise Ratio37 dB 37 dB 38 dB 37 dB 36 dB 37 dB 37 dB 37 dB 
Downstream ModulationQAM256 QAM256 QAM256 QAM256 QAM256 QAM256 QAM256 QAM256 
Power Level
The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading
1 dBmV  1 dBmV  2 dBmV  1 dBmV  2 dBmV  2 dBmV  2 dBmV  2 dBmV  


UpstreamBonding Channel Value
Channel ID
Frequency24200000 Hz 37000000 Hz 30600000 Hz 19400000 Hz 
Ranging Service ID2137 2137 2137 2137 
Symbol Rate5.120 Msym/sec 2.560 Msym/sec 5.120 Msym/sec 2.560 Msym/sec 
Power Level43 dBmV 43 dBmV 43 dBmV 43 dBmV 
Upstream Modulation[3] QPSK
[1] 16QAM
[2] 64QAM
[3] QPSK
[1] 16QAM
[2] 64QAM
[3] QPSK
[1] 16QAM
[2] 64QAM
[3] QPSK
[2] 16QAM
Ranging StatusSuccess Success Success Success 


Signal Stats (Codewords)Bonding Channel Value
Channel ID17 18 19 20 21 22 23 24 
Total Unerrored Codewords4646170 3795829 3804014 3787296 3778238 3778431 3778008 3782323 
Total Correctable Codewords13 15 16 
Total Uncorrectable Codewords601 598 585 493 601 1406 689 










Best Answer

  • Julia_RJulia_R Posts: 4,168 Lead Mod
    Nov 03, 2018 Accepted Answer

    Looking at your modem connection here through our system we definitely 

    do need to get a technician out. I am seeing 2 missing upstreams and bad

    levels on RX and SNR. 


    I encourage you to contact support directly to get something scheduled. 


    Twitter: @Ask_Spectrum

    Facebook: https://www.facebook.com/Spectrum




    Julia R.

    Spectrum-Social Media Customer Care

    Lead Moderator-Community Forums


  • LGTLGT Posts: 94 ✭✭✭✭
    Nov 03, 2018

    Since no one else has commented I will take a stab at it.  You have real problems here. You should have 8 downstream channels. Your signals downstream should all be about the same level. What is weird about this is while your downstream channels have changed dramatically since your last readings your upstream are about the same. This makes me think it might not be the standard problem of a cableing issue but something more serious. That being said I do recommend you check all your cables. No open splitters, bad cables, bad connectors, etc..


    You will probably need to have a tech out to check their equipment. Also your modem might be going bad.  Do a modem reset and see if things get better. If you have a high speed plan this must be effecting your speeds. You will want to get this looked at. 

  • reds91185reds91185 Posts: 2,452
    Nov 05, 2018

    Agreed. You have serious issues, probably coax related. A tech definitely needs to come out and check the wiring for loose or corroded connectors, water-logged access boxes at the street or alley if underground, damaged cable in overhead lines, etc. You can check for these items in areas you have access, like from the drop to your house to the modem.


    Do you know if your neighbors are having similar issues? Could be a bad amp feeding the entire street.

This discussion has been closed.