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Ethan_Lister's avatar
Ethan_Lister
Tuning in
7 months ago

Upstream channels in freefall

As of 10pm last night (and for a brief stint between 10pm and 1am the previous night) my upstream channels 2, 3 and 4 have crippled my connection with large amounts of T3 timeouts and lower than expected modulation (16-32 QAM vs expected 64). My downstream is fine achieving gig1 speeds as expected but my upload speed is down to half a megabit vs expected ~100mbps.

Below is my BQM chart for today. 

  • 3.0 Downstream channels

    Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
    13310000005.942QAM 25625
    21790000005.942QAM 2566
    31870000005.942QAM 2567
    41950000006.241QAM 2568
    52030000006.241QAM 2569
    62110000006.441QAM 25610
    72190000006.442QAM 25611
    82270000006.342QAM 25612
    92350000006.242QAM 25613
    102430000006.142QAM 25614
    112510000005.942QAM 25615
    12259000000642QAM 25616
    132670000006.142QAM 25617
    142750000006.142QAM 25618
    152830000006.142QAM 25619
    162910000006.242QAM 25620
    172990000006.142QAM 25621
    183070000006.142QAM 25622
    19315000000642QAM 25623
    203230000005.942QAM 25624
    213390000005.942QAM 25626
    223470000005.942QAM 25627
    233550000005.942QAM 25628
    243630000005.842QAM 25629
    253710000005.842QAM 25630
    263790000005.842QAM 25631
    273870000005.642QAM 25632
    283950000005.842QAM 25633
    294030000005.742QAM 25634
    304110000005.842QAM 25635
    314190000005.842QAM 25636

    3.0 Downstream channels

    Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors
    1Locked4200
    2Locked4220
    3Locked4200
    4Locked4100
    5Locked4110
    6Locked4100
    7Locked4240
    8Locked4200
    9Locked4210
    10Locked4200
    11Locked4220
    12Locked4200
    13Locked4210
    14Locked4210
    15Locked4210
    16Locked4200
    17Locked4200
    18Locked4200
    19Locked4210
    20Locked4230
    21Locked4200
    22Locked4200
    23Locked4210
    24Locked4230
    25Locked4200
    26Locked4200
    27Locked4200
    28Locked4200
    29Locked4210
    30Locked4210
    31Locked4210

    3.1 Downstream channels

    Channel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)
    37944K1840QAM 40961108

    3.1 Downstream channels

    Channel ID Locked Status RxMER Data (dB) PLC Power (dBmV) Corrected errors (Active Profile) Uncorrectable errors (Active Profile)
    37Locked434.4900337590
    • Ethan_Lister's avatar
      Ethan_Lister
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      3.0 Upstream channels

      Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID
      04960000045.85120QAM 327
      14310000045.55120QAM 328
      236600000455120QAM 329
      330100000455120QAM 3210
      42360000044.35120QAM 3211

      3.0 Upstream channels

      Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts
      0ATDMA0000
      1ATDMA0000
      2ATDMA00320
      3ATDMA005040
      4ATDMA0020360

      3.1 Upstream channels

      Channel Channel Width (MHz) Power (dBmV) FFT Type Modulation
      1210.441.52KQAM 256

      3.1 Upstream channels

      Channel Channel Type Number of Active Subcarriers First Active Subcarrier (Hz) T3 Timeouts T4 Timeouts
      12OFDMA2087400000000
      • Ethan_Lister's avatar
        Ethan_Lister
        Tuning in

        I did a pinhole reset only last night at about 11PM. All those T3 timeouts in the upstream channels are since then.