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B_G_M's avatar
B_G_M
New Contributor II
12 months ago

Downstream bonded channel lock

Downstream bonded channel lock

Looking for some input for the below downstream channel lock, I can receive all locks on the downstream bonded channels if I change to a lower frequency, but once the modem selects a higher channel at least one channel is not locked. Any input is welcomed. see below modem readings.

Frequency start Value
This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect.
Starting Frequency

Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 855000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Security Enabled BPI+
IP Provisioning Mode Honor MDD honorMdd(4)

Downstream Bonded Channels (Partial Service)
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 45 855000000 Hz 4.4 dBmV 40.3 dB 0 0
2 Locked QAM256 13 189000000 Hz 4.2 dBmV 39.9 dB 23 27
3 Locked QAM256 25 735000000 Hz 4.8 dBmV 39.3 dB 0 0
4 Locked QAM256 26 741000000 Hz 4.8 dBmV 38 dB 0 0
5 Locked QAM256 29 759000000 Hz 5 dBmV 40.2 dB 0 0
6 Locked QAM256 30 765000000 Hz 5.3 dBmV 40.1 dB 0 0
7 Locked QAM256 31 771000000 Hz 5.3 dBmV 41.2 dB 0 0
8 Locked QAM256 32 777000000 Hz 5.2 dBmV 41.2 dB 0 0
9 Locked QAM256 33 783000000 Hz 5.2 dBmV 41.2 dB 0 0
10 Locked QAM256 34 789000000 Hz 4.9 dBmV 40.9 dB 0 0
11 Locked QAM256 35 795000000 Hz 5 dBmV 40.9 dB 0 0
12 Locked QAM256 36 801000000 Hz 4.6 dBmV 40.7 dB 0 0
13 Locked QAM256 37 807000000 Hz 4.6 dBmV 40.7 dB 0 0
14 Locked QAM256 46 861000000 Hz 4 dBmV 40.2 dB 0 0
15 Locked QAM256 47 867000000 Hz 3.7 dBmV 40 dB 7 0
16 Not Locked Unknown 48 873000000 Hz 0.0 dBmV 0.0 dB 0 0

Upstream Bonded Channels (Partial Service)
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Not Locked Unknown 4 0 Ksym/sec 36700000 Hz 0.0 dBmV
2 Locked ATDMA 1 5120 Ksym/sec 17400000 Hz 47.7 dBmV
3 Locked ATDMA 2 5120 Ksym/sec 23900000 Hz 47.8 dBmV
4 Locked ATDMA 3 5120 Ksym/sec 30300000 Hz 47.8 dBmV

Current System Time:Wed Aug 09 15:18:18 2023

-----------------------------------------------------------------------

Procedure Status Comment
Acquire Downstream Channel 141000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Security Enabled BPI+
IP Provisioning Mode Honor MDD honorMdd(4)

Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 5 141000000 Hz 4 dBmV 40.2 dB 216 49
2 Locked QAM256 1 117000000 Hz 4.4 dBmV 40.1 dB 3912 340
3 Locked QAM256 2 123000000 Hz 4.3 dBmV 40.2 dB 1239 272
4 Locked QAM256 3 129000000 Hz 4 dBmV 40.3 dB 482 233
5 Locked QAM256 4 135000000 Hz 3.9 dBmV 40.3 dB 230 57
6 Locked QAM256 6 147000000 Hz 4.3 dBmV 40.3 dB 167 101
7 Locked QAM256 7 153000000 Hz 4.4 dBmV 40.3 dB 171 78
8 Locked QAM256 8 159000000 Hz 4.5 dBmV 40.9 dB 167 24
9 Locked QAM256 9 165000000 Hz 4.7 dBmV 41.2 dB 231 111
10 Locked QAM256 10 171000000 Hz 4.6 dBmV 40 dB 162 30
11 Locked QAM256 11 177000000 Hz 4.6 dBmV 41 dB 249 52
12 Locked QAM256 12 183000000 Hz 4.7 dBmV 41.4 dB 231 30
13 Locked QAM256 13 189000000 Hz 4.9 dBmV 41.7 dB 163 28
14 Locked QAM256 14 195000000 Hz 4.7 dBmV 41.7 dB 147 28
15 Locked QAM256 15 201000000 Hz 5.1 dBmV 42 dB 159 0
16 Locked QAM256 16 207000000 Hz 5.2 dBmV 42.3 dB 138 0

Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 3 5120 Ksym/sec 30300000 Hz 45.6 dBmV
2 Locked ATDMA 1 5120 Ksym/sec 17400000 Hz 45.6 dBmV
3 Locked ATDMA 2 5120 Ksym/sec 23900000 Hz 45.6 dBmV
4 Locked ATDMA 4 5120 Ksym/sec 36700000 Hz 45.6 dBmV

Current System Time:Thu Jul 27 14:56:25 2023

5 Replies

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  • WiderMouthOpen's avatar
    WiderMouthOpen
    Esteemed Contributor

    Just to rule out the basic stuff, can you describe how the coaxial gets from the street to the room the modem is in? Any splitters/amps/filters? Also, is it a SB6183?

    • B_G_M's avatar
      B_G_M
      New Contributor II

      The coaxial is routed from the street to a cable box on the outside of the home -> home network panel (one splitter) -> to the cable modem (Netgear cm500).

      There is an amp on another coaxial line for the television and a modem for the telephone connection.

      • WiderMouthOpen's avatar
        WiderMouthOpen
        Esteemed Contributor

        What model phone modem(eMTA) do you have? Not sure you can log in to a eMTA that is provisioned for only telephone, but if you can, do you see the same problem?

        Also, what is the reason you are using your own modem? With Cox phone you can get a free lease on a data/phone D3.1 eMTA TM3402.