Forum Discussion

Whyme's avatar
Whyme
New Contributor II
4 years ago
Solved

Same problem as many "Warning (5) Dynamic Range Window violation"

I have been dealing with internet speed issues for about a year now. I was told my modem was bad replaced that, I was told it was a problem with the cabling in the house (not covered) I installed a new homerun to the termination outside, then it was I was maxing my bandwidth so I upgraded to gigabit, then the cable again (replaced again) now I am being told the modem is bad again. 

modems used: ARRIS SURFboard SBG6782-AC DOCSIS 3.0 Cable Modem and AC1750 Wi-Fi Router > Motorola 16x4 Cable Modem, Model MB7420, 686 Mbps DOCSIS 3.0 > NETGEAR Cable Modem CM600

Current setup: 

Modem: MOTOROLA MB8600 DOCSIS 3.1 Cable Modem 

Router: Netgear Nighthawk R7960P Firmware Version V1.4.1.50_1.3.10

Any help is appreciated and welcome, anything other than its a bad modem or coax.

Error logs: 

15:56:03 Thu Oct 29 2020 Notice (6) CM-STATUS message sent. Event Type Code: 2; Chan ID: 24; DSID: N/A;
MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CMMAC=
15:56:04
Thu Oct 29
2020
Notice (6) CM-STATUS message sent. Event Type Code: 5; Chan ID: 22 23 24 25; DSID:
N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CMMAC
16:05:27
Thu Oct 29
2020
Notice (6) CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A;
MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CMMAC
16:05:52
Thu Oct 29
2020
Notice (6) CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A;
MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CMMAC=
16:33:22
Thu Oct 29
2020
Warning
(5)
RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top
of the DRW;CM-MAC
16:33:22
Thu Oct 29
2020
Warning
(5)
Dynamic Range Window violation
17:58:35
Thu Oct 29
2020
Warning
(5)
RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top
of the DRW;CM-MAC
17:58:35
Thu Oct 29
2020
Warning
(5)
Dynamic Range Window violation
17:59:54
Thu Oct 29
2020
Warning
(5)
RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value
Corresponding to the Top of the DRW;CM-MAC
17:59:54
Thu Oct 29
2020
Warning
(5)
Dynamic Range Window violation

And it keeps going, I can upload more if need be 

system channel status 

Connection
   Startup Sequence    
   Startup Step Status Comment

  
   Acquire Downstream Channel 855000000 Hz Locked
  
   Upstream Connection OK Operational
  
   Boot State OK Operational

  
   Configuration File OK
  
   Security Enabled BPI+
  



   Connection Status    
   System Up Time 5 days 13h:20m:02s  
  
   Network Access Allowed  
  



   Downstream Bonded Channels  
  
   Channel Lock Status Modulation Channel ID Freq. (MHz) Pwr (dBmV) SNR (dB) Corrected Uncorrected
   1 Locked QAM256 21 903.0 2.0 41.8 510523 475607
   2 Locked QAM256 5 807.0 4.1 42.9 0 0
   3 Locked QAM256 13 855.0 2.8 42.2 11 0
   4 Locked QAM256 19 891.0 2.2 41.5 4 0
   5 Locked QAM256 20 897.0 2.2 41.8 0 0
   6 Locked QAM256 22 909.0 2.0 41.7 377648 358011
   7 Locked QAM256 23 915.0 2.1 41.7 105008 192056
   8 Locked QAM256 24 921.0 1.9 41.6 102596 186563
   9 Locked QAM256 25 927.0 1.8 41.2 199700 247292
   10 Locked QAM256 26 933.0 1.5 41.2 0 0
   11 Locked QAM256 27 939.0 1.4 41.0 0 0
   12 Locked QAM256 28 945.0 1.4 40.9 0 0
   13 Locked QAM256 29 951.0 1.3 40.7 0 0
   14 Locked QAM256 30 957.0 1.3 40.6 1 0
   15 Locked QAM256 31 963.0 1.3 40.4 0 0
   16 Locked QAM256 32 969.0 1.4 40.4 0 0
   17 Locked QAM256 33 357.0 8.1 43.2 130 256
   18 Locked QAM256 34 363.0 8.1 43.9 223 224
   19 Locked QAM256 35 369.0 8.1 44.0 170 240
   20 Locked QAM256 36 375.0 8.1 43.8 119 256
   21 Locked QAM256 37 381.0 8.1 44.1 131 201
   22 Locked QAM256 38 387.0 8.1 43.9 151 231
   23 Locked QAM256 39 393.0 8.2 44.2 125 208
   24 Locked QAM256 40 399.0 8.2 44.3 120 185
   25 Locked QAM256 41 405.0 8.2 44.3 140 183
   26 Locked QAM256 42 411.0 8.1 43.9 68 212
   27 Locked QAM256 43 417.0 8.1 44.3 117 110
   28 Locked QAM256 44 423.0 8.1 44.3 118 121
   29 Locked QAM256 45 429.0 8.1 44.2 111 163
   30 Locked QAM256 46 435.0 8.0 44.2 42 145
   31 Locked QAM256 47 441.0 7.9 44.2 57 153
   32 Locked QAM256 48 447.0 7.8 44.1 38 130
   33 Locked OFDM PLC 159 300.0 8.1 16.7 1542943580 275



   Upstream Bonded Channels  
  
   Channel Lock Status Channel Type Channel ID Symb. Rate (Ksym/sec) Freq. (MHz) Pwr (dBmV)
   1 Locked SC-QAM 1 5120 16.9 38.0
   2 Locked SC-QAM 2 5120 23.5 37.8
   3 Locked SC-QAM 3 5120 29.9 37.8
   4 Locked SC-QAM 4 5120 36.3 38.3
   5 Locked SC-QAM 5 5120 60.0 39.8
   6 Locked SC-QAM 6 5120 67.0 40.3
   7 Locked SC-QAM 7 5120 74.0 40.8
   8 Locked SC-QAM 8 5120 81.0 40.8
  • The DRW violations are the least of your worries. You have major ingress on the 900 MHz ISM band (902 - 927 MHz) and moderate ingress on the lower band (300 - 450 MHz) as shown by the number of uncorrectable codewords on those channels. It's caused your modem to lose partial service at least once as shown by the CM-STATUS event code 2 (QAM/FEC lock failure) and it's probably happened a lot more than that. If you've replaced your interior coax with brand new high quality RG6 then the problem lies outside of your home and maybe off of your property. Only a Cox technician can identify and fix that type of problem.

11 Replies

  • Dave9's avatar
    Dave9
    Contributor III

    The DRW violations are the least of your worries. You have major ingress on the 900 MHz ISM band (902 - 927 MHz) and moderate ingress on the lower band (300 - 450 MHz) as shown by the number of uncorrectable codewords on those channels. It's caused your modem to lose partial service at least once as shown by the CM-STATUS event code 2 (QAM/FEC lock failure) and it's probably happened a lot more than that. If you've replaced your interior coax with brand new high quality RG6 then the problem lies outside of your home and maybe off of your property. Only a Cox technician can identify and fix that type of problem.

    • Whyme's avatar
      Whyme
      New Contributor II

      I know automotive electrical diagnostics and basic electronics. I got the cable from the same place most others get there's Amazon. Had good reviews and some reviewers said they were network engineers. 

      THE CIMPLE CO - 100' Feet, Black RG6 Coaxial Cable - Made in The USA - with Rubber booted - Weather Proof - Outdoor Rated Connectors, F81 / RF, Digita

      www.amazon.com/.../ref=ppx_yo_dt_b_search_asin_title

  • jlh2017's avatar
    jlh2017
    New Contributor

    The only thing that will help is a new internet service. Cox does not help their customers they just take your money .

    • JonathanJ's avatar
      JonathanJ
      Former Moderator
      @ jlh2017


      I'm also happy to address any issues you may have with your Cox internet. Feel free email to us and send cox.help@cox.com. Also, include your full street address and full name.


      Jonathan J
      Cox Moderator
  • @Whyme, It looks like your modem was reporting some issues on the 29th. I was able to also find some time out errors as well. However, I am no longer seeing any time out errors since. Are you still experiencing issues with the service? -Allan, Cox Support Forums Moderator.
    • Whyme's avatar
      Whyme
      New Contributor II

      Only one warning for dynamic range today, 

      18:42:46
      Fri Oct 30 2020
        Warning (5)   Dynamic Range Window violation
      • ChrisL's avatar
        ChrisL
        Former Moderator
        Should you keep seeing such messages and connection issues it may be necessary for a technician to come out and troubleshoot further. If you would like assistance getting that setup feel free to email us at cox.help@cox.com.

        -Chris
  • ChesapeakeChris's avatar
    ChesapeakeChris
    New Contributor III

    What is your Mbps speed from your router via ethernet and your WiFi speed standing next to your router (both 2.4 GHz & 5 GHz)?

    What is the speed you are paying for?

    • Whyme's avatar
      Whyme
      New Contributor II

      I run my speed tests from a wired (Cat7) computer. 

      Speeds fluctuate 900+ to 350 down, 0-30 up