Forum Discussion

Taffeys's avatar
Taffeys
New Contributor III
4 years ago

Dynamic range window violation

I too continue to get these errors on my MB8600 modem:

Dynamic Range Window violation

RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=2c:86:d2:89:c5:5a;CM-QOS=1.1;CM-VER=3.1;

Dynamic Range Window violation

CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=2c:86:d2:89:c5:5a;CM-QOS=1.1;CM-VER=3.1;

CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=2c:86:d2:89:c5:5a;CM-QOS=1.1;CM-VER=3.1;

This same problem was reported here months ago with no final resolution posted by COX nor the OP:

https://forums.cox.com/forum_home/internet_forum/f/internet-forum/26567/dynamic-range-window-violation

I have totally rebuilt the cabling from DEMARC to modem, including new splitters. There are no amplifiers or anything else in the path.

System Up Time  1 days 02h:41m:41s

Downstream Bonded Channels

Channel

Freq. (MHz)

Pwr (dBmV)

SNR (dB)

Corrected

Corrected

   1

855.0

0.6

38.4

538

1555

   2

783.0

0.0

39.1

824

2228

   3

789.0

-0.9

38.6

541

1460

   4

795.0

-1.7

38.2

789

1958

   5

801.0

-2.4

37.7

767

2245

   6

807.0

-2.4

37.7

639

1931

   7

813.0

-1.5

37.8

624

1696

   8

819.0

-0.7

38.0

722

2171

   9

825.0

0.3

38.4

570

1671

   10

831.0

1.2

38.8

581

1616

   11

837.0

1.0

38.7

583

1622

   12

843.0

1.1

38.8

650

2121

   13

849.0

0.6

38.4

502

1447

   14

861.0

0.2

38.1

602

2063

   15

867.0

0.2

38.0

636

2102

   16

873.0

0.6

37.9

705

2374

   17

357.0

1.3

39.1

1660

6783

   18

363.0

0.9

39.3

1110

5041

   19

369.0

1.0

39.4

1522

6867

   20

375.0

1.7

40.0

1133

5020

   21

381.0

1.7

39.9

247

1232

   22

387.0

1.6

40.1

903

4038

   23

393.0

1.7

40.0

1284

5928

   24

399.0

1.5

39.9

1380

5801

   25

405.0

1.2

39.8

1331

5616

   26

411.0

1.2

39.8

1229

5717

   27

417.0

1.0

39.6

1250

5699

   28

423.0

0.7

39.5

1257

5718

   29

429.0

0.9

39.6

1376

5677

   30

435.0

1.1

39.8

1395

5633

   31

441.0

1.2

40.3

1360

5564

   32

447.0

1.3

40.2

1330

5626

 

Upstream Bonded Channels

Channel

Symb. Rate (Ksym/sec)

Freq. (MHz)

Pwr (dBmV)

   1

5120

19.4

37.8

   2

5120

25.8

37.5

   3

5120

32.2

37.3

   4

5120

38.6

38.3

   5

2560

14.6

37.0

I have performed several "hard" factory resets with these same errors returning within seconds or minutes.

What is/are the cause/s? What is the resolution?

  • Allan's avatar
    Allan
    Moderator
    4 years ago
    @Rick Deckard, Your modem is reporting some time out errors. Is it possible to bypass the splitter and plug the modem directly up to the main line? -Allan, Cox Support Forums Moderator.
    • Taffeys's avatar
      Taffeys
      New Contributor III
      4 years ago

      Allan, yes I can do that but not until sometime tomorrow (hopefully).

    • Taffeys's avatar
      Taffeys
      New Contributor III
      4 years ago

      I was not able to direct connect the modem today but I now see that after a full factory reset 28 hours ago I have not had one error on my MB8600 modem. However, I see many corrected and uncorrected errors.

        Channel

      Channel ID

      Freq. (MHz)

      Pwr (dBmV)

      SNR (dB)

      Corrected

      Uncorrected

         1

      9

      831

      2.3

      39

      56

      118

         2

      1

      783

      1.2

      39.5

      49

      125

         3

      13

      855

      1.5

      38.7

      51

      124

         4

      14

      861

      1

      38.3

      50

      124

         5

      15

      867

      0.9

      38.2

      59

      115

         6

      16

      873

      1.2

      38.1

      50

      122

         7

      17

      879

      1.4

      38.1

      63

      111

         8

      21

      903

      1.8

      38.2

      65

      109

         9

      25

      927

      2.6

      37.9

      69

      131

         10

      26

      933

      3.4

      38.3

      59

      130

         11

      27

      939

      3.2

      38.4

      54

      128

         12

      28

      945

      2.7

      38.4

      37

      145

         13

      29

      951

      2.6

      38.5

      46

      133

         14

      30

      957

      3.1

      38.7

      40

      135

         15

      31

      963

      3.6

      38.9

      45

      137

         16

      32

      969

      4

      39

      58

      125

         17

      33

      357

      0.8

      39.2

      49

      129

         18

      34

      363

      0.5

      39.4

      66

      115

         19

      35

      369

      0.5

      39.6

      70

      115

         20

      36

      375

      1.2

      40.2

      61

      118

         21

      37

      381

      1.3

      40

      62

      115

         22

      38

      387

      1.3

      40.1

      61

      119

         23

      39

      393

      1.4

      40.2

      57

      121

         24

      40

      399

      1.2

      40.1

      62

      120

         25

      41

      405

      1

      39.9

      61

      121

         26

      42

      411

      1.1

      39.9

      59

      117

         27

      43

      417

      0.9

      39.8

      54

      126

         28

      44

      423

      0.6

      39.7

      57

      119

         29

      45

      429

      0.7

      39.5

      58

      118

         30

      46

      435

      1

      40

      61

      115

         31

      47

      441

      1.1

      40.2

      48

      130

         32

      48

      447

      1.3

      40.4

      44

      136

       Does this not indicate there is no issue with my hardware/cables/splitter?

      • Allan's avatar
        Allan
        Moderator
        4 years ago
        @Rick Deckard, The modem is still reporting some time out errors. If you are unable to bypass the splitter. then I recommend we have a tech come out and take a look. Please send us an email with your full name, address, and a link to this thread to cox.help@cox.com so we can assist in scheduling the tech. -Allan, Cox Support Forums Moderator.