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Taffeys

New Contributor III

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45 Messages

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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?

Discussions

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Updated 

2.3K

1

0

0

Allan

Moderator

 • 

2.3K Messages

@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.

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0

Taffeys

New Contributor III

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45 Messages

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

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Taffeys

New Contributor III

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45 Messages

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?

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Allan

Moderator

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2.3K Messages

@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.

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Taffeys

New Contributor III

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45 Messages

I was able to schedule time yesterday to connect the modem directly to the DEMARC. No issues after 4 hours so I changed out the first splitter for a new one and now after 24 hours the modem has not reported any errors and just a few Corrected. I'll give it a few more days.

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Allan

Moderator

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2.3K Messages

@Rick, Please let us know if the issue returns. We will be here to help. -Allan, Cox Support Forums Moderator.

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