Snowguy2's profile

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9 Messages

Mon, Jan 4, 2021 11:00 AM

New Router Motorola MB8600 very slow

2 days ago I upgraded to a new modem - MB8600 from an old SB6121.

 

A week ago I upgraded from 200 Mbps to a Gigabit plan. 

 

After activating the MB8600 online, I checked my internet speeds which now = 30-32 Mbps download and 40 Mbps upload. Previously, I was getting 130 Mbps with a slower plan and my old SB6121. The blue download light is flashing on the new modem, the upload light is solid. I've tried running speed tests directly from my modem and also through my router, there is no difference in speed. 

 

I've called Comcast and have chatted with numerous agents, some of which say there is a signal issue on their end but the last 2 I've chatted with say there's no issue on their end. All they want to do is send a tech out to my house which doesn't seem helpful. 

 

Any thoughts or ideas? I know others have had this issue but I'm not sure what their resolution was. Here's some info from my modem below: 

Snowguy2_0-1609789092065.pngSnowguy2_1-1609789101562.png

 

Responses

Accepted Solution

EG

Expert

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87K Messages

5 m ago

The upstreams are o/k but there is a serious signal / connection problem with the downstreams. There appears to be a serious case of reverse cable tilt ! Some of the carriers are not even locked and some are out of spec (including some of the SNR's.

 

It may be best for you to get a tech out to investigate this / balance the line.

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9 Messages

5 m ago

Ahhh bummer. 

Well, here's maybe the pertinent parts of the bonded channel page: 

Channel   Lock Status   Modulation    Channel ID    Freq.    Pwr    SNR   corrected   uncorrected

1                 Locked             QAM256            41               669.0   10.1      41.7        1                          0

2                Not Locked       Unknown          13              495.0   -37.6      0          0                          0

3               Not Locked        Unkown           14                507       -23.1     0           0                          0          

4                 Locked              QAM256          15                513.0   -16.1      27.1   28897827      91908

 

Warnings I've had today: 

 

Warning (5) REG RSP MP Mismatch between calculated value for P1.6hi compared to CCAP Provided Value... 

Warning (5) RNG-RSP CCAP COmmanded Power exceeds value corresponding to the top of the DRW.... 

Warning (5) Dynamic Range Window Violation...

 

EG

Expert

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87K Messages

5 m ago

Can't see your pics. Since you are a new poster, they need to be approved by a Forum Admin. That could take some time. In the interim, you could try hosting them at one of those free third-party pic hosting sites like Imgur or Photobucket and post the link to them here.


Or copy all of the text of the status page and paste it into the body of your next post here.

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I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!tick

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9 Messages

5 m ago

Upstreams: 

 

 Channel

Lock Status

Channel Type

Channel ID

Symb. Rate (Ksym/sec)

Freq. (MHz)

Pwr (dBmV)

   1

Locked

SC-QAM

1

5120

16.4

39.0

   2

Locked

SC-QAM

2

5120

22.8

39.0

   3

Locked

SC-QAM

3

5120

29.2

39.5

   4

Locked

SC-QAM

4

5120

35.6

41.0

   5

Locked

SC-QAM

5

2560

40.4

40.0

Frequent Visitor

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9 Messages

5 m ago

here are the downloads, working on uploads now: 

 

Channel

Lock Status

Modulation

Channel ID

Freq.

PWR

SNR

Corrected

Uncorrected

1

Locked

QAM256

41

669

10.1

41.7

1

0

2

Not Locked

Unknown

13

495.0

-37.6

0

0

0

3

Not Locked

Unkown

14

507

-23.1

0

0

0

4

Locked

QAM256

15

513.0

-16.1

27.1

28897827

91908

5

Locked

QAM256

16

519.0

-9.0

33.3

5

0

6

Locked

QAM256

17

525

-3.3

37.6

0

0

7

Locked

QAM256

18

531

0.9

39.8

0

0

8

Locked

QAM256

19

537

3.1

40.5

0

0

9

Locked

QAM256

20

543

4.4

40.9

0

0

10

Locked

QAM256 

21

549

5.4

41.1

0

0

11

Locked

QAM256 

22

555.0

5.8

41.2

0

0

12

Locked

QAM256 

23

561.0

6.6

41.3

0

0

13

Locked

QAM256 

24

567

6.7

41.4

0

0

14

Locked

QAM256 

25

573

6.7

41.3

0

0

15

Locked

QAM256 

26

579

7.5

41.6

0

0

16

Locked

QAM256 

27

585

7.8

41.6

0

0

17

Locked

QAM256 

28

591

8.3

41.6

0

0

18

Locked

QAM256 

29

597

8.3

41.7

0

0

19

Locked

QAM256 

30

603

8.6

41.7

0

0

20

Locked

QAM256 

31

609

8.6

41.6

0

0

21

Locked

QAM256 

32

615

8.6

41.6

0

0

22

Locked

QAM256 

33

621

8.4

41.5

0

0

23

Locked

QAM256 

34

627

7.3

41.3

0

0

24

Locked

QAM256 

35

633

7

41.1

0

0

25

Locked

QAM256 

36

639

7.2

40.9

0

0

26

Locked

QAM256

37

645

8.1

41.2

0

0

27

Locked

QAM256

38

651

8.7

41.3

0

0

28

Locked

QAM256

39

657

9.3

41.3

0

0

29

Locked

QAM256

40

663

10.2

41.5

0

0

30

Locked

QAM256

42

675

10.2

40.9

1

0

31

Locked

QAM256

43

681

10

41.5

0

0

32

Locked

QAM256

44

687

9.5

41.3

0

0

33

Locked

OFDM PLC

159

722

12.5

41.6

0

0

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9 Messages

5 m ago

Oh goodness, I just realized this copies and pastes straight out of my modem info. I just manually typed the above haha. thanks for your help. Here's an update for Downstreams if needed an hourish past the last one: 

 

ChannelLock StatusModulationChannel IDFreq. (MHz)Pwr (dBmV)SNR (dB)CorrectedUncorrected
   1LockedQAM25641669.010.141.310
   2Not LockedUnknown13495.0-37.70.000
   3Not LockedUnknown14507.0-23.20.000
   4LockedQAM25615513.0-16.227.049503296145517
   5LockedQAM25616519.0-9.033.350
   6LockedQAM25617525.0-3.437.500
   7LockedQAM25618531.00.839.710
   8LockedQAM25619537.03.040.400
   9LockedQAM25620543.04.340.800
   10LockedQAM25621549.05.341.000
   11LockedQAM25622555.05.741.200
   12LockedQAM25623561.06.541.200
   13LockedQAM25624567.06.641.400
   14LockedQAM25625573.06.641.310
   15LockedQAM25626579.07.441.600
   16LockedQAM25627585.07.841.410
   17LockedQAM25628591.08.241.700
   18LockedQAM25629597.08.341.500
   19LockedQAM25630603.08.641.600
   20LockedQAM25631609.08.641.600
   21LockedQAM25632615.08.641.600
   22LockedQAM25633621.08.441.400
   23LockedQAM25634627.07.341.210
   24LockedQAM25635633.06.941.000
   25LockedQAM25636639.07.240.910
   26LockedQAM25637645.08.141.210
   27LockedQAM25638651.08.741.300
   28LockedQAM25639657.09.341.430
   29LockedQAM25640663.010.241.510
   30LockedQAM25642675.010.241.210
   31LockedQAM25643681.010.141.510
   32LockedQAM25644687.09.641.500
   33LockedOFDM PLC159722.012.341.600
EG

Expert

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87K Messages

5 m ago

Please post the downstream channels in their entirety. Also post the upstream channel values.

 

I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!tick

Frequent Visitor

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9 Messages

5 m ago

Thanks for the help, appreciate your time

EG

Expert

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87K Messages

5 m ago

Good luck with it ! Please post back with how things turn out.

I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!tick

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