Community Forum

Intermittent disconnections. "Commanded Power Exceeds Value Corresponding to the Top of the DRW;"

Highlighted
Frequent Visitor

Intermittent disconnections. "Commanded Power Exceeds Value Corresponding to the Top of the DRW;"

We just moved into a new house and once the service was transferred and our equipment was hooked up, we started getting disconnected every 20ish Minutes for a few seconds. Long enough to have streaming videos buffer and to be disconnected from games.  Upon inspection we found that the Cable box had a 5-way splitter and a inline coupler with grounding wire. 

I did not need or want this spiderweb of cables on the back of my house, so we called to have a tech sent out. The tech, Just tightened the connections, and once the Modem showed connected. he left. 
We were charged for this visit.  


Since then we continued to have connection issues.  In order to have an uninterrupted connection for longer than an hour or so, I have to manually reset the modem so that the Upload power is within limits. 

 

I have my suspicious of what the issue is.  I believe the CMTS is telling my modem to transmit at a much higher power level than is stable because of EITHER bad cable from the street or old or damaged/worn out splitters or cables on the back of the house. 

 

I have done everything I am capable of doing to reduce the noise on the line. I disconnected ALL the other lines coming into the house and the splitter, The only thing that is still connected is the inline coupler w/ground wire mostly because I can't get the cable from the pole to reach the hole into the room where we have the modem. 

 

This issue did not present at our previous house, Which was only a few blocks away.  After moving I even upgraded my Modem to an SB8200 just to rule out my equipment. 

 

I have the Event logs from my SB8200


10/13/2019 18:26 2436694061 5 "Dynamic Range Window violation"
10/13/2019 18:26 82001200 5 "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the 
10/13/2019 18:26 2436694061 5 "Dynamic Range Window violation"
10/13/2019 18:26 82001200 5 "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the 
10/13/2019 18:26 2436694061 5 "Dynamic Range Window violation"
10/13/2019 18:26 82001200 5 "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;
10/13/2019 18:26 2436694061 5 "Dynamic Range Window violation"
10/13/2019 18:26 82001200 5 "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;
10/13/2019 18:22 2436694061 5 "Dynamic Range Window violation"
10/13/2019 18:22 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;
10/13/2019 18:04 2436694061 5 "Dynamic Range Window violation"
10/13/2019 18:04 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;
10/13/2019 17:57 2436694061 5 "Dynamic Range Window violation"
10/13/2019 17:57 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;
10/13/2019 17:44 2436694061 5 "Dynamic Range Window violation"
10/13/2019 17:44 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;
10/13/2019 17:44 2436694061 5 "Dynamic Range Window violation"
10/13/2019 17:44 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;
10/13/2019 17:30 2436694061 5 "Dynamic Range Window violation"
10/13/2019 17:30 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;
10/13/2019 17:23 2436694061 5 "Dynamic Range Window violation"
10/13/2019 17:23 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;
10/13/2019 17:22 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;
10/13/2019 17:11 2436694061 5 "Dynamic Range Window violation"
10/13/2019 17:11 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;
10/13/2019 17:07 2436694061 5 "Dynamic Range Window violation"
10/13/2019 17:07 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;
10/13/2019 17:06 2436694061 5 "Dynamic Range Window violation"
10/13/2019 17:06 82001200 5 "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;
10/13/2019 17:06 2436694061 5 "Dynamic Range Window violation"
10/13/2019 17:06 82001200 5 "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;
10/13/2019 17:06 2436694061 5 "Dynamic Range Window violation"
10/13/2019 17:06 82001200 5 "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;
10/13/2019 17:06 2436694061 5 "Dynamic Range Window violation"
10/13/2019 17:06 82001200 5 "RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;
10/13/2019 15:05 2436694061 5 "Dynamic Range Window violation"
10/13/2019 15:05 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;
10/13/2019 14:57 2436694061 5 "Dynamic Range Window violation"
10/13/2019 14:57 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;
10/13/2019 14:57 2436694061 5 "Dynamic Range Window violation"
10/13/2019 14:57 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;

I removed my MAC address from the logs.

 

I need to call and have another tech come out, 1. to clean all of this cable off the house.  and 2. to check the noise levels at each junction from the box on the back to the pole.  What should I say to the level 1 tech on the phone to make sure this happens?  Is there a way to escalate an issue beyond the "Turn it off and on" conversation? I also would like to NOT pay for the next truck roll as i believe this is a problem with the lines and not with my equipment.  

Highlighted
Diamond Problem Solver

Re: Intermittent disconnections. "Commanded Power Exceeds Value Corresponding to the Top of the

What are the signal levels that you’re modem is reading?

I am a Retired Official Comcast Employee
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark a post as the Best Answer!
Highlighted
Frequent Visitor

Re: Intermittent disconnections. "Commanded Power Exceeds Value Corresponding to the Top of the

These are the readings with time stamp at the bottom

Downstream Bonded Channels
Channel ID Lock Status Modulation Frequency Power SNR/MER Corrected Uncorrectables
33 Locked QAM256 651000000 Hz 6.2 dBmV 41.5 dB 365 389
5 Locked QAM256 483000000 Hz 5.4 dBmV 41.7 dB 537 666
6 Locked QAM256 489000000 Hz 4.8 dBmV 41.7 dB 459 678
7 Locked QAM256 495000000 Hz 4.8 dBmV 42.0 dB 617 567
8 Locked QAM256 501000000 Hz 5.1 dBmV 42.0 dB 422 599
9 Locked QAM256 507000000 Hz 4.9 dBmV 41.7 dB 439 598
10 Locked QAM256 513000000 Hz 4.6 dBmV 41.6 dB 526 601
11 Locked QAM256 519000000 Hz 5.2 dBmV 41.7 dB 492 493
12 Locked QAM256 525000000 Hz 5.6 dBmV 41.8 dB 461 460
13 Locked QAM256 531000000 Hz 5.5 dBmV 41.6 dB 421 487
14 Locked QAM256 537000000 Hz 5.2 dBmV 41.7 dB 431 538
15 Locked QAM256 543000000 Hz 5.5 dBmV 41.7 dB 485 418
16 Locked QAM256 549000000 Hz 5.9 dBmV 41.7 dB 446 434
17 Locked QAM256 555000000 Hz 6.1 dBmV 41.8 dB 385 457
18 Locked QAM256 561000000 Hz 6.0 dBmV 41.8 dB 435 436
19 Locked QAM256 567000000 Hz 6.2 dBmV 41.8 dB 361 496
20 Locked QAM256 573000000 Hz 6.4 dBmV 41.7 dB 435 416
21 Locked QAM256 579000000 Hz 6.4 dBmV 41.7 dB 389 447
22 Locked QAM256 585000000 Hz 6.4 dBmV 41.7 dB 345 437
23 Locked QAM256 591000000 Hz 6.3 dBmV 41.7 dB 384 464
24 Locked QAM256 597000000 Hz 6.3 dBmV 41.5 dB 461 388
25 Locked QAM256 603000000 Hz 6.5 dBmV 41.7 dB 413 421
26 Locked QAM256 609000000 Hz 6.5 dBmV 41.7 dB 445 432
27 Locked QAM256 615000000 Hz 6.4 dBmV 41.6 dB 317 452
28 Locked QAM256 621000000 Hz 6.4 dBmV 40.8 dB 379 434
29 Locked QAM256 627000000 Hz 6.4 dBmV 40.0 dB 440 378
30 Locked QAM256 633000000 Hz 6.5 dBmV 41.6 dB 393 393
31 Locked QAM256 639000000 Hz 6.1 dBmV 41.5 dB 409 338
32 Locked QAM256 645000000 Hz 6.0 dBmV 41.4 dB 345 405
34 Locked QAM256 657000000 Hz 6.2 dBmV 41.4 dB 393 295
35 Locked QAM256 663000000 Hz 5.9 dBmV 41.4 dB 363 351
36 Locked QAM256 669000000 Hz 5.9 dBmV 41.4 dB 347 330
159 Locked Other 690000000 Hz 6.9 dBmV 40.8 dB 1664416077 0



 
Upstream Bonded Channels
Channel Channel ID Lock Status US Channel Type Frequency Width Power
1 1 Locked SC-QAM Upstream 35800000 Hz 6400000 Hz 43.0 dBmV
2 2 Locked SC-QAM Upstream 29400000 Hz 6400000 Hz 42.0 dBmV
3 3 Locked SC-QAM Upstream 23000000 Hz 6400000 Hz 41.0 dBmV
4 4 Locked SC-QAM Upstream 16600000 Hz 6400000 Hz 43.0 dBmV



 

Current System Time: Sun Oct 13 20:07:14 2019

Highlighted
Frequent Visitor

Re: Intermittent disconnections. "Commanded Power Exceeds Value Corresponding to the Top of the

10+ days and no response.  

Highlighted
Contributor

Re: Intermittent disconnections. "Commanded Power Exceeds Value Corresponding to the Top of the

your downstream signal levlels look ok https://arris.secure.force.com/consumers/articles/General_FAQs/SB8200-Cable-Signal-Levels/

 

you upstream are lower than in the article (mine are lower still at 38dBmV or more)

 

i don't seem to be getting more than one error like yours (i just changed powered splitter and was trying to figure out if all was ok or not and saw the window range error on mine)

 

that said my connection seems ok, i have no idea what your issues is, but good luck!

Highlighted
Expert

Re: Intermittent disconnections. "Commanded Power Exceeds Value Corresponding to the Top of the


@Scyto wrote:

your downstream signal levlels look

 

ok https://arris.secure.force.com/consumers/articles/General_FAQs/SB8200-Cable-Signal-Levels/

 

 

 

FWIW, don't ever go by that manufacturer spec. Only the Comcast plant / engineering specs matter.

 

Downstream Power Levels: -8dBmV to  +10dBmV

Downstream Signal to Noise Ratio (SNR):  >35dB 

Upstream Power Level:  +25dBmV to +54dBmV

Upstream Signal to Noise Ratio (uSNR): >31dB  

Upstream Receive Power: -2dBmV to +2dBmV


3 month old dead thread now being closed.



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!