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High upstream power, high uncorrectables count, Dynamic Range Window Violation errors - Arris SB8200

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High upstream power, high uncorrectables count, Dynamic Range Window Violation errors - Arris SB8200

Hello, All.

 

We've lived in our house over 3 years now, and our Comcast signal has always been marginal.

 

We've had a Comcast tech replace the aging RG59 run out to the tap on the street with quad-shield RG6.

 

There's one splitter (Extreme Networks BDS102H supplied by Comcast) at the MPOE; one leg runs 65' to the cable modem with a single quad-shield RG6 cable with compression fittings. The other leg runs 65' feet over a second quad-shield RG6 cable with compression fittings to a second BDS102H splitter, and from there two short quad-shield RG6 runs to two, SiliconDust HDHomeRun tuner boxes.

 

The plant inside the house is as good as it's going to get, I think.

 

The cable modem is an Arris SB8200, software version AB01.01.009.32.01_122319_183.0A.NSH

 

The upstream power is right at the limit, around 49-50 dBmV.

 

Upstream Bonded Channels          
Channel Channel ID Lock Status US Channel Type Frequency Width Power
1 2 Locked SC-QAM Upstream 23700000 Hz 6400000 Hz 50.0 dBmV
2 1 Locked SC-QAM Upstream 17300000 Hz 6400000 Hz 50.0 dBmV
3 3 Locked SC-QAM Upstream 30300000 Hz 6400000 Hz 50.0 dBmV
4 4 Locked SC-QAM Upstream 36700000 Hz 6400000 Hz

50.0 dBmV

 

 

I get a lot of uncorrectable errors across all channels, sometimes tens of thousands a day.

Downstream Bonded Channels          
Channel ID Lock Status Modulation Frequency Power SNR/MER Corrected Uncorrectables
20 Locked QAM256 525000000 Hz 4.2 dBmV 40.4 dB 44178 50308
8 Locked QAM256 447000000 Hz 3.9 dBmV 40.4 dB 44001 49996
9 Locked QAM256 453000000 Hz 4.0 dBmV 40.5 dB 58415 86143
10 Locked QAM256 459000000 Hz 4.0 dBmV 40.2 dB 58247 83979
11 Locked QAM256 465000000 Hz 3.9 dBmV 40.1 dB 60659 87277
12 Locked QAM256 471000000 Hz 3.8 dBmV 40.1 dB 61825 87915
13 Locked QAM256 477000000 Hz 3.9 dBmV 40.1 dB 63057 89058
14 Locked QAM256 483000000 Hz 3.9 dBmV 40.2 dB 61879 84595
15 Locked QAM256 489000000 Hz 3.9 dBmV 40.2 dB 55211 73511
16 Locked QAM256 495000000 Hz 4.0 dBmV 40.3 dB 66375 81303
17 Locked QAM256 507000000 Hz 4.0 dBmV 40.3 dB 56630 71698
18 Locked QAM256 513000000 Hz 4.1 dBmV 40.4 dB 44013 42104
19 Locked QAM256 519000000 Hz 4.2 dBmV 40.2 dB 52191 64789
21 Locked QAM256 531000000 Hz 4.2 dBmV 40.3 dB 49074 59340
22 Locked QAM256 537000000 Hz 4.1 dBmV 40.3 dB 48264 57337
23 Locked QAM256 543000000 Hz 4.1 dBmV 40.3 dB 48483 55703
24 Locked QAM256 549000000 Hz 4.5 dBmV 40.3 dB 46992 54399
25 Locked QAM256 555000000 Hz 4.7 dBmV 40.3 dB 45988 51566
26 Locked QAM256 561000000 Hz 4.9 dBmV 40.3 dB 32065 42216
27 Locked QAM256 567000000 Hz 5.0 dBmV 40.4 dB 45363 48477
28 Locked QAM256 573000000 Hz 5.1 dBmV 40.3 dB 45008 47182
29 Locked QAM256 579000000 Hz 5.3 dBmV 40.3 dB 45772 45632
30 Locked QAM256 585000000 Hz 5.4 dBmV 40.3 dB 45020 44624
31 Locked QAM256 591000000 Hz 5.5 dBmV 40.2 dB 47937 42829
32 Locked QAM256 597000000 Hz 5.6 dBmV 40.1 dB 46615 43809
33 Locked QAM256 603000000 Hz 5.8 dBmV 40.3 dB 47524 42769
34 Locked QAM256 609000000 Hz 5.8 dBmV 40.3 dB 48649 43558
35 Locked QAM256 615000000 Hz 6.0 dBmV 40.3 dB 48320 43307
36 Locked QAM256 621000000 Hz 6.1 dBmV 40.4 dB 50111 42778
37 Locked QAM256 627000000 Hz 6.1 dBmV 40.0 dB 53393 40526
38 Locked QAM256 633000000 Hz 6.1 dBmV 39.9 dB 54173 38379
48 Locked Other 850000000 Hz 2.5 dBmV 37.2 dB 18013239 3606

 

I was getting T3 errors, and now I'm getting Dynamic Range Winow Violation message, too.

Date Time Event ID Event Level Description
4/25/2020 0:11 74010100 6 "CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/25/2020 0:10 74010100 6 "CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/24/2020 18:31 74010100 6 "CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/24/2020 18:30 74010100 6 "CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/24/2020 11:54 74010100 6 "CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/24/2020 11:53 74010100 6 "CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/23/2020 23:11 74010100 6 "CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/23/2020 23:11 74010100 6 "CM-STATUS message sent. Event Type Code: 22; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/23/2020 23:11 74010100 6 "CM-STATUS message sent. Event Type Code: 23; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/23/2020 23:11 74010100 6 "CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/23/2020 14:32 74010100 6 "CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/23/2020 14:31 74010100 6 "CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/23/2020 10:17 2436694061 5 "Dynamic Range Window violation"
4/23/2020 10:17 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/23/2020 10:17 2436694061 5 "Dynamic Range Window violation"
4/23/2020 10:17 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/23/2020 10:17 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/23/2020 4:06 2436694061 5 "Dynamic Range Window violation"
4/23/2020 4:06 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/23/2020 4:06 2436694061 5 "Dynamic Range Window violation"
4/23/2020 4:06 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/23/2020 4:06 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/23/2020 2:15 2436694061 5 "Dynamic Range Window violation"
4/23/2020 2:15 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/23/2020 2:15 2436694061 5 "Dynamic Range Window violation"
4/23/2020 2:15 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/23/2020 2:15 2436694061 5 "Dynamic Range Window violation"
4/23/2020 2:15 82001100 5 "RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/23/2020 2:15 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/22/2020 23:13 74010100 6 "CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/22/2020 23:13 74010100 6 "CM-STATUS message sent. Event Type Code: 22; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/22/2020 23:13 74010100 6 "CM-STATUS message sent. Event Type Code: 23; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/21/2020 20:39 74010100 6 "CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/21/2020 20:39 74010100 6 "CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/19/2020 23:14 74010100 6 "CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/19/2020 23:14 74010100 6 "CM-STATUS message sent. Event Type Code: 22; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/19/2020 23:14 74010100 6 "CM-STATUS message sent. Event Type Code: 23; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/19/2020 23:14 74010100 6 "CM-STATUS message sent. Event Type Code: 20; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/19/2020 8:34 74010100 6 "CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/19/2020 8:33 74010100 6 "CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/17/2020 17:51 74010100 6 "CM-STATUS message sent. Event Type Code: 24; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/17/2020 17:50 74010100 6 "CM-STATUS message sent. Event Type Code: 16; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/17/2020 10:17 67061600 6 "DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
1/1/1970 0:00 2436694066 6 "Honoring MDD; IP provisioning mode = IPv6"
1/1/1970 0:00 84000100 3 "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
4/14/2020 9:29 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/12/2020 15:58 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/12/2020 3:42 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/6/2020 18:19 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"
4/6/2020 16:26 82000500 3 "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=18:9c:27:xx:xx:xx;CMTS-MAC=00:01:5c:xx:xx:xx;CM-QOS=1.1;CM-VER=3.1;"

 

Can I get a tech out to look at the tap on the street? There's lots of RG59 running into this, and I think there's noise ingress from somebody else.

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Re: High upstream power, high uncorrectables count, Dynamic Range Window Violation errors - Arris SB

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Re: High upstream power, high uncorrectables count, Dynamic Range Window Violation errors - Arris SB

Alright, Comcast has a tech visit scheduled for tomorrow. Let's see if they just think it's the new firmware on the modem, or there's actually a plant issue.

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Frequent Visitor

Re: High upstream power, high uncorrectables count, Dynamic Range Window Violation errors - Arris SB

So, "somebody" didn't have enough ports on the tap for the whole section of the planned community in which we live, and decided that a splitter off the tap to feed my line and my neighbors' line was a good idea.

 

The tech today removed that splitter, and my upstream power is magically better by -3dBmV. No uncorrectables, so far, either.