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Re: Dynamic Range Window, Unicast Maintenance Errors

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New Poster

Re: Dynamic Range Window, Unicast Maintenance Errors

Frequency start Value
This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect.
Starting Frequency
 
Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 585000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Security Enabled BPI+
IP Provisioning Mode Honor MDD honorMdd(4)
 
Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 17 585000000 Hz -6.2 dBmV 43.3 dB 0 0
2 Locked QAM256 2 495000000 Hz -6.9 dBmV 42.5 dB 0 0
3 Locked QAM256 3 501000000 Hz -7 dBmV 42.3 dB 0 0
4 Locked QAM256 4 507000000 Hz -6.9 dBmV 41 dB 0 0
5 Locked QAM256 5 513000000 Hz -6.5 dBmV 42.6 dB 0 0
6 Locked QAM256 6 519000000 Hz -6.7 dBmV 42.5 dB 0 0
7 Locked QAM256 7 525000000 Hz -6.8 dBmV 42.4 dB 0 0
8 Locked QAM256 8 531000000 Hz -6.7 dBmV 42.5 dB 0 0
9 Locked QAM256 9 537000000 Hz -6.7 dBmV 42.6 dB 0 0
10 Locked QAM256 10 543000000 Hz -6.9 dBmV 42.6 dB 0 0
11 Locked QAM256 11 549000000 Hz -6.9 dBmV 42.5 dB 0 0
12 Locked QAM256 12 555000000 Hz -6.7 dBmV 42.5 dB 0 0
13 Locked QAM256 13 561000000 Hz -6.4 dBmV 42.9 dB 0 0
14 Locked QAM256 14 567000000 Hz -6.2 dBmV 43.3 dB 0 0
15 Locked QAM256 15 573000000 Hz -6.2 dBmV 43.3 dB 0 0
16 Locked QAM256 16 579000000 Hz -6.2 dBmV 43.3 dB 0 0
17 Locked QAM256 1 489000000 Hz -7.1 dBmV 42.5 dB 0 0
18 Locked QAM256 18 591000000 Hz -6.1 dBmV 43.9 dB 0 0
19 Locked QAM256 19 597000000 Hz -6.1 dBmV 43.9 dB 0 0
20 Locked QAM256 20 603000000 Hz -6 dBmV 43.9 dB 0 0
21 Locked QAM256 21 609000000 Hz -6 dBmV 43.9 dB 0 0
22 Locked QAM256 22 615000000 Hz -6.2 dBmV 43.8 dB 0 0
23 Locked QAM256 23 621000000 Hz -6.2 dBmV 43.2 dB 0 0
24 Locked QAM256 24 627000000 Hz -6.1 dBmV 43.2 dB 0 0
 
Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 3 5120 Ksym/sec 23000000 Hz 48.3 dBmV
2 Locked ATDMA 2 5120 Ksym/sec 29400000 Hz 49.7 dBmV
3 Locked ATDMA 1 5120 Ksym/sec 35800000 Hz 50.2 dBmV
4 Locked ATDMA 4 5120 Ksym/sec 16600000 Hz 47.2 dBmV
5 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
6 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
7 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
8 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
 
Extended Upstream Transmit Power
Enable Extended Upstream Transmit Power 👈grayed ✔️
 
Current System Time:Mon May 11 10:05:14 2020
System Up Time:01:18:09
 
 
My Starting Frequency is "0"
No Correctibles/Uncorrectibles
 
Time Priority Description
2020-5-11, 08:48:39 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:02:8e:7a:d5:28;CMTS-MAC=00:90:f0:27:00:00;CM-QOS=1.1;CM-VER=3.0;
08:02:8e:7a:d5:28 is my router
00:90:f0:27:00:00 is a Harmonic Video Systems Ltd device (00:09:fo)
 
I was told by Comcast to ignore this event entry though I do not like seeing it in my event log.
 
additionally, Comcast in our area (PCB, Fl) has been laying fiber in our area, has stated they are not touching our cable network... yet... but our internet sessions "freeze" for 1 to 3+ minutes (sometimes unavailable for an hour) multiple times a day. At times I have to reboot the router to get access to the internet. Having a fully automated home (lights, switches, TV, show, security & other appliances) is becoming a pain. 
 
 
 
 
 
 
 
 
 
 
Highlighted
New Poster

Re: Dynamic Range Window, Unicast Maintenance Errors

Forgot the link to the MAC address lookup tool. 
https://aruljohn.com/mac.pl

this can be used to indentify the MAC Address manufacture.

hope this helps. 

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Expert

Re: Dynamic Range Window, Unicast Maintenance Errors

The upstream power is on the high side and it may be intermittently fluctuating even higher to out of spec levels. The downstream power is on the weak / low side as well. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, and latency problems.

In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test

If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.



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