Last week I posted that my signal had taken a dump after the speed upgrades had rolled through here: »
[Connectivity] No Love after speed updates... lost profile..
My Motorola was reporting downstream channel id 6 (591 MHz) Power as -15db with uncorrectable word errors off the charts. It normally hovers around 0/+1 db. I was on the ultra tier and thought maybe something had gone wrong and the wrong profiles had been pushed, etc, etc.
I finally ended up "side-grading" to Blast to force a new config to be pushed to my modem. Same results. 591 Mhz download was unhappy on my 6120.
You can see here how choppy my connection got during this time:
»
64.81.79.40/r3/cricket/grapher?t···ange=d:w![]()
At this point I thought - either a bad modem or a bad channel. So I purchased a Zoom 5341J and called Comcast to have them replace my Motorola with the Zoom. After the modem was provisioned and config pushed I went outside and connected the modem and here are the results:
I have just one splitter between the data modem (Zoom) and my voice modem (Arris)
Outside the house Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 8 603000000 Hz 5.5 dBmV 41.9 dBmV 0 0
2 Locked unknown 1 561000000 Hz -48.6 dBmV 0.0 dBmV 0 0
3 Locked unknown 2 567000000 Hz -48.5 dBmV 0.0 dBmV 0 0
4 Locked unknown 3 573000000 Hz -48.4 dBmV 0.0 dBmV 0 0
5 Locked unknown 4 579000000 Hz -35.4 dBmV 0.0 dBmV 0 0
6 Locked unknown 5 585000000 Hz -20.3 dBmV 0.0 dBmV 0 0
7 Locked QAM256 6 591000000 Hz -5.3 dBmV 33.4 dBmV 774 08 Locked QAM256 7 597000000 Hz 2.7 dBmV 40.2 dBmV 0 0
Total Correctables Total Uncorrectables
774 0
Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 6 5120 Ksym/sec 37000000 Hz 45.0 dBmV
2 Locked TDMA and ATDMA 4 2560 Ksym/sec 25300000 Hz 43.5 dBmV
3 Locked ATDMA 5 5120 Ksym/sec 30600000 Hz 43.5 dBmV
4 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
Inside the house:Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 8 603000000 Hz -3.2 dBmV 40.9 dBmV 0 0
2 Locked unknown 1 561000000 Hz -56.5 dBmV 0.0 dBmV 0 0
3 Locked unknown 2 567000000 Hz -56.4 dBmV 0.0 dBmV 0 0
4 Locked unknown 3 573000000 Hz -56.4 dBmV 0.0 dBmV 0 0
5 Locked unknown 4 579000000 Hz -43.5 dBmV 0.0 dBmV 0 0
6 Locked unknown 5 585000000 Hz -29.1 dBmV 0.0 dBmV 0 0
7 Locked QAM256 6 591000000 Hz -14.2 dBmV 32.9 dBmV 96 08 Locked QAM256 7 597000000 Hz -5.9 dBmV 39.4 dBmV 0 0
Total Correctables Total Uncorrectables
96 0
Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 5 5120 Ksym/sec 30600000 Hz 48.0 dBmV
2 Locked TDMA and ATDMA 4 2560 Ksym/sec 25300000 Hz 47.8 dBmV
3 Locked ATDMA 6 5120 Ksym/sec 37000000 Hz 49.3 dBmV
4 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
Also the Zoom DS light is flashing Blue which according to the docs mean it is still trying to synch the downstream channel.
Now the connection is "stable" in that I am seeing 50/10.
What the heck is going on here?
Nothing has changed in my wiring, the Motorola has be solid for over a year - no issues whatsoever. The only thing that has "changed" was the new speeds. Very weird.
Is this noise, unbalanced connection, bad wiring, or nothing at all?
Dan
