I have a CM1000 and have a 800/20 plan. Yesterday I installed GoCoax MoCA 2.5 adapters to my network so I can utilize 3 unused coax cable jacks in a few rooms of the house to provide ethernet-like connections to serve as a wired backhaul for my Orbi mesh network satellites.
Internet seems to be working fine - haven't experienced drops or connectivity issues yet. Direct connection to the GoCoax adapters using an ethernet cable plugged to a laptop gets me anywhere from 850-910 Mbps which is great.
My question is around my cable modem stats (taken as of 15 min ago of this post):
| <tabindex=-1>Startup Procedure</tabindex=-1> |
| Procedure |
Status |
Comment |
| Acquire Downstream Channel |
393000000 Hz |
Locked |
| Connectivity State |
OK |
Operational |
| Boot State |
OK |
Operational |
| Security |
Enable |
BPI+ |
| IP Provisioning Mode |
Honor MDD |
IPv6 only |
|
|
| <tabindex=-1>Downstream Bonded Channels</tabindex=-1> |
| Channel |
Lock Status |
Modulation |
Channel ID |
Frequency |
Power |
SNR / MER |
Unerrored Codewords |
Correctable Codewords |
Uncorrectable Codewords |
| 1 |
Locked |
QAM256 |
42 |
393000000 Hz |
0.0 dBmV |
41.8 dB |
1475102408 |
0 |
0 |
| 2 |
Locked |
QAM256 |
1 |
417000000 Hz |
0.8 dBmV |
42.0 dB |
1473606263 |
0 |
0 |
| 3 |
Locked |
QAM256 |
2 |
423000000 Hz |
0.5 dBmV |
41.9 dB |
1473611090 |
0 |
0 |
| 4 |
Locked |
QAM256 |
3 |
429000000 Hz |
0.3 dBmV |
42.0 dB |
1473613666 |
0 |
0 |
| 5 |
Locked |
QAM256 |
4 |
435000000 Hz |
0.0 dBmV |
41.7 dB |
1473617085 |
0 |
0 |
| 6 |
Locked |
QAM256 |
5 |
453000000 Hz |
-0.5 dBmV |
41.5 dB |
1473620592 |
0 |
0 |
| 7 |
Locked |
QAM256 |
6 |
459000000 Hz |
-0.3 dBmV |
41.4 dB |
1473624569 |
0 |
0 |
| 8 |
Locked |
QAM256 |
7 |
465000000 Hz |
0.0 dBmV |
41.7 dB |
1473627728 |
0 |
0 |
| 9 |
Locked |
QAM256 |
8 |
471000000 Hz |
0.1 dBmV |
41.6 dB |
1473634047 |
0 |
0 |
| 10 |
Locked |
QAM256 |
9 |
477000000 Hz |
0.2 dBmV |
41.6 dB |
1473637621 |
0 |
0 |
| 11 |
Locked |
QAM256 |
10 |
483000000 Hz |
0.0 dBmV |
41.7 dB |
1473640754 |
0 |
0 |
| 12 |
Locked |
QAM256 |
11 |
489000000 Hz |
0.3 dBmV |
41.8 dB |
1473644778 |
0 |
0 |
| 13 |
Locked |
QAM256 |
12 |
495000000 Hz |
0.2 dBmV |
41.6 dB |
1473648593 |
0 |
0 |
| 14 |
Locked |
QAM256 |
13 |
507000000 Hz |
0.9 dBmV |
41.8 dB |
1473652594 |
0 |
0 |
| 15 |
Locked |
QAM256 |
14 |
513000000 Hz |
1.3 dBmV |
42.0 dB |
1473655647 |
0 |
0 |
| 16 |
Locked |
QAM256 |
15 |
519000000 Hz |
1.4 dBmV |
42.0 dB |
1473659998 |
0 |
0 |
| 17 |
Locked |
QAM256 |
16 |
525000000 Hz |
1.9 dBmV |
42.1 dB |
1473669272 |
0 |
0 |
| 18 |
Locked |
QAM256 |
17 |
531000000 Hz |
1.7 dBmV |
42.0 dB |
1473672234 |
0 |
0 |
| 19 |
Locked |
QAM256 |
18 |
537000000 Hz |
1.7 dBmV |
41.8 dB |
1473677143 |
0 |
0 |
| 20 |
Locked |
QAM256 |
19 |
543000000 Hz |
1.4 dBmV |
41.9 dB |
1473680050 |
0 |
0 |
| 21 |
Locked |
QAM256 |
20 |
549000000 Hz |
0.9 dBmV |
41.8 dB |
1473684154 |
0 |
0 |
| 22 |
Locked |
QAM256 |
21 |
555000000 Hz |
1.4 dBmV |
41.9 dB |
1473688218 |
0 |
0 |
| 23 |
Locked |
QAM256 |
22 |
561000000 Hz |
1.4 dBmV |
41.7 dB |
1473691734 |
0 |
0 |
| 24 |
Locked |
QAM256 |
23 |
567000000 Hz |
1.9 dBmV |
42.0 dB |
1473695680 |
0 |
0 |
| 25 |
Locked |
QAM256 |
24 |
573000000 Hz |
2.1 dBmV |
41.9 dB |
1473698932 |
0 |
0 |
| 26 |
Locked |
QAM256 |
25 |
579000000 Hz |
2.1 dBmV |
42.1 dB |
1473703202 |
0 |
0 |
| 27 |
Locked |
QAM256 |
26 |
585000000 Hz |
2.1 dBmV |
42.0 dB |
1473701694 |
0 |
0 |
| 28 |
Locked |
QAM256 |
27 |
591000000 Hz |
1.7 dBmV |
42.0 dB |
1473703580 |
0 |
0 |
| 29 |
Locked |
QAM256 |
43 |
399000000 Hz |
0.2 dBmV |
42.0 dB |
1473675582 |
0 |
0 |
| 30 |
Locked |
QAM256 |
44 |
405000000 Hz |
0.4 dBmV |
42.0 dB |
1473678028 |
0 |
0 |
| 31 |
Locked |
QAM256 |
45 |
411000000 Hz |
0.5 dBmV |
42.0 dB |
1473680269 |
0 |
0 |
| 32 |
Not Locked |
Unknown |
0 |
0 Hz |
0.0 dBmV |
0.0 dB |
0 |
0 |
0 |
|
|
| <tabindex=-1>Upstream Bonded Channels</tabindex=-1> |
| Channel |
Lock Status |
Modulation |
Channel ID |
Frequency |
Power |
| 1 |
Locked |
ATDMA |
1 |
35600000 Hz |
50.5 dBmV |
| 2 |
Locked |
ATDMA |
2 |
29200000 Hz |
51.3 dBmV |
| 3 |
Locked |
ATDMA |
3 |
22800000 Hz |
50.8 dBmV |
| 4 |
Locked |
ATDMA |
4 |
16400000 Hz |
50.8 dBmV |
| 5 |
Locked |
ATDMA |
5 |
39600000 Hz |
50.0 dBmV |
| 6 |
Not Locked |
Unknown |
0 |
0 Hz |
0.0 dBmV |
| 7 |
Not Locked |
Unknown |
0 |
0 Hz |
0.0 dBmV |
| 8 |
Not Locked |
Unknown |
0 |
0 Hz |
0.0 dBmV |
|
|
| <tabindex=-1>Downstream OFDM Channels</tabindex=-1> |
| Channel |
Lock Status |
Modulation / Profile ID |
Channel ID |
Frequency |
Power |
SNR / MER |
Active Subcarrier Number Range |
Unerrored Codewords |
Correctable Codewords |
Uncorrectable Codewords |
| 1 |
Locked |
0, 1, 2, 3 |
41 |
690000000 Hz |
3.5 dBmV |
40.3 dB |
1108 ~ 2987 |
164388230 |
152837042 |
0 |
| 2 |
Not Locked |
0 |
0 |
0 Hz |
-1.8 dBmV |
0.0 dB |
0 ~ 4095 |
0 |
0 |
0 |
|
|
| <tabindex=-1>Upstream OFDMA Channels</tabindex=-1> |
| Channel |
Lock Status |
Modulation / Profile ID |
Channel ID |
Frequency |
Power |
| 1 |
Not Locked |
Unknown |
0 |
0 Hz |
0 dBmV |
| 2 |
Not Locked |
Unknown |
0 |
0 Hz |
0 dBmV |
|
From what I've read and understand, my downstream signals look good as far as power and SNR levels. However, my upstream power looks pretty high hovering around 50-51 dbmV. Like I said, currently not experiencing any Internet problems or connectivity issues at the moment but I know that upstream power range is almost to the max accepted or tolerance limit without any buffer.
Before my MoCA install, I did not have any splitters on my coax. I remember having a higher downstream power, so I added an attenuator which knocked down the power by -6 dbmV to get it close to 0-2 dbmV for each locked channel. Downstream SNRs were roughly similar as above ranging between 40-42 db. My upstream power was about 48-49 dbmV across the locked channels.
After installing MoCA, I needed to add 2 splitters in the mix for the adapters to work. The first splitter is a 3-way is connected to the cable coming into the house, with the lowest db loss terminal out connected to the coax running to my upstairs office jack. From my office jack, another short coax cable is connected to a 2-way splitter (-4.5db loss to each output terminal) where one terminal is connected to my cable modem and the other terminal is connected to the MoCA coax terminal of the GoCoax adapter. I removed the attenuator that I had installed on the cable modem before MoCA. The stats you see above is with this current setup that I have now as I'm typing this post.
I know adding splitters along the way increases upstream power levels, but I don't think I can get around this, so a few questions:
- Is there any way of lowering the upstream power level effectively?
- Would getting 2-way splitters that are -3.5 db loss vs the 4.5 I have now, though I'm not sure if that helps with the upstream levels?
- Is this truly something an Xfinity tech needs to assist with?
Thanks everyone in advance.
No Responses!