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Help with MoCA setup understanding

hb3593
I plan to stick around

Hello All,

 

I apologize in advance if this has been answered before (I have gone through a ton of posts here and other forums) but had questions that I'd be grateful if answered for complete understanding.


I just moved to a townhouse and unfortunately the previous owners cut most of the co-ax cables leaving me with only 2 available ports (1 in the basement (next to the garage which is the PoE for the ISP), and 1 on the second floor room.

 

I am looking to have the XB7 in the basement and have a router in the room to have better Wi-Fi on the top floor.

 

Current scenario:

Garage: incoming line --> 2 way splitter (1 to basement, 1 to bedroom [currently disconnected])

Basement: coax --> XB7 (bridge mode) -- 2 x ethernet from XB7 -- Wi-Fi AP & work station

 

Required scenario:

Incoming line --> PoE filter ? --> MoCA compatible splitter -->

Basement: coax --> XB7 (MoCA enable) -- ethernet -- work station

Bedroom: coax --> MoCA adapter (ECB7250S02 or MA2500D) --> ethernet --> Wi-Fi AP

 

Questions:

  1. Will the above work or do I need 2 MoCA adapters?
  2. Is 1 PoE filter enough?
  3. Do I need an Amplifier in the garage? If so, please recommend an amp (I can get one from US also)

**Labels Added**

 

22 REPLIES 22

Re: Help with MoCA setup understanding

hb3593
I plan to stick around

Here's the data. Took me a while to figure out but on a Mac, you need to hold command key also along with shift to properly copy.

 

I'll work this weekend to rejig the entire network. It takes a while to get everything back online but changing everything might be a good start as well. I'll keep looking for the same MoCA adapter and add that if Rogers isn't able to help figure the settings stuff out.

 

Do you know if the XB8 has any improvement on the XB7 or is it even more locked out?

IndexLock StatusFrequencySNRPower LevelModulation

Downstream
Channel Bonding Value
16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
Locked
651 MHz
279 MHz
849 MHz
855 MHz
861 MHz
579 MHz
585 MHz
591 MHz
597 MHz
603 MHz
609 MHz
615 MHz
621 MHz
633 MHz
639 MHz
645 MHz
657 MHz
663 MHz
669 MHz
675 MHz
681 MHz
687 MHz
693 MHz
699 MHz
705 MHz
711 MHz
717 MHz
723 MHz
825 MHz
831 MHz
837 MHz
843 MHz
350000000
41.3 dB
41.7 dB
42.9 dB
43.1 dB
42.8 dB
41.4 dB
41.8 dB
42.2 dB
41.9 dB
41.7 dB
41.6 dB
41.2 dB
41.5 dB
42.1 dB
41.7 dB
41.4 dB
41.3 dB
41.4 dB
41.8 dB
41.5 dB
42.1 dB
41.9 dB
41.9 dB
41.9 dB
42.1 dB
42.5 dB
42.7 dB
42.6 dB
43.0 dB
42.9 dB
42.7 dB
42.6 dB
41.1 dB
-1.4 dBmV
-2.2 dBmV
1.3 dBmV
1.5 dBmV
1.3 dBmV
-2.4 dBmV
-1.9 dBmV
-1.3 dBmV
-1.5 dBmV
-1.7 dBmV
-2.0 dBmV
-1.9 dBmV
-1.7 dBmV
0.9 dBmV
-1.0 dBmV
-1.2 dBmV
-1.5 dBmV
-1.1 dBmV
0.6 dBmV
0.5 dBmV
0.5 dBmV
0.4 dBmV
0.6 dBmV
0.6 dBmV
0.2 dBmV
0.1 dBmV
0.2 dBmV
0.0 dBmV
1.0 dBmV
1.0 dBmV
0.8 dBmV
0.7 dBmV
-1.5 dBmV
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
256 QAM
OFDM

IndexLock StatusFrequencySymbol RatePower LevelModulationChannel Type

Upstream
Channel Bonding Value
1
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Locked
Locked
Locked
Locked
21 MHz
25 MHz
32 MHz
38 MHz
2560
5120
5120
5120
44.0 dBmV
44.3 dBmV
45.5 dBmV
45.5 dBmV
QAM
QAM
QAM
QAM
TDMA_AND_ATDMA
ATDMA
ATDMA
ATDMA

IndexUnerrored CodewordsCorrectable CodewordsUncorrectable Codewords

CM Error Codewords
1
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3238043779
1993256470
1993278455
1993275064
1993285591
1993297498
1993303314
1993317677
1993332605
1993345663
1993347144
1993347600
1993347753
1993343829
1993357951
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1993389208
1993383746
1993390863
1993410723
1993413348
1993421099
1993382202
1993373832
1993365105
1993414479
1993449465
1993435374
1993454267
1993459968
1993484948
3238043779
2646800191
67
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
14860
22661
28214
6771
0
418
0
0
0
2646800191
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
16930
30678
39024
12515
0
508
0
0
0
0

Re: Help with MoCA setup understanding

Ok, adding another 2 port MoCA splitter at the modems location will drop the OFDM signal range down to -5 to -6 dBmV. Thats the very bottom of the range that I would like to see.  Ideally you would be at a higher signal range to start with, but, it is what it is.  You have room on the upstream side for the signal levels to rise, so, that shouldn't be an issue.  My main concern at this point is the Downstream signal levels.  

 

So, at this point, its a try it and see.  You could simply buy or order the 2 port MoCA splitter, install that and not worry about the MoCA adapter side of the splitter for now.  The question at hand is whether or not the modem will have problems with the additional 3.5 dB drop in signal levels reaching the modem?  Ideally the open side of the splitter would have a 75 ohm terminator installed to prevent any signal reflection, or, a connection to some 75 ohm input to a device that happens to be turned off.  I wouldn't sweat the small stuff for now.  

 

I don't think you have to change anything at this point, in terms of the physical configuration, other than adding the 2 port splitter as an experiment.  One thing to consider is that it will drop the MoCA signal levels as well, so that might result in slower data rates over the MoCA network.  That's another experimental issue to be determined.  

 

I don't know if the XB8 has a MoCA Privacy code entry window, or, if Comcast has simply used the same user interface.  I'll have to look around to see what I can find.  

 

Just to note, you have some amount of uncorrectable errors in the 700 to 717 Mhz range.  I'm wondering if thats due to cell phone signal ingress somewhere in the system?  Don't know, just wondering at this point.  The amount of uncorrectable codewords is small compared to the total number of codewords in that same range, so, I'm not really concerned with them at this point. 

 

Food for thought, I'll have to read thru the entire thread, I'm wondering what cable you have that runs to the modem from the outside cable duct?  And by that I mean is it RG-59 or RG-6.  It should be RG-6 which is a larger cable with lower losses at higher frequencies.  I might ask you to check the cable jacket for the manufacturers data.  That would show what type of cable it is.  If its old RG-59, it should be replaced with RG-6, which would hopefully bring up all of your downstream signal levels.  That would help to counteract the addition of the 2 port MoCA splitter just ahead of the modem.  

 

Just to confirm, you should have the following configuration for your cabling:

 

Inbound ->  MoCA  ->  MoCA  ->  cable  ->  Modem  -> ethernet  ->  devices 

Rogers         Point of      Splitter  ->  cable    ->  MoCA Adapter upstairs  ->  router  ->  devices

Cable            Entry                        ->  cable   ->  MoCA Adapter   -> devices

                       Filter                        ->  cable  ->  MoCA Adapter  -> devices

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