Valued Participant

Re: Intermittent downstream speed issues: Lost MDD Timeout...

 

What did you see that told you I had interference on channels 41, 42 & 43? I want to get TWC out here to run another coax for me. I don't have the tools to put a good connecter on raw coax.

 


@MsRaye wrote:

correct. Also, make sure the connectors on the back side of outlets are tight.

I wanted you to get something on that empty VOIP port as it is a 2 way splitter on the amp input and empty ports are not good.

 




Expert

Re: Intermittent downstream speed issues: Lost MDD Timeout...


@Skydaver1 wrote:

 

What did you see that told you I had interference on channels 41, 42 & 43? I want to get TWC out here to run another coax for me. I don't have the tools to put a good connecter on raw coax.

 


The skip between 
Hz 597000000 Hz 627000000
And the high uncorrecteds point to a bad connection allowing ingress. It could be anywhere between your modem and the fiber to coax converter.
the pole to modem cabling needs to be repaired first.





 

Valued Participant

Re: Intermittent downstream speed issues: Lost MDD Timeout...

Thanks. I'll call them today, and also get to work on the terminators & checking the wall outlets.

Valued Participant

Re: Intermittent downstream speed issues: Lost MDD Timeout...

I really need a cable signals, modems & MoCA amplifiers for dummies. 

Isn't the skip between 597Mhz & 627Mhz due to the different bonding channel? I see that those frequencies are for channels 24 and 29. When I took that snapsot, I had for download 17, 18, 19, 23, 24, 29, 30, 32. I don't see where 41, 42 & 43 come in at all.

 

When you say pole to modem cabling, I'm also confused. The cable from the street post to my amp is recent, and, as far as I can tell, undamaged or corroded. I do have the issue of the VOIP and data modems coming off the same port. 

 

My amp is in a home run panel in the garage; my modems (and power supply for the amp) are up one floor in a walk in attic. With the right tools, it's a 5 minute job to run another coax so I can put the VOIP & modem on their own ports. I could do an ugly jury rig job, too long to explain, but since my problem is intermittent, it really doesn't prove much. That's why I'd like to get a TWC tech out here to run that new coax with me.

To get a tech out here, though ... I need a few sentences to let the phone support people know that they need to schedule a tech.

 

Is this going to be enough?

I'm getting intermitted speed drop offs. The modem logs show a large number of uncorrected codewords, and I am getting bleed through of TV channels into the data channels because of unterminated outlets, a piggy backed line to my VOIP & data modems and ( fill in this blank)

Valued Participant

Re: Intermittent downstream speed issues: Lost MDD Timeout...

Oh, I also see this morning that I only have 6 channels bonded for downstream ...

I really need that book! :-)
Expert

Re: Intermittent downstream speed issues: Lost MDD Timeout...

Modem channel numbers are aliases like broadcast tv channels, they all use actual RF frequencies. TV CH's 41-43 are on 632-650 mHz and ch 45 is on 656-662 mHz.

If ingress is high enough, it also affects the nearest channels as well as QAM can't handle interference.

If there was a book on interference/ingress/egress, TWC techs would need to read it.

 

Expert

Re: Intermittent downstream speed issues: Lost MDD Timeout...

post the 6 ch ds page, need to see what's now dropped...

 

Call in to TWC intermittent service and low speeds due to downstream partial service caused by broadcast TV ingress.

Problem can't be fixed over the phone, needs a tech to repair connections.

 

 As for cable, get a premade 25 or 50' cable that has compression not crimp ends...

 

Valued Participant

Re: Intermittent downstream speed issues: Lost MDD Timeout...

First of all, I have a tech scheduled for tomorrow afternoon. I'll get a new coax run to the attic so I can get the VOIP & modem on their own cables, and I'll get terminators for my unused outlets. Tonight I'll check all the wall outlets for secure connection behind the plate.

 

I did know that channel numbers are alias for various frequencies in both broadcast & modem channels. I'm still struggling to understand how you picked out channels 41, 42 & 43 from my signal levels from the other day, and what ingress and egress are, in this context. 

 

Is ingress related to signal strength? I know that I had DVR problems a few years ago when some maintenance in the area ended up boosting the signal strength to my house. 

 

It's almost certainly not economical to train the techs in the nuances of ingress/interference/egress, but my curiosity has spiked since we've started this thread.

Thank you for all your advice. 

I'd love to learn more, so that cable signals aren't just magic.

Valued Participant

Re: Intermittent downstream speed issues: Lost MDD Timeout...

Hah!  I'd cleverly saved the full HTML pages of the signal & log tabs before I rebooted this morning.

Before the reboot, I had 6 channels bonded for download, and after the reboot, I had 8.

 

Here is the signals page pre-reboot:

Channel ID17 19 21 22 23 32 
Frequency555000000 Hz 567000000 Hz 579000000 Hz 585000000 Hz 591000000 Hz 645000000 Hz 
Signal to Noise Ratio37 dB 38 dB 38 dB 38 dB 38 dB 36 dB 
Downstream ModulationQAM256 QAM256 QAM256 QAM256 QAM256 QAM256 
Power Level
The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading
2 dBmV  3 dBmV  3 dBmV  3 dBmV  3 dBmV  0 dBmV  

 

UpstreamBonding Channel Value
Channel ID
Frequency30600000 Hz 24200000 Hz 19400000 Hz 37000000 Hz 
Ranging Service ID4581 4581 4581 4581 
Symbol Rate5.120 Msym/sec 5.120 Msym/sec 2.560 Msym/sec 2.560 Msym/sec 
Power Level49 dBmV 47 dBmV 46 dBmV 50 dBmV 
Upstream Modulation[3] QPSK
[1] 16QAM
[2] 64QAM
 
[3] QPSK
[1] 16QAM
[2] 64QAM
 
[3] QPSK
[2] 16QAM
 
[3] QPSK
[3] 16QAM
 
Ranging StatusSuccess Success Success Success 

 

Signal Stats (Codewords)Bonding Channel Value
Channel ID17 19 21 22 23 32 
Total Unerrored Codewords13346837285 13099879617 12507985156 12225318406 11940602049 5452820755 
Total Correctable Codewords1458 1267 2028 4659 1786 1937 
Total Uncorrectable Codewords4684 5641 12561 20361 22853 490916 
Sharer

Re: Intermittent downstream speed issues: Lost MDD Timeout...

Skydaver1 seems to have hijacked this thread as his own.  What happened to the original poster from the first page, named twcwf?  Has his issue been resolved?  has anything changed?