http://www.dslreports.com/forum/Line-EQ-and-signal-levels-tech-question-29528091 en Fri, 25 Mar 2022 16:14:43 EDT Fri, 25 Mar 2022 16:14:43 EDT http://www.dslreports.com/forum/Re-Line-EQ-and-signal-levels-tech-question-29529109
I totally agree with you about the levels. Downstream might look a little hot in that graph @6dB, but there is a regular 24hr cycle that drifts between 0 and 6. Its the upstream that has made the biggest change.

After 2 years of what I would call 'normal' levels, it was the massive dump that upstream took back in July that started this whole thing.

»i.imgur.com/w2uASyi.png

So the tech came out and confirmed that the issue was upstream from me, and installed the EQ as a band-aid to help a little bit. He inserted the EQ, and you can see it made very little difference. Just a tiny uptick in upstream levels. (see approx noon on the graph)

»i.imgur.com/Unbhf8K.png

So the next Tuesday, when the real repair took place, it didnt do much better. It brought the upstream up -maybe- 3dB, and actually made the SNR a little worse. (see approx 11:15 on this graph)

»i.imgur.com/4HNLcCz.png

MediacomChad tells me that these numbers are 'acceptable' and I was going to live with that as my 'new normal', until I removed the EQ. Something looks seriously wrong now. Levels were never like that -before- the 'fix'.

How does the addition of an EQ make almost no change at all, but the removal of it creates that massive chasm in the graph?]]> http://www.dslreports.com/forum/Re-Line-EQ-and-signal-levels-tech-question-29529109 Thu, 11 Sep 2014 21:00:40 EDT http://www.dslreports.com/forum/Re-Line-EQ-and-signal-levels-tech-question-29528529 If so you could recofigure those to optimize your modem levels. Downstream should be as close to 0 as possible and upstream should be around 45.]]> http://www.dslreports.com/forum/Re-Line-EQ-and-signal-levels-tech-question-29528529 Thu, 11 Sep 2014 17:14:12 EDT http://www.dslreports.com/forum/Line-EQ-and-signal-levels-tech-question-29528091 Large upstream power-level change after 3hr outage..

During the troubleshooting, a tech placed an EQ on my line. (on the house side of the grounding block) At that time, he said that my issue was upstream, and the EQ might make a tiny improvement until it got fixed. Also saying that after the fix occurs, I should probably remove the EQ. It is one of these...

»www.commscope.com/catalo ··· id=45279

I left it on the line for a week, recording a new baseline for 'normal' signal levels.

Last night, the internet went down during the maintenance window, so I thought it would be a good time to remove the EQ from my line. The results were horrific to say the least.

»i.imgur.com/e5Oh2Qh.png

My signal levels were NEVER that bad, even before the repair.

I tired rebooting the modem, to see if the signal levels would reset, but they did not. I put the EQ back on the line, and we are back to normal. Now, before you say "You didnt get his coax reconnected properly after removing the EQ." Know that the EQ is now connected to my modem, and not the grounding block outside. Meaning, the outside connection is as well connected now, as it was while the signal was measuring bad.

So the end question is... Should I have left it off longer? Does it take time (longer than 45minutes) for my modem and the head end to re-evaluate signal levels and readjust? Or is this a sign of something else wrong?

PS:
The only reason I want to remove the EQ, is that every little thing in your line between the grounding block and the modem, (splitters, long coax, etc..) results in signal loss, albeit small. I would like to do whatever I can to keep my SNR as high as possible.]]> http://www.dslreports.com/forum/Line-EQ-and-signal-levels-tech-question-29528091 Thu, 11 Sep 2014 14:57:10 EDT