Navigating the Ingress Labyrinth: Management, Mitigation, and Mastery (Part 2)

[@wcash001]

Another Gripping training session! A few things to note. Tap manufacturers make full band equalizers 5MHz - 1.8GHz that cover not only the return path but also equalize the forward path. This allows for very consistent forward and return levels. In addition, these equalizers equalize the most at the lowest and noisiest part of the spectrum. I agree, getting housings secured using the proper tightening sequence and torque specification is an area our industry could improve on.

[@Volpefirm]

Thanks Woody for the great info. I’m pinning your comment for others.

[@Travisstebelton]

Excellent educational presentation!

[@Volpefirm]

Thank you kindly! Thanks for watching and the feedback too. It's great to see the response.

[@timcat1004]

@ 46:00 I had the CPAT unit for leakage. It was broken more often that it worked. The other problem I had was they kept on setting it to geo change frequencies to one that didn't even exist. Mainly towns that had off-sets. I spent years arguing with management. During my last 3-4 years I didn't care anymore because I was retiring.

[@Volpefirm]

Hi Timcat, happy retirement, hope that you are enjoying the heck out of it. :)

[@Todd.T]

CPAT works for us, but you can spot ingress/egress a few other ways. One is to look at the DS spectrum because you will see cellular ingress bringing down the SNR of any carriers near the cellular transmitting frequencies. I use a free online tool that tells me where the towers are, the azimuth of their output, how wide the carrier is and how much power they are emitting. You can see the issues, preferably with a PNM tool. For onsite issues, I use a leakage detector tuned to an OFDM carrier. I've had issues that I spotted with a PNM tool. If it was aerial, I used the leakage detector. If it is buried, I used a TDR and then walked it out to the open and then used the leakage detector. Three feet straight down under concrete, I located the open. The OFDM carrier had a PLC at around 350mhz. My detector is set for OFDM PLCs at 216, 350, 920. I can just check the CPAT maps, but once we went to a digital node, I don't think we inserted signal....yet When we go tp 204mhz return, we will need to rely on the PNM tool and OFDM leakage detctors until we switch.

[@EricGrumling]

Is there any interest in developing a standard leakage signal that is interoperable with different manufacturers' equipment?

[@Volpefirm]

Hi @EricGrumling for DOCSIS 3.1 we have something like this called OUDP. Find out more here: kzbin.infoo-ow3XBtzJE where we discuss OUDP Leakage Detection Explained.