SCTE DOCSIS 3.0 Presentation Blacksburg, VA
DOCSIS 3.0 Troubleshooting, SCTE Blacksburg, VA View more presentations from The Volpe Firm, Inc.
15
05, 2012
2
05, 2012
Why is QAM Getting Me Down?
64-QAM lower than Analog video on the downstream? 64-QAM lower than 16-QAM on the upstream? Why is a 6.4 MHz channel lower than a 3.2 MHz DOCSIS channel? Someone said there is math for all of this, but man QAM is getting me down! These questions come up in every lecture I give on DOCSIS. Why do QAM measurements show up at different levels on a spectrum analyzer than analog measurements. What's more, why do QAM signals of different bandwidth have different levels? Some of the questions have
29
03, 2012
Free DOCSIS Config File Editor – Awesome
Thanks to Excentis, a leading and solid provider of highly specialized testing, consultancy and training services for access network technologies(cable, xDSL, wireless, etc) and related services (e.g. VoIP and iDTV), we can all have a free DOCSIS Config File Editor.
1
03, 2012
Impact of Impulse Noise on Adaptive Pre-Equalization Part II
In part I of this article I discussed adaptive pre-equalization in DOCSIS cable modems and how it can compensate for many upstream impairments such as frequency response, group delay and micro-reflections. I also left off with a cliff-hanger, which is also the title of the article; impulse noise has an impact on adaptive pre-equalization, but how and what is it? I'll cover both what impulse noise is and why and how it impacts adaptive pre-equalization.
29
02, 2012
Impact of Impulse Noise on Adaptive Pre-Equalization
For those of you who have attended my seminars you are familiar with adaptive pre-equalization in cable modems (if not I'll explain it in detail momentarily). Also, if you have done any amount of RF plant troubleshooting you are certainly familiar with Impulse noise (again, I'll cover this too). But if you are like me, I never knew that the two topics were co-related.
27
02, 2012
DOCSIS 3.0 Cable Modem Registration
This article will discuss the channel bonding process and ultimately the DOCSIS 3.0 cable modem registration process. In order to be able to understand this article, I will make many references to my prior article on Cable Modem Registration which focused on DOCSIS 1.x and 2.0 cable modems.
26
01, 2012
Advanced Troubleshooting in a DOCSIS 3.0 Plant
If you missed the SCTE Cable-Tec 2011, I am making available my presentation and white paper on Advanced Troubleshooting in a DOCSIS 3.0 Plant. Each speaker had only 20 minutes to cover topics that could easily last hours, so the presentations are understandably brief. Below you will find my presentation in "Slideshare" for online viewing as well as a fully downloadable PowerPoint version. The PowerPoint version also has reader notes attached at the bottom of each slide which you may find useful. In addition, the animations work a little better in the downloadable version.
21
12, 2011
DOCSIS 3.0 Impaired Service
"Impaired Service" in which case one or more bonded upstream channels are impacted by upstream RF impairments while other bonded channels are not. Since subscriber data is striped (that is broken into pieces and spread across each upstream channel and then re-assembled by the CMTS), some of the data will be lost or have errors while other data will not. Subscribers will most likely notice an impaired condition as upstream data rates slow down due to TCP/IP transmissions and/or VoIP, gaming, teleconferencing and other real-time applications will be noticeably impacted.
7
12, 2011
DOCSIS 3.0 Partial Service
Partial Service is a new term encountered in the DOCSIS 3.0 MULPI specification and realized in field deployments of DOCSIS 3.0 cable modems using upstream bonding. This was a topic that I touched on in this years SCTE Cable-Tec Expo, but will explore in greater detail in this article. Partial service can be considered a feature because the cable modem will stay online even when one or more upstream transmit channels goes offline.
28
09, 2011
BTR | Rollouts Continue as DOCSIS 3.0 Matures
The following article just released by Broadband Technology Report was written by Carl Weinschenk. A number of us from the industry contributed to Carl's piece, but it is a nice high-level summary article on the status of DOCSIS 3.0. Below you will find a snippet of the article with a link to the BTR website for the complete read. Enjoy. Rollouts Continue as DOCSIS 3.0 Matures There are just two areas of concern as the rollout of DOCSIS 3.0 continues: the upstream and the downstream. Observers seem satisfied