Brady Volpe and John Downey discuss what you can expect to get out of DOCSIS 3.1 cable modem today. How many modems can transmit in a 6.4 MHz OFDMA channel? How much life is in the DOCSIS 3.1 modem for your network. Also a SCTE EXPO overview and wrap. What is Possible with a DOCSIS 3.1 Modem Today? This is episode 85 of Get Your Tech On, our show on All Things DOCSIS. Our topic for today is What is Possible with a DOCSIS 3.1 Modem, an
OFDMA — It’s Trending What’s trending in cable? It’s OFDMA or orthogonal frequency division multiple access. OFDMA is the upstream counterpart to OFDM, which stands for orthogonal frequency division multiplexing. Both are part of the DOCSIS 3.1 specification and are intended to increase speed over the DOCSIS network far beyond what can be achieved using legacy SC-QAM channels. Most cable operators deployed OFDM first because the downstream had already reached data capacity limits. OFDM enabled expanded data capacity without node splits. Now that OFDM has been successfully deployed,
In this episode Brady Volpe of Nimble This and The Volpe Firm, and John Downey (of Cisco) answer viewers questions about upstream SNR / Diplex filters / OFDMA / ICFR Want to know what might be interesting and useful to you? Join in on the discussion and ask questions in the chat in another power hour of cable and the discussion on all things DOCSIS and beyond. Give us a thumbs up if you like her content. The discussion is on all things DOCSIS. Tips, suggestions and recommendations. Another
In this episode Brady Volpe of Nimble This and The Volpe Firm, and John Downey (of Cisco) talk the latest technologies and trends in the Cable industry, especially around DOCSIS 3.1 and 4.0. We will be focused on key topics from Light Readings Next-Gen Technologies & Strategies. Want to know what might be interesting and useful to you? Join in on the discussion and ask questions in the chat in another power hour of cable and the discussion on all things DOCSIS and beyond. Give us a thumbs up
In this episode Brady Volpe of Nimble This and The Volpe Firm, and John Downey (of Cisco) discuss Upstream Transmit Power with OFDMA and elaborate why a cable modem’s transmit power is extremely important. It not only determines if the cable modem will be able to come online and register with the CMTS (cable modem termination system) but obtaining the optimal transmit power will make or break the subscriber’s quality of experience (QoE). A DOCSIS 3.1 cable modem’s transmit power introduces some new considerations which are discussed in this
A cable modem’s transmit power is extremely important. It not only determines if the cable modem will be able to come online and register with the CMTS (cable modem termination system) but obtaining the optimal transmit power will make or break the subscriber’s quality of experience (QoE). A DOCSIS 3.1 cable modem’s transmit power introduces some new considerations which are discussed in this article. Why is DOCSIS 3.1 cable modem transmit power important? Transmit power per channel is defined as the average RF (radio frequency) power in the
Recommendations to resolving DOCSIS 3.1 cable modems crashing with OFDMA Place OFDMA channels above 42 MHz: For those fortunate with 5-65 MHz or 5-85 MHz return paths, keeping four 6.4 MHz SC-QAM signals below 42 MHz and then loading one OFDMA channel above 42 MHz is ideal. Your SC-QAM channels should be fully optimized with dynamic profile modulation up to 64-QAM. Then, by placing your OFDMA channel above 42 MHz, you’re ensuring its likely to be in a low noise environment. A bonus is that subscribers with in-home amplifiers
Why are the DOCSIS 3.1 Cable Modems Crashing with OFDMA This too shall pass. Yes, we’ve seen this before: OFDMA + DBC = BSoD Yes, you have experienced it. Either as a subscriber or technician. The cable modem is on but there is no data flowing through it. Reboot the modem and it works again. It’s the equivalent of the Microsoft Windows blue screen of death (BSoD) and it’s back with a vengeance for cable operators running DOCSIS 3.1 OFDMA with a noisy upstream. What gives? I will
Dynamic Range Window (DRW) and OFDMA Upstream Troubleshooting. Tips, suggestions and recommendations. Another power hour of cable with Brady Volpe and John Downey CMTS Technical Leader at Cisco. More and more operators are introducing OFDMA into their networks and experiencing a learning curve with its introduction and Dynamic Range Window issues. Find out ways to overcome these issues and ask any questions you may have. The discussion is on all things DOCSIS. Basic recap of Dynamic Range Window also see our previous OFDMA podcast or live stream. Dynamic
OFDMA Upstream Troubleshooting. Tips, suggestions and recommendations. Another power hour of cable with Brady Volpe and John Downey CMTS Technical Leader at Cisco. More and more operators are introducing OFDMA into their networks and experiencing a learning curve with its introduction. Find out ways to overcome these issues and ask any questions you may have. The discussion is on all things DOCSIS. OFDMA "UPSTREAM" Troubleshooting: General intro OFMDA Upstream. The A means upstream 50% increase in upstream traffic Noise in return Cable Modems locking up CM locking up
