RxMER Archives

8 08, 2023

Managing DOCSIS 3.1 Channel Bonding: Ensuring Optimal Performance

Mia Colabrese2023-08-08T16:50:41-04:00August 8th, 2023|

Welcome to another thrilling episode of "Get Your Tech On"! In this highly informative livestream, we delve into the realm of managing DOCSIS 3.1 channel bonding to ensure optimal performance in your HFC network. Join host Brady Volpe, founder of The Volpe Firm and Chief Product Officer of OpenVault, as he teams up with the brilliant John Downey, CMTS Technical Leader at Cisco Systems, to explore ingenious strategies for overcoming challenges with modems not bonding to OFDM / OFDMA channels and offloading traffic from SC-QAM channels. Discover the

5 07, 2023

SNR (RxMER) and DOCSIS 3.1 Modems

Mia Colabrese2023-07-05T16:32:25-04:00July 5th, 2023|

Welcome to another engaging episode of Get Your Tech On, titled "Your Questions, Our Answers: SNR (RxMER) and DOCSIS 3.1 Modems." In this episode, we delve into listener queries about DOCSIS technology, focusing on Signal-to-Noise Ratio (SNR), RxMER, and the details of DOCSIS 3.1 modems. Our host, Brady Volpe, founder of NimbleThis and The Volpe Firm, is joined by the highly knowledgeable John Downey, CMTS Technical Leader at Cisco Systems. Together, they explore the intricacies of these complex topics, helping to shed light on the common RF issues

28 12, 2021

House amps, Cable Modems with filter issues

Mia Colabrese2022-03-14T13:42:30-04:00December 28th, 2021|

In this episode Brady Volpe of Nimble This and The Volpe Firm, and John Downey (of Cisco) elaborate on how to use PNM tools to identify house amps, Cable Modems with filter issues, etc. So houses can be identified with incompatible filters for intended UpStream spectrum deployments. Want to know what might be interesting and useful to you? Join in on the discussion and ask questions in the chat for another power hour of cable and the discussion on all things DOCSIS and beyond. Give us a thumbs

23 11, 2021

Why RxMER?

Mia Colabrese2021-11-23T16:42:11-05:00November 23rd, 2021|

The DOCSIS 3.1 PHY specification includes several PNM parameters and tests. One of the most useful downstream tests for OFDM is called receive modulation error ratio (RxMER) per subcarrier. RxMER per subcarrier provides an MER measurement for each subcarrier in the OFDM (downstream) or OFDMA (upstream) channel. This means if an OFDM channel has 7600 subcarriers, the RxMER per subcarrier data will provide 7600 MER results, one corresponding to each subcarrier. When plotted, it looks like a spectrum analyzer chart, but has different meanings. See Figure 1 for

3 09, 2021

Interpreting Full Band Capture and RxMER

Mia Colabrese2021-09-03T10:44:50-04:00September 3rd, 2021|

In this episode Brady Volpe of Nimble This and The Volpe Firm, and John Downey of Cisco discuss interpreting Full Band Capture (FBC) and RxMER which is the MER of the subcarriers in the OFDM channel. Cable is a technology business and we seem to always come up with new terms and new things to understand and interpret. FBC has been around now but still not everyone knows what it means and how to understand it correctly. RxMER is a bit newer but can still be mysterious

13 02, 2020

Misunderstood RF Measurements

Mia Colabrese2021-08-17T10:50:22-04:00February 13th, 2020|

Hello Everyone. This is episode 55 of Get Your Tech On, our show on All Things DOCSIS. I'm Brady Volpe, Founder of The Volpe Firm and Nimble This. John Downey is with me and also CMTS Technical Leader at Cisco Systems, and Ron Hranac also of Cisco Systems, welcome John and Ron. Today we are going to discuss Top Commonly Misunderstood RF Measurements. An overall discussion on confusing topics and commonly misunderstood RF measurements in cable. Over 100 years of RF knowledge. Topics Covered: Fun Math problem