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January Last revision Jan 11, 2021

Next Meeting: January 12, 2021 at 7:00 PM is our next virtual meeting via Zoom. Our program will be given by Benjamin Nemser who will present an overview of the practical applications for Fiber Optics in HD AV and Broadcast, including a demonstration of fiber termination, cleaning, and testing. This is not something you need every day, but priceless if you are suddenly off air, and you are equipped with knowledge and gear to correct the situation. You will be the hero of the day! Note that for your next pay review. Don't miss it. See you then.

Last Meeting: Ten members and guests met via Zoom on November 17, with Chairman John Langer opening the SBE-3 meeting at 7:00 PM. The minutes of the past meeting, as published in the SBE-3 Newsletter, were accepted as published. The Treasurer's Report was given by Dick Abraham for Bob Locke, and Vice Chair Robert Nelson reported on future meetings. There is no December meeting and our next meeting is scheduled for Tuesday, January 12 with a Zoom session and a program given by Benjamin Nemser who will present an overview of the practical applications for Fiber Optics in HD AV and Broadcast, including a demonstration of fiber termination, cleaning, and testing. There being no other business, the meeting adjourned at 7:09 PM to the program for the evening. It was presented by Karl Kuhn of Telestream on the Tools to Troubleshoot ST2110 Networks - Lessons Learned and Best Practices. Karl Kuhn is a Principal Solutions Architect at Telestream specializing in next gen test and measurement of ST 2110 IP, ST 2059 PTP, 4K and UHD, HDR and WCG, and transmission. Prior to Tektronix (2000) he was the lead Video Test Engineer for IBM. Karl holds 3 U.S. patents and 1 Japanese patent that cover In-service Testing of Digital Broadcast Video. He is a contributing author for chapter 2.9, 11th Edition of the NAB Handbook covering Digital Video Standards and Practices. He is the SMPTE Eastern Region Governor and Past SMPTE North American Sections Director. In 2015 Karl was raised to SMPTE Fellow, and is a Certified Project Management Professional thru PMI and the George Washington University. He presented a tutorial on what you need to know to understand the challenges we face in making the transition from SDI to an IP based transport for video, audio and data. Karl shared what he has learned by being involved in several ST 2110 and ST 2059 deployments.

New troubleshooting methodologies are required to visualize variable delay across the network and how critical multilayer trend measurements can be made on the stream to improve QoS and QoE. The entire process began with the amount of coax required to meet network requirements for over the road mobile trucks. The Interstate highways have an 80K lb. Max, so it seemed fiber optics might be a solution to lighten the load. However, simplifying can bring its own complexities. It became apparent that the old network protocols were not going to be able to handle the requirements thrust upon the industry with the move toward more and more resolution in video and the audio of the future. Perhaps a better solution would be one that reduced the tractor-trailer units on the highways altogether. What if you could do video capture in one state, edit and assemble in another and ship it all to network switching in yet another location. What about audio? It would have to be attached to the video to keep those matched together. The Internet is going to have no guarantees on route delay or latency. Hmmm. The basis of the new network has to be Precision Timing Protocol for all parties involved in handling any part of a program. That too would have to be included in the program data flow from origination to final product. Without that, you would never get all the pieces recombined in any order that made sense. Our order of stable fixed timing is no longer a given. Now, configuration of all components currently, or in the future on a network, becomes very important, because each one must be synced with, and adjusted for the proper delay in a dynamic way. Besides configuration, even the cleanliness of fiber connections becomes of paramount importance. There are no patch panels to assist with trouble shooting, and we are left with having to develop new network analyzer tools that can inspect dataflows before and after any piece along the network. Karl recommends immersing yourself in not only PTP, but knowing by heart the standards set out in ST2110 and later publications covering the new networks being developed. There are very few of us that have had the opportunity to design and build a new all digital facility.

Karl Kuhn is a Telestream Principal Solutions Architect specializing in
Next Gen Test and Measurement of ST 2110 IP, ST 2059 PTP, 4K, UHD,
HDR and WCG, and transmission. Prior to Tektronix (2000) he was the
lead Video Test Engineer for IBM.

Most of us are still stuck in some form of a hybrid cross between SDI and the networks now being designed. Karl's best advise here, is to be sure and get a good System Integrator to assemble and build your new plant. They will pay attention to such details as making sure that every component of your plant is properly configured, and that such information is entered into a book given to you when they are finished. Make sure you continue its accuracy by creating a log of events pertaining to any changes or maintenance performed on any part of your plant from that point on. Call it a book of knowledge, a log, or what ever you like, but make it a rule that whomever does any work on your facility enters into it what and when it was done. It helps if you have to revert to the previous configuration to get back into a working state. Karl says when networks become troubled he has found trying to marry new and old switches together often can cause problems, simply because they don't adhere to the same protocols. He also has found that what was designated as the "Grand Master" clock can become overwhelmed when having to constantly respond to component timing responses.

As networks grow, the Grand Master needs to hand those type of responses off to Boundary Clock units. These can be added as necessary to handle added components on your network. Make sure each Grand Master has its own GPS network, and put some space between each of those, reducing the chance of wind damage eliminating the GPS signal to both units. Yes, you need two independent networks for redundancy, and a seamless switch between them. Each part of a distributed network must have its own Grand Master. No one said this was going to be cheap. Which brings up another point. You should present your need for test gear to management as a business case. Managers often have accounting backgrounds, and test gear should be presented to them as an item that saves them downtime, added personnel, and therefore money. The question came up as to what Prism (ST 2110 Network Analyzer) range of cost might be? Karl said that at present, $12 - $38K should be planned in your budget, depending on how many bells and whistles you need. It is mostly in already in the software, so it usually is a matter of buying whatever you need and entering the correct license key to obtain access to the next level of testing.

 

The entire PowerPoint presentation made by Karl is available from Richard Abraham. You may request a copy by emailing Richard at: rabraham2@cox.net.
Total file size is roughly 10 MB.

 

 

 

Our program ended and we stood adjourned at 8:20 PM, on motion of John Langer, seconded by Ron Jones. This was an excellent presentation, with plenty of time allowed for interaction for those with questions. Our thanks to Karl Kuhn and to Telestream for the presentation. His card is included with other supporters of SBE-3, on page 5, if you wish to contact him. I hope all of you enjoyed the holidays to the fullest, although things were, as one of my neighbors put it, "strange, this year". Many family traditions were postponed, or new ones invented because of the CoVid-19 pandemic.Some families met via Zoom for their Christmas meal, while others limited the size of the gatherings considerably or met with one part of the family at a time to limit the size. Our family followed the latter choice. My wife found it difficult to cook Christmas dinner for so few, so she packed up a plate for our neighbor who wasn't able to go out of state to visit his daughter this year, and though we didn't eat together, we were able to share our Christmas meal in that way. However all that may be, we can all be hopeful the vaccines can put an end to the CoVid, and life can get back to something resembling normal. or an acceptable substitute.

Have you considered SBE Member- Plus as an option? From January 1, 2018, individuals have been able to choose to join or renew as a Regular, Senior or Associate member (based on eligibility) at the traditional low-cost rate of $85, and purchase any SBE online education program a la carte. SBE MemberPlus has all the benefits of Regular SBE membership and includes access to all the live and archived Webinars by SBE in the SBE catalog plus any new webinars the SBE adds during the membership year, but at a higher cost. You get free access to the extensive SBE webinar education resource, which is an enormous benefit, For less than the cost of two Webinars by SBE, the member who opts for SBE MemberPlus will have access to all the online education programs that cover a wide range of technical broadcast and media topics, for one year. So what brought this up? January 21, SBE will host a new Webinar: #1 in a series on Networking. If you have been thinking about Certification in Networking, here is an excellent place to start. Yes, as an SBE Regular Member, you can watch this Webinar for $62. But, for $85, less than the cost of two Webinars, you get access for a year to any or all of the recorded Webinars SBE has done. Give it some thought, You could be on your way to SBE Network, or another SBE Certification!

A 6" snow on New Year's Day made me glad I had the foresight to run the snowblower through the shop for a long overdue tune up. It started on the first pull, and an half hour later, our driveway was clean, with the remnants melting in the early afternoon sunshine. The snow blower's carburetor float valve had been stuck open with old gas goo, making it easy to flood the engine and hard to start. Now, I use non-ethanol in all my gas engines for tools. When you are done with the job at hand, either empty the unused gas back in the supply container or install a cut off valve so you can run the carburetors dry. It costs a bit more, but my chain saws have survived many years with this practice, and they are always ready to go when next called on for use. 30.

 
Chapter 3 Zoom Meeting Attendees November 17, 2020

To attend the January 12, 2021 virtual meeting via Zoom at 7:00 PM, watch for the link Vice Chair Robert Nelson, will send to members of record. If you don't receive a notice, and wish to attend, e-mail Robert at: rfnelson@k-state.edu, and he will send you a link.

Newsletter Editor: R.W. Abraham

CPBE / CBNT Regional Engineer Cox Cable Wichita Retired

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