[SBE Chapter 3] [Newsletter] [Links] [Officers] [Sponsors] [Freq Coordination]

May Last revision May 06, 2020

We will have a virtual meeting May 12, 7:30 PM due to CoVid- 19. Members have received an email notice for the Zoom link. If you need help with it, call Robert Nelson, listed below.

  June 9 is our annual picnic atthe Nelson home NE of Emporia. July will be with Utah Scientific with John Schilberg @ Topeka (Location is Subject to Change!). August: no meeting. September: Nautel at KTWU. October: KAB at Wichita with election of Chapter officers. November: Could be an HVS sponsored event. Location TBD December No Meeting.!

Last Meeting: Nine members and guests met Tuesday March 10 at KWCH-TV Studios in Wichita. Our meeting was hosted by Steve Reiter. Raun Hamilton of SAV arranged for Bruce Lane, Sales Manager for Telestream to give our program on Precision Timing Protocol. First, however, we enjoyed pizza furnished by Telestream prior to the meeting.

Chairman Robert Nelson opened the business meeting at 7:34 PM. Secretary Treasurer Bob Locke reported on the current bank balance for the chapter. He also reported there had been no certification activity within the chapter within the last month. Chairman Nelson asked the group if any were going to NAB this year. No one other than the vendors attending planned to go. No money in the budget, etc. Dick Abraham discussed the insertion of the business cards of speakers and program presenters in the sponsor section of the newsletter. One of the criteria for doing so already, is a $50 in kind services donation to the chapter. Most of the program presenters who provide a meal for those attending our meetings meet that criteria, and the idea was well received, therefore it will be initiated. Robert Nelson reported he had all the material in hand from Rod Hogg to begin assembling the Power Point program on Doc Brinkley, by integrating the audio tape presentation with the slide show. It will be interesting to see the finished product. We adjourned to the program for the evening at 7:44 PM on motion of Dick Abraham, seconded by Don Hogg, and vote of those present.

Raun Hamilton introduced Bruce Lane who would present the program, Bruce came from a family immersed in broadcasting. His dad, and brothers were all in broadcasting, so it was natural he would be in the same line as well. He started his career in the Boston area. In 1996 he started employment with Grass Valley and remained there for the next 15 years, then moved to Tektronix, where he has been for the last two years. Telestream is composed of three divisions formerly under the Tektronix banner: Telestream, Tektronix, and TekVideo. But Tektronix has reorganized, splitting off those three divisions while retaining 30% ownership of the new company which now goes by Telestream's name. The result is that Bruce now works almost exclusively with broadcasters. Bruce gave us valuable information about Precision Time Protocol (PTP). While in NTSC, our timing reference was the leading edge of the sync pulse, in Digital TV, it has been based on Black Burst. Accuracy in NTSC was about 800 picosecond; DTV (SDI) was 13.5 nanoseconds; but when we began transmission with IP packet technology, we ended up with 1 μsec, and is measured in the Epoch's time zero beginning in 1970.

Now, devices get their timing reference via Ethernet, where latency can change based on the number of switches and routers it passes through. When time was sent via coax only, the latency was pretty much fixed, and did not change unless the length of cable between the sync generator and the device changed. That situation changed when programming began being transmitter via IP or Packets necessitating a time stamp to be attached to video and imbedded audio. Where the black burst reference was unidirectional, PTP is bidirectional The Tektronix Prism can analyze IP Sessions, displaying the PTP tab. Unfortunately, Bruce was not able to get his hands on a Prism to show us for this program, but do go to the Tektronix web site and check it out. Bruce is uniquely qualified in his understanding of the importance of set up of a system, be it fixed, or mobile. He has an extensive background in mobile trucks, and knows the benefits of IP structure in them, due to the reduction of the amount of cabling necessary in an IP installation. This reduces the gross weight of a truck and definitely makes future cabling changes much easier. He stressed the importance of good record keeping at, and following installation of a network, since the addition of an incorrectly set piece of new gear can crash the entire network. Many remote shoots of major events still interconnect trucks at baseband, since a non-compatible truck added to the mix will only cause a loss of equipment in that truck, and will not take down the entire network dedicated to that event. Our thanks to KWCH for hosting our meeting, to Bruce Lane and Raun Hamilton for supper and for some great information during our evening program. 30

Bruce Lane of Telestream, explained the finer points of Precision Timing Protocol at our chapter meeting in March.

Our March SBE 3 program, given by Bruce Lane, was a follow up of a KAB session last October. One of the things he touched on was a comparison between Cable linked and IP linked camera connections - especially in regard to that on a remote truck. Modern cameras can have multiple return videos, multiple video outputs, along with multiple channel audio - sometimes up to 16 audio channels for each video, in addition to cueing, Intercom, etc., going to and from each camera. This can make for massive cables. This adds to the weight of the trucks, which are often designed to within 98% of their grow weight restrictions. Using IP connected cameras, you have two Ethernet cables attached for each camera. Some difference when you think about it. However, exchanging copper cable for each function within each device is not as easy as it seems since each one will now need an IP address. Getting all of those arranged and manually entered into a router or switch can be a daunting task, and if a mistake is made, can bring down a network, or slow it to a crawl, rendering it unusable. Bruce also noted that designing in a smaller router with capacity nearly expended is not a good option because you ultimately will be called on to add devices to your network that will exceed the capability of your existing router. It is likely you would have to add four routers with the same capacity as the old one, or rip the original out and add an new one with double the capacity of the old one. Neither is a good scenario. Plan for expansion from the get go! Bruce told of some of his experiences on remote shoots when he worked Bruins games. He said most remote production companies have on site frequency coordinators, and predicts that IP coordination services will soon be needed on most major remote productions.

On a multiple truck setup for a game, most outfits interconnect still at baseband, rather than IP. Many trucks still are in a hybrid mode, using some IP and some baseband connections; some are all one or the other, but the fact remains, that when interconnecting at IP, one new addition with a conflict can bring down the entire network at that site. If baseband interconnects are made, you may not get to use the extra five cameras brought in because of a connection fault, but the network remains intact and operational while the problems are being sorted out. Bruce went into great detail about correct IP setup. Most networks are built with redundant sync generators, generally labeled Grand Master References, which feed into one or more area switches called Slave Clocks that regenerate the clocking pulse. Remember that in IP, the clocking reference is a two way connection, to allow adjustment of changing latency that occurs over IP connections. The Slave Clocks reduce that two way traffic that would otherwise go back to the Grand Master Reference and bog it down. Back to the redundancy part - the setup is dependant on IP numbers assigned, and the lowest IP is selected for Priority One. Likewise on Priority two. Each is considered when a failure occurs and is most important if a failure occurs. If improperly set, the changeover will not happen and your timing will suffer or fail. Most Grand Master clocks are references to GPS for their most accurate timing, but what happens if you drive your truck into a Madison Square Garden or other building, and the GPS signal is no longer available? Check out the White Paper available under https://www.telestream.net/video/resources.htm #Literature, and click on "Diagnosing and Resolving Faults in an Operational IP Video Network" for more information and instruction on this matter.

I was thinking about o'scopes the other day and I wondered what had happened to the business of producing those scope carts that accompanied every scope not dedicated to a rack or benchtop. They aren't as prominent in control rooms now, since LED screens and computer interfaces have come into being along with the miniaturization that has occurred. Then I remembered where I had last seen one. It was in our Doctor's exam room, holding several medical monitor devices. Now the medical test gear is wheeled to the patient rather than wheeling the patient to a room where the test gear is located! The business didn't go away at all, it just morphed a little bit and expanded. A quick report on KSNW Channel change from 45 to 15.

Martin Heffner reported from Winfield last month during a 6 hour full power test. Full time full power was suppose to begin noon March 11, so in the meantime, I had rescanned the RV OTA TV and found poor reception. Without changing the antenna rotation, I checked again the afternoon of March 11. It was rock solid! I bet Warren will sleep better tonight.

Bob Locke mentioned at the last SBE-3 meeting that there might be a possibility of a program there. I think we do have a November slot open. It would appear Wichita was one of the last to complete the repack moves. In the Kansas City TV Market, KCMI-38, KSHB-41, and KSMO- 62 have already completed their moves about a year ago. In Omaha, NE, the CBS, Fox, and CW stations have already completed their moves in the summer months of 2019. In Joplin, the ABC and NBC stations completed their moves in April of 2019, and the PBS in September of 2018. In the Topeka market, KTKA - ABC-49 and KTMJ-CD - FOX-43 will be making phase 10 changes May 2, 2020 - July 3, 2020. I looked up Amarillo, TX for SW KS coverage It had 37 LP's or Translators, but no move info. All above information includes no LP-TV's nor Translator information, and was obtained from TVAnswers.org, an NAB website.

John Langer referred me to an article on hacking of Automobile key fobs found in Electronic Products Magazine. Modern cars are a rolling mass of multiple and sometimes interrelated electronic systems that control items like fuel mixture, ignition timing, braking, windshield wipers, window control, remote start, door and trunk locks, collision avoidance and navigation aids, and the list is only growing as hybrid and all electric vehicles enter the market. Who would have thought twenty years ago that you could start your car from your place of employment five minutes before you leave work, and enter a cool car, even though it has been sitting all afternoon in the sun. Today some vehicles even back out of the garage while you wait in the driveway forerunner feature of driverless cars. The problem with all this is that the keyfob that controls the above features, and the computers that handle so much of the essential functions of today's cars are not well protected against being hacked by those who will take advantage of the rich field of opportunities available to them. Key fobs work by means of a RFID transponder that sends encrypted data to the vehicle, which decrypts it, authenticates the user's ability to unlock the vehicle and to start the motor. The authentication is performed by the vehicle immobilizer, an anti theft module that gets you a discount on your car insurance. Unfortunately, that encryption can be broken in a number of ways. A Google search will yield a list of several key fob failures. Many manufacturers use and reuse the same technology as other car makers, and use the same scheme across their entire product line. The same chipset is used by most car manufacturers. This makes a successful hack on one model useable on different models of cars. Some of this is possible because the key fobs often don't have enough capacity to start their encryption based on a truly random number., Rather they base it on some public readable number such as the serial number of that key fob. One key fob uses a 384 byte EEPROM for their encryption base, allowing a rapid process of elimination attack to quickly discover a means of entry to control it.

An example of Public Key Infrastructure - (PKI). In this example, the object is to purchase goods. For vehicle entry, substitute a car in place of the retail purchase of goods or wares.

Several key fobs use strings of as little as 40 or 80 bit key lengths, making an easy hack. NIST recommends encryption lengths of 128 bits or longer for symmetrical encryption which is less secure than unsymmetrical encryption. The solution is going to take an investment in hardware (chipsets) robust enough to allow asymmetric, certificate based encryption, combined with Public Keyed Infrastructure solutions, such as those offered by Sectigo IoT Identity Management. In cryptography, a PKI is an arrangement that binds public keys with respective identities of entities (like people and organizations). The binding is established through a process of registration and issuance of certificates at and by a certificate authority (CA). Another solution in the works is available with some smart phone's secured apps made possible because of increased strength of their encryption,
and the ability of those apps to be upgraded as solutions to new hacks are attempted. However this would only be possible if the vehicle exclusively used the phone app, and not current key fob technologies. The key here is to make it so difficult to hack that there must be an easier way to make a quick buck without expending physical labor, or to establish yourself as superior when it comes to software, which seems to be one of the aims of most hackers. The possibility of easily up-gradable security fixes may be another ongoing answer to this problem - one similar to the security on your computer or smart phone, That being so, because there is no encryption that eventually cannot be broken. At present, If a security risk is discovered on a key fob, a software fix is only possible by taking the car back to the dealer for the necessary reprogramming. Were it possible to do this through WiFi in each car, security on the fly might have a chance to keep ahead of the hackers who would love to kidnap control of your car in a ransom attack.

This entire CoVid-19 situation is amazing. I read recently about one fellow that had washed his hands so many times he re -discovered crib notes he had written on his hands for a pending seventh grade history examination. It is as though the entire world has been put on time-out, universally affecting economies, social behavior, political campaigns, and definitely providing more news fodder than has been available for a century or more. Let us all hope something is learned from it. It will be interesting to compare notes between those of you who had to rig up connections in several different locations for on-air personalities working from home. For the most part of the ones I have seen, they have been fairly solid. I'll be surprised if that isn't a topic of conversation at the annual Chapter 3 picnic. The thing that amazed me is the speed with which this was accomplished on the three major networks in Wichita. It had to be with IP. Newly announced

President/Executive Director (of KAB) Allison Mazzei is getting a great education on how to handle extraordinary events. Allison will start on June 1 and will continue to work with Kent the remainder of this year. She is a communications and fundraising strategist who has worked with dozens of organizations during her career to connect and cultivate their constituent bases. She spent the past 12 years at Pennington and Company where she was recognized for outstanding customer service and for achieving fundraising milestones for multimillion-dollar campaigns. Allison holds a BS in journalism from the University of Kansas and resides in Lawrence, Kansas, with her family. Welcome Allison! As always, stay strong and call if the KAB can help. (From KAB Transmitter) Kent Cornish has been tutoring Allison, and will continue to be available for consulting to KAB after he retires. His service to broadcasters in Kansas has been extraordinary. We wish him well in his new venture of life.

Pandemic Resources available through KAB

KAB COVD-19 Resource Center https://www.ksbroadcasterscovid19.com/

Sales Ideas webinars from Derron Steenbergen and Speed Marriott

Crisis Management Webinar with Mark Levy

Legal webinar on the Payroll Protection Plan and SBA Loans

Legal webinars on FCC action during COVID

Advocacy alerts with our Kansas Congressional Delegation to seek funding for broadcasters

Working with PBS/NPR stations and Department of Ed to present daily content from teachers for students
of all grade levels to watch and learn

As we get ready to publish, the Governor of Kansas has outlined a four phase program to return to normal from CoVid stay-at-home status. Our chapter should be good for the SBE-3 Nelson picnic on June 9. Our by-laws allow for reimbursement of expenses relevant to the chapter, so Robert can purchase meat, buns, and other items deemed necessary for the picnic meal that evening. If you would like to bring a side dish, chips, or dessert it will add to the variety and quality of the meal. RSVP to Robert please. We will notify you if conditions change concerning the June meeting. Bring your shotguns & armament for target or a clay pigeon shoot, and we will see you there. 30

Newsletter Editor: R.W. Abraham

CPBE / CBNT Regional Engineer Cox Cable Wichita Retired

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