Raymond, Maine-based Dielectric Communications’ broadcast specialists have been chosen to give four presentations at NAB2006, to be held April 22-27 at the Las Vegas Convention Center. On Sunday, April 23, from 10 to 10:30 a.m. in room S226/227, Dielectric Technical Director Henry Downs will discuss the feasibility of upgrading existing multichannel FM analog sites to […]
Raymond, Maine-based Dielectric Communications’ broadcast specialists have been chosen to give four presentations at NAB2006, to be held April 22-27 at the Las Vegas Convention Center.
On Sunday, April 23, from 10 to 10:30 a.m. in room S226/227, Dielectric Technical Director Henry Downs will discuss the feasibility of upgrading existing multichannel FM analog sites to incorporate digital transmission in “Design Considerations and Real-Life Performance of a Multichannel Analog/Digital FM Antenna/Combiner System.” He will describe the design and implementation required to upgrade an existing 10-channel combiner and dual run of transmission line, including considerations of a new design for the circularly polarized FM broadcast antenna. Downs also will address concerns regarding isolation, input VSWR, power handling, and pattern performance.
“After Analog TV: What Will the Antenna/Transmission Line/Filter Systems Look Like?” will be presented from 4 to 4:30 p.m. on the same day in room S219/220 by Kerry Cozad, Dielectric’s senior vice president of broadcast engineering. He will review the design transitions for antennas, transmission lines, filters, and combiners from analog to digital. Cozad will then propose the next stage of transition—including the possibility of combining services for new revenue opportunities—that will occur as the spectrum is opened up for additional services in the present broadcast TV band. After addressing concerns and reviewing new design criteria, he will offer a buyer’s checklist.
Cozad will follow up that discussion on Monday, April 24, from 3 to 3:30 p.m. in room S219/220 with “Disaster-Recovery Plans for Antenna Systems,” covering both TV and FM services. Recognizing that the damage caused by hurricanes in the fall of 2005 has renewed awareness of the importance of free over-the-air broadcasts, he will focus on details regarding the alternatives for emergency use of antennas, transmission lines, and transmitter RF systems. Real-life instances will be used as examples, and engineering charts, comparison graphs, and sample bills of materials for emergency packages will be supplied to the seminar attendees as well.
Dan Harris, product manager of aviation obstruction lighting, will give Dielectric’s final presentation, “Aviation Obstruction Lighting: OEM Parts—New Regulations and Their Impact,” on Wednesday, April 26, from 2:30 to 3 p.m. in room S227. Because technical lighting systems and their operation are subject to several FAA and FCC regulations, Harris will address how these different regulations fit together to form the basis for installation and operation of aviation obstruction lighting systems. He will focus on the recently developed replacement parts issue and cover current regulations and the proposed direction of future regulations.