Day in the Life
HD-R Processing Trickier Than Analog
5.9.2007
HD Radio audio processing has a lot in common with conventional broadcast air processing, but the HD path processing does depart considerably.
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Shared Use of Transmitter Sites
5.2.2007
For the past several months, we have taken a hard look at just about all the aspects of co-locating broadcast transmitting facilities with other broadcast and non-broadcast transmitting facilities.
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Understanding FM Systems: A New Series
5.2.2007
With this article, we begin an in-depth look at FM transmission systems.
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Antenna Gain vs. Transmitter Power
5.2.2007
How many bays do I need in my antenna and how much transmitter power do I need? These questions often do not have hard and fast answers.
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Overshoots and Close-In Coverage
5.2.2007
In this segment, we will discuss methods of dealing with the problem of overshooting the target coverage area and problems with close-in coverage.
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VSWR Bandwidth, Friend or Foe?
5.2.2007
Too often, FM antenna systems are tuned with the engineer watching the transmitter reflectometer while the tower worker adjusts the matching device on the tower.
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Rings, Stubs and Rototillers
5.2.2007
There are numerous FM antenna designs commercially available with various characteristics. Types include the panel with crossed dipole, ring, ring-stub, slanted dipole and "rototiller."
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Rigid vs. Semi-Flexible Line
5.2.2007
In the case of FM antenna systems, there generally are two choices for transmission line types: rigid and semi-flexible.
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Finding Suitable Transmission Line
5.2.2007
A broadcast engineer designing an FM transmission system has a number of choices for transmission line size and type...The factors that enter into this decision are transmitter power, line length and antenna gain. All three factors are somewhat variable.
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Proper Installation Ensures Long Life
5.2.2007
Little thought is given to proper transmission line installation in many cases. A bag of cable ties or a box of Wraplock in the tower rigger's pouch is deemed sufficient to secure the line to the tower. Most radio engineers have seen transmission line installations where little more than electrical tape or cable ties were used to secure the line.
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