The simple view of interference meaning overlapping signal contours tends to overstate the area of potential interference. Jeremy Ruck explains.
While the FCC designed its pattern modeling method to be reasonably accurate over a fairly broad slice of circumstances in the United States, it tends to fall apart in situations in which terrain is abnormally smooth or cases where a particular propagation path has some fairly significant undulations.
Network analyzers come in two flavors: scalar and vector. Jeremy Ruck explains their use.
Regardless of which antenna you select, the best quality antenna you can afford should be chosen as this is the last item in your transmission chain, and the last point over which you have control of your signal.
The L network is the simplest of the impedance transformation networks, and is the basis for the more complex T, Pi and other types of networks.
The connection between LPFM and translators is a result of the necessary implementation of certain provisions of the Local Community Radio Act of 2010 (LCRA).
No doubt, you have received frequency coordination notices. These notices form one side of the coordination process. It's up to you to follow through to avoid potential interference.
Some important events relating to translators warrant some attention.
The tee network seems almost magical as it has the ability to transform between almost any two complex impedances using only reactive elements.
Jeremy Ruck reviews the basics of directional antenna arrays.
It is prudent to create and maintain a plan for disaster recovery at your facilities, which includes maintaining a strong working relationship with your consulting engineer.
FCC rules, IEEE and NCRP standards are designed to reduce the potential for human danger.
First and foremost in any tower maintenance program is to build a solid relationship with a tower crew; and you get what you pay for. Jeremy Ruck explains.
At the heart of the moment method proof is a computer model using an appropriate software package, however, the moment method proof, is not applicable in all cases or array designs.
FM translator service, since its inception in the very early 1970s, has been subjected to several major technical overhauls.
Understanding the mechanics of your RF program delivery system, and maintaining a keen grasp of the associated fade margin can go a long way to diagnosing the rare, but ultimately problematic impact path failure can have.
One good working definition of the Smith chart is that it is simply a graphical calculator for normalized impedance and associated RF parameters.
The bottom line is that without maintenance, transmission line will ultimately fail. The good news is that with regular and periodic inspections, the likelihood of unplanned failures is greatly reduced.
The bottom line is that Revision G is a good thing, and the standard authors have crafted an excellent standard.
One of the hallmark missions of the FCC is to promote the use of the radio spectrum; the corollary is that the Commission ends up being a traffic cop to eliminate interference, more accurately stated as reducing interference.
While there are similarities between various grounding methodologies, asking 10 engineers for their opinions will probably return a minimum of eight different and valid recommendations.
The upcoming generation of radio engineers will encounter a new ease of measurement as a fact of the Commission's new directional antenna proof rules.
The development of the operating impedance bridge by Delta Electronics about 40 years ago made antenna impedance measurements not only much easier to perform, but more accurate.
John Battison looks back on the early days of the FRC and the FCC, recalling some of the simpler times and possibly better methods of another time.
As time passed and DA design work received increasing attention, it became obvious that more information was needed about how the antenna worked in its environment once constructed.