Rules for Digital Auxiliary Services Proposed 

In an ever-evolving effort to smooth the transition from analog to digital technology, the Federal Communications Commission is proposing to revise its rules to allow broadcast auxiliary services (BAS) to convert to digital technology along with broadcast stations.

Thoughts on FM 

I often wonder if Major Armstrong knew what he was giving to the world when he began developing frequency modulation as a public service.

Tall AM towers 

Usually, bigger is better. But in the case of AM towers, taller is not always better. A very tall AM radiator is not always the best radiator. In fact,

Transmitters, towers and antennas at NAB2001 

Discussions with FM engineers unearthed concerns about radio's future when considered with reference to streaming, DAB/IBOC, RBDS, satellite radio, and

The licensing process 

Whoever said, the more things change, the more they remain the same, must have had the FCC in mind. More than 50 years ago, Form 301 was thin and did

The Transition To Digital 

Incrementally or all at once, the transition is coming. How digital is your facility?

Detuning unwanted reradiators 

Like mushrooms after a heavy rain, unwanted reradiators sometimes appear almost overnight in the near field of AM antennas.

Mutual impedance 

Matters of impedance are deeply significant in radio engineering. In audio, with lower frequencies, the actual component values are generally considerably

Field Report: Audemat FM-MC3.2 with Goldenear 

At some point in an engineer's career, questions such as How does our signal compare to so-and-so? or, Have we increased multipath along the highway lately?

Transmission - Transmitters 

Antenna basics 

The author Gertrude Stein once said a rose is a rose, is a rose is a rose. Maybe an antenna is an antenna, is an antenna also applies, but an AM antenna

AM tower installation 

If you have the good fortune to be responsible for the installation of a directional AM station, you will find that there are many important details that

Parasitic radiators 

A look at the theory of controlled parasitic reradiators and possible directional arrays using parasitic elements.

Care of transmission lines 

Most radio engineers will agree that after the antenna and ground system, transmission lines are probably the most neglected item. For both AM and FM,


Andrew PMT200 DryLine: A fully automatic device that covers systems with volumes from 0.01 to 1700 liters (0.01 to 60ft superscript 3), this dehydrator

Using the operating impedance bridge 

Many test instruments have been developed in the history of broadcast engineering. Some have had brief lives; others simply filled the needs that many

Parasitic radiators 

A radio engineer's definition of a parasite might be something that obtains its power from another's energy. In other areas of broadcast engineering it

Tower maintenance 

Tower maintenance may not rank up there with your top 10 engineering duties: It's costly and time-consuming. Tower work is usually contracted, so engineers

How is your VSWR? 

One phenomenon common to transmitter installations does not always receive the attention it warrants. Voltage standing wave ratio (VSWR) can wreak havoc

Transmission - STLs 

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