Shaping radio today and tomorrow 

DAB from January 1994 | The debut of the Wheatstone A-300 | Satellite radio subscriber projections

Say goodbye to the weakest link 

Now that the FCC has accepted IBOC, we will see even more improvements as sites are updated with digital exciters and solid-state transmitters. With all of these advances in technology, don't overlook what can become the weak link: the method used to get the audio from one location to another.

Standing waves and antennas 

When problems of abnormal VSWR occur, they generally result from mechanical or electrical damage due to the transmission line or antenna, and frequently to heavy ice formation on the antenna.

Test your RF system 

Modern equipment is stable and reliable, but some things should be checked on a regular basis.

Digital radio launched 

In October the Commission announced procedures that allow AM and FM stations to immediately begin interim IBOC digital transmissions on a voluntary basis.

Motorola Symphony Digital Radio 

A look inside the radio chipset that promises improved reception without the costs of digital transmission conversion.

DA maintenance 

With the FCC's reduced logging requirements, there is no excuse for a directional array not to have adequately written maintenance logs.

Shaping radio today and tomorrow 

The oldest transmitter in daily use | Crown | S-DARS awareness

Simple solutions for a stress-free system 

A robust transmission system is one that provides superior signal and audio quality, and provides this superior product even in adverse conditions.

The Right Choice in transmitters 

There are several factors to keep in mind when it's time to select a new transmitter.

The folded unipole 

The fundamentals of the folded unipole have not changed much since 1952, but experience has provided several improvements as well as some weaknesses.

Multitenant towers 

The use of somebody else's tower can be attractive, but before rushing into a contract with an existing tower owner, consider all the problems that can occur.

Diplexing AM transmitters 

When vertical real estate is at a premium, diplexing AM stations may offer an cost-efficient alternative.

Lightning protection 

with proper engineering precautions, towers can survive intense lightning attacks.

Field Report: Armstrong FM-20000T 

This single-tube FM transmitter is reviewed.

Grounding and signal problems 

Adequate grounding means different things to different engineers.

DAB update 

The Commission is on the verge of approving the Ibiquity standard, but serious questions still exist as to the value of the system to broadcasters and whether a full-time AM system will ever work.

Impressions of NAB2002 

It would not be correct to say that IBOC was on everybody's lips at NAB, but there was considerable interest in it.

Transmitter site essentials 

Ranging from spotless high-rise suites to dirt road shacks, the transmitter site represents a station's final, vital link to the listener.

IBOC and combiners 

Some transmitter manufacturers have already announced the availability of FM IBOC transmitting equipment, and offered actual equipment at the NAB show. FM IBOC requires considerably more equipment than the AM version, and it is more expensive.

Studio to transmitter links 

To all but those who must maintain them, studio-to-transmitter links are a silent and sometimes forgotten step in the transmission chain.

Thoughts about IBOC 

Many engineers anxiously awaited the release of the National Radio Systems Committee's AM IBOC Report, in hopes that the report would reveal good news about AM IBOC.

New tower standards 

In the U.S., the joint TIA//EIA-222 standard oversees the design of broadcast and antenna supporting towers.

New Standards for Towers Near Historic Sites 

Broadcasters who propose to locate their antennas on new towers near historic sites will face greater scrutiny to determine the environmental impact of their towers.

DA maintenance 

Directional antenna maintenance is primarily an ongoing process based on experience and adequate written records.

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