The oldest transmitter in daily use | Crown | S-DARS awareness
A robust transmission system is one that provides superior signal and audio quality, and provides this superior product even in adverse conditions.
There are several factors to keep in mind when it's time to select a new transmitter.
The fundamentals of the folded unipole have not changed much since 1952, but experience has provided several improvements as well as some weaknesses.
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.
When vertical real estate is at a premium, diplexing AM stations may offer an cost-efficient alternative.
with proper engineering precautions, towers can survive intense lightning attacks.
This single-tube FM transmitter is reviewed.
Adequate grounding means different things to different engineers.
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.
It would not be correct to say that IBOC was on everybody's lips at NAB, but there was considerable interest in it.
Ranging from spotless high-rise suites to dirt road shacks, the transmitter site represents a station's final, vital link to the listener.
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.
To all but those who must maintain them, studio-to-transmitter links are a silent and sometimes forgotten step in the transmission chain.
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.
In the U.S., the joint TIA//EIA-222 standard oversees the design of broadcast and antenna supporting towers.
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.
Directional antenna maintenance is primarily an ongoing process based on experience and adequate written records.
Solid-state, digital exciter
There are very few jobs in broadcasting where one can start at the top; but tower maintenance is the one where it is best to start at the top and work down.
For towers that require incandescent lighting, regular tower-light inspection and maintenance is a task that tower owners must undertake. The annoyances lie in changing a burned-out lamp, affording the cost of a tower climber, timing convenience of the failure.
Solid-state technology has taken over the major AM broadcast transmitter manufacturers, and up to 40kW of solid-state power is available in FM. When making the decision to buy a new transmitter, there are several factors to consider.
Part One described the events leading to the development of top loading of broadcast AM antennas. This part continues with details of the types of top loading and discusses the use of the FCC's Rules in planning a top-loaded antenna system.
In November 2000 the Commission created a new FM channel classification to join Classes A, B, B1, C, C1, C2 and C3. Use of the new class - Class C-0 (C-Zero) - permits upgrades of existing stations and new allocations based on the reduced spacing protections, which will apply when Class C stations are converted to Class C-0.
Part 1 of our Special Report.