|
Date
|
Story title |
| (03.16.05) |
Feed Line
In the March 2 issue, author Buc Fitch discussed field intensity measurement methodology. Here, Cris Alexander expands on Fitch's discussion of ND surveys.
|
| (05.19.04) |
An Alternative
to Traditional STL
In the Coming Years, the ISM Band May Well Become a De Facto Broadcast
Auxiliary Band
|
| (08.13.03) |
Be
Militant About Reradiation
You Can Takes Steps to Protect AM Antennas Against Reradiating
Structures
|
| (02.12.03) |
FM
Systems: Open Your Eyes and Take a Look
In most cases, once a transmission line and antenna have been
installed on a tower, little thought is given them until something
goes wrong. |
| (02.01.03) |
Proper
Installation Ensures Long Life
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.
|
| (01.15.03) |
Finding
Suitable Transmission Line
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.
|
| (12.18.02) |
Rigid
vs. Semi-Flexible Line
In the case of FM antenna systems, there generally are two choices
for transmission line types: rigid and semi-flexible.
|
| (12.04.02) |
Rings,
Stubs and Rototillers
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." |
| (11.20.02) |
VSWR
Bandwidth, Friend or Foe?
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. |
| (11.06.02) |
Overshoots
and Close-In Coverage
In this segment, we will discuss methods of dealing with the problem
of overshooting the target coverage area and problems with close-in
coverage.
|
| (10.23.02) |
Antenna
Gain vs. Transmitter Power
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 ... This is the second in a series of articles about FM
transmission systems.
|
| (10.09.02) |
Understanding
FM Systems: A New Series
With this article, we begin an in-depth look at FM transmission
systems.
|
|
(03.01.01)
|
Shared Use of Transmitter Sites
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.
|
