HDTV Antenna
HDTV Antenna & How to Use
It
An antenna, whether it be a regular one
or that which they call as the high definition television
antenna, is a bit of metal that is designed to vibrate at a
frequency that is specific as well as be sensitive over a
frequencies set at a range. They are made to work in the
Very High Frequencies (VHF) or Ultra High Frequencies (UHF)
ranges or both. An antenna picks up any antenna bandwidth
transmitted by any station and transfers it to the television
set. A signal's content and its modulation define an
antenna's being high definition making it a high
definition television (HDTV) antenna.
While most people prefer to use indoor antennas because they
find it easier to install, there are great advantages to using
an outdoor antenna. It gets you better signal for better
quality viewing of the channels that you like to patronize.
Before mounting an outdoor HDTV antenna though, it is best
to start out first by making a plan on how to do the proper
installation. There is no sense in going up to the roof
or in your attic without knowing first what is best to be done
to get the highest quality in getting the best frequency
signals. Before going up to that roof, you have to asses
first on which direction and angle the antenna should face and
which proper spot should it be installed.
 Outdoor antennas could usually be installed on
the roof of your house or just in the attic. The
advantage of putting that outdoor antenna inside the attic
is you don't have to subject yourself to the danger of
being in such a precarious balance as being on the
roof. The downside to this is you won't be getting
the same quality of signal that you could get when the
antenna is installed on the roof.
Antenna installed in the attic could be disturbed by home
appliances that run through electricity as well as cables that
are located nearby and of course, materials for roofs.
Roofing made of metal aggravates the problem because it could
completely destroy the signal. As a metal shield cannot
be penetrated by radio waves, it cannot be received by an
attic-installed antenna. Because of this, mounting your
antenna on the roof top of your home is highly and strongly
recommended.
Just make sure that before using that ladder and climbing on
it to go to your roof to start mounting, safety measures have
already been taken especially with regards to the installation
and maintenance of an outdoor antenna. Be safe always and
see that the weather conditions is befitting the activity that
you are about to undertake. Being on a wet roof or ladder
pose a very high risk of slippage. To avoid hazards from
electric shock, never attempt to go near electrical power lines
in putting up your antenna.
If the kind of antenna that you
purchased is omni-directional, there is no need to find the
right direction to which your antenna should be aimed.
This is necessary for outdoor HDTV antennas that are
directional, though. These kind of antennas should be
pointed at the right direction for it to give you the best
signal. First, you have to figure out on which direction
your HDTV antenna is pointed towards. Most antennas'
directing elements gets radio waves that are coming towards
it. Directors of antennas should be aimed to the towers
that provide the signals. You have to find the towers'
direction from where you are so that you can set up your
antenna according to this direction. You could check out
AntennaWeb to get your areas' broadcasts as well compass
orientation that could direct you to the towers that transmits
the signals.
Setting up an antenna is also dependent on putting it on a
spot that is ideal for an outdoor HDTV antenna. The
perfect spot for the installation of such a device is that
where the line of sight between the transmitting towers and the
antenna has no obstructions. Although finding this spot
could be very rare, you could at least make sure that your
antenna is pointed away from the house of your neighbor or a
nearby tree. A UHF band signal could be blocked by just a
tree and cause reasonable attenuation on the signal of the VHF
band.
If you really want to get a better signal from your outdoor
antenna, then it is most advisable to set up at a higher
place. This is so because obstructions, whatever they may
be present potential signal blockage. This could cause
the certain stations' reception to be prevented and images that
are low in quality could be produced as well. Placing
your outdoor antenna on the highest possible point on your roof
gets rid of such problems.
Also take great care in avoiding the presence of metal on
your own roof 's parts or that of the roofs of your neighbor's
houses in the installation of your antenna. Any object
with metallic properties that is found at less than a distance
of a wavelength is already close enough to be a part of your
outdoor HDTV antenna. This alters the electrical
properties of your antenna such as its directivity, bandwidth
and resonance frequency. The acceptable distance between
your antenna and metallic objects should depend on the
frequency. On the UHF band, a three feet separation
distance is already enough but an estimated 5-8 times more than
this is needed on the VHF band, which is lower.
Cables for outdoor television antennas should be very
short. Energy of a radio signal is dispersed while it is
running along a cable making the loss of signal energy more
before the TV set is reached when a longer cable is used.
Once the antenna has been properly mounted, bear in mind to
reduce the length of cables running into your home from your
antenna. Cutting back on these cables will also help you
avoid outages that may be caused by anything that got snagged
on the excess length or by the cables being blown by the wind
out of the antenna.
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