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Free Satellite TV -- Is It Really Free?
You've seen the online and offline ads -- "Free satellite TV!" "Get a 4-room Satellite TV System Free!" and "Satellite TV Dish and Receivers Absolutely Free!"
But is satellite TV really free?
The answer to that question is yes ... and no.
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Important steps in installing a satellite dish
Important Steps in Installing a Satellite Dish
With the recent breakthroughs in the communication world, DSL connection has already become a household term. It has already been launched in various areas across the world; however, obtaining a...
In response to Bill Gates Letter -The Next Sea Change
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Satellite Dish for Apartments, Condo's & Townhouses
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The Science Behind Satellites
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Digital Projection in Your Home Theater
A projector is a device that integrates a light source, optics
system, electronics and display(s) for the purpose of projecting
an image from a computer or video device onto a wall or screen
for large image viewing. There are hundreds of products
available in the market and they are differentiated by their
resolution, performance and features. These devices can be
attached to a computer or video device just as you would connect
a traditional monitor.
The term "big screen" is used to indicate a TV size larger than
40 inches in diagonal measurement. Until recently these are
usually rear-projection screens, although we are seeing more and
more flat-panel displays at competitive prices.
The appeal of Rear-Projection TV (RPTV)
There certainly is a great deal of consumer appeal for RPTVs
these days. And it's easy to understand. Part of it is due to
the simplicity of the product. After all, what could be easier
than getting a bigger TV? If you want a larger image with no
muss and fuss, it can be purchased from any local big-screen
retailer and delivered within a day or two.
Another the appeal of RPTVs is the impression created by
big-screen retailers that RPTVs are cheaper than front
projection systems.
Clearly there is a market for both types of home theater
solutions. From a practical perspective your room size has a lot
to do with determining which approach is best for you. If you
don't have a large viewing room, a 40" to 60" diagonal TV will
probably be plenty. In this case, the rear-projection solution
is more practical assuming you can fit the box into the space.
But if you want the large screen cinema experience and your room
size will allow it, front projection is the way to go. Front
projectors are made to produce screen images in the range of 70"
to 120" diagonal or more. Once people realize they can get a
picture up to four times the size for the same money as a good
RPTV, it opens up a whole new world of entertainment
possibilities.
How good is the Rear-Projection TV:
As noted above, the advantages of RPTVs are obvious. There is a
wide array of products in different sizes and price ranges.
There are usually several local showrooms in most areas. And
they are simple to buy and install.
However, RPTVs have several limitations that front-projection
systems do not. Among them are limited screen size, poor viewing
angles, excessive reflections, poor aspect ratio management, and
loss of floor
space.
Screen size is an obvious difference, but still worth thinking
about for a moment. A 100" diagonal front projection screen is
four times the surface area of a 50" RPTV. If you want to put
real "theater" in your home theater, the projector and movie
screen approach delivers it. RPTVs are just big televisions.
Digital Projectors
A digital projector is an electro-optical machine which converts
image data from a computer or video source to an image which is
then displayed on a distant wall or screen using a lens system.
A typical resolution for a portable projector will be the SVGA
standard (800×600 pixels), with more expensive devices
supporting XGA (1024×768 pixels). The cost of a device is not
only determined by its resolution, but also by its brightness.
For use in large conference rooms the brightness should be
between 1,000 and 4,000 ANSI lumens.
There are four competing digital projection technologies: high
intensity CRT, LCD projectors using LCD light gates, Texas
Instruments' DLP technology and LCOS or liquid crystal on
silicon. In 2004 and 2005, LCD front projection has been
enjoying a come-back because of the addition of the dynamic iris
which has improved contrast up to the levels of DLP.
There is a genuine market for both RPTVs and projectors for home
theater. RPTVs are simple, but they have limitations in screen
size and performance. Projectors and screens require some
installation work, but once it is done you end up with a more
dramatic theater experience.
The bottom line is this: if you are looking at digital RPTVs and
your viewing room can accommodate a 90" or 100" screen, don't
overlook the possibility of a projector and screen instead. If
you can afford a digital RPTV, you can afford a projector. And
dollar for dollar the projector will often deliver the maximum
"wow" factor for the money invested.
----------------------
Mitchell Medford is an author and product consultant for several
consumer electronics manufacturers and satellite tv providers,
including Dish
Network. Visit his website for more information on home theater, LCD TVs,
and plasma televisions.
About the author:
Mitchell Medford is an author and product consultant for several
consumer electronics manufacturers. Visit his website for more
information on home theater, LCD TVs, and plasma televisions:
http://www.newtechnologytv.com
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