Update on Televisions
or
Why Do They Keep Changing So
Fast?

Just when we think that we have completely
understood the technology about television monitors, it seems that something
new comes along and we have to learn more and buy more stuff to keep our
signals up to the latest technology. With the advent of HDTV and new
technology almost everyday, here's more information about the latest in
televisions.
First of all, for those of us who thought that
we had to upgrade to HDTV pretty soon, here's a piece of useful
information: The original date for conversion to HDTV by broadcasters was
December 31, 2006. What we were told was that by Act of Congress,
broadcasters had to stop broadcasting in analogue by that date. Since less
than 85% television users had converted to HDTV, the date has been changed to
December 31, 2008. Supposedly on that date, broadcasters will go off
the air with conventional signals. In order to watch television, you will
have to be a) on cable, b) hooked up to a satellite system or c) have a
convertor box. Over the next couple of years, expect that most broadcasters
will have many more HDTV shows on, and more stations will be HDTV compatible.
Expect big changes before 2008.
At the moment:
1. Free HDTV signals are available wherever
signals are present in the US. In order to receive such signals, you will
need to have an HDTV compatible TV, HDTV tuner, UHF/VHF antenna.
2. About 65% of cable operators at the moment
provide HDTV programming. For that reception, you'll need the HDTV compatible
set, an HD compatible box for "Digital Cable Ready" TV with a CableCard slot
and card. Of course, you'll have to pay for cable.
3. Satellite providers are beginning to
distribute HDTV programming. Of course, you'll need the HDTV set, HDTV
receiver (not all satellite receivers are HDTV) and an HDTV dish (not all
dishes meet this requirement). Again, you'll have to subscribe to a satellite
service.
Digital televisions are not all the same. Here
are four types of digital sets:
EDTV: These are Enhanced
Definition, usually flat panels or LCD models. They can provide a 480p
picture, about the same as DVD quality but not true HDTV.
HDTV-ready: Such a set can
display the full digital 720p or 1080i HD signal, but don't include a tuner
for receiving HDTV signals.
HDTV: This type of unit can
read and display over-the-air HDTV (assuming you have the appropriate
antenna).
Digital Cable Ready: These
have a CableCARD slot to allow you to receive HDTV (Details from your cable
provider).
Our past article about the various types of
screens and resolution pretty much covers the current spectrum, however,
resolution is getting better and here are the new viewing distances for
HDTV-capable TVs, particularly important in a coach:
Screen Size
Viewing Distance
30"
3 3/4 ft-6 1/4 ft.
34" 4 1/4 ft - 7 ft.
42"
5 1/4 - 8 3/4 ft
50"
6 1/4 ft -101/2 ft
56"
7 ft - 11 3/4 ft
62"
7 3/4 ft - 13 ft
70" 8 3/4ft - 14 3/4 ft
(All this is dependent upon signal quality)
Some tips:
First of all, if you are going to make the leap
into a new monitor/television, stick with the name brands. Picture quality is
directed related to construction quality and internal components.
Over-the-road use is the toughest challenge to this new technology and you
want the best.
Secondly, there is no such thing as having too
many inputs. Four major types (and these should be detailed on any TV) are
Component video, DVI, HDMI and IEEE 1394. A standard computer input wouldn't
be the worst thing in the world to have as well. Some coach owners like to
have their GPS signal displayed on the overhead monitor (when possible) so
that's worth a check out before choosing a unit.
Accessories:
Three key accessories are worth an investment
up front. Here they are:
Calibration DVD: The Avia
disc is considered to be one of the best calibration DVD's out there. Most
TVs are set at the factor with brightness and contrast too high for use, and
for plasma sets, will diminsh the life of your new investment. Get your set
calibrated and extend both your viewing pleasure and use of the instrument.
High Quality Video Cabling:
If you get cables with your equipment, throw them away. They're cheap and
don't transfer signal at the rate that higher quality custom cabling does.
Get the good stuff up front and you won't be sorry later.
Line Conditioner: All TV
receivers produce cleaner images when they're fed with cleaner power,
especially non-tube displays. Lamp-based projection sets should have both a
line conditioner with battery back up.
For many of us, the old idea of 'adjusting the
rabbit ears' is a thing of the way distant past. It won't be long before we
all have to upgrade, modify or rethink what our AV systems are like in
coaches; what coaches are offering when we look at a new one. This article
(written October 2005) is just another marker in the continuing trend toward
better and more lifelike reception of the signals floating around in the air.
There will come a day, if we don't make the needed changes, that we turn on
the old set and we get DARK. The time's are coming to make
changes if we haven't done so already to keep up with the technology that's
running hard and fast.