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The word monitor
means different
things to different people and it is important for the teleprompter
operator
to be very clear about these differences to all parties involved. Many
laptop computers have the capability of sending a signal to a large
computer teleprompter monitor. The logic for this is that the screen of
the laptop
is
small compared to the various sizes of computer teleprompter monitors that are
available
and the larger monitor is easier to read, and has more screen real
estate.
Not all laptops will drive all sizes of computer monitors. Computer teleprompter monitors
are identified by various terms such as EGA, VGA, SVGA, or MultiSync.
You
must carefully check the laptop's capabilities with that of the larger
computer monitor that is to be used.
A computer prompter monitor
is not a TV set. However, you will see TV's advertised as also having
video monitor
capabilities. What this means is that the video and audio signals
coming
out of a VCR (video cassette recorder) can be plugged directly into the
video and audio jacks of the TV and the signals do not have to got
through
the tuner section of the TV. Theoretically the output will appear
a little sharper on
the TV screen. Of course the VCR has a tuner which can be used to
present
broadcast information to the television set. The purpose of the VCR
having
a tuner is to permit you to select whatever channel you choose to
record.
All of the above
was to get
you mentally prepared to realize that if you are going to use NTSC,
also
known as composite video monitors, or a TV set called a
monitor,
you are going to have to use a converter that takes the computer signal
and changes it so that the information can be viewed on the composite prompter video
monitor. The composite prompter video monitor is the type that is most
frequently
used as the remote monitor that the talent is reading. NTSC, National
Television
Standards Committee, is the television standard for North America and
some
other countries.
A color
teleprompting monitor
is not required
or necessary unless the teleprompter software has features that can
be
enhanced by color. A monochrome teleprompting monitor will generally be
sufficient
and
will probably be less expensive. Two inexpensive sources of composite
video
monochrome teleprompting
monitors
in the used equipment market are the Apple
//e
and //c computer monitors of the size of 12" and 9" respectively. These
are out of production but are readily available at used computer
equipment
stores. They have a green phosphor, which presents black alphanumerics
on a green field, and this helps prevent secondary reflections from the
camera lens which is behind the reflective surface of the teleprompter.
Another source of monochrome composite video teleprompting monitors is from
security
surveillance equipment providers. These monitors will be black and
white
and they may have controls that permit moving the image around the
screen.
If you are using
a desktop
computer instead of a laptop, the converter must be capable of also
putting
out the correct computer signal that will drive the computer teleprompting monitor
that
you normally use with your computer. For clarification let us follow
the
computer signal. The appropriate cables required are usually supplied
with
the converter. The signal comes out of the computer and into the
converter.
The signal is then sent out of the converter in two different forms.
One
is the computer signal for the computer monitor and one signal is
the
composite video signal for the talent monitor. Unfortunately all
converters
will NOT drive all the varieties of computer
monitors,
so careful checking of specifications for compatibility between the
monitor
and the converter is required before purchasing the converter. There is
one additional monitor feature that must be considered and that is the
ability to reverse the image.
Whenever an image
is reflected, it is reversed. If the image from the teleprompter
monitor
were reflected twice, it would read right side up to the talent. There
have been teleprompters in the past that used two reflective surfaces
to
present to the talent, a right side up reading image thus avoiding the
problem of having the talent monitor reflecting a reversed image and
avoiding
the problem of providing a teleprompting monitor that has a switch on it that can
reverse
the image. If you are working in a broadcast studio environment, the
monitors
used will probably have a switch that permits you to toggle the image
from
right side up to reverse. If you are using a desk top computer, you
will
need this feature on the remote talent monitor to reverse the image to
accommodate the fact that the reflective glass in the teleprompter
reverses
the image. Technically speaking, this changes the "fly back" of the
electron
beam that creates the image on the phosphor surface on the inside of
the
tube. The source of this switch able type of monitor would be a
television
industry supply firm. Finally, you may find a television technician who
understands the problem and who can rewire a monitor and install the
switch.
As this is being
written
in 1997, we are now starting to see flat panel displays appear as
monitors
in teleprompter hardware. The more common flat panel displays use
active
matrix, passive matrix, liquid crystal display or electroluminescent
technologies.
The advantage of these displays is a great reduction in weight compared
to the glass tubes used in current monitors.
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