Runco REFLECTION CL-510 Manual de usuario descargar pdf (Pagina 22)

TECH CORNER

22 ExtroNews 14.3 Fall 2003

The Next Step: Projector Setup

After reading “Optimizing Your Image with

Auto-Image”, you have probably noticed a startling

similarity between projector and scaler setup.

The two processes are closely related, because digital

displays such as LCDs, DLPs, and plasmas work in

much the same way as a scaler.

At the front end of a digital display, analog video

is sampled and stored digitally. The digital display also

reclocks the incoming signal to the native resolution

of its internal raster. These two steps are the same for

a scaler and a display device. Then, the process differs

as the scaler prepares to deliver a video signal and the

display prepares to convert its data to projected light.

Until that point, the two devices perform many of the

same functions.

As such, setting up size, position, clock, and phase

on a digital display is much the same process as

setting these parameters on a scaler. There will be

differences, however.

Some differences will come in the form of

nomenclature. What Extron calls “clock” another

manufacturer might call “tracking.” What Extron

describes as “adjusting vertical sizing” might be

designated by another manufacturer as “setting

the number of vertical lines.” Many manufacturers

have different names for the same thing.

One goal of “Optimizing Your Image with

Auto-Image” is to teach the concept of the feature

being adjusted. Once you understand the concept,

the different nomenclature should fall into place

by playing with the settings, seeing the effects on

the image, and thereby viewing what you are

adjusting, whatever you want to call it.

Other differences will be apparent in the way a

device makes adjustments. Take, for instance, the fact

that the Extron ISS 408 adjusts the horizontal size and

the clock using the horizontal size adjustment. Some

display manufacturers will adjust these parameters

with a single setting, others will have separate

adjustments: one for clock, another for horizontal

size. Again, understanding the concept will help you

make sense of how to conﬁgure the parameter.

Finally, it is important to note that setting up one

device does not eliminate the need to set up the other.

In the case of the ISS 408, set up the display device

ﬁrst using the internal test patterns of the ISS 408.

Once that is completed, you can set up the ISS 408,

typically without having to set up the display again.

Optimizing Your Image with Auto-Image (continued)

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• Auto-Image uses parameters calculated

from the actual video information present,

not arbitrary values set for signals that are

new to the scaler.

• Auto-Image is fast, easy, and requires

almost no training to use.

These facts make Auto-Image a useful

feature in a number of different scenarios.

During initial setup, Auto-Image can be used

to set up a scaler or scan converter. The set-

tings can then be tweaked if necessary and

saved to memory. During live events, Auto-

Image can be used to conﬁgure a scaler for a

new source on the ﬂy. And, it can be used any

time a scaler or scan converter is used with

sources that are new to the device, and where

no trained personnel is available to calibrate,

such as in a classroom environment where

different laptops are used every day.

To use Auto-Image to its best advantage, it

is important to know when other features,

such as recalling auto presets, will produce

better results. To understand why, let’s consid-

er some of the limitations of Auto-Image:

• When Auto-Image gets different

information, it delivers different results for

size, position, clock, and phase. This

happens because video information

changes with the image on the screen.

• Auto-Image is a feature limited by the

programming and processing power

of the machine that drives it. Despite

advances in processor speed and memory

storage, a scaler or scan converter is

still a machine.

• It can be thorough but not creative,

and it lacks the power to deal with the

unexpected, or to improvise. The human

eye and brain are unlikely to be matched

in this regard, and a trained A/V

technician will probably be able to

improve on most settings.

Because of these limitations, it is best in

most permanent installations to turn the

Auto-Image off after initial setup. Once an

image has been set, Auto Presets can be used

to recall those same settings. This will ensure

the right settings are called up every time the

device sees that signal. Auto Presets will

typically pull up an image faster, too.

The Auto-Image feature can still be used in

products such as the ISS 408 even after the

Auto-Image feature has been turned off by

forcing Auto-Image on a particular input. This

allows users to Auto-Image new sources even

when using saved auto presets.

The Bottom Line

Auto-Image is a useful calibration feature.

It delivers calibration of size, position, clock,

and phase adjustments at the touch of a but-

ton. While Auto-Image doesn’t deliver a per-

fectly calibrated image every time, it always

gets pretty close. This can save a technician a

little time and effort. It can also save an exec-

utive from uncomfortable moments in front

of a live audience.

That’s because Auto-Image does its job well

and fast, and it’s as easy as pressing a button.

So the next time you need to set up your scaler

or scan converter, try Auto-Image.

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