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			About device calibration
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				About device calibration
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				<div><p>
                        
                        During the initial device emulation
(that is, Emulate Performance is not checked), the Emulator tab
runs with full desktop or laptop speed. To accurately emulate device
performance, calibrate each device on the Emulator tab.</p>
<p>To calibrate the device, the Emulator tab runs a test application
and compares the test result with the result stored in the database,
which was obtained by running the same test application on the actual
device. Device Central derives an index number based on the comparison.
This enables Device Central to know how much to slow down the desktop
or laptop computer to emulate the device. It also gives Device Central
a way to group devices into Performance Index categories. The categories
let you compare device performance (i.e., a high index number indicates
a high-performing device). Player version, display size, heap size,
monitor size, and the computer's memory consumption all affect the calibration
result.</p>
<p>Most of the Performance options, except for Rendering and Calibrate,
remain disabled for any device that is not calibrated. After you
perform the first calibration for a device, all performance options
are enabled for that device. </p>
<p>To achieve accurate emulation results, perform device calibration
frequently because other processes running on your computer affect
performance. </p>
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