NEC Spectraview 1990 Users Manual

	SPEC TRAVIEW	II 	- 	USER’S 	GUIDE 	|	1

Calibration
Question: How often do I need to calibrate my monitor?
Answer: The answer will depend on how critical a color accuracy is necessary, how long the monitor is used per 
day,  environmental  conditions  and  the  characteristics  of  each  individual  monitor.  Some  users  working  in  highly 
critical color applications may calibrate their displays every couple of days. Others may only need to do it once a 
month.  The  recommended  and  default...

	 |	SPEC TRAVIEW	II 	- 	USER’S 	GUIDE

Question: Each time I calibrate my monitor I receive a different Delta-E result. Should I recalibrate again if I receive 
a value that is high?
Answer: For Delta-E values of less than 2 there is almost certainly no need to recalibrate. For values higher than 3 
it is important to understand what the cause is, and if it is significant. 
The  calibration  and  adjustment  process  has  inherent  variability  due  to  many  factors  such  as  the...

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Installation and Setup
Problem: Calibrate button is disabled.
Solution: The calibrate button is disabled for either of the following reasons:
No supported calibration sensor was detected.
No supported display monitor was detected.
See the following sections for further explanations. 
Problem: No supported monitor was detected.
Solution: 
Verify that the display monitor connected is a model supported by Spectra\
View II.
If more than one video output is...

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Problem: No supported calibration sensor was detected. 
Solution: 
Try reconnecting the calibration sensor and click the Auto Detect button in the Preferences dialog 
to re-detect the sensor. 
It may be necessary to close and re-launch the SpectraView application. 
(ÿ Windows) It may be necessary to install the drivers for the color sensor device.\
 Note that only 
the drivers for the X-Rite iOne devices are installed by the SpectraView setup application....

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Using SpectraView with NaViSet Administrator ( ÿ Windows version only)
The  SpectraView  II  software  integrates  with  the  NEC  DISPLAY  SOLUTIONS NaViSet Administrator  software  to 
provide remote administration of  the display monitors on networked machines. NaViSet Administrator will report all 
of the current SpectraView settings and the current calibration status within the NaViSet Administrator Console 
application. 
When  using  the Single...

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9	
Test	Pattern	Guide
The SpectraView II software includes several test patterns that are useful in evaluating the monitor calibration. It is 
also good practice to use the Test Patterns to quickly visually verify the integrity of the calibration\
. 
A  pattern  based  on  the  DICOM  TG18-GC  test  pattern  has  a  number  of  useful  features  that  allow  very  detailed 
analysis  of  the  monitor  grayscale  performance  in  one  pattern.  The  main...

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Glossary
Achromatic – Neutral in color (having no hue).
Additive Primaries – Red, green, and blue light that when combined in different relative inten-
sities produces different colors. (See also Subtractive Primaries)
Backlight – the internal light source for a Liquid Crystal Display, such as fluorescent lamps or 
array of LEDs (Light Emitting Diodes).
Blackbody – A hypothetical object that absorbs all incident radiation, thus any radia\
tion (e.g....

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Color Separation – The separating of a color image into the cyan, magenta, yellow, and black 
color layers used for printing.
Color Separation Tables – A set of conversion tables used to calculate the separating of RGB 
images into the CMYK layers necessary for printing.
Color Space – A three dimensional representation of colors. Examples are RGB, CIE xyY, and 
CIE Lab.
ColorSync – The Color Management System built into the Macintosh Operating System (\...

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Gamma – The relationship between the input video signal to a display monitor and\
 the screen 
output luminance. Typically the screen luminance follows a mathematical power function of t\
he 
input video signal, the exponent of which is called the gamma.
Gamut – The range of colors that can be reproduced on a particular device such a\
s a monitor 
or printer, or that can be distinguished by a sensing device such as a scanner or \
the human 
eye.
Hue –...

0	 |	SPEC TRAVIEW	II 	- 	USER’S 	GUIDE
PAL – Phase Alternation by Line. A standard for encoding video signals used in Western Eu-
rope and parts of Asia.
Phosphors – Materials that emit light when struck by radiation of certain wavel\
engths.  CRT 
displays use phosphors that give off red, green, and blue light to display an image on the 
screen.
Profile – A file containing a description of the color characteristics of a device such as a moni-
tor, printer, or scanner.
Refresh Rate – The number of...