NEC Spectraview 3090 Users Manual

							11	 |	SPECTRAVIEW	II 	- 	USER’S 	GUIDE
2	
Dialogs,	Se\f\fings	an\b	Menus
Main SpectraView II window
The SpectraView II window shows the current settings and status of the display calibration. All of the features of 
SpectraView are accessed from this window and the menus.
Edit Target
Opens the Calibration Target 
Configuration dialog box used to 
modify Target settings.
Open Previous Monitor 
Calibration 
 Previous calibrations can 
be loaded and viewed. 
The display settings and 
ICC/ColorSync profile 
for the display will be set 
automatically.
Display listbox
Selects which display to 
calibrate if more than one 
display is present. 
Targets listbox
Selects an existing 
Target setting. 
Targets that have 
been calibrated have 
green check mark.
Calibrate 
Calibrates the currently 
selected display to the 
currently selected Target 
Settings.
Calibration On 
Turns the display 
calibration on or off.  
Open Target 
Opens a Calibration Target 
file.
Save Target 
Saves the current Target 
Settings to a Calibration Target 
file.
         
						

							12	 |	SPECTRAVIEW	II 	- 	USER’S 	GUIDE
Target Settings
The Target Settings group shows the current calibration Target parameters for the currently selected display 
monitor. The Target Settings can be modified, saved and loaded using the Edit, Open and Save buttons. 
The  Target  listbox  shows  all  of  the  available  Targets.  When  the  display  has  been  calibrated  to  a  particular 
Target, a green check mark appears next to the Target name, indicating that the calibration is available. Different 
calibrations can be automatically restored by selecting different Targets that have been calibrated. This makes 
it  easy  to  quickly  change  between  different  calibrated  Target  settings.  The  green  check  mark  will  change  to 
yellow once the calibration for that Target has passed the recommended recalibration time, indicating it is time 
to recalibrate that particular Target.
White Point shows the Target White Point.
Gamma shows the Target gamma or Tone Response Curve type.
Intensity shows the Target display intensity value.
Contrast Ratio shows the Target contrast ratio. 
Color  Gamut  shows  the  Target  color  gamut  for  display  models  that  support  gamut  adjustment.  This  will  be 
grayed out if the currently selected display does not support color gamut adjustment.
Calibration
The Calibration  group  shows  the  current  calibration  status  of  the  currently  selected  display  monitor  and  is 
where the monitor calibration process is started. 
The display monitor can be calibrated to the current Target Settings by clicking the Calibrate button. Note that 
this Calibrate button will be disabled if either no supported color sensor or display monitor was detected. See 
the Troubleshooting section for more information.
Status  shows  the  current  calibration  status  of  the  display  monitor,  either Calibrated, Uncalibrated,  or 
Calibration Off. 
Last shows the date and time that the display monitor was last calibrated.
Next Due shows the number of days until the display is next due for recalibration, or the number of days past 
when  it  was  last  due  for  recalibration.  This  is  based  on  the  date  of  last  calibration,  and  the Recalibration 
Reminder Period in the Preferences dialog. 
If the display is not currently in a calibrated state the Calibration On checkbox will be unchecked. If the monitor 
OSD  controls  are  locked  using  the Lock  OSD  Controls  option  in  the Preferences  dialog,  the  OSD  controls 
will  be  automatically  unlocked  when  the Calibration  On  checkbox  is  cleared.  Selecting  the  checkbox  will 
automatically re-configure the display monitor to its previously calibrated state.
The Open button will open the Previous Monitor Calibration dialog which shows all of the previous calibrations 
that  have  been  performed.  It  is  possible  to  view  the  detailed  results  of  each  calibration,  as  well  as  manually 
selecting a previous calibration to load. Loading a previous Monitor Calibration will automatically configure the 
display and re-generate the ICC/ColorSync profile, if one was generated when the calibration was performed. 
This feature can be used to manually switch between different monitor calibrations with different Target settings, 
or to restore a particular calibration.
Note: The Monitor Calibrations are specific to each individual display monitor and can not be used to load the 
calibrated settings of one display monitor into another, even if they are the same model. This is because of the 
individual tolerances and characteristics of each display monitor .
Display
The Display  group  is  used  to  select  the  display  monitor  to  calibrate  if  more  than  one  display  is  present  on 
the system. Displays can be selected from the listbox and the Target Settings and Calibration status will be 
  
						

							13	 |	SPECTRAVIEW	II 	- 	USER’S 	GUIDE
This Display  Configuration  dialog  is  accessed  either 
from  the Edit  menu,  or  by  clicking  on  the Display: 
Configure button in the main SpectraView window.
If  more  than  one  display  is  being  used  on  Windows,  it 
may be necessary to manually configure the relationship 
between the display layout on the Windows desktop, and 
the  display  monitors  that  are  connected  to  the  system. 
Correct  configuration  of  this  relationship  is  necessary 
so  that  the  display  monitor  adjustments  are  sent  to  the 
correct  monitor,  and  that  the  calibration  is  performed  on 
the correct part of the desktop.
A  diagram  depicting  the  display  desktop  layout  is  shown 
and  the  display  monitors  associated  with  each  desktop 
screen  is  shown.  The  monitor  associated  with  each 
display can be selected using the listboxes.
Clicking on the display rectangles will also select different 
displays on the Windows desktop. 
If a USB connection is made to the display (MultiSync PA 
Series  only),  the  USB  connection  will  be  shown  and  can 
be selected instead of the DDC/CI connection.
Note:  Some  video  graphics  adapters  may  show  several 
duplicate displays due to issues with the video drivers for 
that  adapter.  In  this  case  the  duplicate  displays  can  be 
selected to “None”.
Auto  Configure  -  Attempts  to  automatically  detect  and 
configure  the  display  monitors  to  the  display  layout  on 
the  Windows  desktop.  In  most  cases  this  will  correctly 
configure  the  correct  relationship,  but  in  some  cases  it 
may be necessary to manually configure. 
Test  LUT  -  Tests  that  the  video  graphics  adapter  card 
LUT  (Look  Up  Table)  can  be  correctly  set.  Clicking  this 
button with flash the screen brightness by setting the LUT in the video graphics adapter card for the currently 
selected display. Verify that the correct screen flashes when this button is clicked. 
Note:  Since  SpectraView  applies  all  correction  curves  to  the  10  or  12  bit  LUT  inside  the  monitor,  the  video 
graphics adapter card LUT is always set to linear. 
Test Monitor - Tests the communications with the currently selected display monitor. Clicking this button will 
send a command to flash the monitor’s screen brightness.  If the wrong display monitor flashes then change 
the monitor associated with each display can be selected using the listboxes.
Display C\fnfigurati\fn dial\fg ( ÿ Wind\f\bs versi\fn \fnly)
automatically updated. Note that Target Settings are independent 
for each monitor when multiple monitors are used, so each display 
monitor can be calibrated to different Target settings if desired.
Display Configuration button  (ÿ Windows version only) opens 
the Display  Configuration  dialog  which  is  used  to  configure 
SpectraView  II  if  more  than  one  display  is  used  on  the  system. 
See the following section.
   
						

							14	 |	SPECTRAVIEW	II 	- 	USER’S 	GUIDE
Edit Calibrati\fn Target C\fnfigurati\fn dial\fg
The Edit Edit Calibration Target dialog is accessed by clicking the Edit Target button on the main SpectraView 
II window, or by selecting Target from the Edit menu. Custom Targets can be created using this dialog. After a 
new Target has been created, the display must be Calibrated to it. It is possible to share Target files with other 
users of SpectraView on both Windows and Mac OS platforms.
White Point
White  Point  selects  the  Target  white  point  for  the  calibration. 
Several popular industry standard White Point values, such as 
D50 and D65, are provided. 
A Native option is available that can be used to leave the White 
Point  at  the  display’s  native  characteristic  white  point.  This  is 
useful  when  the  maximum  possible  luminance  is  desired  but 
the white point is not critical.
A  custom  white  point  can  be  specified  by  clicking  the Edit... 
button to open up the Custom Color Temperature dialog.
Gamma Curve
Gamma Curve selects the desired tone response curve of the calibrated display . Options are:
•	Monitor Native Gamma - No correction is applied and the display’s Look Up Tables are set to linear.
•	Gamma Curve Value - The response curve will follow a simple gamma curve. Values between 1.0 
and 3.0 can be entered. A gamma value of 2.2 is the most popular for most applications.
  
						

							15	 |	SPECTRAVIEW	II 	- 	USER’S 	GUIDE
•	DICOM Curve - The response curve follows the DICOM (Digital Imaging and Communications in 
Medicine) specification. This response curve is aimed at medical use, however it can be used for other 
applications. The goal of the DICOM response curve is to have a visually linear display response. 
Use  Scale  Factor -  The  DICOM  response  curve  shape  is  based  on  the  measured  black  level  and 
Intensity. If the black level or Intensity of the display changes, then the shape of the DICOM response 
curve also changes. If a display is not expected to be re-calibrated for a period of several months, this 
feature can be used to increase the longevity of the DICOM calibration using the knowledge that the 
displays  brightness  will  decrease  slightly  as  it  ages.    By  scaling  the  black  level  and  Intensity  values 
used to calculate the DICOM response curve, using the Use Scale Factor value, the response curve 
can be based on the lower future black level and Intensity. The value used will depend on the display, 
its usage, and the time interval until it is expected to next be re-calibrated. 
•	Custom Curve - Advanced and custom response curves can be selected from presets or created by 
importing a table of values. Click the Edit... button to open the Custom Gamma Curve dialog. 
Intensity
The Intensity selects the luminance or “brightness” of white for the calibration. Options are:
•	Maximum possible - calibrates the display to the maximum possible luminance that it can achieve. 
The actual value achieved will depend on the display’s type, its age and the white point used. This is 
not recommended when trying to exactly match two or more displays, since there may be a dif ference 
between what Intensity each display can achieve.
•	Specific Level - calibrates the display’s Intensity to a specified target value. If the display can not 
achieve the specified value, it will be calibrated to the closest possible Intensity, and a message will be 
displayed after the calibration has completed.
Note: If you are unsure about what level to use for the Specific Level for a particular application, it is possible 
to interactively adjust both the White Point and Intensity using the Visual Match feature in the Custom White 
Point dialog. 
Contrast Ratio
Contrast  Ratio  allows  a  particular  contrast  ratio  to  be  used 
if  necessary.  The  contrast  ratio  is  the  ratio  of  white  to  black 
luminance. 
Selecting Monitor  Default  will  calibrate  the  display  to  the 
highest possible contrast ratio, which is limited by the display 
technology,  the  selected  White  Point,  Intensity  value,  and 
other factors. 
In some applications, such as simulating low contrast images 
such as in newsprint, it is useful to have a lower contrast ratio 
than the display’s native value. Contrast Ratios in the range 
of 50:1 to 500:1 can be selected. 
Note: If the selected contrast ratio is higher than what the display is actually capable of achieving, then the display 
will calibrate to the highest possible contrast ratio. If a specific Contrast Ratio is selected, it is recommended 
that the number of Calibration and Measurement Steps be set to at least 32 in the Preferences dialog. 
  
						

							16	 |	SPECTRAVIEW	II 	- 	USER’S 	GUIDE
Color Gamut
Color  Gamut  allows  a  particular  color  gamut  to 
be  selected  if  the  display  supports  color  gamut 
adjustment.  The  color  gamut  is  the  range  of  colors 
that can be displayed by the monitor, and is defined 
and  bounded  by  the  red,  green  and  blue  primaries 
which together make up all other colors. 
Note:  Depending  on  the  display  model,  this  control 
may be disabled or limited to Native and sRGB. 
For  advanced  models  such  as  the  MultiSync  PA 
series,  the  color  gamut  can  be  fully  controlled  and 
customized,  and  the  internal  SpectraView  engine 
will manipulate the primary colors in order to display 
different colorspaces.
Several preset Color Gamuts are available in the list, or a custom gamut can be created. Click the Edit.. button 
to open the Custom Color Gamut dialog.
By using the Native (Full) setting, the color gamut will be that of the LCD panel which will result in the widest 
possible color gamut. Use this setting if you are using color managed applications such as  Adobe Photoshop 
which use a Color Management System to correctly convert colors for display.
Examples of typical usage scenarios when using a non-native color gamut can be beneficial:
Video  Editing: When editing video in an application that is not color managed. In this case the video is 
typically encoded and intended to be viewed on a display that either has SMPTE-C or ITU-R BT.709 color 
primaries.  Since  the  video  editing  application  is  not  color  managed,  no  color  conversion  is  made  between 
the colorspace of the encoded video, and that of the display. If the display was set to the Native color gamut, 
video  images  would  appear  over-saturated  because  they  are  being  displayed  directly  on  the  wide  color 
gamut display without any kind of compensation. By setting the Color Gamut of the calibration Target to that 
of the encoded video, the display will handle the color conversion that would have normally been done if the 
video was color managed, and will be displayed correctly without being over-saturated.
Web Viewing: When viewing web pages using a web browser application and system that are not color 
managed, images and graphics would otherwise appear over-saturated since they were probably intended 
to  be  viewed  on  a  typical  sRGB  gamut  display.  In  this  case  using  the  sRGB  Color  Gamut  as  a Target  will 
assign  the  display  to  handle  the  color  conversion  so  it  appears  to  be  an  sRGB  colorspace  display,  even 
though it is actually a wide color gamut LCD panel.
  
						

							17	 |	SPECTRAVIEW	II 	- 	USER’S 	GUIDE
The Custom Color Gamut dialog is accessed by clicking the Edit.. button in the Color Gamut section of the 
Edit Calibration Target dialog. 
Note: This feature is only available on MultiSync PA series models.
The  color  gamut  of  the  monitor  can  be  altered  by  changing  the  positions  of  the  red,  green  and  blue  primary 
colors. This can be done by either clicking and dragging the positioning controls on the CIE xy diagram, or by 
modifying the CIE xy values for each primary color. 
The native color gamut of the monitor is shown as a yellow triangle on the CIE xy chromaticity diagram in the 
dialog. This  triangle  represents  the  limits  for  displayable  colors,  and  colors  outside  it  can  not  be  represented 
correctly by the display.
The LCD panels used in the NEC MultiSync PA Series (except the PA231W) are known as wide color gamut 
panels, meaning they can display a much wider range of colors than typical monitors.
However, for some applications, it is not desirable to use such a wide color gamut, and in these cases, the Color 
Gamut control can be used to manipulate the color gamut size and shape.
In other instances it is desirable for the monitor to behave as though it has an even larger color gamut than it 
actually  has.  In  this  case  colors  that  lie  outside  the  displayable  range  of  the  LCD  panel  will  be  automatically 
converted  to  the  nearest  displayable  color.  An  example  is  the  DCI  colorspace  used  for  Digital  Cinema 
applications. Parts of this colorspace lie outside the range of displayable colors, but it is still advantageous to 
have the display appear as DCI color gamut for all of the parts of the colorspace which lie within the displayable 
color range.
Advanced  Note:  When  the  Color  Gamut  setting  is  set  to  anything other  than Native,  the  ICC/ColorSync 
profiles  generated  by  SpectraView  will  automatically  use  the  color  primary  chromaticity  values  calculated  by 
the  display’s  internal  SpectraView  engine,  rather  than  measurements  taken  by  the  color  sensor if  the  current 
Source  of  primary  color  chromaticities  for  ICC  Profile  setting  in  the Preferences  is  set  to Automatic 
(default). This  feature  allows  the  use  of  color  gamuts  that  are  larger  than  that  which  the  display  actually  has, 
and encodes the correct color primary chromaticity values within the ICC/ColorSync profile, even though they 
may not all be actually be displayable and measurable. 
If  desired,  this  behavior  can  be  changed  by  selecting Calibration  Sensor in  the Preferences,  however  note 
that if a color gamut larger than that of the display is used, the color primary chromaticity values within the ICC/
ColorSync profile will not correctly represent the Target color gamut. 
Cust\fm C\fl\fr Gamut dial\fg
  
						

							18	 |	SPECTRAVIEW	II 	- 	USER’S 	GUIDE
Cust\fm Gamma Curve dial\fg
The Custom Gamma Curve dialog is accessed by clicking the Edit.. button in the Gamma Curve section of 
the Edit Calibration Target dialog.
Advanced response curves can be selected from presets or custom curves can be created by importing a table 
of values.
The following preset curves are available:
•	sRGB - A curve based on the sRGB specification that includes the offset, transition and slope 
components.
•	L* - A curve based on L* in the Lab specification. The L* curve is intended to be more perceptually 
uniform than a simple gamma value curve.
•	NTSC Video - A curve based on the SMPTE-170M specification for NTSC that includes the offset, 
transition and slope components.
•	SMPTE-240M - A curve based on the SMPTE-240M specification for 1125 line HD video that includes 
the offset, transition and slope components.
Custom  curves  can  be  created  and  imported  into  SpectraView  by  creating  a  text  file  with  a  list  of  numerical 
values. The text file must conform to the following specifications:
•	Must contain between 3 and 256 values.
•	Each value must be on a separate line. 
•	The first value must be 0.
•	Values must be monotonically increasing. 
When imported, the values will be automatically scaled and interpolated to create a  Target curve. 
  
						

							19	 |	SPECTRAVIEW	II 	- 	USER’S 	GUIDE
Cust\fm White P\fint dial\fg
The Custom White Point dialog is accessed by clicking the Edit.. button in the White Point section of the Edit 
Calibration Target dialog.
A custom White Point can be created by either specifying it as a Black Body radiator temperature in Kelvin, as 
CIE (xy chromaticity) Coordinates, or by interactive visual adjustment and measurement.
Values  between  2500K  and  10000K  may  be  entered  in  the  Black  Body  K  field.  The  corresponding  CIE  xy 
coordinates are automatically calculated and displayed for reference. 
CIE xy chromaticity coordinates can be entered by selecting the CIE Coordinates radio button and entering the 
x and  y values. The corresponding  correlated  black  body  radiator  temperature  and Δuv (Delta-uv)  values  are 
automatically calculated and displayed for reference. The Delta-uv value indicates how far the xy coordinates 
entered are from the black body radiator locus.
A  custom  White  Point  may  be  measured  using  the  calibration  sensor,  and  automatically  entered  in  the  CIE 
xy chromaticity coordinate fields by clicking the Measure button. This is useful for “cloning” the white point of 
another monitor. 
The color sensor can be placed over the white circle on the right of the dialog in order to take a measurement of 
the white point by clicking the Measure button. The circle can also be used to visually compare the white point 
to another reference such as a lightbox. If a larger area of white reference is needed, selecting White Screen 
Background will fill the entire screen background with white.
The luminance and color of the display can be interactively adjusted to visually match a reference if necessary.  
To interactively adjust the color of the display, click and drag within the color circle or use the arrow keys. Use 
the vertical slider control to adjust the Intensity. Specific Red, Green and Blue values can also be entered.
Once a visual match is found, the adjusted white point must be measured by clicking the Measure button and 
measuring  the  white  circle  with  the  color  sensor.  This  will  update  the  Target  white  point  values  with  the  new 
White Point values. 
  
						

							20	 |	SPECTRAVIEW	II 	- 	USER’S 	GUIDE
Preferences dial\fg
Preferences dial\fg - Calibrati\fn Sens\fr tab
Sensor Type - selects the model of calibration sensor to use, and shows the current model being used.
Auto-Detect - attempts to detect the selected model of calibration sensor. SpectraView will automatically detect 
the calibration sensor when the application is started, however if the sensor was not connected at that time, or 
if it was being used by another application, then it may be necessary to re-detect it.
Note:  If  the  sensor  was  not  attached  when  SpectraView  was  launched,  then  it  may  be  necessary  to  exit  the 
SpectraView application and launch it again.
Model and Serial # - shows the model and serial number of the currently selected calibration sensor device.
Average low light measurements - will average several color sensor measurements to improve the accuracy 
of  low  luminance  measurements  (below  10  cd/m²).  Selecting  this  option  will  increase  the  monitor  calibration 
time.
The Preferences dialog is accessed from the Edit menu (ÿ Windows) and SpectraView II  application menu 
( Mac OS). It is divided into 5 different tabs. 
The default settings for the entire Preferences can be restored by clicking the Defaults button.
Note: Due to the technology limitations of the color sensor compared to the human eye, for some applications, it is 
sometimes better to visually match a white point using this interactive method, and then measure it using the color 
sensor.