NEC Spectraview 3090 Users Manual

							Calibration  and  Profile  Steps -  selects  the  number  of  measurement  steps  to  take  when  calibrating  and 
profiling the display. A larger number of steps will generally result in a more accurate grayscale calibration, but 
will increase the calibration time. 32 steps is the recommended setting for most applications. 
Recalibration  Reminder  Period  -  sets  the  interval  after  the  display  is  calibrated  until  a  calibration  reminder 
message  is  displayed.  The  default  value  is  2  weeks.  Select Never  if  you  do  not  want  to  be  reminded  to 
recalibrate the display. 
Calibration Priority - selects the algorithm used to calculate the display’s response curve. Options are:
•	Maximize Contrast Ratio - will maximize the display’s contrast ratio by making black as dark as 
possible at the expense of grayscale color tracking near black. 
•	Best grayscale color tracking - will generate the best grayscale color tracking in the black areas, at 
the expense of a slightly reduced contrast ratio. This option will not be used if a calibration Target with a 
Contrast Ratio of other than Default is used.
Note: This setting does not have any impact on the calibration of the MultiSync PA series displays. 
Extended  luminance  stabilization  time  -  increases  the  waiting  time  for  the  display  to  stabilize  while  the 
luminance is being adjusted. This option can be used if necessary to increase the accuracy of the luminance 
adjustment  when  a  Target  with  a  Specific  Level  of  Intensity  is  being  used.  It  may  significantly  increase  the 
calibration time, and is normally only useful when a very low intensity value is used. Try selecting this option 
if the calibrated Intensity is significantly different than the Target value due to the display stabilizing during the 
calibration and profiling steps.
21	 |	SPECTRAVIEW	II 	- 	USER’S 	GUIDE
Preferences dial\fg - Calibrati\fn tab
  
						

							Preferences dial\fg - ICC Pr\ffile tab
22	 |	SPECTRAVIEW	II 	- 	USER’S 	GUIDE
Generate ICC Profile after calibration - selecting this will automatically generate an ICC/ColorSync monitor 
profile after the display is calibrated. This option should be checked for most applications.
Set  as  Windows  Color  Management  System  Monitor  Profile  (ÿ  Windows  version  only)  -  selecting  this 
will automatically associate the generated ICC monitor profile with the Windows Color Management System. 
This option should be checked for most applications.
ICC  Profile  file  name  -  selects  how  the  ICC  Profile  file  is  named  when  an  ICC  Profile  is  generated,  for 
example after calibration. 
•	Set Automatically - the profile will be automatically given a name and description.  This is the 
default setting as it is not normally necessary to manually name the profile file.
•	Prompt for file name and description - a prompt will appear and the file name and description 
can be entered manually.
Storage  Location  (  Mac  OS  only)  -  specifies  where  the  generated  ICC/ColorSync  profiles  are  stored. 
Options are:
•	Per User of this computer - the profile is stored in the User’s profile folder. Profiles in this folder 
are typically not accessible from other user accounts.
•	Shared by all users of this computer - the profile is stored in the shared profile folder that is 
accessible by all user accounts.
Source of primary color chromaticities for ICC Profile - selects what values are used for the Primary Color 
Chromaticities  that  are  encoded  in  the  ICC/ColorSync  monitor  profile. The  values  are  used  to  describe  the 
color gamut of the display.
  
						

							Preferences dial\fg - Interface tab
Options are:
•	Automatic - the optimal setting based on the color sensor model and the display monitor type is 
automatically used. It is recommended to use this setting. 
•	Calibration Sensor - uses the values measured by the calibration sensor. For normal color gamut 
displays this is the recommended option since the calibration sensor can accurately measure these 
primary colors. For wide color gamut displays some colorimeter based calibration sensors may not be 
able to accurately measure the primary colors and it is recommended to use the Factory Measurement 
option. For spectral based calibration sensors, either option can be used. 
•	Factory Measurements - uses the measurements taken during production of the display monitor to 
encode the color gamut information in the generated ICC Profile. These measurements may be more 
accurate than those of some color sensors when measuring wide gamut displays such as the P A241W, 
PA271W, PA301W, P221W, LCD2180WG-LED, LCD2690WUXi, LCD2690WUXi2, and LCD3090WQXi.
23	 |	SPECTRAVIEW	II 	- 	USER’S 	GUIDE
Luminance Units - selects the units that luminance values are displayed in. Options are:
•	Candelas (cd/m²)
•	Foot Lamberts (fL) 
Automatically  load  settings  on  Target  change  -  automatically  loads  the  most  recent  Monitor  Calibration 
Settings  when  a  different  Target  is  selected,  and  will  generate  a  new  corresponding  ICC  Profile.  Using  this 
option allows different Targets to be selected and the monitor will be automatically configured.
Confirm  display  calibration  status  each  time  application  is  launched  -  selects  if  the  current  monitor 
settings  should  be  checked  and  compared  with  the  settings  for  the  last  calibration  when  SpectraView  is 
launched.  If  the  monitor  settings  are  different  a  warning  message  will  be  displayed,  and  the  last  calibration 
settings can be reset. This checking operation will take several seconds each time SpectraView is launched. 
  
						

							Preferences dial\fg - Display tab
Lock OSD (On Screen Display) controls when calibrated - selects if the monitor’s On Screen Display control 
buttons are locked when the monitor is calibrated. Locking the controls can be useful to prevent accidental or 
unauthorized adjustment of the monitor once it is calibrated. Options are:
•	Don’t lock 
•	Lock all except Bright and Contrast
•	Lock all
Note: The controls will be unlocked if the calibration is turned off in the main window. 
Use Auto Luminance (if supported) - enables the Auto Luminance sensor circuit inside the display monitor 
to increase the Intensity (brightness) stability as the display ages and warms up. This feature will not be used 
for  Targets  with  “Maximum  Possible”  Intensity  selected,  or  if  the  Target  Intensity  falls  outside  the  range  that 
the  Auto  Luminance  circuit  is  capable  of  controlling.  This  feature  is  only  available  on  the  following  models: 
LCD2490WUXi, LCD2490WUXi2, LCD2690WUXi, LCD2690WUXi2, and LCD3090WQXi. 
The MultiSync PA Series of displays (except the PA231W) automatically always use Auto Luminance to maintain 
the stability of the monitor. The PA231W does not support Auto Luminance.
24	 |	SPECTRAVIEW	II 	- 	USER’S 	GUIDE
Delay loading of SpectraView II Gamma loader on Windows Startup (ÿ Windows version only) - selecting 
this will delay the loading of the SpectraView II Gamma Loader when Windows starts by 60 seconds in order 
to  allow  other  applications  and  utilities  to  initialize  first.  Select  this  option  if  you  are  experiencing  monitor 
detection or video blanking issues only when the SpectraView II Gamma Loader runs as Windows starts.
  
						

							25	 |	SPECTRAVIEW	II 	- 	USER’S 	GUIDE
The Information  window  is  accessed  from  the Tools  menu.  It  will  also  be  automatically  displayed  after  a 
display calibration is completed. 
Inf\frmati\fn \bind\f\b
Note: The graphs shown in the Information window can be panned, zoomed and scaled. Click and drag to 
select a zoom area. Use the arrow keys to pan. Size the dialog to scale the graphs. 
The  graphs  and  information  can  also  be  copied  to  the 
clipboard  and  pasted  into  other  document  and  image 
editing applications by right-clicking and selecting Copy. 
This is useful for sharing and documenting various results
Inf\frmati\fn \bind\f\b - Summary tab 
White Point
The Target  values  are  the  currently  selected  Target’s  White  Point.  The Calibrated  values  show  the 
actual measured White Point after the display has been calibrated.
The Delta  E  value  is  the  calculated  color  difference  between  the Target  and Calibrated  White  Point 
using both the color and luminance.  This is calculated using the Delta E CIE 94 color formula. A Delta 
E  value  of  1  is  considered  just  perceptible  to  50%  of  users.  Values  under  3  are  generally  considered 
excellent for display calibration.
  
						

							26	 |	SPECTRAVIEW	II 	- 	USER’S 	GUIDE
Primary Colors
Red,  Green  and  Blue  CIE  x,y  - shows  the  measured  color  coordinates  of  the  display’s  primary  colors. 
These values represent the color gamut of the display. The Source of the color measurements indicates if 
the Red, Green and Blue values came from either the Calibration Sensor or Factory Measurements, and will 
depend on the Primary Colors Chromaticity Source setting in the Preferences dialog.
Display Luminance
The Target values show the currently selected Target’s Black Level and Intensity. 
The Calibrated  values  show  the  actual  measured Black  Level  and Intensity  after  the  display  has  been 
calibrated. 
Contrast Ratio
The Contrast Ratio is the ratio of the Intensity to the Black Level. The Target value shows the currently 
selected  Target’s  Contrast  Ratio.  For  LCD  display  monitors,  this  is  set  to  “N/A”  since  the  monitor’s  Black 
Level is fixed. 
The Calibrated values show the actual contrast ratio calculated using the actual measured Black Level and 
Intensity after the display has been calibrated. 
Gamma Curve
Target shows the type or gamma value of the Target Gamma Curve.
Calibration  Steps  - shows  the  number  of  calibration  steps  used  to  measure  the  grayscale  when  the 
calibration was performed. 
ICC Profile
File  Name shows  the  name  of  the  ICC/ColorSync  profile,  if  one  was  generated  after  the  display  was 
calibrated.
Description shows  the  description  tag  text  of  the  ICC/ColorSync  profile,  if  one  was  generated  after  the 
display was calibrated.
Display Monitor
Model shows the model name of the currently selected display.
Serial # - shows the serial number of the currently selected display. 
Firmware - shows the internal firmware version of the currently selected display .
Current Usage shows the total number of hours that the currently selected display has been in use.
Last Calibration shows the number of hours that the currently selected display has been used since it was 
last calibrated.
Calibration  Date shows  the  date  and  time  that  the  monitor  was  last  calibrated  to  the  currently  selected 
target.
Calibration Sensor
Model shows the model name of the calibration sensor used when the calibration was performed.
Serial # - shows the serial number of the calibration sensor used when the calibration was performed. 
  
						

							27	 |	SPECTRAVIEW	II 	- 	USER’S 	GUIDE
Inf\frmati\fn \bind\f\b - C\fl\fr Gamut tab
The  Color  Gamut  tab  graphically  illustrates  the  color  gamut  of  the  display  for  comparison  purposes  as  a  2D 
representation of the 3D color gamut volume. The display’s color gamut can be compared to the color gamut 
of several popular color spaces.
The  source  of  the  color  measurements  for  the  display’s  color  gamut  will  depend  on  the Primary  Colors 
Chromaticity Source setting in the Preferences dialog. 
If a Target Color Gamut other than Native is being used, then selecting Target will show the Target color gamut. 
This will be disabled if the Native color gamut is used since it will depend on each individual display .
Selecting a reference color space will overlay the color gamut onto the display’s.
Colorspace
•	CIE xy - shows the gamut projected in CIE xy colorspace. This is probably more familiar to 
most users, however it does not allow color differences to be easily judged because this projection 
overemphasizes differences in green colors, and underemphasizes differences in blue colors. 
•	CIE u’v’ - shows the gamut projected in CIE u’v’ colorspace. This is projection is an improvement 
over CIE xy in that different colors are more equally represented in scale.
Show back body curve - shows the black body locus as yellow curve.
Show Target white point - shows the White Point of the currently selected target as a green X.
  
						

							28	 |	SPECTRAVIEW	II 	- 	USER’S 	GUIDE
Inf\frmati\fn \bind\f\b - Curves tab
The Curves tab graphically illustrates the various tone response and correction curves measured and generated 
during the calibration process. 
Show Curve Type 
Target  -  illustrates  the  target  tonal  response  curve  of  the  currently  selected  Target.  This  display  will  be 
calibrated  to  match  this  curve.  This  curve  will  be  disabled  and  not  shown  if  the  Target  Gamma  is  set  to 
Monitor Native Gamma.
Calibrated - illustrates the actual measured tonal response curves of the calibrated display. These curves 
are generated from measurements taken while generating an ICC/ColorSync monitor profile of the display. 
If  no  ICC/ColorSync  profile  was  generated  after  the  monitor  was  calibrated,  then  this  checkbox  will  be 
disabled.
Uncalibrated  -  illustrates  the  actual  measured  tonal  response  curves  of  the  uncalibrated  display,  without 
any  corrections  applied  to  the  Look  Up  Tables.  These  curves  are  generated  from  measurements  taken 
during the calibration process. 
Correction - illustrates the correction that is applied to the display’s Look Up Tables in order to achieve the 
selected Target tonal response curve characteristics. 
Note: The Uncalibrated and Correction curves are not available with the MultiSync PA series displays because 
they are calculated within the display automatically.
Show Curve Color
The All, Red, Green and Blue buttons select which curve colors are displayed on the graph.
  
						

							29	 |	SPECTRAVIEW	II 	- 	USER’S 	GUIDE
Inf\frmati\fn \bind\f\b - C\fl\fr Tracking tab
The Color Tracking tab shows graphically how well the grayscale (colors from black to white) of the display is 
conforming to the currently selected Target. Ideally all points along a grayscale measured on the display should 
have the same white point (chromaticity) and should follow the luminance curve of the  Target.
Deviations from this ideal can result in grayscale color tracking errors which can be seen as shifts in chromaticity 
along  the  grayscale,  and/or  shifts  in  luminance.  The  Delta  E  values  are  a  mathematical  measure  of  these 
deviations.  A  Delta  E  value  of  1  is  considered  to  be  just  perceptible  to  50%  of  users.  Values  under  3  are 
generally  considered  excellent  for  display  calibration.  Values  above  3  will  be  highlighted  in  yellow  or  red  and 
may indicate a problem with the display’s calibration.
The  graph  shows  the  displays  actual  measured  grayscale  color  tracking  using  measurements  taken  while 
generating an ICC/ColorSync monitor profile of the display.
The horizontal axis shows the Delta E values for each measured point on the grayscale. The vertical axis shows 
the luminance for each of the measured points on the grayscale.
Note: Since the Delta E values are calculated based on the currently selected Target, if a Target using Intensity: 
Specific Level is being used, and the display was not able to actually achieve the Target’s specified Intensity 
value, then this will result in large Delta E values.
Delta E 
Average - shows the average of all the calculated Delta E values. 
Maximum - shows the maximum of all the calculated Delta E values.
Include  Dark  Values  -  selects  if  the  graph  and  average  Delta  E  value  calculation  include  measurements 
taken near absolute black (having a luminance of less than 5 cd/m²) on the display. Typically these values 
are  not  included  since  the  low  luminance  can  cause  measurement  errors  that  may  cause  artificially  high 
Delta E values to be shown. Selecting this option will cause all measured values to be included.
Show Average - shows the average Delta E value as a vertical line on the graph display.
  
						

							30	 |	SPECTRAVIEW	II 	- 	USER’S 	GUIDE
Inf\frmati\fn \bind\f\b - DICOM C\fnf\frmance tab
The DICOM Conformance tab shows graphically and numerically how well the calibrated display conforms to 
the ideal DICOM (Digital Imaging and Communications in Medicine) response when a DICOM Target curve of 
is used. 
The  aim  of  the  DICOM  response  is  to  have  a  perceptually  linear  luminance  response.  Each  step  along  the 
display’s grayscale should have an equally perceptive increase in luminance. The actual shape of the DICOM 
response  curve  is  based  on  the  display’s  measured  Black  Level  and  Intensity,  since  the  DICOM  response 
considers the human eye’s non-linear response to light.
In DICOM terminology, the grayscale level is called the Digital Driving Level and represents the digital output 
video  level,  from  0  to  255.  Each  step  in  Digital  Driving  Level,  should  result  in  an  equal  step  in  perceived 
luminance.  In  DICOM  terminology,  a  change  in  luminance  that  is  just  perceptible,  is  considered  to  be  1 JND 
(Just Noticeable Difference). So, ideally, each step in Digital Driving Level should result in an equal change in 
Just Noticeable Difference value. The JND values are calculated using a complex formula from two measured 
luminance values.
The  display  calibration  results  can  be  viewed  in  two  different  types  of  graphs, JND  per  DDL,  and Contrast 
Response, by selecting the corresponding graph type.
JND per DDL (Just Noticeable Difference per Digital Driving Level)
Average  -  shows  the  average  JND  per  DDL  value.  The  actual  value  will  depend  on  the  Black  Level  and 
Intensity of the display.
Std Dev - shows the standard deviation of all of the calculated JND per DDL  values. 
Show Average - shows the average JND per DDL value as a horizontal line on the graph. 
Show Linear  Fit -  shows  the  best  fit line  between  all  the  calculated  JND  per  DDL  values  as  a  line  on  the 
graph.  Ideally  this  line  should  be  horizontal,  indicating  equal  steps  in  JDN  per  DDL  along  the  display’s 
grayscale.