NVIS AVCU User Manual Download Page 13

 

Advanced Video Control Unit (AVCU) User Guide

                                

13

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Figure 15: The Settings Tab 
 

If these options are grayed out, this means that your hardware does not support dithering, but it 
can be upgraded. 
 
Contact  NVIS  for  more  information  at 

[email protected]

.  Valid  settings  for  the  dithering 

configuration: 
 

  Use the full 8 native bits per color, with no dithering 

  Truncate down to 6 native bits per color, with 2 bit dither boost 

  Truncate down to 4 native bits per color, with 4 bit dither boost 

 
Once you’ve set the dithering configuration, you need to go to the 

Sequence

 screen to select the 

appropriate color sequence for your dithering configuration

 
Click the 

Connection tab

. The window from

 

Figure 13

 

should appear, showing the sequences 

currently  loaded  on  your  AVCU.  The  appropriate  color  sequences  for  the  valid  dither  settings 
listed on the previous page are respectively: 

 

  48212 ab smooth asic v2_0.seq (8 bit sequence w/ no dithering) 

  48251 ab smooth 666 v1_0.seq (6 bit sequence w/ 2 bit dithering) 

  48252 ab smooth 444 v1_0.seq (4 bit sequence w/ 4 bit dithering

– default) 

 

 

TROUBLESHOOTING YOUR SYSTEM 

 

 

Summary of Contents for AVCU

Page 1: ......

Page 2: ...nced Video Control Unit 3 Step by Step Setup Procedures 4 Configuring the AVCU 5 Automatic Video Detection 5 Navigating the AVCU Interface 5 Adjusting Brightness 6 Setting AVCU Preferences 7 Using SXP...

Page 3: ...TROL UNIT The AVCU accepts the video signal from the image generator and provides the correct sync and voltage information to the microdisplays in the head mounted display The AVCU design supports mul...

Page 4: ...ich includes the universal power supply into the AVCU and into 110 220V AC source Connect your video cable s to the computer and to the AVCU Connect an optional external monitor from the AVCU two exte...

Page 5: ...r in this guide NAVIGATING THE AVCU INTERFACE The front of the AVCU has an LCD screen that displays various settings and messages Next to the LCD reside three buttons used for navigation and toggling...

Page 6: ...n for both eyes will be displayed Figure 8 shows and example of the video detection banner In the example a DVI signal is detect on the left channel as indicated by the x Figure 8 Video Detection Disp...

Page 7: ...one by pressing buttons to scroll through the various settings You can hit the Enter button to change a setting In Figure 11 the DAC output setting is selected The pointy brackets on the first line of...

Page 8: ...nputs for analog signals If this is the case the automatic video detection circuitry will fail to detect incoming video signals To set up the video inputs correctly one of the manual analog settings w...

Page 9: ...efault two files with the hex extension are placed in the following directory folder path or similar based on your specific installation C Program Files SXprog User Code Select both the AP hex and BP...

Page 10: ...ctor on the AVCU Launch the SXprog application Before starting make sure you have the new color sequence file loaded into the following directory folder path or similar based on your specific installa...

Page 11: ...ormat you are using Pixel screen position is adjusted for standard analog video at the factory unless otherwise requested If pixel screen position is improperly adjusted horizontal wrapping can occur...

Page 12: ...in regions of the database that contain transitioning color gradients or textures with many gray levels This situation is caused by the time delay between modulating for the first and last bit of a gi...

Page 13: ...native bits per color with 4 bit dither boost Once you ve set the dithering configuration you need to go to the Sequence screen to select the appropriate color sequence for your dithering configuratio...

Page 14: ...to force the AVCU to VGA mode There are two such modes depending if you have a single input or dual Consult Configuring the AVCU for more information Digital video configuration issues should be rare...

Page 15: ...NVIS Inc 11495 Sunset Hills Road Ste 106 Reston VA 20190 www nvisinc com 571 201 8095...

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