Advanced Video Control Unit (AVCU) User Guide
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This section lists common setup or configuration problems that may cause the NVIS display to
malfunction. If you experience problems that are not listed or not resolved after consulting this
section, please call or e-mail NVIS.
LEFT and/or RIGHT input not detected.
The Advanced Video Control Unit is designed to
automatically detect and communicate with modern video cards, but detection is dependent on
several factors including your driver version, cable length, and intermediate video hardware
(extenders or splitters).
Analog
video configuration issues can result from plug-and-play information not being
received from your video hardware. This can happen if your video cable is not transmitting
data on pin-
9, or if you’re going through a video distribution amplifier (i.e., splitter). Longer
VGA cables often do not contain pin-9. In these cases you will need 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, and usually can be addressed by
changes made in your video hardware ‘advanced setup’ configuration. Rebooting your
PC with the connections made and the AVCU powered ON will most likely solve the
problem otherwise.
Monitor output not working
. The monitor output will not function if the input video is not
recognized as 1280x1024 @ 60 Hz (SXGA) in analog or digital format. The LCD readout will
indicate if the input format is recognized as 1280x1024. Any other format will not be transmitted
to the repeated monitor.
Images do not appear in stereo
. This only applies to configurations with dual inputs, and these
images are rendered for the LEFT and RIGHT eyes. Make sure the LEFT and RIGHT HMD
cables are connected to the correct input connector on the AVCU. Also check the LCD readout
to make sure both eyes are receiving an input signal. Both eyes can be operational with a single
input if the second input is not recognized.
