Page 83
724-746-5500 | blackbox.com
Chapter 7: How to Remotely Control the Host Computer(s)
Auto Everything
Press this button to automatically fine-tune all three adjustments. If the test pat-
tern for Color Offset calibration is not present on the screen, then the Color
Offset adjustment is skipped.
Changes/frame
Press this button to indicate the number of 16 x 16 blocks of video that are being
sent, on average, for every frame of video. With a static image being displayed by
the server, this number will be zero (shown as -nil-). Moving the mouse, for exam-
ple, will cause the number to jump to about 2 or 3. You may use this number to
judge the picture quality as you adjust the controls on this menu.
Picture Positioning
This option affects the image position on your screen. If you see a black line on
either side of your screen, or at the top or bottom, you can use the arrow buttons
to shift the image in that direction. Pressing Auto does the same thing for you
automatically. Use Save to save the changes you have made manually. Since this
adjustment depends on the video mode, separate values are stored for each video
mode.
Color Offset & Gain
This is a fine-tuning adjustment that requires the use of a test pattern. There is a
copy of the test pattern available on the Help menu of the integrated Web server.
Download that image to the host computer(s). Do not allow scaling, cropping or
any other changes to that image. Press the Auto button and the system will cali-
brate color for the best possible picture in approximately one minute. If the system
cannot find the test pattern on the screen, it will say so. Check that the pattern
isn’t scaled or covered up. It’s important to do this operation in 24-bit or 32-bit
color video mode (that is, true color). Although the algorithm may work in 16-bit
or 8-bit color video modes, the results will not be optimum and usually it won't
be able to recognize the test pattern.
Advanced
Press this button to open the Advanced Video Tuning menu. While the vast
majority of users will not need to adjust these settings, it offers a high degree of
control of the video settings of your VNC sessions.