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7: Interfaces
Spider™ and SpiderDuo® KVM-over-IP Device User Guide 68
Figure 7-5 Keyboard/Mouse Settings Page B
Video
The Spider device works by capturing and digitizing the analog video coming from the attached
computer. This analog video may have more or less low-level electrical noise present, depending
on the nature of the video card or embedded video controller.
When viewed on a monitor, this noise (if random) is invisible as the display is being redrawn 60 to
100 times a second. Inside the Spider device, however, the algorithm sees that noise as
something changing on the screen, so that requires sending off an update to the client system.
This can result in a constant stream of data even when the image on the target computer’s screen
is not moving. In order to avoid this, at Interface > Video > Miscellaneous Video Settings the
Spider device has a selection for noise filter. The larger filter openings will filter out more of the
noise, at the cost of potentially missing small incremental changes and seeing some compression
artifacts (blocky-ness). Filter settings of Medium or High will work for most applications. Be sure
to try the Remote Console Auto Adjust Video button a few times before deciding that a constant
stream of data represents electrical noise requiring a larger filter setting.
To modify video settings, perform the followings steps.
1. Click Interfaces > Video. The Miscellaneous Video Settings page displays.