StarTech.com SV3253DXI - Manual (Page 48)

Instruction Manual
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Flatness Filter
To improve compression ratios, the SVxx53DXI will group adjacent pixels that are
nearly the same colour and treat them as equal. This helps to compress typical simple
GUI images. However, the effect of this compression on continuous-tone images and
gradients can be annoying. You may turn off or reduce the flatness filter to sacrifice
bandwidth for improved image quality in those areas.
Please note that at higher values, some parts of the screen may appear “blocky”.
Getting Peak Video Performance
Choose the best video mode
• We recommend using 60Hz refresh rate and 1280 x 1024 resolution. Using a smaller
resolution like this allows you to fit multiple windows on your remote desktop.
Higher refresh rates stress the video card’s quality and do not provide any additional
information or benefit.
Noisy video cards
• A digital KVM works by converting the analog video signals emitted by your video
card into digital data. If there is noise on that signal, then it must also be digitized
and sent over the network. Quality video cards, in our experience, offer better
performance simply because they don’t add analog noise.
• Some external KVM switches generate video noise as well. Try to keep cables short,
in order to reduce this effect.
• Enable the Noise Filter option (on the Video Tuning menu) to mitigate noise issues.
Network performance
• SVxx53DXI will always send as much data as it can, given what’s happening on the
screen and the actual network performance. When nothing is changing on thevideo
screen, zero bytes are sent over the network. If the whole screen is changing, then
the unit will send as much data as your network connection and VNC client allow.
• Network latency, which is the total time it takes for a packet to get to the SVxx53DXI and
come back, has the biggest impact on perceived performance and usability. Network
bandwidth has a lesser effect, particularly when just moving the mouse around.
• Only a few bytes need to be sent when the mouse is moving (and nothing else is
changing on the screen), but the round-trip-time limits the hand-eye coordination
of the user if it is too great.
• Both actual bandwidth and measured network latency are shown in the Main Menu.