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Instruction Manual
45
Optimizing video performance
Choose the best video mode
We recommend using 60Hz refresh rate and 1024x768 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
The SV441DUSBI 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 the video 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 SV441DUSBI 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.