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18 .....The Avocent® HMX High Performance KVM Extender System Installer/User Guide
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If video screens in your system are relatively static, increase the Background Refresh interval
and the Frame skipping percentage.
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As you apply each setting, you may wish to view video images with typical adjustments.
To configure transmitter video settings:
1. Select Video Configuration on the left side of the page, then adjust the following settings to
meet the needs of your system.
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Peak bandwidth limiter percentage: Select the percentage of bandwidth (0-95%) allowed
for the transmitter to prevent the transmitter from utilizing too much network capacity
when sending video and data over the IP network.
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Background Refresh: Select the frame rate to control bandwidth used by the transmitter
when sending the complete video image in the background. Any rate higher than 32
frames reduces bandwidth. The transmitter also sends the affected changes in the
image.
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Color Depth (HMX 6210T transmitter only): Select the color depth that best applies to
your system.
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Enable Anti Dither: Enable this checkbox to reduce the effects of dithering. While
dithering improves images by diffusing and altering pixel colors between video frames, it
slows down system performance. The Anti Dither feature ignores color dithering, which
increases the frame rate and eliminates unnecessary network traffic.
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Default DDC options: Disable the Use Default DDC checkbox to use the EDID reported
by the monitor that is connected to the receiver. Enabling the checkbox, however,
activates the Choose Default DDC drop-down list, allowing you to select from a range of
preset video resolutions.
NOTE: After a resolution is selected, the transmitter only supports that video resolution. All listed
resolutions are single-link DVI with a maximum pixel clock of 165 MHz and a refresh rate of 60 Hz .
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Hot Plug options: Select the Enable Hot Plug Detect...option to send a message to the
graphics card of the computer attached to the transmitter every time the monitor located
at the receiver is changed. Select the length of time that a hot plug detect signal is
applied from the options in the Period of Hot Plug Detect signal drop-down list. Most
graphics card operate efficiently at the 100 mS default.
•
Frame skipping percentage: Select the percentage (0-100%) of captured video frames
that can be skipped to reduce the overall bandwidth consumed by the system. This
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