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20. Click the Save Source button; this will save the User.Source.Config file of the VN-
Matrix device designated as the controller.
21. With the mode drop down list still set to auto, the VN-Matrix device should now
select the new user mode in the currentMode field.
22. Put up a moiré pattern and check for any clocking errors. If clocking errors exists,
select the User mode from the Name drop-down menu and adjust the value in the
PixelsPerLine field. Each time you enter a new value in the field, you must click the
Update button, click the Save Source button, and reboot the VN-Matrix controller
and encoder. Repeat this process until the clocking error is gone.
After creating your custom input mode, if the decoder does not find a suitable output
mode, you will need to create a custom output mode (see “Creating a custom
output mode”).
Managing Compression and Bandwidth Settings
The VNC 200 can apply various types of compression to an input source in order to reduce
the volume of source data being streamed across the network.
In addition, various parameters are provided to manage and, if necessary, limit the amount
of data flow to ensure that the available network bandwidth is not exceeded.
The default compression settings applied by the VNC 200 offer a good balance
between the quality of the displayed material and network bandwidth. Where network
bandwidth is restricted, extra compression can be applied. Depending on the source
type and content, significant reduction in streamed data can be achieved with little or no
perceptible affect on image quality.
Alternatively, where network bandwidth is not an issue, compression can be reduced to
provide increased image quality. However, in most cases, there is no real benefit in doing
this due to the highly efficient compression algorithms used by the VNC 200.
Bandwidth (Source) Page
All advanced source setup is achieved via the Bandwidth (source) page. This is accessed by
clicking the Bandwidth Management button on the Configure (videoPort) page for the
relevant VNC 200 encoder.
VN-Matrix 200 Series • Advanced Setup Procedures 64