9. Enter your value in the Vertical Back Porch field.
10. The final element is to calculate the Pixel Clock Frequency. This is calculated with
the formula:
Total Lines x Total Pixels x Frame Rate
In the above example, this equates to:
1000 x 1800 x 60 = 108000000
11. Enter your value in the Pixel Clock Frequency field.
12. Click Update, and then click Save Formats. The new mode should now be an exact
match for the connected source.
13. To test the new mode select the Display tab on the decoder, and ensure that Auto is
selected in the Output Format selector
14. Switch the resolution on the source to a different resolution and then switch it back
again. The mode should be displayed automatically.
Controller Configuration
The unit that has been designated as the controller for the system is responsible for
all communications to the VNC 200 devices that are part of that system. In addition,
all system specific information is held on the system controller. Each time a system is
powered, each device communicates with the controller to obtain information about its
status within the system as a whole.
The controller is the device that serves the web page for the browser to provide user
control.

Changing User Login Passwords

1. Log in to the web interface (see “VNC 200 Web Interface”).
2. From the Device List page click the Accounts tab.
The following page will appear:
Figure 49. Accounts Page
VN-Matrix 200 Series • Advanced Setup Procedures 79