Configuring A System For External Genlock Or Framelock - Silicon Graphics Prism Hardware User's Manual

4: Troubleshooting and Diagnostics

Configuring a System for External Genlock or Framelock

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External genlock and framelock may be used on systems with at least one optional
ImageSync board.
To configure your system to receive an external genlock or framelock signal you must
run the setmon command with the appropriate options.
Before running setmon, use printenv DISPLAY to ensure that the DISPLAY
environment variable is set to the local system (for example, :0.0). If it is not, use setenv
DISPLAY :0.0 to change it (substituting other numbers for :0.0 if appropriate).
To set the system for genlock, execute the following command:
pipenumber
# setmon -p
where pipenumber is the pipe to which this setting should be applied, and
graphicsformat is one of the timings (modes) listed in the "Monitor" section of the
/etc/X11/XF86Config file.
To set the system for framelock, execute the following command:
pipenumber
# setmon -p
where pipenumber is the pipe to which this setting should be applied,
videoformat is the input video format to be used as a framelock source, and
graphicsformat is one of the framelock-certified timings (modes) listed in the "Monitor"
section of the /etc/X11/XF86Config file that is compatible with the chosen input
video format (Table 4-6 on page 131 provides a list of compatible formats).
Note: The default behavior of setmon is to load the new format for the current session
only and to prompt for input to determine if the format should be saved as the default.
To save the new format as the default you must be logged in as root.
For more information about the setmon command, see the setmon man page (man
setmon).
Note: Framelock-certified timings will include an "f" appended to their name (i.e.,
"1280x1024_5994f" is certified for NTSC (525 line) video timing).
graphicsformat
-g
videoformat graphicsformat
-L
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