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Even so, problems result if one soldier leads with the left foot while others are on the right. Or perhaps
everyone is evenly spaced and perfectly aligned but for one misfit who ‘tailgates’ the soldier ahead of him
and keeps stepping on his heels.
This is essentially why the Genlock tab provides several settings. The Horizontal and Vertical Position
settings pin the image in the proper space in the frame, and in doing so could be likened to making sure
each marching soldier is in position relative to his fellows (as viewed from above).
The Phase setting ensures proper color alignment, corresponding to making sure everyone is on the left
or right foot at the same time.
Thus, the Vert Position, Horiz Position and Phase settings allow you to tweak synchronization to arrive at
an optimum match between devices. (Typically, these settings are fine-tuned with the aid of downstream
vectorscope and waveform monitors.) A discussion of these adjustments goes beyond the scope of this
manual, but a quick online search for the keywords “genlock” and “adjust” turns up a number of excellent
references.
REFERENCE TYPE
The ‘bi-level’ reference signal long used for standard definition television is often used for genlocking both
SD and HD installations. However, if you are supplying an HD reference signal to the Genlock input (and
your other equipment), select the HD (Tri-level) switch in the Reference Type area of the Genlock tab.
Note: Reference Type options do not appear for SD sessions.
CENTER FREQUENCY
Figure 69
This setting is applied when a Genlock reference signal is not in use. To adjust the setting, supply color
bars to an input, pass that through to a video output, and then to a downstream vectorscope. The
vectorscope display is completely stable when Center Frequency is properly adjusted.
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