Setting The Vertical Phase Of The Output Video; Setting The Horizontal Phase Of The Output Video; Figure 7-5: V Phase Offset Slider - evertz 7800 Manual

Note that if the selected genlock reference disappears or is not valid, the card will
lock to incoming video.
7.1.3.

Setting the Vertical Phase of the Output Video

With the V Phase Offset control, you can set the vertical timing of the output video with respect to the
selected reference. Setting this control to 0 keeps the output video frame aligned with the reference.
Increasing the value will delay the output video in one-line increments of the output video standard. In
order to advance the vertical timing of the output video with respect to the reference, set the control to the
maximum total number of lines of the output video format minus the number of lines that you wish to
advance the output video. When increasing the V Phase Offset value causes it to go beyond the limit of
the frame buffer, the V Phase Offset will wrap to the beginning of the frame buffer, resulting in a change
of one frame of processing delay. The VLPRO interface for changing the V Phase Offset control appears
as shown in Figure 7-5.
Note: The slider is available for selecting H and V Phase Offsets. To increment click
on the right hand side of the slider. To decrement click on the left hand side of the
slider. The slider can also be selected and dragged across the available range if
gross movement is desired.
7.1.4.

Setting the Horizontal Phase of the Output Video

With the H Phase Offset control, you can set the horizontal timing of the output video with respect to the
selected reference. Setting this control to 0 keeps the output video line aligned with the reference.
Increasing the value will delay the output video in one-sample increments. In order to advance the
horizontal timing of the output video with respect to the genlock video, set the control to the maximum
number of samples per line for the output video standard minus the number of samples that you wish to
advance the output video. The VLPRO interface for changing the H Phase Offset control appears as
shown Figure 7-6.
7812DCDA2Q-HD (-AA, –AES4) Dual Path HDTV Down-converter

Figure 7-5: V Phase Offset Slider

Revision 1.0
7800 MultiFrame Manual
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