Tektronix SPG8000 Technical Reference page 130

SDI button menu (Option SDI only)
118
K parameter.
2
X
Display name: KX^2 (H Sweep.)
Units: c/aph per active picture height (c/aph
The K (H Sweep) parameter sets the increase (or decrease) in the horizontal
2
X
frequency as a function of position along the video line. When K
applied, the result resembles a common sweep test signal. Again, use a waveform
monitor to look at (all) the video lines to see the effects of K
setting K to 9 will result in the line waveform changing from DC to 9 c/aph in
2
X
the width equal to one "active picture height." As with K
will depend on the aspect ratio of the active video format. For example, in a
16:9 format with a K of –9.0, a K
X
to increase to DC in one "aph." The frequency will continue to increase to
approximately 7.0 c/aph by the end of the line.
Use this formula to calculate K
at mid-screen:
where R is the aspect ratio (width ÷ height) of the active format.
aspect
The Horizontal Sweep zone plate (H Sweep) is a "K
Figure 40.)
Figure 40: A "K -only" zone plate
2
X
)
2
coefficient of 9.0 will cause the waveform
2
X
and K terms for a sweep with the DC point
2
X X
-only" zone plate. (See
2
X
SPG8000 Technical Reference
alone is
2
X
. When K is 0.0,
2
X X
, the ending frequency
X