Tektronix TG8000 User Manual

SDI7 Dual Channel SD/HD/3G SDI Video Generator module
K
XY
parameter
Display name: K
XY (V Ch. H Freq.)
Units: c/aph per active picture height (c/aph
2
)
The K
XY
(V Ch. H Freq.) parameter sets the change in horizontal frequency
as a function of the vertical position in the video frame. To see the effects of
this parame
ter, set the waveform monitor to view one selected line only. Then,
with K
XY
set to approximately 25 (all other coefficients left at 0.0), look at line
waveforms from top to bottom of the frame. The horizontal frequency increases
slightly on each succeeding line, reaching 25 c/aph on the last line of a ctive video.
The result can be thought of as a vertically arranged “sweep” signal.
K
Y
parameter
Display name: KY (V Freq.)
Units: cycles per active picture height (c/aph)
The K
Y
(V
Freq.) parameter sets the initial ve rtical frequency of the pattern (it
is analogous to K
X
rotated 90° clockwise). To see the effects of this parameter,
set it to a low number and adjust a waveform monitor to view one or two fields
of the SDI7 output. The variation in the (dc) voltage level from line to line will
give the field waveform the appearance of a sampled sine wave, espe cially at a
K
Y
of around 5 to 10 c/aph (the sinusoid can become difficult to discern at higher
frequ
encies). Note that in the Y (vertical) parameters, the c/aph units translate
directly into visible cycles down the frame.
The V
ertical Sine zone plate is a “K
Y
-only” zone plate. (See Figure 3-119.)
Figure 3-119: A “K
Y
-only” zone plate
3–278 TG8000 Multiformat Test Signal Generator User Manual

Tektronix TG8000 Specifications

General

Brand	Tektronix
Model	TG8000
Category	Portable Generator
Language	English