Display Information
Bowtie Display
The Bowtie Display is accessed from the MEAS button. This display allows
you to look at inter-channel timing between Y Pb and Y Pr. The left side of
the display compares Y and Pb; the right side compares Y and Pr. The Bowtie
Display requires a test signal with signals of slightly differing frequencie s on the
chroma chan
nels than on the luma channel.
If the bowtie patterns have a sharp null, and the null is at the center of each
line, the relative amplitudes and inter channel timing a re correct. Interchannel
timing errors will move the position of the null. A relative amplitude error will
decrease the depth of the null. An incomplete null combined with an offset from
center indicates both amplitude and timing problems between the channels being
compared
. (SeeFigure26.)
Figure 26: Bowtie display
Elements of the Bowtie
Display
Display: Shows the display type as Bowtie.
Y-axis units: The units for the y-axis depend on the test signal and the signal
format.
X-axis units: Shows the x-axis in microseconds/divisions.
Bowtie Display Pop-Up
M
enu
Parade / Overlay: Select how the waveform appears by selecting Parade
or Overlay.
Center Waveform: Press the SEL button to center the waveform.
WFM8200 and WFM8300 Waveform Monitors 49
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