Bowtie Display - Tektronix WVR8200 User Manual

Display information

Bowtie display

Elements of the Bowtie
display
Bowtie display pop-up
menu
60
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 frequencies on the chroma
channels 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 are 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. (See Figure 37.)
Figure 37: 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.
Parade / Overlay: Select how the waveform appears by selecting Parade
or Overlay.
Center Waveform: Press the SEL button to center the waveform.
WVR8200 and WVR8300 User Manual