Application Example
To use the Timing display to time a signal to a reference.
1.
Select a tile in which to time the active input.
2.
Apply the input signal to be timed to the appropriate input, terminate it
properly and select it.
3.
Apply the house reference signal to the external reference input, terminating it
properly.
4.
Press the
EXT REF
button to select External Reference mode.
5.
Press the
MEAS
button to select the Timing display for the tile selected in
step 1.
6.
If only one circle is displayed, adjust the timing offset of the black generator
to match the timing to the external reference. Adjust for a perfect coincidence
of the circle around the reference target (circle turns green at coincidence) and
null values of the vertical and horizontal timing readouts.
7.
If multiple circles are displayed, the timing is complex, and you must choose
the one you want. The measurement that is closest to zero offset is displayed
with emphasis and appears in the readouts.
NOTE.
See Timing Displays for Simple Versus Complex Timing for more
information about complex timing displays and their elements. (See page 46.)
9.
Repeat step 6 or 7 for any other signals.
NOTE.
As you adjust timing, the circle representing the input timing may jump
occasionally. This is because the color frame detection circuit can be temporarily
disrupted as the signal shifts. The jump is often a multiple of the
fi
eld time. The
circle will settle back to the correct location in a second or so.
Timing Multiple Inputs to a
Router
Use the
Relative to:
function to set the offset between a master signal and a
reference signal as the zero-point reference for time-down applications. The
Relative to:
box indicates the chosen zero point for the timing display:
Rear Panel.
In this mode (default), the offset is zero when the measured signal
input and reference are at the same timing at the reference at the instrument
rear panel. This setting was used in the Timing Display Method procedure.
Saved Offset.
In this mode, you can save the timing from a master signal
relative to the reference as the zero point offset. Then route other inputs and
measure relative to this saved offset.
WVR5200 Waveform Rasterizer User Manual
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Summary of Contents for WVR5200 Series
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