Application Example
Application Example
Timing a Studio
Your instrument supports multiple methods and techniques for timing a studio,
all of which require an external reference to your instrument. Timing a studio
involves adjusting the references going to different sources so that their output
feeds have the same timing when they arrive at a common point, such as a
production switcher. For digital systems, timing typically must be close, but not
exact, because most switchers have some tolerance for timing errors. For analog
composite systems, the timing may need to be matched within a small part of a
subcarrier cycle to prevent hue shifts when switching between sources.
Following are procedures for timing a studio using various methods.
Using the Traditional
Method
Your instrument makes the traditional method of comparing Horizontal and
Vertical timing easier by providing
fl
exible tiles and a Freeze function. To time a
studio using the traditional method, you store an input as a baseline and compare
signals that you time against the baseline.
1.
Select a tile in which to time the active input. Select
WFM
.
2.
Apply the
fi
rst input signal to the appropriate input, terminate it properly,
and select it.
3.
Push and hold the
WFM
button. From the
Display Mode
submenu, select a
display mode that is appropriate to the signal that you input.
4.
Apply the house reference signal to the external reference input, terminating it
properly.
5.
Press the
EXT REF
button to select External Reference mode. (Connected to
the house reference.)
6.
Put the selected tile in line mode Using the
SWEEP
button menu.
7.
Use the
HORIZONTAL
knob to center the sync edge or the SAV pulse. (If
using the SAV pulse, turn off Stripping EAV/SAV/ANC in the SDI Input
setting of the Con
fi
guration Menu.)
8.
Press the
MAG
button to increase the timing resolution.
9.
Activate another waveform display in a second tile.
10.
Press and hold the
SWEEP
button and select
FIELD
to put the display in
fi
eld mode.
11.
Use the
HORIZONTAL
knob to center the vertical interval.
12.
Press the
MAG
button to increase the timing resolution.
13.
Press the
CAPTURE
button to save the waveform as a baseline.
WVR5200 Waveform Rasterizer User Manual
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