Tektronix WFM2200A, User Manual

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Application examples
■ Timing a studio : This section contains three different procedures for 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.
■ Troubleshooting cable problems : This section contains a procedure for
troubleshooting cable problems.
You can use this instrument to generate a test signal that you can route
through your studio and back to the instrument to troubleshoot problems with
signal cables.
Timing a Studio: Using the traditional method
Your instrument makes the traditional method of comparing Horizontal and
Vertical timing easier by providing flexible 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 first 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 Configuration 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
field mode.
WFM2300 and WFM2200A Waveform Monitors User Manual 241