GRASS VALLEY Profile XP PVS1000, Руководство по обслуживанию

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Chapter 3 Troubleshooting video problems
44 Profile XP Service Manual 23 July 2004
Correcting common video problems
This troubleshooting aid provides corrective action for some common video
problems. Search the table for the problem you are experiencing, then try the
corrective action. Some problems have more than one corrective action.
Problem Possible Causes Corrective Action
Video output distortion in
playback and E to E. Wrong video standard. Verify system video standard is
configured correctly. Refer to
“Changing the system video
standard” in the Profile XP
System Guide.
Continuous horizontal picture
shift in Record mode (or E to E).
Sometimes intermittent
depending on the input signal
selected. Input frame sync set to “pass”
when incoming signal is
asynchronous. Set frame sync to “Auto-time”.
Refer to “Options for timing
asynchronous feeds” in the
Profile XP System Guide.
Playout timing is 16 lines
delayed Playout timing set to E to E
timed output. Change playout timing to
“Zero-Timed” output. Refer to
“Adjusting playout timing to
match zero time” in the
Profile XP System Guide.
Vertical shift when switching
between video input and
playout. Playout timing set to
Zero-Timed output. Change playout timing to
“E to E-Timed” output. Refer to
“Adjusting playout timing to
match E to E timing” in the
Profile XP System Guide.
Compression artifacts are
present in the output. Video quality setting is too low
for your program material. Select higher video quality
preset (refer to “Guidelines for
selecting Video Quality Presets”
in the Profile XP System Guide,
or define your own video quality
preset. Refer to “Defining and
selecting a custom video quality
preset” in the Profile XP System
Guide.