Display Information
Audio Video De
lay (AVD) Display
View the Audio/Video Delay (AVD) Display by pressing the MEAS button and
selecting AV D e l a y as the display type. AVD measures the duration that a video
system advan
ces or delays the audio signal relative to its correct temporal position
in the test signal of the lissajous channel pairs.
AVD allows you to take measurements and display them in both numeric and
graphical formats. AVD measurements require an appropriate AVD sequence
signal source, such as from a Tektronix TG700 signal generator. This capability
is useful for facility maintenance and setup applications because it allows for
out-of-service testing to quickly check synchronization across a facility. AVD
supports digital and composite inputs, and the following audio inputs: embedded,
AES, and analog. (See Figure 29.)
Figure 29: AV Delay display
Elements of the
Audio/Video Delay Display
AV D e l a y b a r : Shows the timing relative to audio.
Measured AV Delay: Shows the timing difference measurement.
Manual Offset: Shows the manual offset value.
Adjusted AV Delay: Shows the adjusted timing difference.
Audio/Video Display
Pop-Up Menu
AV Delay Enable: Choose from On or Off.
Clear Offset: Press the SEL button to clear the offset.
Save Offset: Press the SEL button to save the offset.
WFM8200 and WFM8300 Waveform Monitors 53
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