Tektronix WFM2200A, User Manual

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AV Delay Measurement display (Option AVDP only)
The AV Delay Measurement display provides two measurements. The
measurements can be run only one at a time and require the instrument to be out
of service. In each measurement mode, a special signal is output from the SDI
OUT connector.
AV Delay: Measures the duration that a video system advances or delays the
audio signal relative to the video content. The measurement allows facility
engineers to ensure system integrity and facilitate A/V delay compliance.
In AV Delay mode, the video and audio on the SDI OUT signal are continuously
cycled between being on for 0.5 seconds then set to black and muted for
4.5 seconds.
Propagation Time: Measures how long it takes signal to pass through a video
system. The measurement allows facility engineers to align the timing of the
multiple incoming videos, check the delay of a CODEC system and/or a video
signal path, including the satellite feed.
In Propagation mode, the video and audio on the SDI OUT signal are
continuously cycled between being on for 0.5 seconds then set to black and
muted for 9.5 seconds.
NOTE.
The amount of time that the AV Delay or Propagation Time signal cycles
on and off varies slightly depending on the format of the SDI test signal output.
The A/V delay and propagation time can be measured up to the test signal
interval.
The Propagation Time measurement measures the delay of video signal path, not
the audio signal path.
To access the
AV Delay display
1. Press and hold the MEAS button to open the Measure pop-up menu.
2. Use the arrow keys to select Display Type > AV Delay .
3. Press the MEAS button to close the pop-up menu.
Display modes
78 WFM2300 and WFM2200A Waveform Monitors User Manual