Belden Grass Valley XVP-3901-DPI, Руководство по установке и эксплуатации, Страница: 58 / 87

GUIDE TO INSTALLATION AND OPERATION
52 | XVP-3901-DPI
video. This is equivalent to changing manually the audio delay in the audio processor. If you change the
output timing of the card or the video output format, you may have to re-align the Dolby-E.
•
The offset is not available for any type of audio other than Dolby-E.
The measured Dolby-E offset can be a positive OR a negative value. A negative value indicates the Dolby-E is in
advance compared to the video and additional delay should be added to the audio channel pair.
A positive value indicates the Dolby-E is late compared to the video and the audio delay must be reduced for this
channel pair. Sometimes, the audio delay cannot be compensated because it would mean to have an audio delay
lower than the processing delay of the card. In this case, you have to add an extra frame delay to the video to provide
more range to the audio delay.
5.8 Audio Outputs panel
This panel provides additional audio processing for the 16
audio channels embedded in the 3G/HD and SD output, and
for the four AES outputs:
•
audio channel shuffling
•
level adjustment
•
mixing
•
audio embedding mode.
The XVP-3901 may be paired with up to two DAP or UAP
cards for additional audio channel inputs to the mixers and for
discrete AES/analog outputs.
You can configure the audio output shufflers/mixers (3G/HD,
SD and AES) differently for an SD input than for a 3G/HD
input. The card will remember the different parameters and
will load them automatically without user intervention based
on whether the video input is SD or 3G/HD. Ensure the card
has a video signal of the desired format before changing the
configuration.
The panel has a set of tabs at the top to allow the appropriate
audio channels to be accessed (figure 5.48). The available
controls are virtually identical in all cases, so they will be
described only once.
Figure 5-47 Audio Outputs panel
Figure 5-48 Audio outputs tab structure