GUIDE TO INSTALLATION AND OPERATION
38
| XVP-1801
Dolby-E Alignment:
•
When Dolby-E audio is present, this panel will display the offset/delay between the Dolby-E and the
video output of the card. You may click the Auto Align button to automatically adjust the audio timing
delay to ensure a perfect zero delay with the 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 other audio type 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.
3.5.6
The
Audio Out (Video)
group
This group provides additional audio processing for the 16 audio channels embedded in the HD/SD outputs:
audio channels mixing and audio embedding mode. The XVP-1801 may be paired with up to two DAP, AAP
or UAP cards for additional audio channel inputs to the mixers and for discrete AES outputs.
CH 1-2, CH 3-4, CH 5-6, CH 7-8, CH 9-10, CH 11-
12, CH 13-14 and CH 15-16
tabs
Each of these tabs provides all necessary controls
for the output mixers.
Operation Mode (Off, A, SUM(A+B), Mix):
This
menu allows the source of each output channel to
be selected – a single channel, the sum of two
channels or a mix of two channels.
Off:
The output channel is muted.
A
: The output channel is the channel source
(
ABUS Select
and
Channel
) selected in sub-
menu SOURCE A.
SUM (A+B)
: The output channel is the sum of
the two channels sources (
ABUS Select
and
Channel
) selected in sub-menus SOURCE A
and SOURCE B.
•
If you select this option, the SUM (A+B)
Level pull-down is activated, allowing you
to reduce the level of the summed output
(0dB, -3dB or -6dB).
Mix
: The output channel is a mono mix of the (
ABUS Select
and
Channel
) selected in sub-menus
SOURCE A and SOURCE B.
Figure 3.24
Audio Out (Video) group