GUIDE TO INSTALLATION AND OPERATION
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| XVP-3901
Note: The ALC works with PCM audio. If non-PCM audio like
Dolby -E or AC-3 is fed to the module, it will be ignored and
all the program channels will be bypassed to prevent
interference with the other PCM audio channels.
5.11.1 Config tab
Channels per program
Pull-downs are available to select the number of channels
per program. Depending on the ALC model, you may have
different possible selections, from 1 to 8 channels per
program.
Input channels selection
An input shuffler allows any combination of the available
channels to be used as inputs to each ALC program.
Note: An input channel cannot be assigned to more than one
program, and can only be used once within a program.
Global Config
The
Mode
pull-down selects preset values for target, sliding
window and loudness units that apply to loudness monitoring
for all programs on this XVP-3901:
Mode
Target
Short-Term
Time Window
Loudness
Unit
EBU R128
-23
3 sec
LUFS
A85 ITU BS.1770
-24
10 sec
LKFS
ARIB TR-B32
-24
3 sec
LKFS
Enable Loudness Monitoring
turns ON the ALC input and output loudness monitoring for all programs.
5.11.2 PGM1-8 tabs
Loudness monitoring
When turned ON, the loudness meters display the program input loudness (before ALC processing), the dynamic
correction applied by the ALC, the ALC limiter correction, and the program output loudness (after ALC processing).
The input and output loudnesses are given in
LUFS
or
LKFS
, depending on the Mode selected in the Config tab.
Loudness meters are integrated over a “sliding window” period which is also mode dependent.
Dynamic and limiter corrections are always given in dB. Each correction meter is integrated over a period of 250
milliseconds.
ALC Presets
Three factory presets for the ALC are available to cover most broadcast applications.
Figure 5.68 ALC panel – Config tab