7847FSEDA Series
Frame Synchronizer and Distribution Amplifier
Page - 56
Revision 0.1
minor/major/critical
fault trap to be sent to the registered trap alarm servers. The value range is 0.5
sec to 240 sec in increments of 0.5 secs.
Clear Duration:
This control allows the user to define the amount of time that the program audio
loudness level must remain below the
minor/major/critical
program threshold to trigger the
corresponding
minor/major/critical
fault trap to be cleared. This control is primarily used to smooth out
alarming for audio with a very wide dynamic range. The value range is 0.5 sec to 240 sec in
increments of 0.5 secs.
Program Monitor
Input Loudness:
This field displays the calculated audio input loudness level. This control is used for
monitoring purposes only. The value is reported in dBFS.
Gain Applied:
This field displays the amount of gain being applied by the IntelliGain
®
system. Values
can be either negative, indicating a gain reduction, or positive, indicating gain is being applied. The
value is reported in dBFS.
Output Loudness:
This field displays the program output loudness after the IntelliGain
®
processing.
This control is used for monitoring purposes only. It can be used to provide confidence monitoring.
The value is reported in dBFS.
Program Integrated Loudness Meter
Integrated Loudness:
This field will display the calculated integrated loudness audio level. This
control is used for monitoring purposes only. The period of the integrated loudness measurement is
defined by user interaction with the
Start/Continue
and
Stop/Pause
buttons. Once the
Stop/Pause
button is activated, the loudness of the segment(s) defined by all active periods is calculated. The
integrated loudness measurement is performed using the gating function specified in
ITU-R BS.1770-
2
summarized as follows:
•
an absolute gating threshold at -70 LKFS is used to compute the absolute-gated loudness level
•
a relative gating threshold that is 10 LU below the absolute-gated loudness level is applied
•
The measurement input to which the gating threshold is applied is the loudness of 400 ms
blocks with a constant overlap between consecutive gating blocks of 75%.
The value is reported in LKFS.
Maximum Loudness:
This field displays the maximum calculated loudness value within the duration
of the
Integrated Loudness
calculation. This control is used for monitoring purposes only. The value
is reported in LKFS.
Loudness Range:
This field displays the calculated loudness range within the duration of the
Integrated Loudness
calculation. The Loudness Range describes the distribution of loudness within a
program and is defined as the difference between the highest and lowest loudness values within the
integrated loudness period. The range excludes all loudness values in the top 5% and bottom 10% of
the loudness distribution after applying a relative gating threshold of 20 LU below the absolute-gated
loudness level. This control is used for monitoring purposes only. The value is reported in LU.
Содержание 7847FSEDA Series
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