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38 User Manual
Configuration
Meter Scale sets the scale used to display the loudness measurement
bargraphs, and selects between relative and absolute display units.
The bargraph scale may be set to either of the EBU required ranges
of 27 or 54 LU, or a 75 LU range. The larger ranges allow monitoring
of wider dynamic range material at the expense of display resolution.
The 27 and 54 LU EBU meter ranges are positioned relative to the loud-
ness reference, with 1/3rd of the scale above the reference and 2/3rds
below. The reference may be a fixed target value, or the dialnorm value
from the Dolby metadata. The reference selection is set in the Loudness
settings panel (p. 64). The 75 LU meter range has its maximum at
0 LKFS.
The numeric loudness values may be displayed in either relative or
absolute units. (Except loudness range, which by definition is a relative
value.) The relative display shows measurements in loudness units (LU)
relative to the loudness reference.
Result Hold Time sets the time for which the panel displays the results
of completed integrated loudness calculations. The hold time may be
set to 1, 3, 10 or 30 seconds.
The integrated loudness, loudness range, maximum momentary loud-
ness and the maximum true-peak amplitude are all measured during a
defined time period, with definite beginning and end events. Although
the measurements are updated in real time, they are not final until the
end time is reached. In a real time measurement application, another
measurement follows immediately after a completed measurement. The
hold time gives an operator a chance to read the values before they
disappear and a new measurement begins.