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5 | Instruments | 5.3 | LRA EN-50
Manual | TM3-3GS
There are no common target LRA values defi ned in the loudness stan-
dards. Nevertheless, the three distinct areas „Comfort Zone“ (average
LRA values), „High Range“ (high LRA values) and „Low Range“ (low LRA
values) are used that can help to classify a program with regard to its
LRA measurement and mark it with a distinct color.
The „Magic LRA“ mode available in the LRA instrument uses a scale with
a fi xed centered zero position (corresponding to the target level) where
the LRA bar spreads symmetrically from the 0 position and its length is a
measure of the absolute LRA value. „Ma I“ mode is a combina-
tion of LRA and Integrated (I) loudness measurements. The LRA bar has
a moving, relative zero position that is anchored to the „Integrated“ value
measured.
Factory presets using the LRA instrument:
• 2CH SDI ATSC LRA+CORR
• 2CH SDI EBU LRA+CORR
• 3 X 2CH SDI ATSC
• 3 X 2CH SDI EBU
• 5.1 SDI ATSC LRA
• 5.1 SDI ATSC LRA+TC
• 5.1 SDI EBU LRA