Qualis Audio Sentine, User Manual, Page: 70 / 108

64 User Manual
(~−8 dBu). Common digital settings are −20 dBFS (SMPTE
RP200(2002)) or −18 dBFS (EBU R68-2000).
Loudness Settings panel
The Loudness settings panel controls the loudness measurement func-
tions of the Sentinel. It controls the measurement method and the error
testing parameters. It also sets the Under Level Error thresholds and
durations.
Loudness errors are based on comparison of loudness measurements
with a reference level. The reference may be a fixed target level or
may be the dialnorm value extracted from a Dolby Digital or Dolby E
encoded stream. Both the fixed target and the selection of whether to
reference it or the dialnorm are set on the Loudness settings panel.
If the dialnorm value is not available (as occurs if a PCM signal is
received) the fixed target will be used.
Loudness measurement
Loudness Target Sets a target level to which loudness measurements
are compared in determining loudness errors. Used when the
Relative To setting is Target or when metadata containing dial-
norm is unavailable.
Loudness Target is also used as an alignment level for loud-
ness displays.
Loudness Standard Sets the weighting filter and measurement method
used. The choices are the ITU BS1770-1 standard referenced
by the ATSC, and the TASA standard used to measure film trail-
ers. TASA is not currently supported.
Measurement Mode Determines how the loudness measurement con-
trols are interpreted. When set to Measure/Pause the Loudness
meter control enables or pauses measurement. When set to P/
C, New the loudness meter control identifies the audio as pro-
gram material or commercials.