User`s manual

14 / LM6 Radar Loudness Meter
Max Ldn Time
Options:0.4sec,3sec,4sec,5sec,or10sec
When Loudness Max is selected in Descriptors 1 or 2, this parameter sets the
windowforanalysis.E.g.if3secondsisselectedtheMaxLoudnessforthepast6
seconds is displayed.
Loudness
Loudness Std.
Options:BS.1770-2,Leq(K)orCntofGrav.
TheProgramLoudnessmeasureisalwaysrootedintheITU-RBS.1770loudness
model. This parameter sets measurement gating. Note that the parameter only
influences Program Loudness, and not Sliding Loudness or Loudness Max.
BS.1770-2
ThissettingreflectsthelatestrevisionofITU-RBS.1770.
Relativegateat-10LU,safetygateat-70LUFS.
Leq(K)
ThissettingreflectstheoriginalversionofITU-RBS.1770.
Nomeasurementgatebesidesfromatsafetygateat-70LUFS,sotheuserdoesn’t
need to precisely start and stop a measurement in order to avoid bias from complete
silence.
Cnt of Grav.
The standard setting from early versions of TC radar meters.
Relativegateat-20LU,safetygateat-70LUFS.
LU Reference
Range:-36LUFSto-6LUFS
The parameter specifies the loudness level to generally aim at. It affects a number
offunctionsanddisplaysinLM6,andmustbesetaccordingtothestandardyou
need to comply with. Current broadcast standards require Target to be in the range
between-26and-20LUFS.Forinstance,EBUR128callsfor-23LUFSwhileATSC
A/85specifies-24LUFS.
TheLUReferenceparameteraffectstheseLM6functionsanddisplays:
1. LU Reference sets the reference point for loudness measurements in LU. If the
Loudness Unit parameter is set to LU, Program Loudness, Sliding Loudness and
Loudness Max will be shown in LU relative to LU Reference. Meassurements that a
on precisely on target will consequently read “0.0 LU”.
2. LU Reference defines the “12 o’clock” value of the Radar meter.