User guide

821116: AMP2 -1 6 V S e r i e s U se r Guide
© 2 014 Wo h l e r Te c h n o l o g ies , In c. A l l r ights re se rve d.
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Chap ter 5 M enu L ist
Lo ud ness Meas urement Menu
Figure 5–21 Loudness Measurement Menu
• Loudness Standard: Rotating this knob will select the Loudness
Standard to be used. As the Loudness Standard is selected, the
Reference Level and Alarm Tolerance settings assume their
default values for that standard. The choices are:
• ITU BS.1770-3 (default)
• EBU R128 (+9 Scale)
• EBU R128 (+18 Scale)
• Reference Level: Rotating this knob selects the Reference Level
in increments of 1.0 unit from -30.0 through -18.0. The default
settings are according to the chosen Loudness Standard :
• ITU BS.1770-3: -24.0 LKFS (The default value of -24.0 LKFS
indicated in ITU BS.1770-3 isn’t part of the standard. However, it
is the value recommended by ATSC A/85, and it is chosen for the
purpose of this control as a starting point and may be. It can easily
be changed as required.)
• EBU R128: -23.0 LUFS
• LRA Window: Rotating this knob increases or decreases the LRA
(Loudness RAnge) Window . The possible values range from 9
seconds (default) to 3 hours.
• Loudness Clusters: Pressing this control proceeds to the Loudness
Clusters Menu. Refer to Loudness Clusters Menu on page 116. From
this menu, you will be able to determine which loudness channel
clusters will display loudness when selected.
• Alarm: Rotating this knob will select possible visual alarm
indications on the Loudness Screen , relative to loudness of the
Save / ExitHelp Cancel
Loudness
Clusters
Loudness
Standard
EBU R128 (+9 Scale)
Loudness Measurement Menu
Reference
Level
LRA
Window
-23.0 LKFS
9 Seconds
+/- 1 LU
Alarm
Tolerance
ContinuousManual
Mode
OffOver
Alarm
BothUnder
Momentary
Short Term
Custom: 3 Sec
Loudness
Window