Larson Davis SoundExpert LxT, User Manual

Page: 52 / 307

LxT Manual Measurement Settings Tabs
4-15
Select the data field and use the navigation keys to specify
the start time.
Run Mode with Measurement History
Measurement History requires that
the optional firmware LXT-ENV be
enabled. To measure and store sequences of measurements using the
same setup, either manually or automatically, you can use
the Measurement History feature, which is described in
detail in "Measurement History".
Triggers Tab
Note that the default values for these
parameters are as shown in
FIGURE 4-16. FIGURE 4-16 shows the Triggers tab.
FIGURE 4-16 Triggers Tab
The Triggers tab is used to define trigger levels that can
than be used to detect when the measured sound level (SPL
or Peak) exceeds one of these trigger levels.
Day/Night
The Day/Night parameters are used in conjunction with
Community Noise Measurements that require the optional
firmware LXT-CN to be enabled.
The default values for these
parameters are as shown in
FIGURE 4-17. Among the parameters measured and displayed as part of a
basic sound level measurement are the community noise
descriptors L
DN
and L
DEN
. The Day/Night tab defines the
times and penalties to be used.