Larson Davis SoundAdvisor 831C Reference Manual page 129

SoundAdvisor Model 831C
The G4 LD Utility also provides a simple, file transfer-style interface for
TAKE NOTE
configuring, saving, and transferring Setup files to your PC or to another meter.
For more information, refer to the G4 LD Utility Manual.
Step 2
Highlight the name of the Setup you want to configure with Event History.
If your Setup includes Continuous Run Mode on the Control tab, see
TAKE NOTE
below to predict how events will be logged when they persist from one
17.1
Auto-Store Period into the next.
Step 3
Press the top-left softkey (
Step 4
If needed, edit the Trigger Source, and Trigger Level values.
• For more information about setting advanced event triggers, such as
using Running Leq, and 1/1 and 1/3 octave event triggers, see 17.4
"Setting Advanced Event Triggers" on page 17-6 before continuing.
Step 5
Press the top-left softkey (
Step 6
Select the checkbox in-line with Event History, and enter values for the Min/
Cont Duration.
About the Minimum Duration: To prevent many small events of short
duration, you can select a Minimum Duration. This is the length of time in
seconds that levels must exceed the trigger levels to be labeled an event. This
value can be 60 seconds or less.
If you are using this feature with Sound Recording, there are constraints on
TAKE NOTE
your Minimum Duration. See
About the Continuation Period: A noise event is initiated when the sound
level exceeds the trigger level or levels you define. There may be situations
where the sound level drops below the threshold level for a short period
before exceeding them again. Statistically, if you want to consider this a
continuation of the first event rather than a new event, you can set a
Continuation Period. This is the length of time in seconds following an event
where the measured sound level can dip below, then exceed the threshold
level again, and still be statistically considered part of the initial event. This
value must be 9 seconds or less.
However, if the measured level drops below the threshold level and remains
below it during the continuation period, the sound event is considered
complete.
Step 7
Select Level or Dynamic from the Trigger Method drop-down menu.
For more information, see
LEARN MORE
Triggering.
Step 8
If desired, enable Event Time History, and choose values for the following
optional settings as shown in Figure 17-2:
Setting Up the Event History Measurement
*//
) until the Event Triggers tab displays.
*//
) to navigate to the Event History tab.
18.3.1 About Sound Recording
17.5 Understanding Level and Dynamic
Table
Constraints.
17-2