Larson Davis System 824, Technical Reference Manual

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7-40 824 Reference Manual 9/29/09
spectra and one other spectra. This setting provides the
following three options:
None - Does not store any spectral data besides the
Leq spectra with the interval.
@Max - Stores the spectra associated with the maxi-
mum broadband level during the interval period.
Min - Stores the minimum level obtained by each fil-
ter. This is a bin by bin minimum level.
Logging SLM Exceedance History Settings
Exceedance History Settings are
only available to the Logging SLM
(LOG) instrument. Exceedance History settings allow you to select what data
will be saved in memory during an exceedance. An
exceedance is defined as an acoustic event characterized by
the instantaneous rms sound pressure level or peak level
(Pk-1 or Pk-2) going above or exceeding a predetermined
level. For further detail see the section "LOG and SSA
Triggering Settings" on page 7-23.
Triggering - (LOG) The Triggering menu defines event triggering used to initiate
an exceedance or event. See “Logging SLM Triggering
Setting” earlier in this chapter.
Excd Enable - (LOG) The Excd Enable setting allows you determine whether or
not exceedance data will be stored in memory when
exceedance trigger conditions are met. This setting provides
the following two options:
Yes
- Exceedance data will be stored in memory when
exceedance conditions are met.
No
- Exceedance data will not be measured or stored
in memory when exceedance conditions are met.
Min Duration - (LOG) The Min Duration setting allows you to determine the
minimum number of seconds an exceedance must last for it
to be logged. This setting can take on any time value in the
following range:
0-255 second