Model 831 Manual Overall Tab 5-17
Lmax
Lmax is the maximum sound level of the highlighted
frequency band. The maximum spectrum is determined by
the Max Spec setting.
Bin Max
When set to Bin Max, it is the maximum value which
occurred during the entire measurement for that frequency
band. Since individual frequency bands may reach their
maximum levels at different times, this spectrum might be
one which never occurred at any instant during the
measurement period.
At Max
When set to At Lmax, it is the instantaneous spectrum at the
moment when the broadband maximum occurred (such as
L
ASmax
).
1/3 Octave Band Analyzer (Optional)
The 1/3 Octave Band Analyzer
display appears only when the
instrument is loaded with the
optional 831-OB3 firmware and this
measurement mode has been
selected in the setup.
FIGURE 5-17 Overall Tab: 1/3 Octave Spectrum
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