Larson Davis System 824, Справочное руководство

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2-12 824 Reference Manual 9/12/00
The VIEW choices for the SSA instrument type are as fol-
lows:
SLM Sound Level Meter parameters, graphic and
digital display
Any Data Tabular presentation of sound level meter
parameters
RTA Live Live display of real-time frequency spectrum
RTA Leq Display of Leq spectrum over elapsed mea-
surement period
RTA Max Display of the live spectrum corresponding
to the maximum value of sound pressure
level occurring during the measurement
period.
RTA Min The minimum level recorded for each fre-
quency during the measurement.
Intervals Sound Level parameters measured and auto-
matically stored at regular user-defined time
intervals.
Leq Spec-
trum Leq spectra measured and automatically
stored at the interval rate.
Max/Min
Spectra Instantaneous spectrum corresponding to the
maximum sound pressure level occurring
during each of the user-defined time inter-
vals or the minimum level for each fre-
quency as selected by the “Intv Spectrum”
setting.
Time History Sound Level parameters and spectral data
measured and automatically stored at user
defined time periods.
Run Log Displays the start and stop times/dates of the
active measurement.
Ln Centiles L1 - L99 displayed for the measurement
period.
Use the up
u
and down
d
arrows
to select a menu item, right
r
arrow
to enter a submenu and left
l
arrow
to exit a menu.