Larson Davis SoundAdvisor 831C Reference Manual page 27

FIGURE 2-7 Under Range vs. Normal Range Data Display
Values in an "under range"
condition display darkly on the
Live tab.
FIGURE 2-8
Measurement Status Icons
SoundAdvisor Model 831C
Under Range Display
OBA Overload Icon
The OBA Overload icon displays while the input to the Octave Band Analyzer is
overloaded.
When the OBA Range property is set to Normal, the OBA Overload Icon
TAKE NOTE
displays at a level 33 dB lower than if the OBA Range had been set to High.
OBA Under Range Icon
When the signal from the preamplifier drops so that the noise level of the
instrument and the preamplifier influence the measurement, an Under Range
condition exists.
When all filters of the OBA are "under range" the OBA Under Range Icon
flashes.
Measurement Status Icons
Display Elements Overview
Normal Range Display
Run
A measurement is currently
running.
Stop
A measurement is stopped.
Reset
A measurement reset has
occurred.
Pause
The present run is paused.
Run Pending
The meter is waiting for
filters and detector
initialization to complete
and will automatically start
the run when the system is
stable (typically less than 10
seconds).
2-15