Operating Manual | 5 Performing measurements
SONASCREEN
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Revision: 1.0 | 2022-03-04
Scaling mode
Description
Auto
In Auto mode, the sound source is represented that generates the
strongest level within the set frequency band.
Depending on the set dynamic range, the following colors are
assigned to the image areas:
•
Level on upper limit = white
•
Level on lower limit = blue
Smart
Smart mode allows to suppress background noise that might lead to a
diffused image.
The background noise level is continuously determined and increased
by the Crest value (configurable between 5 and 15 dB). This leads to
the dynamic threshold value.
As soon as the level within the selected frequency range exceeds the
dynamic threshold value, the beam picture is displayed according to
the set dynamic range as is the case in the "Auto" scaling mode.
Otherwise, the dynamic threshold value is interpreted as maximum
level.
Subtracting the set dynamic range leads to the threshold below which
the signal is not visible within the beam picture.
To make sure that the represented dynamic range does not protrude into
the background noise, the Crest value should always be higher than the
dynamic value.
Off
Off mode allows for comparisons with a reverence level. The
maximum reference level may be set manually or determined
automatically as follows:
•
Measurement recording: maximum value of the last 10 seconds
•
Measurement analysis: maximum value of the complete
measurement
Procedure
1
In the “Measurement” screen, tap the "Scaling" icon.
2.
Tap the Scaling mode button and select the scaling mode.
3.
Set the available values by slider and/or enter them in the input fields depending on
the selected scaling mode.
Further information
For setting scaling mode and dynamics, please also see the description of the following
screen:
