Kongsberg Simrad ST90, Reference Manual

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Averaging Range
Use
Start Averaging
to select the first sample to be part of the data collection. Use
Averaging Range
to select the number of samples to be included in the data collection.
Scale
Choose the scale of the presentation.
• Select
Automatic
if you want the scale of the presentation to set itself up
automatically.
• Select
Manual
to manually set up the scale of the presentation.
If you choose manual scale you must define the upper and lower limits. Set
Minimum
and
Maximum
to the desired values.
Logarithmic or linear scale can be chosen for the presentation. Logarithmic scale is
normally used since this scale offers the best overview of the complete dynamic range.
A linear scale will enhance the differences closer to the maximum value.
Use the
Colour Scale
setting to select the number of colours in the presentation.
Element Size in Pixels
Use
Element Size in Pixels
to define the width and height of each individual element
in the presentation (in pixels).
Generator
In order to run this test, a built-in signal generator is used. You must specify the
amplitude and frequency to be used by this generator. The signal generator creates a
test signal inserted in parallel with the signal measured on the transducer.
Transmit Pulse
Select
Voltage
or
Current
.
Voltage is always measured during reception. Voltage measurements during
transmission are not reliable. By default, the system measures current during
transmission.
Text lines
Several text lines are provided under the graphic presentation.
1 The upper information text line below the graphic presentation specifies the
current colour scale. The colours used are rated from the weakest (in dB) to the
strongest. If you have selected manual colour scale, the values shown here will
be the same as those selected.
2 Every sample received will have a value representing an echo. This is identified
as a
non-zero value.
Simrad ST90 Reference Manual