Simrad SN90, Operator'S Manual

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The ping rate is normally limited by the maximum range settings. It will also
be dependant on hardware issues. This may be, for example, how fast your
Processor Unit can handle the information from each ping, how fast your system
communicates with external peripherals, or how long time the system uses to save
data.
4 Set
Tx Power
to Maximum .
Result
The SN90 is now transmitting acoustic pulses ("pinging") into the water.
Related topics
Starting normal operation, page 26
Adjusting the radius of the search area
Some echoes are close, others are further away. It is often necessary to adjust the radius
of the search area. On the SN90, this is referred to as
range .
Context
The
Range
setting defines how "far" you wish the SN90 to detect echoes. In other
words, you specify the horizontal or vertical distance from the vessel to the outer edge
of the search area.
Note
The range value selected and shown is by default only used by the active view.
Even though you can choose a large range value, that does not mean that you can detect
your targets on the same range. The range value only defines the range that is shown in
the views. Actual target detection will always depend on the operational environment,
such as water temperature, salinity, interference and layers in the water column.
The selected range is divided into identical distances. These are shown as dotted circles.
They are referred to as
range rings .
Procedure
1 Click in the view you want to activate.
The active view is identified with a thicker border. Unless you use the
Apply to all
function, all changes you make will only be applied to this view.
2 Turn the relevant rotary switch to make the adjustment.
Getting started