Page 54 of 68
Doc. P/N: WSP-009-002
Version: V2.3
Issue Date: July 2014
Installation Manual
www.wassp.com
Figure 34 – Side Lobe Levels
Full Side Lobe Suppression
Too Much Minimisation
No Minimisation
Light Minimisation
Note: Test 3 is also
required for the sea-floor
detection process to
operate correctly.
Sea Trial - Commissioning Step 11: Side Lobe Levels
Before this test can be done the WASSP system must be operating at the correct
power level.
Set the WASSP system to use Automatic Power, double click the power level display
so that it turns green.
Ensure that Automatic Power By Signal is selected in the Ship Setup - Power Tab.
Wait until the green power level display is set to at least 2.
Open the Advanced Options Controls and move them so that you can adjust the
Minimisation while watching the sonar display area above the sea floor change.
Look at the pictures below in Figure 34.
First set the Minimisation to 0. Then move it up to 1000, 2000,3000,4000 to get
a sense for how the ring shown at the first echo return becomes less and less
noticable. Set the Minimisation at the lowest value at which the ring is not visible.
See the Full Side Lobe Suppression part of Figure 34 below.
If this value required is greater than 5000 then it is likely that something is
wrong. Check that the power level is not too high and that you have followed the
configuration above and Automatic Power by Signal is set. Otherwise re-check the
individual receiver channels for anomalies and check that all Receiver cables from
the transducer are connected into the correct sockets.
