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Installation Manual
10.1.6Commissioning Step 5: Electrical Noise
1
Open a Sonar display as a full screen display. See Operator’s Manual “5.1 Sonar View”
on page 32.
2
On the Menu Task Bar, set the Range Knob to manual (double click switches between
auto and manual, manual being yellow) and change the range dial to 90 m. Double click
on the Sonar display to ensure all 90 metres are displayed.
3
On the Menu Task Bar, set the Gain Control Knob to manual (double click switches
between auto and manual, manual being yellow) and change the gain to 30.
4
Double click on the Gain Control Knob
To adjust the minimisation and the clutter for a clearer display, access Advanced
Options, by double clicking on the Gain Control button.
.Figure 40. Advanced Options
If possible do this test at rest with the engine out of gear and with all other sounding
devices off.
Check the centre line of the Sonar display for a consistent signal or a consistent pulse
down a radial line. If present this is evidence of noise signals common to all channels.
If this noise can be clearly seen as more than a faint blue-white vertical line on the
display, it is likely that all of the receiver channels are picking up electrical noise. If the
display is relatively clean move to the next test. The most likely cause of noise problems
is incorrect termination of the transducer cable grounding and screening. Ensure a
low gauge grounding wire is attached to a solid ground which is common to the power
supply ground.
Doc. P/N: WSP-009-005
Version:
V1.2
Issue Date: August 2012
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