442704/A
551
The reception test validates each single element in the transducer, and returns the
status using a simple colour code.
•
Green
: The transducer element is fully operational.
•
Red
: The transducer element offers reduced performance.
•
Black
: The transducer element is not working ("dead").
For more information, observe the tooltip provided for each element rectangle.
A small number of unserviceable transducer elements are accepted, even for
operational use. This is regarded as "graceful degradation”. The ST90 system offers a
large number of transceiver channels. 000 identical transceiver boards are used. If a
single channel fails during normal operation, you are not likely to detect it. Even if
several channels fail, you may not see it.
The detection of a faulty channel depends on the physical location of the relevant
transducer element. If faulty channels are grouped together on the transducer face, this
may cause a visible defect in the display presentation. If they are scattered, the visible
defect may be a lot harder to see. In all cases, the echoes from the neighbouring
channels cause an interpolation that will restore a lot of the degraded presentation.
Which actions to take if single channels fail depend on the operational impact, the
overall performance of the ST90 system, and a cost/benefit assessment. The most
important factor in the cost/benefit assessment is whether you need to replace the
transducer, or just a single transceiver board. If more than 3% of your transducer
elements have failed, we recommend that you contact your dealer for advice.
Note
For further investigations of this issue, use the functionality offered by the
Element
BITE
(Element Built In Test Equipment) dialog box.
Related topics
Pages in the Diagnostics dialog box, page 543
Setup menu; Functions and dialog boxes, page 452
Testing the noise conditions and the sonar functionality, page 254
Functions and dialog boxes, page 416
Diagnostics dialog box, page 462
Summary of Contents for Simrad ST90
Page 1: ...kongsberg com simrad Simrad ST90 REFERENCE MANUAL ...
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Page 337: ...442704 A 335 Related topics Sonar views page 326 User interface ...
Page 413: ...442704 A 411 Related topics Menu system page 375 Display menu page 384 Menu system ...
Page 631: ...442704 A 629 Related topics Concept descriptions page 626 Concept descriptions ...
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Page 688: ... 2021 Kongsberg Maritime ISBN 978 82 8066 211 8 ...
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Page 690: ...Reference Manual Simrad ST90 ...