Kongsberg Simrad SN90 Reference Manual page 562

Purse seine and trawling sonar

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Simrad SN90 Reference Manual

This illustration shows a

typical matrix presentation.

This is a generic illustration.

Any similarities with specific

products are accidental.

When you move the cursor

over the matrix presentation

of the transceiver channels,

each element in the transducer

can be clearly identified as

a rectangle. If you place the

cursor on top of one of these

rectangles, a small yellow

tool-tip will identify key

information. This function is

designed to check the operation

of the individual channels in

the transceiver, as well as the elements in the transducer.

• The identification of the transducer element

• The identification of the transceiver board

• The measured echo value (in dB)

A rectangle with 32 black elements in the matrix view indicates a failure with a single

transceiver board. The tooltip will indicate which board that fails. Restarting the SN90

system will normally fix the problem.

Failure of a number of consecutive transceiver boards indicates a problem with the

power supply.

• Weak signals indicate a problem with the supply power to the analogue amplifiers.

• No response indicate a problem with the supply power to the digital circuitry.

• A failure in the high voltage power supply to the transmitter circuitry can only be

detected in the transmit test.

Select the operating mode of the diagnostic system.

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