Trawl Explorer | V2 | Servicing and Maintenance
b.
Click again Menu > Receivers.
c.
From the left side of the receiver page, click the name of the sensor.
d.
From the sensor configuration page, click Configure next to Filter.
e.
From NBTE Echograms Filter select Echosounder and Interference Reduction Medium or
High.
Echogram is fixed and blue
The echogram displayed in Scala is completely blue. There is no yellow line moving on top of the
echogram, which means that no sonar data is received.
Sounder frequency may be outside the correct frequency range.
1.
From Mosa, click Trawl Explorer> Ping Down Frequency/Ping Up Frequency and check that
the frequency is between 120-210 kHz.
2.
If not, change the frequency.
You may have dragged and dropped wrong sonar data to the display.
1.
Check that the name of the sensor on the top left corner of the echogram is Trawl Explorer.
2.
If not, from Trawl Explorer in Sensors Data, click + hold Range of Sonar Data and drag it to the
page display.
The sounder in the transducer is damaged.
• Contact the support service for repair.
Pitch and Roll are wrong
Pitch and roll data are wrong: roll is 90° instead of 0 and pitch is not accurate.
The A1 board orientation is not correct.
• Check the orientation of the A1 board inside the sensor: see Selecting A1 Board Orientation on
page 21.
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