Echogram is fixed and blue

The echogram displayed in Scala2 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 Mosa2, click Trawl Explorer > Ping Down Frequency and check that the frequency is between 120-210 kHz for a Door Sounder.
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 Door Sounder or Bottom Explorer (Door Sounder with target strength calibration).
2. If not, from Door Sounder or Bottom Explorer sensor data, click + hold Range of Sonar Data and drag it to the page.

The sounder in the transducer is damaged.

• Contact the support service for repair.