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Sensor Configuration
Learn how to configure the sensor settings.
Configuring the Echo Sounder
Configure the echo sounder settings of the Trawl Navigator.

Sensor Configuration
Learn how to configure the sensor settings.
- Connecting the Sensor to Mosa2
  To configure the sensor, you need to connect it to Mosa2 application, using either the Dock or the Configuration Cable.
- Battery Information
- About the Virtual Water-Switch Option
  Mosa2 has a virtual water-switch option that changes the conditions under which the sensor is running.
- Diagnostic Information
  Scala2 and Mosa2 applications warn the user in case of water ingress in the sensor.
- Configuring the Trawl Node
  You need to give a trawl node to the sensor. It is the number corresponding to the position of the sensor on the trawl.
- Configuring the Uplink Frequency and Power
  Configure the settings of the communication link between the sensor and the vessel.
- Configuring the Echo Sounder
  Configure the echo sounder settings of the Trawl Navigator.
- About the Automatic Range Mode
  The sensor has an automatic range mode that is useful to get better quality echograms when the trawl is close to the bottom.
- Applying Offsets to Measurements
  You can apply offsets to temperature and depth measurements if the measured values does not correspond to the environment of the sensor.
- Testing Measures
  You can test the measures taken by the sensor (e.g. battery level, temperature, depth) to check that there are no faults.
- SD Card Recording
  This topic explains the SD card recording feature (this feature is optional).
- Saving a Configuration on Mosa2
  You can save different configurations of the sensor to be able to quickly change the configuration when you change your fishing method.
- Exporting Sensor Configuration
  You can export the sensor settings you configured on Mosa2 on a file. You can afterward use this file when configuring a similar sensor.
- Importing a Sensor Configuration
  You can apply to a sensor a configuration that has already been made on another sensor.

Configuring the Echo Sounder

Configure the echo sounder settings of the Trawl Navigator.

Procedure

Go to the Echo Sounder page.
To select the direction of the sounding, click in Sounding Mode, then choose a Mode between Down or Up.
Go back to the page, then click in Down Sounding or Up Sounding, depending on the Sounding Mode that was configured.
Set the Frequency (Hz) at:
- 165,000 Hz if XL or stubby bottle (if you notice noise on the echogram, you can put 210,000 Hz to not interfere with the uplink signal of the sensor or other sensors.)
- 100,000 Hz if XXL bottle
The Range (m) of the sounding is the maximum distance at which targets and bottom can be detected.

Note: We recommend to set the maximum range value when using the automatic range in order to see the sea bottom as soon as possible.
The Pulse Type is automatically set, depending on the echogram range:
- 5 to 20 m: 100 μs
- 40 m: 200 μs
- 80 m: 300 μs
- 160 m: 500 μs
Select a TVG setting to compensate the signal loss in water and have targets or sea bottom displayed in the same color on the echogram, whatever the distance from the sensor:
- 20 log: focus on bottom or school of fish.
- 40 log: focus on individual targets.
- 30 log: compromise between the two above settings.
Set the Detection Threshold (dB TS) to -79 if you want to detect small targets. Otherwise, leave the default settings at -73 dB.
Do not change the other echo sounder settings.