• | Operation The Operation function controls the operating mode of the ST90. You can set it to Normal, Replay or Inactive.
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• | Transmission Mode Transmission Mode allows you to control how often the ST90 shall transmit acoustic energy (ping) into the water.
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• | Record Record allows you to record echo data. You can save the data to the Processor Unit hard disk, or onto an external storage device. The data files can be played back on the ST90. You can keep the recorded files for future reference, or for training purposes.
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• | Tx Power Use Tx Power to increase or decrease the output power. The output power is selected from predefined steps.
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• | Audio Select Audio to turn the audio output on or off. The audio information is generated based on the echoes retrieved from the bearing defined by the bearing line. If you need to adjust the volume use the controls on the audio equipment you use.
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