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#Sonar getting started
1. Choosing the frequency
In dual frequency mode, choose the frequency with the [▲][▼].
(*The chosen frequency shows in red)
2. Auto/Manual Gain
Press [ENTER] to choose” AUTO/Manual” of Gain.
3. Gain/STC
Choose “Gain” and “STC” with [◀][▶].
4. Controlling Gain
1. Choose the frequency.
2. Choose the gain.
3. Twisting the rotary key to control the gain.
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