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8. MULTI BEAM SONAR DFF-3D
8.1.3
How to adjust the bottom range shift
The bottom range shift feature changes the location at which the seabed appears on
the screen. This is particularly useful when the seabed is "off-screen".
Note: This feature requires [Auto Range] to be active. See your respective Operator's
Manual for details.
1. Open the Home screen, then tap [Settings]→[Multi Beam Sonar].
2. Slide the slide bar at [Bottom Range Shift Area] to adjust the value as required.
The following figure shows some examples of how the settings affect the on-
screen display.
A lower value places the seabed at a higher location on-screen. A higher value places
the seabed at a lower location on-screen.
Seabed
8.1.4
How to change the transmission rate
You can adjust the rate at which the sonar beam is transmitted using one of the three
available settings. Each setting has distinct characteristics allowing for a broad range
of applications.
[Manual]
[Auto]
[Maximum]
1. Open the Home screen, then tap [Settings]→[Multi Beam Sonar].
2. Tap [Transmit Rate Mode].
3. Tap [Manual], [Auto] or [Maximum] as required.
4. If you selected [Manual], adjust the rate at [Transmit Rate Manual Value], using
the slide-bar or the software keyboard. For [Auto] or [Maximum], go to step 4.
Note: Adjustments made to the transmission rate also affect how the on-screen dis-
play appears for the Multi-Sounder and 3D Sounder History features. The following
figures show examples of the same object and how the echo display is affected.
8-2
30
30
Setting
Affected by the selected range. A shorter range has a
faster transmission rate; a longer range has a slower rate.
Affected by vessel speed. Slow speeds have a slower
transmission rate; high speeds have a faster rate.
Note: Speeds of 20 kn or higher are fixed at a transmis-
sion rate of 20.
Affected by detected depth. Shallows have a faster trans-
mission rate; deeper waters have a slower rate.
Note: Where the selected range exceeds the detected
depth, the transmission rate may exceed 20.
50
50
Seabed
Characteristics
70
70
Seabed
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Troubleshooting
