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1. OPERATION
9
1.6 How to Select a Range
The range can be set either manually or automatically. In the auto mode, the range will self-adjust
to provide as clear as possible an image. The auto mode is cancelled when the range is manually
adjusted.
There are eight basic ranges available.
Press RNG+ or RNG- to change the range.
In cases where the depth goes outside the display area, adjust the range scale until the seabed
appears near the center of the screen. (See section 3.1.)
1.6.1 How to enable/disable auto range
1. Press the MENU/ESC key to open the Main menu.
2. Select [Sounder] using S or T, then press the ENT key.
3. Select [Auto Range] using S or T, then press the ENT key.
4. Select [ON] or [OFF] as appropriate, then press the ENT
key to apply the setting.
5. Press the MENU/ESC key twice to close the menu.
1.7 Gain
Note: To manually adjust the gain, you must first turn [AUTO
GAIN] off. The figures shown in this section are of a dual
transducer configuration. Single transducer configuration
pop-up menus will change slightly.
1.7.1 How to adjust the gain
1. Press the MENU/ESC key to open the Main menu.
2. Select [Sounder] using S or T, then press the ENT key.
3. Select the appropriate transceiver ([FE-8020 No.1] or
[FE-8020 No.2]) using S or T, then press the ENT key.
4. Select [Manual GAIN] using S or T, then press the ENT
key. This will open a pop-up window.
5. If using a single transducer configuration, skip to step 7.
For dual transducer configuration go to the next step.
6. Select [AFT] using W or X.
The available settings are [0] to [9].
7. Adjust the gain using S or T, then press the ENT key to select [FORE].
8. Adjust the gain for [FORE] using S or T. The available settings are [0] to [9].
9. Press the MENU/ESC key three times to close the menu.
Properly adjust the gain.
Too little gain gives no picture. Too
much gain shows excessive noise on
the picture. Using the depth data for
navigation when the gain is incorrectly
set can lead to a dangerous situation.
CAUTIO
CAUTION
The FORE/AFT bar is absent in
single transducer configurations.