JRC JFS-280, Instruction Manual

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5 Adjusting How Images Appear 5-12
5
beam is widened.
Operating Procedure Press the keys "7 → 2 → 4" to go to V BEAM settings
Press the [MENU] key to display the menus.
Turn the [MULTI] knob to move to "7. FISH IMAGE".
Press the [MULTI] knob to open the submenu.
Turn the [MULTI] knob to move to "2. TX". Press the
[MULTI] knob to open the submenu.
Turn the [MULTI] knob to move to "4. V BEAM".
Press the [MULTI] knob to open the settings menu.
The initial value is set to 0.
You can set the values from 0 to 3, in steps of 1, by
turning the [MULTI] knob.
5.2.2.5 Settings for Shading
You can suppress the waveforms of vertical beams for transmission waves. Using 0 generates
a sharp beam.
When detection performance is important, use 0.
Changing and adjusting this value between 1 and 2 is effective when it is hard to judge the
distinction between images and the reflection of the sea surface, even if you lower the tilt angle
during inclement weather and adjust the "STC LEVEL" for the effects of the reflection of the
sea surface. Likewise, changing and adjusting this value between 1 and 2 is also effective
when the sea floor returns a strong false echo when in shallow sea conditions.
Note)
Detection performance may slightly decrease if you increase this value. At the same
time, the width of the vertical beam will become slightly wider.
Operating Procedure Press the keys "7 → 2 → 5" to go to SHADING settings
Press the [MENU] key to display the menus.
Turn the [MULTI] knob to move to "7. FISH IMAGE".
Press the [MULTI] knob to open the submenu.
Turn the [MULTI] knob to move to "2. TX". Press the
[MULTI] knob to open the submenu.
Turn the [MULTI] knob to move to "5. SHADING".