JRC JFS-280, Инструкция по эксплуатации

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3 Operating procedures 3-6
3
Setting the image range: [RANGE], [Tilt angle], and [GAIN] 3.1.2
1. Press the [RANGE +] key and the [RANGE -] key to change the scan range.
Press the [RANGE +] key to increase the range.
Press the [RANGE -] key to decrease the range.
The range can be switched between 16 ranges. You can also select from four types of
ranges.
Refer to the other initial settings and range setting items for details about range settings.
2. Set the tilt angle with the [Tilt angle] knob.
Turn it to the left (counterclockwise) to make the sonic beam's tilt angle shallower (toward
the sea's surface).
Turn it to the right (clockwise) to make the sonic beam's tilt angle deeper (toward the sea
floor).
The tilt angle can be incremented in steps of 1° from -5° to 60°.
●
Changing the tilt angle allows you to detect schools of fish from the surface to the floor
of the sea.
●
To set the tilt angle, consider the depth of your target fish, the depth of the water and
the speed of your ship when you are fishing.
3. Turn the [GAIN] knob to adjust the image's output.
Turn it to the right (clockwise) to raise the gain.
Turn it to the left (clockwise) to lower the gain.
●
Consider the noise and the type of fish you are trying to catch when you set the gain.
－
5 °
０
°
60
°
Tilt angle
Sea floor
俯角
30 °
Display of the tilt angle
Tilt angle