JRC JFS-280, Instruction Manual

Page: 170 / 328

6 Operation Settings 6-22
6
6.1.8.1 Tilt Step Settings
This section explains the tilt step, which is the tilt steps (changes in angle) that are applied for
every transmission when automatic stepping is set.
Operating Procedure Press the keys "8 → 1 → 8 → 1" to go to TILT STEP
settings
Turn the [MULTI] knob to select "1. TILT STEP". Press
the [MULTI] knob to open the pulldown menu.
In the pulldown menu, "1. 1", "2. 2", or "3. 5" is set.
For this product, we recommend "3. 5" according to the
vertical beam width, when using automatic tilt.
6.1.8.2 Long Distance Tilt Adjustments
This section explains how to set the tilt angle to adjust when a school of fish that was detected
at a distance approaches your own ship.
At a distance, the vertical beam is wide, if, for example, the tilt angle is set to 0
° when a nearby
fish school is detected 800 m ahead at a depth of 50 m, the person operating the sonar needs
to lower the tilt angle because as the fish school approaches 500 m the fish school gradually
shifts out of the vertical beam.
This setting automatically raises or lowers the tilt angle.
If you want this to be done automatically, set this adjustment value.
Operating Procedure Press the keys "8 → 1 → 8 → 2" to go to LONG
DISTANCE TILT ADJ settings
Turn the [MULTI] knob to select "2. LONG DISTANCE
TILT ADJ". Press the [MULTI] knob to open the pulldown
menu.
In the pulldown menu, you can set "-2 to 2".
Set "5. 2" to automatically lower the tilt angle.
Conversely, set "5. -2" to lower the tilt angle to 3
° for
surface schools of fish that are far away.