JRC JFE-680 -, Instruction Manual

Page: 31 / 86

4. Operation 19
Setting Auto Gain
◎
The setting method of sensitivity is selected.
・
Make GAIN a yellow display, press or the [ENT] key, and select it from the following, set content.
Set content
：
AUTO/MANUAL
AUTO
：
This equipment automatically sets sensitivity. At this time, STC becomes “LONG"
regardless of the setting of “INITIAL>STC" of the menu.
(Refer to 4.5 Initial Setting.)
MANUAL
：
Set it manually with the [GAIN + -] key to the operation panel.
(Refer to 4.1 Basic Operations.)
・
When it is “AUTO", it starts from sensitivity 10 within the range of sensitivity 10
～
20.
・
Select the method by and press the [ENT] key.
Setting Auto Range
◎
The setting method of range is selected.
・
Make RANGE a yellow display, press or the [ENT] key, and select it from the following, set content.
Set content
：
AUTO/MANUAL
AUTO
：
Range changes automatically like sea bottom's being always displayed at 3/5
positions of the lower side of the range scale.
MANUAL
：
Set it manually with the [RANGE + -] key to the operation panel.
(Refer to 4.1 Basic Operations.)
・
When it is “AUTO", it starts from 10m.
・
Select the method by and press the [ENT] key.
Setting FWD/AFT Draft
◎
When using dual frequency mode, draft value is adjustable forward side and after side of the vessel.
・
Make FWD/AFT DRAFT a yellow display, press or the [ENT] key, and the numerical value (initial
value 0.0) is displayed.
・
The numerical value becomes large when key is pressed, and when key is pressed, the
numerical value becomes small.
・
When the setting of the distance finish, press the [ENT] key.