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JFC-180BB
When the setup of [Speed Source] is
[NMEA], the correction will be performed
in value. (Setup range: - 10.0 ~ 10.0)
As for the confirmation of boat's speed
data input source, see 5.9, "Changing of
Speed Source", p 5 - 4.
5. Press
to close the menu.
5.12.5 Adjustment of transducer's gain
Correct - Gain (TD)
At inner-hull installation, the insufficient
gain due to ultrasonic signal attenuation can
be corrected.
Caution: The set value of gain
(TD) varies depending on the
materials of bottom of the ship
and the processing method. In
some cases, low frequency side
cannot be used due to too much
attenuation of ultrasonic signal
at ship's bottom.
1. Press
.
2. Select [Correct] - [Gain (TD)].
3. Press [►] of
The screen will turn to the gain (TD)
adjustment screen and displays the gain
(TD) setup box at the upper side of the
screen.
4. Setup the Gain (TD) by turning the gain
knob, which are lighted red or green, at
the side to be adjusted.
7ZPNA4619A
.
Chapter 5 System Setting
When a red square mark appears at right
side upper corner of the Gain (TD) setup
box, the red lighted gain knob shall be
operated. When there is a green square
mark, turn the green lighted gain knob.
This part is lighted red or green
The setup value shall be adjusted so that
the white line to indicate sea bottom
becomes the same thickness through the
whole screen.
5. Pressing the gain knob at the side to be
adjusted a few times, move to the
position of the Gain (TD) box to be
adjusted. (The red mark at right top side
will move)
When there are more than 2 screens,
press the gain knob at the screen to be
adjusted. The gain knob pressed will turn
red. (The center screen of 3 screens will
be the right side screen)
6. Press
to close the menu.
5.12.6 Adjustment of Power Supply
Frequency
Correct - Power Supply Freq
As echo sounders' images may have noise
due to influence of frequency transmitted
and received and frequency of power supply,
the frequency of power supply can be
adjusted to reduce the noise.
1. Press
.
2. Select [Correct] - [Power Supply Freq].
3. Press [►] of
The setup box of [Power Supply Freq] will
be displayed.
4. Pressing [▲] and [▼] keys, setup power
frequency.
.
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付録
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