Furuno GP-1640F, Руководство оператора, Страница: 18 / 108

2-2
2.2 Sounder Display
Description
The figure below shows all indications and
marks which may appear on the normal
sounder display.
SOUNDER
GAIN
RANGE
SNDR
FUNC
SHIFT
MODE/
FREQ
Level
bar
Functions for
soft keys
Variable
Range
Marker
Depth scale
Tx frequency
GPS status
Depth
20
30
40
50
30
20
10
0
Temp.
scale
Water
temp.
Graph
Water
temp.
display
15.0
50k
GPS 3D
54.0
Indications on the normal sounder display
Note:
The water temperature graph can be set
on or off. The temperature scale is fixed
between 20-80°F (0 to 30°C).
The normal sounder display shows either the
50 kHz picture or 200 kHz picture. To switch
between these pictures, do the following:
1. Press the [SNDR] key several times to
show the normal sounder display.
SOUNDER
GAIN
RANGE
SNDR
FUNC
SHIFT
MODE/
FREQ
20
30
40
50
30
20
0
50k
GPS 3D
Normal sounder display
2. Press the MODE/FREQ soft key.
The display changes as shown in the right
column.
RETURN
SELECT
50kHz
SELECT
200kHz
SOUNDER
20
30
40
50
30
20
0
50k
GPS 3D
MODE/FREQ
AUTO CRUISING
AUTO FISHING
MANUAL
Mode/freq window
3. Press the SELECT 200kHz (or SELECT
50kHz) soft key.
4. Press the RETURN soft key to manually
close the window, or wait 10 seconds and
the window automatically closes.
50 kHz picture
The sounder uses ultrasonic pulses to detect
bottom conditions. The lower the frequency of
the pulse, the wider the detection area.
Therefore, the 50 kHz frequency is useful for
general detection and judging bottom
condition.
200 kHz picture
The higher the frequency of the ultrasonic
pulse the better the resolution. Therefore, the
200 kHz frequency is ideal for detailed
observation of fish school.
50 kHz
200 kHz
Comparisons of
transducer frequencies