GME G142FD - Manual (Page 11)

G • F I S H – G 1 4 2 F D I N S T R U C T I O N M A N UA L PA G E 1 1
To set the manual mode in the sonar window:
1 Press MENU, select Range.
2 Select a mode you want and press ENT.
3 If you select the manual mode, press
+
or
–
to change the
value of the max displayed depth.
3-4-5 Gain
The gain menu
The gain is the amount of signal strength received from the
transducer and the threshold is the level of ultrasonic signal
that is ignored by a set value.
When you use the manual mode and threshold, the values of
gain and threshold need to be set very carefully.
In the Gain window, you can set the
gain and threshold.
To change a value:
1 Press MENU, select Gain or press
gain button.
2 Select a mode.
3 If you select a Manual mode, adjust each frequency gain
value by pressing or . If you select the Auto mode,
it will be changed to manual mode if you change the
frequency value.
3-4-6 Sonar window display
Five sonar display windows are available and each display
window has unique characteristics. Select a display window
depending on your needs. The default display is No split.
To change a Sonar display window in the sonar
window:
1 Press MENU, select Window mode.
2 Select the desired sonar display.
No split: Displays Sonar history at a given frequency
(50 or 200 kHz), (see section 3-4-7).
Split zoom: This mode expands a chosen area of the normal
picture in full vertical size on the left-hand side of the window.
Full screen zoom: Displays a zoomed section on full screen
(see section 3-4-8).
Split bottom: Displays Sonar history and a bottom trace
focus in a zoomed section (see section 3-4-9)
Split 50/200: Displays the 50 kHz sonar history on the
left and the 200 kHz sonar history on the right. This display
is useful for comparing the same history with two different
frequencies. (see section 3-4-10).
Split A-Scope: Display Sonar history and echo strength (see
section 3-4-11).
You can change the split
ratio if the window is split.
1 Press MENU and select
Window split.
2 Press or to adjust
the ratio.
3 Press ENT.
3-4-7 No split
No split window displays a sonar history at a given frequency
(50 or 200 kHz)
Low Frequency (50 kHz)
The 50 kHz frequency is ideal for detecting the wider area
which means low frequency is useful for general detection
and judging bottom condition. This frequency is also good for
deeper water.
High Frequency (200 kHz)
The 200 kHz frequency will provide a better resolution which
means it is ideal for the observation of fish or fish schools. This
frequency is also good for shallow water.
To set a frequency for this display:
1 Press MENU.
2 Select Frequency.
3 Select a desired
frequency.
You can also review
old sonar records, press
and to review
the history. To return to
current scanning,
press ESC .
When the set depth
is too low When the set depth
is too high