1. OPERATION
12
3. Use
S
or
T
to select TVG and press the
[ENTER] key.
4. Use
S
or
T
to select HF TVG Distance or
LF TVG Distance as applicable and press
the [ENTER] key.
5. Use
S
or
T
to set TVG distance.
100-500 ft: 10 ft intervals
500-1000 ft: 50 ft intervals
1000-3000 ft: 100 ft intervals
6. Press the [ENTER] key. The distance set-
ting value in the TVG window changes to
the one you set.
7. Use
S
or
T
to select HF TVG Level or LF
TVG Level as applicable and press the
[ENTER] key.
8. Use
S
or
T
to set TVG level and press
the [ENTER] key. The higher the level the
less the gain at near distance.
9. Press the [MENU/ESC] key several times
to close the window.
1.15
A-scope Display
This display shows echoes at each transmis-
sion with amplitudes and tone proportional to
their intensities, on the right side of the
screen. It is useful for estimating the type of
fish school and bottom composition.
Note:
In the horizontal split dual frequency
display the A-scope display appears on both
high and low frequency displays. In the verti-
cal split dual frequency display the A-scope
display only appears on the high frequency
display.
1. Press the [MENU/ESC] key to open the
menu.
2. Use
S
or
T
to select Display and press
the [ENTER] key.
3. Use
S
or
T
to select A-Scope and press
the [ENTER] key.
4. Use
S
or
T
to select the A-scope presen-
tation desired and press the [ENTER]
key.
Normal:
Display shows echoes at each
transmission with amplitudes and tone
proportional to their intensities.
Peak:
"Normal" A-scope display plus
peak-hold amplitude picture in dots for
last five seconds.
Default setting for FUNCTION control
