2. SYSTEM MENU
28
[
Zero Line Area
]: This fea-
ture adjusts the transmission
line so that the transmission
line disappears when the
menu item [Zero Line Rejec-
tor] is turned on. For a long tail, increase the
value. If the transmission line does not disap-
pear, lower the TX power.
[
Bottom Detect
]: In some in-
stallations the tail of the TX
line or the echo afterglow can
be mistaken for the bottom
echo. If this occurs, raise this
setting to solve the problem. Too low a setting
may prevent display of the bottom echo.
[
Bottom Level
]: In the default
bottom level setting (+0), the
equipment judges consecu-
tive strong echoes to be bot-
tom echoes. If, in that setting,
the depth indication is unstable, adjust the
bottom level. If vertical lines extend upward
from the bottom echo in the bottom lock dis-
play, lower the bottom level to erase the verti-
cal lines. If the level is too low, however, it
may be difficult to distinguish bottom fish from
the bottom echo.
2.7
Transducer Menu
[
Type
]: Select the transducer. See section
4.11.
2.8
Demo Menu
[
Demonstrate
]: The demonstration mode
provides, without connection of the transduc-
er, simulated operation of the equipment, us-
ing internally generated echoes. All controls
are operative. The message [DEMO] appears
at the bottom right corner on the screen when
the demonstration mode is active.
[
Off
]: Deactivate the demonstration mode.
[
On
]: Activate the demonstration mode.
Bottom lock display
AUTO_R
G:AF
AUTO_R
G:AF
BL-LF
BL-LF
x1
x1
0.0
0.0
0
10
20
30
40
0
10
20
30
40
5
4
3
2
1
0
5
4
3
2
1
0
21.7
21.7
m
m
Bottom
Set the bottom level so that these vertical lines
just disappear.
Summary of Contents for FCV-588
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