Furuno Ls4100 - Manual (Page 43)

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GPS WAAS
: Chooses how to use the
WAAS signal when connecting with a
WAAS receiver, for example GP-320B.
Note:
WAAS is currently in the
developmental phase. During the
developmental phase the reliability and
availability of the WAAS signal cannot
be guaranteed. Therefore, any position
data should be verified against other
sources to confirm reliability.
1. Display the Installation menu.
2. Choose GPS WAAS and then press
► to open the GPS WAAS options
window.
Off
WAAS options window
3. Press ▲ or ▼ to choose “WAAS-02”
(test signal). When the system
becomes operational (in 2003), set
to “00” (regular WAAS signal).
4. Turn off the power.
BOTTOM LEVEL:
If the depth
indication is unstable in automatic
operation, or the bottom echo cannot be
displayed in the darkest gray tone by
adjusting the gain controls in manual
operation, you may adjust the bottom
echo level detection circuit, for both 50
kHz and 200 kHz, to stabilize the
indication. Generally, lower the bottom
level for inner hull installation where the
receive level is too low. If the bottom
level is too low it may be difficult to
discriminate fish from the bottom,
resulting in unstable depth indication.
And if the bottom level is too high the
depth indication may not appear.
1. At the installation menu, press ▼ to
choose SET BOTTOM LEVEL and
then press ►. Several seconds later
the following display appears.
Bottom level
+0 (200k: -100 - +100 )
+0 ( 50k: -100 - +100 )
Bottom level display
2. While observing the picture, use ▲
or ▼ to set 200 kHz; ◄ or ► to set
50 kHz. Set up for optimum picture.
3. To restore normal operation, turn off
the power and then it on again.
Note:
The mode must be other than
“NAV DATA” to show the bottom level
display.