Furuno Ls4100 manual Waas options window, Bottom level display

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.

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