Eagle 640c 操作指南

79

level in manual mode the unit will continue to use that exact sensitivity
setting until you change it or revert to auto mode.

To adjust sensitivity in auto mode:

1. Press 

|

.

2. The Sensitivity Control Bar appears. Press 

↓ to decrease sensitivity.

Press 

↑ to increase sensitivity. When it's set at the desired level, press

. When you reach the maximum or minimum limit, a tone sounds.

        

Sonar Menu (left) with Sensitivity command selected. The Sensitivity

control bar is shown at right.

To adjust sensitivity in manual mode:

1. Turn off Auto Sensitivity. From the Sonar Page, press 

|

↓ to

|

.

2. Press 

↑ to 

|

 and the Sensitivity control bar appears.

Press 

↓ or ↑ to pick a different sensitivity setting. When it's set at the

desired level, press 

.

To turn Auto Sensitivity back on:
From the Sonar Page, press 

|

↓ to 

|

|

.