How To Shift The Range; How To Adjust The Gain - Furuno NAVnet TZtouch2 Operator's Manual

7. FISH FINDER (SOUNDER)
7.5.3

How to shift the range

The basic range and range shift functions let you select the depth you can see on the
screen. This function is not available when [Auto Range] is active.
1. Open the home screen, then tap [Settings] - [Sounder].
2. Tap [Range Shift] to open the software keyboard.
3. Set the range then tap [] to confirm.
4. Tap the close button to finish.
7.5.4

How to adjust the gain

The gain controls how echoes of different strengths are displayed.
Set the gain to show a slight amount of noise on the screen. In-
crease the gain for greater depths and lower the gain for shallow
waters. The figures to the right show examples for gain set too
high, too low and with a proper setting, for reference.
Gain can be adjusted either from the pop-up menu, of from the
data box.
Note 1: This function is not available in the auto mode.
Note 2: Depending on the software version of the sounder, the
gain may be applied to both past and current echoes. However, if
multiple display units are connected, the gain will only be applied
to current echoes if a display unit does not apply the gain to both
past and current echoes.
Adjusting the gain from the pop-up menu
1. Tap the screen to open the pop-up menu, then tap [Adjust].
2. Tap [HF Gain] or [LF Gain]. The gain slide bar appears.
3. Drag the slider to adjust the gain, as shown in the figure below.
LF Gain
Current setting
7-8
LF Gain
50
50
Drag slider
(or tap bar
or +, - icons)
Gain too high
Gain proper
Gain too low