Transducer Frequency Adjustment; Demonstration Mode - Furuno CH-250 Operator's Manual

5.4.10 Transducer frequency adjustment

If the CH-250 is receiving interference from a video sounder or other sonar on board your ship,
adjust the frequency of the CH-250's transducer to reduce the interference.
FREQ SHIFT
: CHANGE

5.4.11 Demonstration mode

The demonstration mode provides a simulated sonar picture which helps you become
acquainted with how your sonar works. Connection of the transducer is not required. All controls
are operational.
1. Display the SYS menu.
2. Select DEMO MODE.
3. Press to open the menu.
DEMO MODE
: CHANGE
4. Select OFF or ON as appropriate and press the [MENU] key. (DEMO) appears at the top of
the screen when the demonstration mode is active.
** TX FREQ ADJUST **
: 60.0 kHz (57-63 kHz)
MENU: END
Figure 5-21 TX frequency adjustment menu
** DEMO MODE **
: OFF
MENU: END
Figure 5-22 Demo mode menu
ON
5-21