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5. MENU OPERATION
5-19
5.4.12 Transducer frequency adjustment
If the CH-270 is receiving interference from a video sounder or other sonar on board your
ship, adjust the frequency of the CH-270’s transducer to reduce the interference.
180.0 kHz (171-189 kHz)FREQ SHIFT :
: CHANGE MENU: END
** TX FREQ ADJUST **
TX frequency adjustment menu
5.4.13 Demonstration mode
The demonstration mode provides a simulated sonar picture to help 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. Choose DEMO MODE.
3. Press ► to open the menu.
OFF ONDEMO MODE :
: CHANGE MENU: END
** DEMO MODE **
Demo mode menu
4. Choose OFF or ON as appropriate and then press the [MENU] key. (DEMO) appears
at the top of the screen when the demonstration mode is active.