Furuno CH-250 manual 1 COM1 menu description

5.1.1COM1 menu description

TX POWER: Selects transmitter output power to maximum or minimum. The default setting is "maximum." For further details see page 2-12.

PULSELENGTH: Selects pulselength to short or long (default setting). For details see paragraph 2.11.2 on page 2-13.

TX RATE: The Tx rate may be set between 1-10 (default setting: 10) in the case of the internal transmitter, or an external synchronous signal may be used. The higher the number the greater the number of transmissions. For operation in shallow waters, select the Tx rate which displays the second reflection from the bottom between the sea surface and bottom. For use of an external video sounder or sonar, select EXT.

INT REJECT: Turns the interference rejector on or off (default setting). For details, see paragraph 3.11.2 on page 3-11.

AGC: Automatically lowers sensitivity against strong echoes such as those from the bottom and large fish schools to emphasize weak echoes such as those from fish close to the bottom. The default setting is OFF.

AUDIO LEVEL: Adjusts the audio level of the external loudspeaker (option).

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