Humminbird DC 25 - Manual (Page 8)

The microphone button controls whether you are receiving or transmitting. Depress the
microphone button and speak clearly into the selected channel. When the microphone button is
not depressed, the radio remains ready to receive signals.
Note: Your DC-25 complies with new FCC regulations, which require the radio to disable the
transmitter after 3 minutes of continuous transmission. This should only occur if the microphone
button is stuck down. During this time, the speaker will emit a repeated beeping tone and the
channel number on the LCD will flash. Click your microphone button several times in an attempt
to free the stuck button. If the button doesn’t clear, or if the problem occurs again, please return
the radio to the Humminbird factory or to an authorized service center.
THE LCD SCREEN
The Humminbird VHF radio’s LCD screen keeps you informed of the current state of the
communications set-up.
HI or LO indicates whether you are set to transmit at the maximum legal wattage for the current
channel, or at the lower 1 watt of power.
The T transmission symbol blinks when you are transmitting (that is, when the microphone button
is depressed).
The large numeral appearing at the center of the screen shows the current channel selection.
SCAN appears when the scan function is enabled.
DUAL appears when the dual watch function is enabled.
WX illuminates when you are receiving in the Weather frequency band.
USA illuminates when the USA frequency band is selected.
OPERATING THE VHF RADIO
The controls, switches, and displays on the Humminbird VHF radio function as described in the
previous pages. The following examples are provided to further acquaint you with communication
operations.