User manual HUMMINBIRD DC 25

[. . . ] Ship Station License Any craft equipped with a VHF/FM transceiver (such as your Humminbird VHF radio) is considered a Ship Station, and must carry a current Ship Station License. Your license will state the call sign, which is your craft's identification for radio purposes. Be sure to complete and mail the Ship Radiotelephone License application (FCC Form 506A), provided with your Humminbird VHF radio. You may obtain an interim Ship's Stations license by appearing in person at your local FCC Field Office. [. . . ] Place the microphone in its holder. Installing the Antenna If you have not already done so, install your antenna according to the instructions included with it. For additional tips on mounting locations, see "Installation Location" earlier in this manual. Note: Do not operate the Humminbird VHF radio without a 50-ohm marine band antenna. Humminbird is not responsible for damages caused by operation without an antenna or with an inappropriate antenna. TESTING THE INSTALLATION After connecting your antenna to the Humminbird VHF radio, you're ready to verify that it is properly installed and powered up. Turn the radio volume knob to the right. The LCD screen should light up and display the number 16 (for the preselected Channel 16). Pick up the microphone; press the button on the microphone and keep it pressed as you look at the LCD screen. If the "T" transmission symbol blinks at the left of the channel indicator, the unit is properly powered up and capable of transmission. Complete information on operating the Humminbird VHF radio is provided later in this manual. First, spend a few minutes with the following pages to acquaint yourself with the radio controls. HUMMINBIRD VHF RADIO CONTROLS All features of your Humminbird VF radio are controlled by the front panel knobs and buttons, plus the microphone button. VOLUME ON/OFF turns power to the radio on and off, and controls the volume of both the built-in speaker and any auxiliary speaker connected to the radio. When power is first turned on, the radio is automatically set to Channel 16 (emergency and calling) in the USA frequency band. SQUELCH eliminates background noise when the radio is not receiving a signal and controls the sensitivity of the scan function. CHANNEL selects the channel to use for transmission and reception in the current frequency band (selected with the USA/INT and WX buttons). Turning the knob to the right advances through the channels in ascending order, and turning it to the left selects channels in descending order. Note that some channels have a specific purpose; be sure to see the "Table of Marine Channels" that appears later in this manual. SCAN scans all channels for signals in the selected frequency band. Pressing SCAN causes the radio to begin scanning from the lowest channel, and to lock in on the first channel for which a signal is detected. There are several ways to channel scan: Press the scan BUTTON again, press the microphone button once, or turn the CHANNEL knob. Scanning is also cancelled if you press the CH 16 button. DUAL enables the "dual watch" function, which lets you monitor Channel 16 while receiving on any other channel. The radio switches immediately to Channel 16 of the last-selected frequency band (USA/INT) when a call is detected, then switches back when the Channel 16 call is completed. To cancel dual watch, press the DUAL button again. HI/LO selects the power level for transmission. HI transmits at the maximum legal wattage for each channel, usually 25 watts; LO transmits at 1 watt. Use LO for in-port or short-range communications, HI for longer range communications. Holding the HI/LO button down while transmitting will override the low transmit default on USA channels 13 and 67, and International channels 15 and 17. WX selects the Weather frequency band (Weather Channels 0 through 9), as shown by the WX indicator that appears on the LCD screen. Note that the Weather channels are receive-only; pressing the microphone button when you are in this frequency band turns off the speaker, but transmits nothing. To return to the USA or International band, press WX again. USA/INT selects the USA or International frequency band, which each provide access to Channels 01 through 88 (see "Table of Marine Channels" later in this manual), Use the USA frequency band in domestic waters or for communications within 14 miles of the U. S. [. . . ] To reply to the caller, depress the microphone button and again, speak at a normal voice level. Scanning To use the VHF radio's scan feature, press he SCAN button. The radio immediately begins scanning channels in the currently selected frequency band and will stop at the first channel for which a signal is detected. Scanning resumes from that channel when a signal is no longer present. To cancel scanning, press the SCAN button again, or use the microphone button or CHANNEL knob. [. . . ]