Explorer 725 / 705 VHF Marine Radio Quickstart Guide www.northstarnav.
This Quickstart Guide is to be used with the Northstar Explorer 721 VHF Radio Installation and Operation Manual. The Explorer 721 and Explorer 725 function identically except for where noted in this QSG. Consult the Installation and Operation Manual for further information on the options described in this Quickstart Guide, and for information on other options; including radio setup and different DSC call types and options, troubleshooting, and channel charts.
FCC Statement Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a normal installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
Check out your Explorer 725/705 model There are slight variations in the keys between the Explorer 725US and 725EU models, and some features are not available on both models. An optional handset can also be purchased and used with your Explorer 725. There are two versions - the Northstar 705US handset (for use with the Northstar 725US model) and the Northstar 705EU handset (for use with the Northstar 725EU model).
Turn the unit ON/OFF and adjust the volume 1 To turn the base unit ON, turn the VOL knob clockwise. Turn counter-clockwise to turn the base OFF. 2 Continue to turn until a comfortable volume is reached on the base speaker. Base Unit 1. Ensure the handset is fully charged, and the base unit is turned ON. 2. To turn the handset ON, press and hold the button. To turn the handset OFF, press and hold again until the unit turns off. 3.
Adjust the Squelch Base Unit 1 Turn the SQL knob fully counterclockwise so that random noise is heard. 2 Turn SQL slowly clockwise until the random noise disappears. 3 Make another 1/4 turn clockwise for best reception in normal open sea conditions. In areas of high noise (eg close to large cities) reception may improve if sensitivity is reduced. Try turning SQL slowly clockwise or use the LOCAL setting (see the Installation and Operation Manual). Adjust the squelch with the the handset.
Enter Data using Alpha-mic (721EU only): To enter data, use the alpha-numeric keypad on the microphone to enter the channel numbers and names directly. Each key has functionality shown below. Use the CLR key to backup and the ENT key to confirm, or just wait for the cursor to advance automatically to the next position when entering data (similar to mobile phone operation). To correct data errors, press CH then select the < backup character on the LCD. Press ENT to backup one space at a time.
Set the Backlighting Levels Base Unit Optional Handset 1 Hold down 2 Scroll through the menu listing to BACKLIGHT. 3 Press 4 Press CH or CH to select the desired backlight level. There are 8 levels. 5 Press ENT or push the rotary knob to store the setting. 1 Hold down 2 Scroll through the menu listing to BACKLIGHT. 3 Press 4 Press or to select the desired backlight level. There are 8 levels. 5 Press CALL MENU or push the rotary knob. ENT ENT to show the Radio Menu.
How the microphone and optional handset work together Use the Intercom or Conference mode The Intercom mode works ONLY when one or two optional handset(s) are installed. 1 Base Unit and Optional Handset Hold down WX or IC or H/L to enter IC IC INTERCOM or CONFERENCE mode. Conference mode is only available when 2 handsets are connected, and is used to connect all 3 units together. This disables the radio receiver except for incoming DSC calls.
High and Low Power 1 2 Microphone and Optional Handset Press H/L or H/L to toggle between HI IC (High) and LO (Low) (25W or 1W) transmission power for the entire channel bank. A beep sounds and the selection is shown on the LCD. If HI power cannot be used with a particular channel, the annunciator automatically goes to LO power. If you press H/L or H/L again, an IC error beep sounds. H/L H/L IC Priority Channel Channel 16 and HI power are automatically selected at power up.
Select a Favorite Channel 1 Press 3CH to toggle through each of the three favorite channels until the desired channel is shown. 3CH Base Unit and Optional Handset Store 3 Favorite Channels Base Unit and Optional Handset 1 Select the channel. 2 Hold down 3CH to store this channel as your first favorite channel, CH1. 3 Repeat to store your second favorite channel as CH2. 4 Repeat again to store your third favorite channel as CH3.
Select ALL SCAN mode 1 Hold down SCAN to start scanning all channels (and the priority channel every 1.5 seconds). NOTE: In some European countries, scanning is not allowed. When a signal is received, scanning stops at that channel and BUSY appears on the LCD. Press ENT to skip over an ‘always busy’ channel and resume scanning. Base Unit and Optional Handset 2 Press SCAN SCAN to stop at the current channel. Select the Channel Bank (725US ONLY) Base Unit and Optional Handset to show the Radio Menu.
Make a call to an individual 1 2 3 4 Base Unit and Optional Handset 5 6 Press CALL to show the DSC CALL Menu. MENU The cursor is at INDIVIDUAL. Press ENT or push the rotary knob. Select either: MANUAL NEW to call someone who’s not in your buddy list, then enter their MMSI and press ENT or push the rotary knob. or scroll through the buddy list to find name of the buddy you want to call, then press ENT or push the rotary knob. Select the working channel and press ENT or push the rotary knob.
Make a DSC Distress Call 1 Open the red DISTRESS cover. If time is available to specify the nature of the distress, press and release the DISTRESS key to show the categories. Scroll to your category then press ENT or push the rotary knob. 2 Hold down the DISTRESS key for about 3 seconds until you see the message DISTRESS CALL SENT on the LCD. 3 The LCD flashes and loud beeps sound.
Charging your 705 Handset To charge the handset: 1. Connect 12VDC source to the handset charger cradle 2. Place the handset into the charger cradle. The handset display will show the text: “POWER ON CONNECTING” and then “CHARGING” 3. Leave on charge for at least 3 hours. 4. When the battery is fully charged, the display text will change to “BATTERY FULL” 5. The handset can remain in the charger. To check the handset battery level: Optional Handset 1. Press and hold the ESC key 2.
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