User's Manual
Table Of Contents
- Section 1 - General Information
- Section 2 - The Radio Menu (MENU)
- 2-1 The Radio Menu Options (MENU)
- 2-2 Show Weather, SNR or Happy Fish on Handset (INFO DATA)
- 2-3 Maintain Your Buddy List (BUDDY LIST)
- 2-4 Local or Distance Sensitivity (LOCAL/DIST)
- 2-5 Backlighting (BACKLIGHT) and Contrast (CONTRAST)
- 2-6 GPS Data and Time (GPS/DATA)
- 2-7 GPS Simulator (GPS SIM)
- 2-8 Reset to Factory Defaults (RESET)
- 2-9 Subscribe or Un-Subscribe the 705 handset (HS SETTING)
- Section 3 - Radio Setup Menu (RADIO SETUP)
- 3-1 The Radio Setup Menu Options (RADIO SETUP)
- 3-2 Select the Channel Bank (UIC) (US only)
- 3-3 Change Channel Names (CH NAME)
- 3-4 Ring and Beep Volume (RING VOLUME and KEY BEEP)
- 3-5 Internal Speaker Connections (INT SPEAKER)
- 3-6 Set the Priority Channel (WATCH MODE)
- 3-7 Weather Alert (WX ALERT) (US only)
- 3-8 NMEA or NAVBUS protocol (COM PORT) (721 / 725 only)
- 3-9 Barometric Displays (BARO SENSOR)
- 3-10 Temperature Display (TEMPERATURE)
- 3-11 HAPPY FISH Alarm ON or OFF
- Section 4 - DSC SETUP Menu
- 4-1 What is DSC?
- 4-2 DSC SETUP Menu Options
- 4-3 Check Your User MMSI (USER MMSI)
- 4-4 Maintain Your Groups (GROUP SETUP)
- 4-5 Response to Individual Calls (INDIV REPLY) (US only)
- 4-6 ATIS MMSI & ATIS Functionality (EU only)
- 4-7 DSC Functionality (DSC FUNC)
- 4-8 Response Type to LL Polling Calls (LL REPLY)
- 4-9 Mute the Notification Ringtone
- Section 5 - Send and Receive DSC Calls
- 5-1 The DSC CALL Menu Options
- 5-2 Call an Individual (INDIVIDUAL)
- 5-3 Call the Most Recent Caller (LAST CALL)
- 5-4 Call a Group (GROUP)
- 5-5 Call All Ships (ALL SHIPS)
- 5-6 Call using the Call Log (CALL LOG)
- 5-7 Call using the Distress Log (DIST LOG)
- 5-8 Request the LL Position of a Buddy (LL REQUEST)
- 5-9 Track Your Buddy (TRACK BUDDY)
- 5-10 Receive an All Ships Call (RCV: ALL SHIP)
- 5-11 Receive an Individual Call (RCV: INDIV)
- 5-12 Receive a Group Call (RCV: GROUP)
- 5-13 Receive a Geographic Call (RCV: GEOGRAPH)
- 5-14 Receive a Polled Position Call (RCV:POSITION)
- Section 6 - Distress Calls
- Appendix A - Technical Specifications
- Appendix B - Troubleshooting
- Appendix C - VHF Marine Channel Charts
- Appendix D - EU Inland Waterway Channels
- Appendix E - MMSI and License Information
- Section 7 - Install the Explorer 721/725
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Northstar Explorer VHF Series: 721/725 Operation and Installation Manual
Appendix B - Troubleshooting
1. The transceiver will not power up.
A fuse may have blown OR there is no voltage getting to the transceiver.
a) Check the power cable for cuts, breaks, or squashed sections.
b) After checking the wiring, replace the 7 Amp fuse (a spare fuse is supplied).
c) Check the battery voltage. This must be greater than 10.5 V.
2. The transceiver blows the fuse when the power is switched on.
The power wires may have been reversed.
a) Check that the red wire is connected to the positive battery terminal, and the black wire is connected
to the negative battery terminal.
3. The speaker makes popping or whining noises when the engine is running.
Electrical noise may be interfering with the transceiver.
a) Re-route the power cables away from the engine.
b) Add a noise suppressor to the power cable.
c) Use resistive spark plug wires and/or use an alternator whine filter.
4. No sound from the external speaker.
a) Check that the external speaker cable is physically connected.
b) Check the soldering of the external speaker cable.
5. Transmissions are always on low power, even when high (HI) power is selected.
The antenna may be faulty.
a) Test the transceiver with a different antenna.
b) Have the antenna checked out.
Insufficient battery power.
a) check the battery wiring to the radio.
b) check the battery voltage.
6. Battery symbol is displayed.
The power supply is too low.
a) Check the battery wiring to the radio.
b) Check the battery voltage.
7. No position information is displayed.
The GPS cable may faulty or the GPS setting may be incorrect.
a) Check that the GPS cable is physically connected.
b) Check the polarity of the GPS cable.
c) CheckthebaudratesettingoftheGPSifapplicable.Thebaudratesettingshouldbe4800forNMEA
or38400forNAVBUS.ParityshouldbesettoNONE.