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Фрагмент инструкции
Use the antennas supplied with this kit. The VHF antenna supplied for use with the Nauticast™-B is omni-directional, vertically polarized with unity gain (0 dB) and a band width sufficient to maintain VSWR <1.5 over the frequency range 156–163 MHz. As a minimum the 3dB bandwidth will cover the two AIS channels and the DCS channel. The antenna is also suitable for marine shipboard applications (index of protection, ruggedness, means of mounting, etc.). If you elect to not use the antenna supplied, the alternate VHF antenna employed for AIS use: . Must be a dedicated antenna, i.e. not shared with any other VHF transmitter/receiver. . Should be mounted with at least a two meter vertical separation distance from any other VHF antenna used for speech or DCS communication. Also see Appendix for warnings such as “Radio Frequency Exposure Warning”. SECTION 3 - USING THE TRANSPONDER 1. Switching ON When the 12V supply is switched on, all four LEDs visible on the front panel of the unit will illuminate twice for a period of one second on each illumination. The blue LED will then go out. When the internal GPS starts outputting valid position information, the red LED will go out. When the Nauticast™-B AIS unit transmits its first position report (message 18), the yellow LED will go out. Note that this process may take up to 30 minutes depending on the switch-on state of the GPS receiver. When the yellow LED goes out the green LED will illuminate indicating that the unit is now operating correctly. 2. Warning and fault states If the unit has not been able to transmit a position report during the last expected two reporting intervals (i.e. the nominal reporting interval cannot be maintained for operational reasons such as a Message 23 quiet period, high channel load conditions, etc.) the yellow LED will illuminate. This is a warning condition only and indicates that your vessel.s position is not currently being reported to other vessels. Reception of other vessel AIS information by the Nauticast™-B AIS is not affected. When the unit is able to commence reporting, the yellow LED goes out. If a fault occurs the red LED will illuminate. This may illuminate briefly if the power supply is interrupted or if the VHF or GPS antenna characteristics are briefly affected. Manual Footer If the red LED illuminates continuously, the unit should be assumed to be faulty. It should either be switched off (power removed) or, if this is not practical, any other vessel position information derived from the unit should not be used. It should also be assumed that the unit is not transmitting valid position information for your vessel. The unit should be examined by a competent equipment maintainer at the earliest opportunity. More details on LED indications can be found in “LED Indicators” (below). 3. Data port messages The data port will output the following: . (At power-up) boot-loader and main application splash text screens including version numbers, and memory status . Details of relevant AIS transmissions received . Details of AIS transmissions sent . Details of channel management messages received . Alarm messages generated by the BIIT function The data port will accept the following inputs: . Programming information . Alarm acknowledgements Please see the ‘Data Interface’ section of this manual for more details of the data port messages. When in operation, an AIS unit: . Uses one of two VHF channels within the international marine band allocation (channel 87B; 161.975MHz, or channel 88B; 162.025MHz) to regularly transmit information such as the vessel position, Maritime Mobile Service Identity (MMSI), name, speed, course, etc. . Receives similar information from other AIS equipped vessels within VHF range and outputs that information for use by an external display medium (AIS enabled chart plotter, PC using AIS enabled chart plotter software etc.) 4. Built-in test The Nauticast™-B AIS unit is equipped with Built in Integrity Testing (BIIT). BIIT tests run continuously or at appropriate intervals simultaneously with the standard functions of the equipment. The BIIT detects any failure or malfunction that will significantly reduce integrity or stop operation of the Nauticast™-B AIS unit. The tests include: . AIS TX malfunction (synthesizer not locked and TX time-out not exceeded) . Antenna VSWR exceeds limit . Rx channel 1 malfunction (synthesizer not locked) . Rx channel 2 malfunction (synthesizer not locked) . Internal GNSS not in use . No valid SOG information . No valid COG information . Background noise > -77dBm . GPS failure . VSWR exceeding the maximum allowed level . The input voltage is out of the specified range 5. LED indicators Power This is a green LED which indicates, when lit, that power has been connected correctly to the transponder, that the transponder hardware has been configured, that the operating software is present, that the CPU has booted up and the application software is running. Manual Footer TX timeout This ...
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