NAUTICAST 300 1001, Руководство по эксплуатации продукта

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B2 Product Manual 2_0
• GPS antenna connection – indicates open or shorted circuit
• GPS module – indicates if module has failed
4.1.4 CH1 and CH2 – channel information
 Two tri-colour LEDs briefly light up (flash), indicating activity of channel 1 and channel 2:
 Green flash: channel has received an AIS message

Amber (red and green): channel is transmitting
 Red indicates the channel is in DSC mode
4.2 Data Port Messages (NMEA 0183)
The data port will output the following:
 Details of relevant AIS transmissions received (VDM messages)
 Details of AIS transmissions sent (VDO messages)
 Details of channel management messages received (VDM messages)
 Alarm messages generated by the BIIT function (ALR messages)
 System notifications generated by the transponder (TXT messages)
 GPS information (RMC, GSA, GSV)
The data port will accept the following inputs:
 Programming information (SSD, proprietary command PNAU)
 Alarm acknowledgements (ACK)
For more information about the interface protocol refer to the latest “PROTOCOL SPECIFICATION”
of the Nauticast B2 or contact our Technical Support Team (see Section: Contact & Support
information).
4.3 Using different antennas
It is possible to use different antennas than the ones provided with the Nauticast B2. For instance,
a combined antenna for VHF and GPS (“combi antenna”) can be used, if there is not enough space
to fit two antennas on the vessel without disturbing other equipment. A combined antenna solution
is available on our website (prod. no.: 1001027 – “AC Marine VHF/GPS-2”).
If other antennas are being used, please take note of the following minimal requierements:
4.3.1 GPS Antenna
The Nauticast B2 has a TNC female bulkhead connector. This port provides a 5V DC feed for an
active GPS antenna, required by the Nauticast B2 unit (i.e. it should incorporate an LNA). Therefore,
the GPS antenna must be an active type using 5V. The antenna must be suitable for marine
applications (index of protection, ruggedness, means of mounting, etc.). An antenna should be
selected with a gain (in dB) depending on the length of cable between the antenna and the AIS unit.
After subtraction of cable and connector losses a minimum total gain of 20 dB should be available
at the Nauticast B2 unit GPS antenna connector. The GPS antenna must be a dedicated antenna,
i.e. not shared with any other GPS receiver. Installation of the GPS antenna is crucial for flawless
operation of the built in GPS receiver, which in turn is used for timing of the transmitted time slots
and for the supply of navigational information.
4.3.2 VHF Antenna
The Nauticast B2 has a UHF female bulkhead connector . The VHF antenna employed for AIS use:
 Must be a dedicated antenna, i.e. not shared with any other VHF transmitter/receiver.
 Must be suitable for marine applications (index of protection, ruggedness, means of
mounting, etc.).
 Should be omni-directional and vertically polarized with unity gain (0 dB) with a bandwidth
sufficient to maintain VSWR <1.5 over the frequency range 156 – 163 MHz. As a minimum
the 3dB bandwidth must cover the two AIS channels and the DSC Channel.
 Should be mounted at least 2 meter apart from any other VHF antenna used for speech or