Nauticast GmbH NAUTICASTB2 Manual Do Utilizador
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B2 Product Manual 2_0
4 Operation of your Nauticast B2
4.1 Interpreting Status LEDs
Please note that a proper 12 / 24 VDC power suppply is necessary for the B2 to operate flawlessly.
The USB connection will not suffice!
All Class B Devices and hence the Nauticast B2 have a lower priority than Class A devices and base
stations whenever the AIS-channel is highly loaded.
Class B devices send with lower power than class A devices. Therefore a class A device may be
visible to the Nauticast B2, while the reverse may sometimes not be the case.
4.1.1 PWR
A green LED indicates that the unit is connected to an external power source.
NOTE: LED will be a dimmer shade of green on USB power supply as well; however, USB-only
power supply is NOT sufficient for full operation, so make sure 12-24VDC main power is actually
supplied if you want to operate the B2 in normal operational mode (i.e. transmitting AIS data
to other ships)
4.1.2 TX (Timeout)
This LED will show up in amber if the unit has failed to transmit a position report during the last
two reporting intervals.
Reasons for missing reporting intervals might be (examples):
• Message 23 “quiet period”
• A high VDL load
• Positional information unavailable
• Positional information unavailable
• Transmissions disabled
• Irregularities in the power supply (USB power alone is insufficient for sending!)
• Connection problems with one of the antennas
• Unit has not been configured
4.1.3 ERR - Error
An amber LED shows up if the unit has failed its integrity test. The unit is equipped with built-
in integrity tests (BIIT) which is performed in parallel with standard AIS operation.
The BIIT provide the following test functions:
• Receiver monitoring of background noise level – indicates if background noise level
exceeds -77dBm