ATB1 USER MANUAL
10
912S-02692-1.11 18/07/2022
2.2.1 RF Connectors
The VHF antenna should be connected to the SO239 socket.
If the vessel is equipped with a single VHF antenna that is required to be shared between
the ATB1 and a VHF Radio Transceiver it is necessary to use an active antenna splitter.
Attempting to connect two transmitting devices to a single antenna without a splitter will
cause severe damage to either or both devices. Install a third party splitter in accordance
with the instructions provided with that unit, connecting the ATB1 “ANT” connector to the
AIS Input connector on the splitter.
A typical active splitter installation connection is shown in the NMEA2000 example on page
6 of this manual.
!
When a splitter is installed and the VHF Radio is transmitting, the ATB1
is unable to make use of the SOTDMA system and reporting rates may be
longer than those specified for normal operation. For optimum operation a
dedicated VHF antenna is recommended.
The GPS antenna should be connected to the TNC connector.
2.2.2 Power and data connectors
The power and data connections are on the 10-core flying lead supplied.
Connect the power cables to the vessels supply via a suitable fast acting fuse.
If you need to extend the length of the power cable, ensure you observe the following:
•
The power cable for each unit in your system should be run as a separate,
single length of 2-wire cable from the unit to the vessel’s battery or distribu-
tion panel.
•
For power cable extensions, it is recommended that a minimum wire gauge
of 16 AWG (1.31 mm2). For cable runs longer than 15 meters, you may need
to consider a thicker wire gauge (e.g. 14 AWG (2.08 mm2), or 12 AWG (3.31
mm2)).
3 Amp Fast
Acting Fuse