Furuno RC18xx Series User Manual page 17

4. RC1815/RC1825 Equipment Installations
4.4 FS-1570/FS-2570 Installation (Continued)
Refer to Installation Manual, FS-1570 (150W) / FS-2570 (250W)
4.4.4 Antenna Coupler AT-1560-15 or AT-1560-25 (Continued)
4) Remove the antenna coupler top housing by removing the 8 housing screws.
5) Install the control cable (000-130-484) from the antenna coupler to the
transceiver. Cut the connector from the cable and attach the control cable
from TB3, in the antenna coupler, and TB, terminals 1-8, in the transceiver.
When installing the coupler cable in the transceiver, use a razor knife to
cut an opening in the grommet.
(Refer to Pgs. 2-3 through 2-4 of the Installation Manual)
6) Install the coax cable (000-113-360) from the antenna coupler to the transceiver.
Attach the coax cable from TB1, in the antenna coupler, and the T/R ANT port
on the FS-1570/FS-2570 transceiver.
(Refer to Pgs. 2-3 through 2-4 of the Installation Manual)
7) Reinstall the antenna coupler housing using only a couple of the provided screws.
This will allow easier access when testing the unit later in the installation.
4.4.5 DSC/Watch Receiver Antenna
The DSC/Watch Receiver has been incorporated into the FS-1570/FS-2570.
This antenna connection is made to the D.ANT (W/R 1) port. The unit is shipped
for use with a passive antenna.
(Refer to Pgs. 2-4 and 3-10 of the Installation Manual)
Passive Antenna
1) When a passive antenna is used, the impedance must be matched to a 50 ohm
cable, for connection to the FS-1570/FS-2570.
Active Antenna
1) Install the preamp (FAX-5 coupler). Connect a 2.6m whip or 2 to 3 meter long
wire antenna to the preamp.
(Refer to Pgs. 1-11 and 1-12 of the Installation Manual)
2) Ground the preamp to the mounting mast.
(Refer to Pgs. 1-11 and 1-12 of the Installation Manual)
3) Open the transceiver and remove the cover from the W/R (Watch Receiver).
Change J3 from passive to active.
(Refer to Pg. 3-10 of the Installation Manual and the diagram on the inside
cover of the Transceiver.)
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