Antenna Coupler Unit - Furuno FS-1570 Service Manual

5.1.5 Antenna coupler unit

There are two antenna coupler units: AT-1560-15 is for 150W SSB and AT-1560-25 is
for 250W SSB. Both units include the same matching circuit, but AT-1560-25 is
designed for higher voltage ratings. When the system is switched off, the antenna is
grounded via the dummy board. The resin case and the stainless steel case are available.
Board Unit
AT-1560-15
COUP
AT-1560-25
AT-1560-15
DUMMY
AT-1560-25
Type
AT-1560-15-AAS
AT-1560-15-SUS
AT-1560-25-AAS
AT-1560-25-SUS
Fig.5.1.6 Block diagram of AT-1560
Type
Antenna matching, capability of 7 m
05P0528
antenna connection
Same as AT-1560-15, but for high
05P0528A
voltage
05P0543
10Ω+250pF, 100W dummy load
05P0610
10Ω+250pF, 200W dummy load
Code number
000-055-245
000-055-263
000-055-255
000-055-265
5-8
Table 5.1.4 Boards in AT-1560
Function
Table 5.1.5 Type of antenna coupler
Remarks
For FS-1570, resin case
For FS-1570, stainless steel case
For FS-2570, resin case
For FS-2570, stainless steel case
5.1 Configuration
Remarks
FS-1570
FS-2570
FS-1570
FS-2570