Furuno FS-2570 - Page 171

5.8 Antenna coupler, AT-1560
5-54
Short circuit the matching circuit.
(all capacitors: OFF, all coils: ON)
NO
(c)
SWR< 2.0?
(3.36 MHz or less:
SWR<3.0)
TUNE
ERROR
Retry pi matching
(Small change is made.)
TUNE OK
NO
YES
SWR< 2.0?
(3.36 MHz or less:
SWR <
3.0)
TUNE OK
NO
YES
Insert shortening capacito
r
and then retry pi matching.
YES
NO
Change L and C and then retry pi
matching.
SWR< 2.0?
(3.36 MHz or less:
SWR<3.0)
YES
NO
SWR< 2.0?
YES
(d)
TUNE OK
TUNE OK
Frequency
<
3.36 MHz?