Furuno FR-1500 - Manual (Page 100)

-7.2-
12 nm 9 nm
9 nm
4 arcs starting at 12 nm
Transmitter
: normal
Receiver
: normal
Transmitter
: 3 dB loss
(Transmitter system has lost a
half of initial power. Suspect
magnetron.)
Receiver
: normal
Transmitter
: 3 dB loss
(Transmitter system has lost a
half of initial power. Suspect
magnetron.)
Receiver
: 3 dB loss (Receiver
has lost a half of initial
sensitivity. Suspect receiver
front end, water ingress in
feeder system, etc.)