Furuno FR-2105-B - Manual (Page 147)

-8.2-
12 nm 9 nm 9 nm
Transmitter: normal
Receiver: normal
Transmitter: 3 dB loss
(Transmitter system has lost a
half of initial power. Suspect
magnetron and feeder system.)
Receiver: normal
Transmitter: 3 dB loss
(Transmitter system has lost a
half of initial power. Suspect
magnetron and feeder system.)
Receiver: 3 dB loss (Receiver
has lost a half of initial
sensitivity. Suspect receiver
front end, water ingress in
feeder system, etc.)