Furuno FELCOM 12, Service Manual

Page: 42 / 118

3-2
3.2 Block Diagrams
1. Antenna and Communication Units
DIPLEXER
12 ~ 16dBW (20W)
TX : 1626.5 ~ 1646.5MHz
•
D-FB-CV : 30m
•
8D-FB-CV : 50m
•
12D-SFA-CV : 100m
TX : -5 ~ +10dBm
RX : -118.5 ~ -91.5dBm
ANT
IC-112
TX : +29V
RX : +18V
TX
RF CON
TX/RX L BAND
CPU
REG
GPS
TX : +30V
RX : +18V
TX
:
+8 ~ 13dBm
RX
:
-120.5 ~ -94.5dBm
RX IF 50kHz
TX/RX L BAND
TX S-DATA
1575.42MHz
GPS TD/RD
+5/15V
HPA ON
ANT VOL/CUR
•
SYN UN-LOCK
•
AGC LVL
•
SYN DATA/CK/LE
•
HPA ON
•
REF CONT
•
TX ON
•
15.6MHz
•
+12V
•
TX ON
•
HPA ON
FAN
(on during TX)
CB1
+24V
DTE 1
DTE 2
PC / DATA
NMEA DMC 1 DMC 2 RCV BZ
IC-212
-148 ~ -136dBW/m
2
RX : 1530.0 ~ 1545.0MHz
TX RX
Loss : -3 ~ -13dB
TX : 28dB
RX : -2dB
-141.5 ~ -129.5dBm
+43dBm
+1.5dBi
RX GAIN
DANT=33 ~ 38dB
GPS) 29 ~ 38dB
Figure 3-2 Block Diagram of Antenna and Communication Units