Receiver Circuit; Rx Fil Board - Furuno FS-1575 Service Manual

7.3 Receiver Circuit

7.3.1 RX FIL Board

05P0862A: FS-5075
05P0862B: FS-1575 and FS-257
The 05P0862B board is mounted on the FS-1575 and FS-2575 systems.
The 05P0862A board is mounted on the FS-5075 system and equipped with an interface
and connector used to mount the DUP FIL board (05P0863).
RX FIL
05P0862A: FS-5075
05P0862B: FS-1575, 2575
T/R ANT
J2
R. ANT
J1
E1
RX ANT
90B
J9
1 3.3V
3 DATA RX FIL
5
ST SR2 RX FIL
7 ST SR1 RX FIL
9
CLK RX FIL
11 DUP INST N
13 RX FIL HW VER0
RX FIL HW VER1
15
17 5V
0
19 15V
R1
2, 4, 6, 8,
GND
10, 12, 14,
16, 18, 20
SIMP DUP
CLK RX FIL
DATA RX FIL
ST SR2 RX FIL
ST SR1 RX FIL
CONFIDENTIAL (internal use only)
This confidential document is used only by FURUNO authorized persons.
It is strictly prohibited to reproduce the document in whole or in part without prior written permission of FURUNO.
5
CR4
15V
K1
30MHz
LPF
T2
0
R2
PRESEL 1-6
RX ANT
RX DIV
BPF1-5
U2 U4
Driver
Driver
U1
U3
Shift
Shift
Resistor
QH2
Resistor
SI
Fig. 7.3.1 RX FIL Board Block Diagram
7-37
RX DIV
T1
Q1 Divider
LPF-1 (BPF-1)
0.1 - 4,999MHz
BPF-3
5 - 8.999MHz
BPF-4
9 - 17.999MHz
BPF-5
18 - 29.999MHz
T3
PRESEL 1-6
(BPF-2)
DUP 4 - 26MHz
U6
Driver
U5
Shift
Resistor
Note)
Not mount on 05P0862B
7.3 Receiver Circuit
DIV OUT1
J5
DIV OUT2
J6
LPF OUT
J3
BPF IN
J4
BPF OUT
J7
DUP IN
J8
2, 4, 6,
8, 10, 12,
14, 16
DUP INST N
20
SIMP DUP
19
15V
18
J10