Dup Fil Board (05P0836): Fs-5075 - Furuno FS-1575 Service Manual

7.3.2 DUP FIL Board (05P0836): FS-5075

The DUP FIL board is an option board for the FS-5075 system and mounted on the RX
FIL board (05P0862A).
The DUP FIL board is used as Band-pass filters (BPF) to reduce the RF transmission
signale for Full Duplex communication.
When the system is set to Simplex mode, the DUP FIL board will be passed through.
The DUP FIL board is configured by coupling the three stages of resonator with a
capacitor.
The Duplex communication mode will be enabled when
• the FS-5075 system is used;
• the DUP FIL board is mounted; and
• the R. ANT is installed and selected as a receiving antenna by selecting
[MENU] -> 9.SERVICE -> 3.RT SETUP -> 1.SETUP -> RX ANT -> CONNECT
or
[MENU] -> 5.SYSTEM -> 7.RX SETUP -> 2.ANT SELECT -> R.ANT
Reference)
To share the WR2 ANT with the R. ANT, select [MENU] -> 9.SERVICE -> 3.RT
SETUP -> 1.SETUP -> DIVIDER -> "ON," connect the WR2 ANT to "DIV OUT2"
and "DUP IN" of the DUP FIL board to "DIV OUT 1."
T/R ANT
ATU
R. ANT
R. ANT
WR1 ANT
WR1 ANT
WR2 ANT
WR2 ANT
Fig. 7.3.4 Example of Installation Pattern for Duplex Specification
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.
TX FIL
(05P0870A)
T/R ANT
TX IN
K17
TX FIL
(LPF x 8)
J1
RX RF
K19
J3
BK ON
DIV OUT1
Q1
J5
DIV
DIV OUT2
AMP
DIVIDER
SW
J6
T/R ANT
K1
CR2
LPF OUT
30M LPF
J2
J3
R. ANT BPF IN
RX BPF,
RX ANT
PRE SEL
J4
J1
(x 5)
BPF OUT
J7
DUP IN
RX FIL
(05P0862A/B)
J8
FS-5075T
7-42
7.3 Receiver Circuit
DUP FIL
For FS-5075
(05P0863)
SIMP_DUP
DUP IN
DUP FIL
( x 8)
J1 K1
SIMP OUT
J4-19
J2
(DUP INST)
DUP OUT
J3
ANT RX
RX
(05P0842)
J2
ANT WR1
WR1
(05P0847A)
J2
ANT WR2
WR2
(05P0847B)
J2