Furuno FAR-2827 Service Manual

7.3 Processor Unit: RPU-013
7-35
2. IF-VIDEO MIX signal input
IF-VIDEO MIX signals in which video signals and 60 MHz IF signals from the TR unit
are superimposed and separated at HPF (30 MHz)/LPF (30 MHz), and outputted as
external monitor signals of Slave-Display-1 and Slave Display-2.
Slave-Display-1 is set as Full-Log signal and Slave Display-2 as Semi-Log signal but
the jumper setting of JP3 to JP6 can change the setting. Video signals are converted into
A/D (8bit) at U46 in the next stage and inputted to the U46, SPU FPGA.
Fig. 7.3.7 Input of IF-VIDEO MIX signal to the SPU board
The level of video signal from external radar can be adjusted by R401 so that the video
signal level of TP58 becomes 2.0 Vp-p.
See page.4-74 to 4-82 for information on connection of video signals to and from
external devices.
RF unit
IF + Video MIX
U46 SPU FPGA
RF Tx/Rx
BP
HD
TRIG
U30
U41
U40
OP HD OUT-1
HD IN
TRIG IN
BP IN
OP VIDEO OUT-1 (FULL LOG)
OP VIDEO OUT-2 (SEMI LOG)
SEMI LOG VIDEO
OP HD OUT-2
OP BP OUT-1
OP BP OUT-2
OP TRIG OUT-1
OP TRIG OUT-2
FULL LOG OUT
Log AMP
(Video sig.)
IF AMP
(Liner: 60MHz)
IF AMP
(60MHz)
IF input
IF AMP p.c.b
LPF
(L/C)
HPF
(L/C)
Long Puls FIL
(BW: 2.5MHz)
MIdle Puls FIL
(BW: 10MHz)
Short Puls FIL
(BW: 35MHz)
DET
(U86)
U85
U78
U78
U87
JP3
JP4
JP5
JP6
BW A/B sel
TEST ECHO
SEL
(U83)
A/D
(U76)
U85
OP VIDEO IN
OP VIDEO IN
R401
SEL VIDEO
8bit
ARPA/MAIN CPU
Echo data
RPU-013
RFC p.c.b
SPU p.c.b
J616
Master Radar
J617, J618
SUB Display-1, 2
J617, J618
SUB Display-1, 2
MIX
AD/DATA
TP58
GAIN/STC CONT

Furuno FAR-2827 Specifications

General

Brand	Furuno
Model	FAR-2827
Category	Marine Radar
Language	English