T-Cpu; Signal Route - Furuno FS-1575 Service Manual

7.6.1 Signal Route

The following diagram shows the channels of 36-kHz IF signal to the IF TX, RX, WR1,
and WR2 boards.
CONT DAT A/B
FS-2575C
IF TX
TX
IF WR2
WR2
FIL WR2
AGC WR2
AGC WR1
WR1
FIL WR1
IF WR1
36kHz IF RX
RX
AGC RX
RX ATT
Fig. 7.6.2 Overview of 36-kHz IF Signal Channels
From FPGA
Test Tone
MIC 1 Voice Signal
MIC 2 Voice Signal
LINE IN Voice
Signal Select
DSC Digital Signal
NBDP Digital Siganl
TX Monitor
CW key
EM Mode
Fig. 7.6.3 Overview of Transmission Processing Circuit within DSP Transmitter
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.
MOT
CONT TD/RD
U29
I/F
CDC SDTI
U4 CDC SDTO
CODEC
U1 ADCSIO CMD
CPLD
U14
SELSIO DIN
DAC
U10 ADC SDTO
ADC
DACSIO DOUT
Test Tone
LPF
GAIN
BPF
MIC
Compression
FSK
Modulation
CW
Modulation
7-57

T-CPU

DATA
U18 U11 U29
FPGA DSP MAIN CPU
DSP
Voice
Modulation
GAIN
7.6 T-CPU
To FPGA
IF TX