Simoco EMEA Ltd SDB670AC01 Manual De Usuario
SDB670 – SERVICE MANUAL
TNM-M-E-0032
May 13
Page 42
TECHNICAL DESCRIPTION
Figure 10. Tx and Rx Modules – VHF/UHF Block Diagram.
VCO BUFFER
CRYSTAL
FILTER
45MHz
FILTER
45MHz
RX-LNA
TUNED
FILTER
FILTER
30W PA
HARMONIC
FILTER
FILTER
DRIVER
BUFFER
BP FILTER
PLL
MIXER
TX/RX SW ITCH
FB BUFFER
IF AGC AMP
TRANSMITTER
RECEIVER SECTION
DUAL VCO'S & BUFFERS
SYNTHESISER
7dBm
AUDIO PROCESSING
AUDIO POW ER
AMPLIFIER
AMPLIFIER
DSP
SPI
FLASH
FLASH
PROCESSOR
RECEIVER FRONT END
TX VCO
ANTENNA SW ITCH
POW ER
CONTROL
COMPARATOR
CONTROL
COMPARATOR
VARACTOR
BIAS SUPPLY
BIAS SUPPLY
ADAPTIVE LOOP FILTER
A
N
A
L
O
G
O
U
T
P
U
T
S
14 CH D/A
CONVERTER
CONVERTER
A
N
A
L
O
G
I
N
P
U
T
S
D
IG
IT
A
L
O
U
T
P
U
T
S
D
IG
IT
A
L
I
N
P
U
T
S
ADC DRIVER
TX VCO
ALC
ALC
D/COUPLER
DETECTOR
CONTROLLER
FPGA
RAM
SECURITY
TUNED
FILTER
FILTER
DIFFERENTIAL
FILTER
FILTER
TEMPERATURE
CONTROL
CONTROL
CD-DIN
21.6MHz
REFERENCE VCTCXO
M1
CD-DOUT
CODEC
SYN-ALCSET
TEMP SENSOR
LM94022BIMG
LM94022BIMG
TX-MOD
CLIPPER
SYN-AFC
MIC-AUDIO
CLOCK SYNTHESIZER
ADC
PA-TXMON
PA-TEMPSENSE
VCO-BIAS
LOOP-VOLTS
C
D
-D
IN
C
D
-D
O
U
T
C
D
-M
C
L
K
C
D
-D
A
T
A
AlN-
AlN+
PLL-DATA
PA-ON2
SYN-AFC
SYN-ALCSET
SYN-VARSET
TUNE1
TUNE2
TUNE3
TUNE4
RX-AGC
PA-TXPW R
TUNE2
TUNE3
TUNE4
RX-AGC
PA-TXPW R
SYN-LOCK
IGN-SENSE
PW R-SENSE
SPKR-MUTE
SPKR-
SPKR+
TX-MOD
S
Y
N
-L
O
C
K
P
L
L
-D
A
T
A
SYN-VARSET
CPP-IN
F
IN
-R
F
VCO-RFOUT
VCO-BIAS
C
P
P
-O
U
T
5
V
-T
X
R
X
-L
O
T
U
N
E
_
1
T
U
N
E
_
2
T
U
N
E
_
4
T
U
N
E
_
3
P
A
-T
X
P
W
R
P
A
-O
N
1
P
A
-T
E
M
P
S
E
N
S
E
RX_IN
R
X
-A
G
C
ADC_CLOCK
RECEIVED DATA
CLOCK-DATA
DCLK
DCLK
SYN-REF2
57.6MHz
95.04MHz
2
1
.6
M
H
z
2
1
.6
M
H
z
2
1
.6
M
H
z
P
A
-O
N
2
LOW PASS
FILTER
FILTER
RX VCO
RX VCO
ALC
ALC
VCO-BIAS
SYN-ALCSET
V
C
O
-B
IA
S
V
A
R
-B
IA
S
CRYSTAL
FILTER
45MHz
FILTER
45MHz
RECEIVER IF
RECEIVER DEMODULATOR
PA-ON1
ANTENNA SOCKET
EXT-TX-AUDIO
EXT-RX-AUDIO
400 to 480MHz
355 to 435MHz
SPKR-MUTE
DIGITAL BUS
P
A
-T
X
M
O
N
L
O
O
P
-V
O
L
T
S
CURENT
LIMITER
LIMITER
P
A
-I
S
E
N
S
E
PA-ISENSE
3
9
5
t
o
4
7
5
M
H
z
3
5
5
t
o
4
8
0
M
H
z
355 to 480MHz
400 to 480MHz
400 to 480MHz
400 to 480MHz
45MHz
45MHz
45MHz
45MHz
355 to 480MHz