Icom AH-3 Manuale utente
CS1
CS2
CS3
EN
COMMAND
CLR
Vdd
RESET
IC4, IC5, IC6
IC1
IC13
IC20
IC19
Q1
Q3, Q4
IC7, Q2
IC10, IC11, IC12
L1, D1-D4, IC14 R6 - R14
IC15, IC17, IC 18, Q11, Q12
D8 - D11, Q9, Q11, IC15
BUFFER
LATCHES
RELAY DRIVERS
PWR
PWR
|z|
PHASE
SWR1
SWR2
SWR3
CP11
BUFFER
CONTROL
CPU
VOLTAGE
REGULATORS
+ 8 V
+ 13.8 V
KEY
START
RL2
RF IN
TUNE
DETECTOR
SWR
ATTENUATOR
PHASE
IMPEDANCE
FWD POWER
BUFFER
DETECTOR
DETECTOR
CP12
CP13
CP14
CP15
CP17
J6
J5
Q7Q6Q5
DATA
ANTENNA
L6, D12, D13, , IC 16, IC17
IC8
AH-3 BLOCK DIAGRAM
NORMAL
+ 5 V
RL1
TUNE
GATE
CPU
C NETWORK
L NETWORK
TUNE
RL1
TUNE
220 pF
220 pF
100 pF
120 pF
82 pF
82 pF
82 pF
82 pF
82 pF
82 pF
DSA301L
fwd pwr det
AND RELAY CONFIGURATION
AH-3 RF PATH
RL2
3T
NORMAL
..... attn... SWR det ......
RF IN
NOTE: RL12 and RL20 are always in opposite states
ABSORBER
4T 6T 5T 7T 10T 18T 31T 30T 58T
1nF 1nF 1nF 470 pF 220 pF
R170
R169
47K C165
L18
C154
L6
C155
L14L12 L13L11L10L9L8
RL20
L7
ANTENNA
C153C152C151 C157
C156
C159
C158
C162
C160
C161
RL13
RL15
RL14
RL19
RL18
RL16
RL17
RL12
C167
C166
RL21RL10 RL11RL9RL8RL6 RL7RL5RL4RL3
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