User Manual Part 3

8-12
TO PG 1
FROM LO BUFFER
0603
W=30, L=40
1008
W=40, L=60
0603
136-174 MHz
0603
W=7, S=8,
N=2.7
W=30, L=30
FROM PG4
W=7, S=8,
N=1.5
LNA
W=30, L=30
1008 10081008
136-174 MHz
FDG6303ALT
0603 0603
W=7, S=8,
N=1.5
W=7, S=8,
N=2.7
W=7, S=8,
N=2.7
W=7, S=8,
N=2.7
0603
IF
nTX_NAP
nATTEN
RX_IN
ATTEN
nATTEN
RX_LO
+3.3VXR
R20
0
C242
3300pf
C315
NP
L36
22nH
U39 MGA-71543
32
1
4
IN OUT
G G
U48
NP
1
2
34
5
6
S1
G1
D2 S2
G2
D1
C234
39pf L
R25
NP
C65
3300pf
MX1
ADEX-10L
32
64
1
5
RF IF
OLG
G G
C64
3300pf
R106 0
C231
6.2pf L
C316
7.5pf
C235
39pf L
R21
NP
R125
NP
R75
0
R84
0
L19
18nH
C206
3300pf
L53
150nH
C239
6.2pf L
R98
1K
R19
NP
R79
0
L54
150nH
R107 0
TP3
C241
3300pf
C317
7.5pf
C56
3300pf
C63
3300pf
C70
3300pf
R24
NP
R72
62
C314
NP
L51
150nH
C233
6.2pf L
L33
15nH
C277
39pf L
R18
NP
TP6
R130
10nH
C36
NP
R27
NP
R126
NP
U44
AT-267
1 2 34
5
1FR
DNG
2FR1V
2V
C205
100pf
R16
NP
C318
43pf
L82
72nH
C232
1000pf
C236
82pf L
C69
.01uf
R28
NP
D4
SI2323
1
23
C67
3300pf
R26
0
TP4
C55
100pf
R124
NP
R22
0
C238
6.2pf L
C237
82pf L
L50
150nH
L9
NP
C229
1000pf
C230
39pf L
L32
22nH
L83
72nH
C26
NP
N
OTE: Individual replacement parts are not available for the
R
F board, so the entire board must be replaced if it is defective.
VHF RF BOARD SCHEMATIC (PAGE 5 OF 6)