User Manual Part 3

8-10
PLL
VCO1
PLL
TX_MOD1
SPI_MOSI
TX_MOD2
SPI_CLK
RX_PLL_LOCK
PLL1_CS
16.8MHz
LOCK_ENA
T/nR
RX_LO
TX_LO
nT/R
nT/R
+5.5V
+5VA
+5VA
+3.3V
+5.5V
+5VA
+3.3V
+5VA
+3.3V
+3.3VXR
FB6
FB
12
C195
.1uF
C12
.018uf
+
C174
4.7uf
C95
3300pf
R53
100
R77 330
R63
NP
U6
RF2361
1
3
4
5
2
RFIN
VDP
RFOUT
2G
1G
+
C175
4.7uF L
+
C2
4.7uF
R65
NP
L44
82nH
C15
47pf
R12
1K
C23
220pf
C5
.0047uf
L40
100nH
C159
1000pF
+
C203
4.7uf
FB5
FB
12
C17
1000pf
U29
CX72301
1
2
3
4
5
6
7
8
9
10
11
12
13
14 15
16
17
18
19
20
21
22
23
24
25
62
27
28
92
CLK
MOD_IN
MUXOUT
VSUBD
GNDcm
mcCCV
FVCO
nFVCO
LD/PS
VCCcp
CPOUT
GNDcp
XTALG
XTALIN XTALO
VCCx
GNDx
LD/PSa
VCCca
CPout
GNDcp
nFVCOa
FVCOa
VCCcm
GNDd
dCCV
DATA
nCS
G
C181
100pf
R73
330
C16
.015uf
C28
.15uf
R5
620
C60
18pf
R17
200
TP21
+
C196
1uF
C166
100pf
R71
100
+
C154
10uf
U23
LT1761ES5-5
15
42
3
IN OUT
BYPGND
nSHTDN
C14
1000pf
U7
AS169-73
1
2
3
6
5
4
J3
GND
J2
V2
J1
V1
C24
220pf
C96
.1uf
R60
0
R78 330
C192
.1uF
C189
.01uF
C22
.68uf
C41
470pf
C90
470pf
FB7
FB
12
TP16
C153
10pf
C193
100pf
R30
240K
C164
.1uF
R31
160
C160
4700pf
+ C161
1uf
C61
1000pf
C62
1000pf
R64
0
C68
12pf
U34
ILC7081AIM550x
15
42
3
IN OUT
BYPGND
nSHTDN
C97
.1uf
R61
100K
C276
3300pf
+
C202
4.7uf
E5
SHIELD-PLL
1
GND
C167
1000pf
R29
1K
+
C171
4.7uf
R10
240
R8
620
R9
2K
TP13
TestPoint
Y1
VTX822015C-16.8-5.0
4
3
1
2 5
ccV
Out
Vtune
d
nG
G
U17
ADG749
4
6
1
2
3
5
S1
S2
IN
VG
D
C182
.1uF
R59
1K
U1
VCO-D16
1
2
3
4
RF_o
V
IN
G
R74
330
C194
100pf
C157
1000pF
C165
3300pf
NOTE: Individual replacement parts are not available for the
RF board, so the entire board must be replaced if it is defective.
VHF RF BOARD SCHEMATIC (PAGE 3 OF 6)