Figure 9-9. Uhf Frequency Generation Unit (Synthesizer) Circuit – 1 Of 3 - Motorola ASTRO XTSTM 4000 Detailed Service Manual

9-10
VSF_VCO
L209
680nH
2416307H01
VSF
V3A V5A
V5A
V3A
CLK
CSX
DATA
V3A
R1
SCEN
Q200
R2
4813973A42
R218
10K
V3A V3A
U203
AD5320BRT
8
CLK
5 7
SSCK SCLK SHDN
6
SSFS SYNC
1 2
VOUT IN
4
SSTD DIN
1
COM
6
OS
C221
0.10uF
PRESC
Figure 9-9. UHF Frequency Generation Unit (Synthesizer) Circuit – 1 of 3
May 28, 2008
V3A
L203
2.2uH
C210
0.10uF
V5A
C250
0.10uF
F4
CLK_CLK
G1
EN_CEX
H1
MODIN
F1
DATA
E10
SFIN
VSF
R205
B10
56K NC PVREF
G6
NC VBYPASS
D7
R204
C215
CPB1
62K
A7
0.10uF
CPB2
H10
SFCAP
G10
NC SFBASE
D10
PREIN
C220
R216 10uF
G5
8.2K NC REFSEL
5 D6
OUT NC CCOMP
G4
NC NC1
C337 F10
NC NC2
220pF
F7
NC NC3
FL200
MAX7414
V3A
L208
2.2uH
R215
10K
1
VCONT
Y200
C235 1XTV168000VAA
100pF 16.8MHz
V3A
L204
2.2uH
VCP
C207 C206 C200
10uF 100pF
C211 0.10uF
0.10uF
V5A
K9
XTAL1
K10
XTAL2 NC
K6
R221
FREFOUT NC
A6
6.8K
MODOUT
K4
VMULT1
K3
VMULT2 NC
K1
VMULT3
J1
VMULT4
U202
35U92
R220
A1
AUX1 NC 8.2K
B1
AUX2
C1
AUX3
D1
AUX4 NC
A9
TEST1 NC AUX2
A8
TEST2 NC
A5
IOUT
A4
IADAPT
E1
LOCK
A3
ADAPTSW NC
G7
SFOUT
K5
INDMULT NC
VSF
J10
WARP
C230 C231
C232
100pF .01uF
10uF
V5A
L202
2.2uH
C233
R201
0.10uF
33K
4
3 3
OUTPUT
C234 C236
5
NC1 .01uF 1000pF
6
R208
NC2
7
33K
NC3
8
NC4
Schematics, Board Overlays, and Parts Lists – UHF: Transceiver (RF) Section
K3 A3
1 6
C208 K2 A2
2 5
0.10uF
K1 A1
3 4
D202
C205
0.10uF
C202
0.10uF
K3 A3
1 6
K2 A2
2 5
K1 A1
3 4
C201
D201
0.10uF
L201
2.2uH
C204 C203
0.10uF 2.2uF
R210
332
C222 R217 C217 C218 C219
4700pF 332 .047uF .033uF 2000pF
R212
182
2
L207
1uH
C224 C225 C226 C227 C242
1
0.1uF 0.1uF 0.1uF 0.1uF 0.1uF
R213
10K
C209
0.10uF
C229
100pF
R202
2K
5
1
L205
R207
2
U201 C213 1uH
100
LMH6723 1000pF
C214
100pF
V3A
AUX3
VCTRL
R267
1K
1
TP201
TEST_POINT
C241
0.1uF
LOCK
F168
6871620L01-C