Figure 4-59: Vhf (136-174 Mhz) Synthesizer Schematic Diagram - Motorola PR860 Detailed Service Manual

4-78
5V_1_FN
5V
(SOURCE)
VCTRL_1_FN
VCTRL
Q3721
UMC5N
R5_1_FN R5_2_FN
4
R5
T5_1_FN
T5
VCO_MOD_1_FN
VCO_MOD
SH3701 SH3702
SHIELD SHIELD SHIELD
1
Figure 4-59: VHF (136–174 MHz) Synthesizer Schematic Diagram
5V_2_FN
3
K3
2 K2
C3701
.01uF 1
K1
C3702
.01uF
C3703
.01uF
3
K3
2
C3704
K2
.01uF 1
K1
C3705 C3706 C3714
4.7uF
0.1uF 4.7uF
R3721
470
5V R3722 C3722
0.1uF
1K
C3721
3
0.1uF
2
1
R3723
100
1
TP3701
C3724
1uF
SHIELD
1
C3711
C3715
10uF
470pF
L3701
390nH
4
A3
A2 5
A1 6
R3701
D3701
100
C3710
2.2uF
4
BIAS_ADJ
A3
5
A2
6
A1
BIAS_ADJ_1_FN
R3702 R3705
D3702
33K
0
NU
R3726 C3725
C3708
47K 0.1uF
0.1uF
NU NU
C3707
C3709
22pF
0.1uF
R3703
R3704
150
150
C3746
220pF
WARP
25
INDMULT
16
SFOUT
28
LOCK_1_FN ADAPTSW
46
LOCK
LOCK
4
IADAPT
45
IOUT
43
TEST2
38
TEST1
37
TRB_1_FN AUX4
3
TRB AUX3
2
AUX2
1
AUX1
48
VMULT4
11
VMULT3
12
VMULT2
14
VMULT1
15
100
R3741
16_8MHz_1_FN MODOUT
41
16.8MHz FREFOUT
19
XTAL2
24
XTAL1
23
56pF
C3741
NU
C3761
56pF
C3735
.01uF
NU
R3762 C3762
2.2K 330pF R3763
NU 100
NU
Schematic Diagrams, Overlays, and Parts Lists: VHF Band Section
U3711
mgc_comps
2
SWB_PLUS_1_FN
NR
4 5
OUT IN SWB+
6 3
ERR SD
C3713
C3712
2.2uF
0.1uF
1
TP3702
NC3
31
NC2
29
NC1
17
8.2pF
R3727
C3726
CCOMP 100K
42
REFSEL
18
PRESC_1_FN
PREIN
2.2uF
32
SFBASE
C3755 C3727
27
SFCAP 100pF
26
BIAS2
39
BIAS1
40 R3752
R3751
330K
200K
VBPASS
21
C3752
mgc_comps C3753
PVREF
35 1000pF
4.7uF
U3701 DATA_1_FN
SFIN DATA
30
DATA MODIN_1_FN
7
MODIN MODIN
10
CSX_1_FN
CSX
CEX
9
CLK
CLK
8
CLK_1_FN
C3744 C3742 C3745 C3743
220pF 220pF
220pF 220pF
R3761
16.8MHz
47K
6 3
IN OUT
R3760 C3763 C3731
C3732
0 0
1.6pF .01uF .01uF
NU
D3761
OSC_16.8MHZ
16.8MHz
NU
2 4
GND VCC 5V
C3751
0.1uF
NU
PRESC
VSF_1_FN
VSF
C3754
0.1uF
Vdda_1_FN
Vdda
L3731
2.2uH
C3733
C3734
2.2uF .01uF
ZMY0130483-A