Figure 8-31. Nue7369A Frequency Generation Unit (Vco) Circuit – 2 Of 2 - Motorola APX 5000 Service Manual

8-50
TP853
TEST_POINT
DC_LIN_1_5V
IN
IN
DC_SUPER_FILTER_5V
IN
DC_LIN_5V
DIG_CTRL_TR
IN
DIG_CTRL_G
IN
DIG_CTRL_F
IN
R764
1.2K
ANA_CHARGE_PUMP
IN
C762 C766 C769
.039UF 6800PF .016UF
R759
680
R767
68
ANA_ADAPT_CHARGE_PUMP
IN
C760 C763 C765 C768 C770
.082UF .082UF .082UF .082UF .082UF
C783
1500PF
C759 R761
.22UF 220
R762
11K
RF_HP_MOD_OUT
IN
DIG_CTRL_VTUR1
IN
DIG_CTRL_UR2
IN
DIG_CTRL_UT1
IN
DIG_CTRL_UT2
IN
DIG_CTRL_C
IN
DIG_CTRL_B
IN
Figure 8-31. NUE7369A Frequency Generation Unit (VCO) Circuit – 2 of 2
ANA_VTUNE
C703
100PF
DNP
DC_LIN_1_5V
L806
390NH
DC_SUPER_FILTER_5V
C791
0.1UF
C794
100PF
7 1
VTUNE POUT
DIG_CTRL_VTUR1 4
3 SEL1 NC
NC
5
Y704
DIG_CTRL_UR2
V0225AZ
U709
309MHZ/379MHZ
SKY13251
3
4
RF1 V1
5 6
RF2 V2
8 7
RF3 V3
1
NC RFC
CGND
DC_SUPER_FILTER_5V
C792
0.1UF
C795
100PF
7 1
VTUNE POUT
DIG_CTRL_UT1
3 4
SEL1
NC NC
5
Y705
DIG_CTRL_UT2
V0225AZ
415MHZ/485MHZ
U710
SKY13251
3 4
V1 RF1
6 V2 5
RF2
7 8
V3 RF3 NC
1
RFC
CGND
NC
R811
C802 39
.22UF
C814 C816 L817 R819
R809
1000PF 100PF 390NH 270
5.6K
R807
22K
Q712
2 5 C820 C709
Q712 R813 R705
BC858CD 680 220PF 10 220PF
BC858CD
R808
C701 R812 R708
C813
82K Q713
220PF 82 100
1PF
NE662M04
C810 R815
220PF R818
24
4
8.2
3
C704
62PF
DC_LIN_1_5V
L701
R773
390NH
5.6K
C775 C777
C771
R772
1000PF 33PF
100PF
33 Q774
2
NE68519
R776 C779
39 100PF
R778
180
Schematics, Boards Overlays, and Parts Lists: Transceiver (RF) Boards: UHF1
C831 R713
100PF 10
Q714
R712 R714
NTZD3154N
560 560
1 6
2 5
NC
3 4
NC NC
DC_LIN_1_5V
L821
390NH R832
15
C806
.22UF
C838 C844 L846 R849
R827
390NH 560
1000PF 47PF
6.2K
R822
20K
Q703
Q703 C851
2 5
BC858CD
BC858CD 220PF
C702
R823
R833
220PF
56K
100
Q842
C830
R840
NE662M04
220PF 15
4
3
TP780
TEST_POINT
TL_RX_LO
OUT
R848 C836
R716
15 47PF TL_TX_LO
10
OUT
R701 R715 R717
100 560 560
RF_PRESCALAR
OUT