Uhf 438-470 Mhz Schematic Diagrams, Overlays, And Parts Lists; Figure 11-18. Uhf (438-470 Mhz) Pcb 8486348Z13-C Receiver Front End Schematic Diagram - Motorola EP450 Service Manual

11-24
Chapter 11 UHF 438-470 MHz Schematic Diagrams, Overlays, and Parts Lists
C2
9.1pF
IF1
RX_IN
1.1%
C1
L1
9.85nH
9.1pF
2%
1.1%

Figure 11-18. UHF (438-470 MHz) PCB 8486348Z13-C Receiver Front End Schematic Diagram

November 24, 2003
UHF R2 Front End
C523
0.45pF
C3 C6
C5 C8
6.7%
6.2pF 7.5pF 8pF 5.1pF
1.6% 1.3% 1.25% 2%
C4 C12 C7
L2 L3
9.85nH 9.85nH
16pF NU 16pF
2% 2%
1% 1%
C28 C29 C31 C32 C34
12pF 6.8pF 7pF 6.8pF 6.8pF
1% 1.5% 1.5% 1.5%
1.43%
C27 C30 C46 C33
L31 L32
9.85nH
9.85nH
7.5pF 16pF NU 20pF
2% 2%
1% 1%
1.3%
RX_INJ
FE_5R
5R
R20
R21
5.6K
82
1 4
Q22
2 5
UMT1
C20
6 3
390pF
C99
R22
R23
5.6K
27K
0.1uF
C23
R24
1.5K
390pF
C9
3
8.2pF
C11 C21
0.79V 1
CR1 15pF 390pF
3 1.2%
Q21
2
C10
L21 R25
BFS505
22nH 5.6K
8pF
1.25%
2
1
C524
0.5pF
C35 C37
C38
7.5pF 7.5pF 8.2pF
C48
0
1.3% 1.3% 1.2%
C47 C36 C39 C49
L34
9.85nH
L33 18pF 7pF NU
2%
9.85nH
1% 1.43%
2%
FE_RF_IN J C42 C44
L40 L41
27nH 27nH
16pF
8.2pF
C43
C41 C45
7.5pF 20pF 16pF

UHF 438-470 MHz Schematic Diagrams, Overlays, and Parts Lists

C26
390pF
SH1 SH40
SHIELD SHIELD
1 1
C25
390pF
L55
22nH
C521
4.2V
5.1pF
L52
C522
680nH
0.5pF
R51
51
C51
L51
150nH
82pF
T41
RF BALUN
4 3
2
C14
1.5pF
6 1
5 6.7%
NC NC
CR41
HSMS2829
1
IO1
3 4
IO3 IO4
T42
4 IF BALUN 3
IO2
2
2
1
6
5
NC
NC
R40
1K
1
TP1
TP2
1
FE_IF_OUT
IF_OUT
C13
1.5pF
6.7%
HKLN4216A