Motorola EP450 Service Manual

11-42 UHF 465-495 MHz Schematic Diagrams, Overlays, and Parts Lists
November 24, 2003 HKLN4216A
Chapter 11 UHF 465-495 MHz Schematic Diagrams, Overlays, and Parts Lists
0.79V
4.2V
UHF R3 Front End
C32
1.6%
6.2pF
10pF
1.0%
10pF
C41
SH40
SHIELD
1
C28
1.0%
C42
1.2%
8.2pF
C37
1.2%
8.2pF
9.85nH
2%
L1
C49
NU
L40
27nH
R21
91
4
NU
C46
CR41
HSMS2829
IO1
1
2
IO2
IO3
3
IO4
390pF
C2
5
C12
NU
C51
C31
1.8%
5.6pF
82pF
9.85nH
2%
L32
0.5pF
6%
C524
R23
27K
C523
6%
0.5pF
C38
2%
5.1pF
C5
1.25%
8pF
C26
390pF
2.7pF
3.7%
C10
R24
1.2K
C39
3.7%
2.7pF
0.1uF
C99
R20
5.6K
9.1pF
1.1%
C44
C36
1%
18pF
C20
390pF
C34
1.6%
6.2pF
C522
0.5pF
68pF
1%
C21
R51
L51
150nH
51
1.6%
6.2pF
27nH
C9
L41
R22
5.6K
63
14
4.3pF
2.3%
C3
UMT1
Q22
25
1.6%
6.2pF
IF1
C11
390pF
C29
C4
1.0%
10pF
9.85nH
2%
L34
C8
2.3%
4.3pF
L31
2%
9.85nH
9.85nH
2%
L3
1.5pF
6.7%
C13
680nH
L52
BFS505
Q21
1
3
0
C48
FE_IF_OUT
C35
1.6%
6.2pF
C43
1%
20pF
1
TP1
1
T41
RF BALUN
5
NC
4
6
3
2
C47
1
NU
SH1
SHIELD
1
TP2
2
22nH
L55
CR1
1
3
C30
1%
16pF
8pF
1.25%
C1
8.2pF
1.2%
C27
24pF
1%
C33
C23
390pF
C14
6.7%
1.5pF
7.5pF
1.3%
C6
9.1pF
1.1%
C2
FE_RF_IN J
2.7pF
3.7%
C521
4
6
3
2
1
R25
5.6K
IF BALUN
T42
5
NC
L2
2%
9.85nH
33nH
NC
1K
R40
L21
1%
15pF
L33
2%
9.85nH
C45
C7
1.1%
9.1pF
NC
FE_5R
RX_IN
IF_OUT
RX_IN J
5R
Figure 11-31. UHF (465-495 MHz) PCB8486634Z02-O Receiver Front End Schematic Diagram

Motorola EP450 Specifications

General

Channel Capacity	16 channels
Operating Temperature	-30°C to +60°C
IP Rating	IP54
Frequency Range	VHF: 136-174 MHz, UHF: 403-470 MHz
Weight	Approximately 350g (with standard battery)