Motorola EP450 Service Manual

11-44 UHF 465-495 MHz Schematic Diagrams, Overlays, and Parts Lists
November 24, 2003 HKLN4216A
PRE_GND
Reference Oscillator
NU
0.01uF
14R06
NU
R202
C206
D201
150k
4.5V
UNLOCK: 0V
3V
0V
3V
0V
TX: 3V
RX: 0V
C203
100
C202
3.2V to 4.5V
C201
Y201
2.7pF
45J68
LOCK: 3V
62pF NU
220pF
Crystal
NU
NU
NU
NU
NU
47k
TCXO
R206
Y202
UHF R3 Synthesizer
1SV232
C211
0.1uF
NC
1000pF
C231
NC
0.1uF
C216
FN_PRESC
22
R220
R246
100K
1000pF
C227
R245
1.5K
NC
R244
51
470pF
C208
R221
22
C204
470pF
C201
220pF
C207
0.1uF
C232
470pF
FN_16_8
C217
1000pF
0888600M25
C244
.01uF
FN_SYNTH_CS
0.1uF
C228
C205
NU
GND
2
GND1
4
OU T
3
IN
1
C202
NC
16.8MHz
14R06
Y201
VMULT4
VRO
13
25
WARP
23
XTAL1
24
XTAL2
62pF
1%
SFOUT
37
TEST1
38
TEST2
21
VBPASS
47
VCP
15
VMULT1
14
VMULT2
12
VMULT3
11
PREIN
33
34
PRE_VDD
35
PVREF
18
REFSEL
27
SFBASE
26
SFCAP
30
SFIN
28
4
10
MODIN
41
MODOUT
17
NC1
29
NC2
31
NC3
44
PD_GND
PD_VDD
5
32
CLK
7
D ATA
6
DGND
36
DVDD
19
FREFOUT
45
IADAPT
16
INDMULT
43
IOUT
LOCK
AUX2
2
AUX3
3
AUX4
20
AVDD
40
BIAS1
39
BIAS2
42
CCOMP
9
CEX
8
46
ADAPTSW
22
AGND
48
AUX1
1
1
63A 27
U201
FN_MOD
TP200
C223
.01uF
.01uF
TP240
1
C213
L211
390nH
NU
R212
0
R206
1
K1
2
K2
3
K3
6
A1
5
A2
4
A3
C221
D221
.01uF
2.2uF
C215
2.2uF
FN_V_SF
C218
C230
2.2uF
C240
NC
FN_VCO_MOD
1.3pF
7.7%
NC
NC
C203
3.7%
2.7pF
NC
C214
1000pF
FN_5V
FN_LOCK
NC
NC
FN_V_STEER
100
R205
.01uF
C222
FN_CLK
C224
.01uF
C233
0.1uF
C243
C245
4.7uF
NC
NC
NC
1uF
1
SH201
SHIELD
1
K1
1
K2
2
K3
3
SH200
SHIELD
6
A1
5
A2
4
A3
D220
FN_DATA
R227
39K
100pF
C241
R243
820
R230
20K
R247
18K
470pF
C219
C210
NC
NC
0.1uF
FN_3V
100
R223
NC
NC
150K
R202
OU T
3
VCC
4
VCON
1
C209
470pF
16.8MHz
45J68
Y202
NU
GND
2
10uF
C226
D201
C220
22pF
5V
C212
2.2uF
10uF
NC
5V
NC
C225
NU
FN_TRB
V_SF
V_STEER
5V
C206
LOCK
PRESC
16_8_MHZ
3V
SPI_DATA_OUT
MOD_IN
SYNTH_CS
SPI_CL K
VCO_MOD
TR B
Figure 11-33. UHF (465-495 MHz) PCB8486634Z02-O Synthesizer 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)