Rx back end (overtone) – Motorola CP150TM User Manual
Page 237
UHF (465-495 MHz) Schematic Diagrams, Overlays, and Parts Lists (8486634Z02-O)
12-55
6880309N62-C
June, 2005
5V for 25kHz
RX Back End (Overtone)
0V for 12.5kHz
3.39V
3.05V
0.74V
1.5V
2.1V When -47 dBm @ antenna
9.1pF
1.1%
C53
1
2
3
5V
1
2
3
D51
1
3
2
D52
CR51
C71
IF_DEMOD
TC7W04F
1
7
0.1uF
GND1
3
4
GND2
IN
1
OUT 2
U52-1
C69
CFWC455E
FL53
12K
0.1uF
C73
R52
1 IN
2
OUT
4700pF
FL54
CFWC455G
GND1
3
GND2
4
0.1uF
C55
5V
0.1uF
C56
C62
0.1uF
C60
0.1uF
C67
0.1uF
R53
33K
2.4K
Q70
MMBT3904
1
3
2
R60
C80
22pF
1%
C59
2.7pF
R73
1.8K
NC
R74
1.2K
6
2
1.6K
U52-2
TC7W04F
5.1K
R80
R91
PBR941
Q51
1
3
2
C93
3.6pF
C90
0.1uF
NU
C63
L53
120pF
0.1uF
R82
1.2uH
2%
L54
NU
1uH
L81
5V
C52
22pF
4.7K
R57
C66
SH52
SHIELD
1
OU T
I N
1
0.1uF
44.395MHz
TSS2_44_395MHZ
Y51
2
GND
4
GND1
3
2 CC1
5 CC2
1
GND1
4
GND2
3 IN
6
OUT
44.85MHz
MXF45
FL51
4
VCC
8
C58
3.9pF
PWR_GND
U52-4
GND
R81
10uF
C91
0.1uF
C65
1K
R75
12K
20K
C57
0.1uF
9180468V04
3
GN
D
IN
1
OU T
2
R64
FLTR
FL52
C81
1%
33pF
C70
IF_IN
RFIN
RFIN_DEC
2
5
RSSIOU
T
RSSI_FEED
9
6
VCC
130pF
LIMI
N
LIMOU
T
11
13
LIM_DEC1
12
LIM_DEC2
20
MIXOUT
OSCI
N
4
3
OSCOUT
10
Q
U
ADI
N
1
A
UDIOOU
T
8
7
A
UDIO_FEED
15
GND
18
IF
AMPI
N
16
IF
AMPOUT
IF
AMP_DEC1
19
17
IF
AMP_DEC2
14
SA616
U51
680
R78
R77
1%
8.2K
R67
5V
IF_BAND_SEL
20K
R76
1%
12K
0.1uF
36pF
1%
C82
5.1K
C68
R54
R66
20K
R63
C72
0.1uF
455KHz
3
2
1
39K
45B02
Y70
5V
IF_RSSI
SH50
SHIELD
1
R55
330
C64
0.1uF
390
R72
39K
R65
3.3K
R61
100K
R62
TC7W04F
U52-3
3
5
IF_5V
C92
0.1uF
51
R90
BW_SE L
5V
IF_IN
RSSI
DEMOD
47pF
C61
47pF
C74
Figure 12-41. UHF (465-495 MHz) Receiver Back End Schematic Diagram (8486634Z02-O)