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Schematic Diagrams, Overlays, and Parts Lists
: UHF Band 1 Section
RX_INJ
TX_INJ
L281
390nH
C281
100pF
R245
240
L273
33nH
C272
NU
68nH
L271
0.1uF
C273
C276
if
ind
2.2uF
C286
0.1uF
VSF
SHIELD
SH242
1
SHIELD
SH241
1
VCO TOP SHIELD
VCO BOTTOM SHIELD
C271
PRESC
NU
Rx_sw
Tx_sw
10
13
12
8
7
VCC_LOGIC
18
SUPER_FLTR
3
TRB_IN
19
TX_BASE
16
TX_EMITTER
15
TX_IADJ
1
TX_OUT
TX_SWITCH
VCC_BUFFERS
14
GND_FLAG
9
17
GND_LOGIC
PRESC_OUT
RX_BASE
5
RX_EMITTER
6
RX_IADJ
2
RX_OUT
RX_SWITCH
U241
50U54
COLL_RFIN
4
FLIP_IN
20
GND_BUFFERS
11
R242
200
R243
10K
1
2
3
L243
RESONATOR
R244
12K
C244
2pF
C245
2.4pF
C285
100pF
100pF
C246
R241
18
1
2
Q241
BFQ67W
Rx_sw
L282
390nH
3
VSF
30
R248
7.5pF
C250
7.5pF
C242
7.5pF
C243
1
2
CR241
220nH
L242
CR243
390nH
L241
C241
100pF
CR242
VCTRL
A1
A2
C247
100pF
C248
0.1uF
10pF
C252
33nH
L251
CR251
C253
1.5pF
100pF
C251
7.5K
R253
7.5K
R254
Tx_sw
3.6pF
C254
C289
100pF
AUX4
330
R252
100pF
C255
L253
RESONATOR
18
R251
1
P1
P2
2
P3
3
3
Q261
2
4
1
47K
47K
4.7K
10K
R260
1K
DD
Q260
2
4
1
3
.01uF
C297
AUX3
5V
10K
47K
4.7K
47K
ZMY0130019-E
Figure 4-23:
UHF (403–470 MHz) Voltage Controlled Oscillator Schematic Diagram
Содержание PR860
Страница 1: ...PR860 Two Way Portable Radio Detailed Service Manual ...
Страница 2: ......
Страница 5: ...iv Notes ...
Страница 9: ...viii Table of Contents Notes ...
Страница 13: ...Notes xii List of Figures ...
Страница 17: ...1 4 Introduction Radio Model Information Notes ...
Страница 51: ...2 34 Theory of Operation Voltage Control Oscillators VCO Notes ...
Страница 81: ...4 4 Schematic Diagrams Overlays and Parts Lists Flex Layout Notes ...
Страница 193: ...4 116 Schematic Diagrams Overlays and Parts Lists Low Band Section Notes ...
Страница 196: ......