Uhf Band 2 Voltage Controlled Oscillator Schematic Diagram - Motorola GP328 Plus Service Manual

Circuit Board/Schematic Diagrams and Parts List
C281
R245
100pF
240
C276
2.2uF
L281 L273
390nH 18nH
C272
1.1pF
L271
27nH
RX_INJ
TX_INJ
SH241 SH242
SHIELD SHIELD
1 1
VCO TOP SHIELD VCO BOTTOM SHIELD
Q260
3
5V
47K
2
AUX 3
C297
.01uF
1
VSF
C286
4.6V
0.1uF
C273
0.1uF
18 14
10
TX_OUT TX_IADJ
8
RX_OUT RX_IADJ
SUPER_FLTR
12
PRESC PRESC_OUT COLL_RFIN
C271
U241 RX_BASE
1pF
7
Rx_sw 50U54
RX_SWITCH RX_EMITTER
13
Tx_sw
TX_SWITCH TX_BASE
TX_EMITTER
FLIP_IN
TRB_IN
17 11 9
Q261
4
10K
47K
4.7K
R260 47K
1K
4
10K
4.7K
47K
R242
120
C285
100pF
C246
100pF
R244
15K
1
2
3
2 Q241
4
BFQ67W
5
1
6
16 2V
3
L282
15
390nH
20
19
R253
7.5K
Tx_sw
4.6V
R254
8.2K
C289
C254
100pF
3.3pF
3
C255
100pF L253
2
RESONATOR
AUX 4
R252 R251
1
270 33
C250
L243 4.3pF
RESONATOR
3
R241
18
C242
4.3pF
2
C243
1 4.3pF
C245
2.7pF
R243 C244
10K 3.6pF
Rx_sw
VSF
R248
30
C247 C248
0.1uF
100pF
C252
L251
20pF
390nH
CR251
C253
1
1.5pF
2
3

UHF Band 2 Voltage Controlled Oscillator Schematic Diagram

5C-25
L242
22nH
CR243 CR242
3.5V@450MHz
9.5V@527MHz
L241
390nH
VCTRL
C241
100pF
CR241
A1 A2
1 2
C251
100pF