Motorola CP040 - Page 273

UHF1 PCB 8416205H02-C/-D Schematic Diagrams 3-25
UHF1 (403-440 MHz) Voltage Controlled Oscillator Schematic PCB No. 8416205H02-C/-D
3.5 V to 10 V
4.5 V
RX: 0 V
TX: 3 V
0.98 V (Rx)
4.97 V (Rx)
293 mV RF (Rx)
+8 dBm
1.64 V (Rx)
66.3 mV RF (Rx)
-6.7 dBm
276 mV RF (Rx)
+11.7 dBm
220nH
L265
R264
220nH
L270
100
3.0%
3.3pF
L264
2%
12.5nH
C283
C265
390pF
33
R274
1SV229
D262
CIGOL_CCV
81
C253
1.6%
6.2pF
SUPER_FLTR
3
19
TRB_IN
TX_BASE
16
TX_EMITTER
15
TX_IADJ
1
TX_OUT
10
TX_SWITCH
13
SREFFUB_CCV
41
GALF_DNG
9 71
CIGOL_DNG
PRESC_OUT
12
RX_BASE
5
RX_EMITTER
6
RX_IADJ
2
RX_OUT
8
RX_SWITCH
7
50U54
U251
COLL_RFIN
4
FLIP_IN
20
SREFFUB_DNG
11
C264
5%
2pF
$V
NU
2%
5.1pF
L283
330
R273
$V
C254
1
3
2
12pF
1%
BFS540
Q280
1
VCO_TRB
$V
C257
SH251
SHIELD
C270
VCO_V_STEER
0.1uF
390pF
C292
C285
VCO_TX_INJ
390pF
L254
2%
12.5nH
C286
6.2pF
390pF
C275
NC
V_SF
220nH
L255
220nH
R261
22K
6.8pF
L251
C290
C271
VCO_5R
390pF
$V
C273
.01uF
5.6K
R272
C255
0.1%
5.6pF
33
R263
C274
0.1uF
C268
0.5pF
$V
0.1%
2.4pF
C266
V_SF
33
R253
R280
4.7K
C256
2.5%
3.9pF
NU
C252
L281
27nH
R282
910
NC
L252
27nH
R262
6.8K
R283
150
390pF
C284
D261
7.5pF
1.3%
C267
C263
2.1%
4.7pF
R284
220
R275
100
$V
0
R277
R285
0
$V
1K
R276
D251
8.2K
R271
R281
5.1K
C281
390pF
L291
6.8nH
VCO_PRESC
100
R254
15nH
L292
C276
6.8pF
$V
L282
15nH
3.3pF
C282
VCO_MOD
VCO_VSF
18pF
C291
L271
0.1uF
NU
L276
C272
SH253
SHIELD
1
27nH
1
VCO_3V
SH250
SHIELD
27nH
$V
150pF
C251
220nH
L262
VCO_RX_INJ
L272
TX_INJ
V_SF
5R
VCO_MOD
PRESC
V_STEER
RX_INJ
V_SF
3V
TRB