Motorola PRO3150 Manual De Servicio página 178

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4-126
R301
R302
100K
100K
C301
C303
13pF
4.3pF
RX_IN
CR301
CR302
L301
L302
C302
12pF
11.03nH
11.03nH
SH301
SH302
SHIELD
SHIELD
1
1
RXFE Bottom Shield
RXFE Top Shield
SH304
SHIELD
1
RX Mixer Diode Shield
Figura 4-73. Diagrama esquemático de la etapa de entrada del receptor de rango 2 de UHF (450-527 MHz) (tarjeta de circuito impreso nº 8485755Z01)
R305
470
R304
12K
L304
180nH
C309
C308
100pF
100pF
C310
0.1uF
-51.4dBm@450.125MHz
-51.2dBm@526.925MHz
R303
4.3K
C305
C307
Q301
3
8.2pF
0.1uF
1
3
CR303
2
R328
2.7
L303
R340
C304
2
1
22nH
8.2K
11pF
R5
L340
390nH
SH303
SHIELD
C395
100pF
1
Mixer Shield
DACRx
R5
R342
100K
C314
C315
0.1uF
100pF
C380
.01uF
C321
C306
100pF
2pF
R306
100K
C312
C316
L305
4.3pF
4.3pF
12nH
CR304
-51dBm@450.125MHz
-51.2dBm@526.925MHz
C311
C313
L306
NU
11pF
11.03nH
CR308
HSMP3820
R347
R317
1
1K
1K
3
2
C331
100pF
4.398V
C396
R336
NU
NU
R5
R316
91K
C333
Q315
NU
3
1
0.508V
2
R318
18K
1
R319
150
R327
33K
3
2
1
2
Q316
NU
R326
NU
-51.7dBm@450.125MHz
-52.6dBm@526.925MHz
T301
XFMR
6
R307
100K
C318
R329
7.5pF
0
4
CR305
L307
C317
C381
11.03nH
11pF
4.7pF
-24dBm@405.025MHz
-24.9dBm@481.825MHz
TP302
R5
R339
0
R332
NU
C386
100pF
C370
100pF
1
RX_INJ
R300
2.2K
RSSI
R330
C371
C397
NU
NU
1uF
1.850V@-50dBm
RT300
33.0K
R335
R338
NU
NU
R5
2
1
VR300
NU
RT301
R325
C391
NU
6.8K
NU
R334
NU
C322
82pF
-63.8dBm@45.1MHz
L310
150nH
R308
R310
47
270
R309
0
IF
CR306
4
3
1
2
2
1
3
1
2
3
T302
XFMR
6
4
R348
L309
3.6K
16.28nH
C320
C375
C319
7.5pF
3.6pF
100pF
L321
R333
C374
VCOBUF
NU
NU
100pF
R349
0
3
C373
C378
NU
NU
Q310
NU
2
C372
R331
NU
NU
ZMY0130410-O

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