Motorola PRO3150 Manual De Servicio página 78

4-26
R301
R302
100K
100K
C301 C303
6.8pF 3.9pF
RX_IN
CR301 CR302
L301 L302
C302
10pF 13.9nH 13.9nH
SH301 SH302
SHIELD SHIELD
1 1
RXFE Bottom Shield
RXFE Top Shield
SH304
SHIELD
1
RX Mixer Diode Shield
Figura 4-22a. Diagrama esquemático de la etapa de entrada del receptor de rango 1 de UHF (403-470 MHz) (tarjeta de circuito impreso nº 8480672Z01)
R305
510
R304
12K
L304
180nH
C309
C308 100pF
100pF
C310
0.1uF
-59.4dBm@403.355MHz
-59.4dBm@469.985MHz
R303
4.3K
C305 C307
Q301
3
20pF 0.1uF
1
3
CR303 2
R328
0
L303 R340
C304
2 1
22nH 6.8K
13pF
R5
L340
390nH
SH303
SHIELD C395
100pF
1
Mixer Shield
DACRx
R5
R342
100K
C314 C315
0.1uF 100pF
C380
.01uF
C321
C306
100pF
NU
-54.4dBm@403.355MHz
-51.8dBm@469.985MHz R306
100K
C312
C316
L305
13pF
3.9pF
27nH
CR304
C311 C313 L306
NU 10pF 13.9nH
CR308
HSMP3820
R347
R317
1
1K
1K
3
2
C331
100pF
4.386V
C396
R336
NU
NU
R5
R316
91K
C333
Q315
NU 3
1
0.503V
2 R318
18K
3.85V
1
R319
150
R327
33K
3
2
1
2
Q316
NU
R326
NU
-63.4dBm@403.355MHz
-60.5dBm@469.985MHz
T301
XFMR
6
R307
100K
C318
R329
7.5pF
0
4
CR305
L307
C317 C381
13.9nH
9.1pF 7.5pF
-34dBm@358.256MHz
-36.7dBm@424.885MHz
TP302
R5
R339
0
R332
NU
C386
100pF
C370
100pF 1
RX_INJ
R300
2.2K
RSSI
R330 C371
C397 NU
NU
1uF
1.831V@-50dBm
RT300
33.0K
R335
R338 NU
NU
R5
2 1
VR300
NU
RT301
R325 C391 NU
6.8K
NU
R334
NU
C322
82pF
-65.5dBm@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 1.8pF 100pF
L321 R333
C374
VCOBUF
NU NU
100pF
R349
0
3 C373
C378
NU
NU
Q310
NU
2
C372
R331
NU
NU
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