Motorola PRO3150 Manual De Servicio página 79

C308
100pF
-59.4dBm@403.355MHz
-59.4dBm@469.985MHz
R301
R302
100K
100K
C301 C303 C305
6.8pF 3.9pF 20pF
RX_IN
CR301 CR302
L301 L302
C302
C304
10pF 13.9nH 13.9nH
13pF
SH301 SH302
SHIELD SHIELD
1 1
RXFE Bottom Shield
RXFE Top Shield
SH304
SHIELD
1
RX Mixer Diode Shield
R305 C314
510 0.1uF
R304
12K
L304
C321
180nH
100pF
C309 -54.4dBm@403.355MHz
100pF
-51.8dBm@469.985MHz
C310
0.1uF
R303
4.3K
C307
Q301
3
0.1uF
1
3
CR303 2
R328
0
L303 R340
2 1
22nH 6.8K
R5
R347
L340
1K
390nH
SH303
SHIELD C395
100pF
1
Mixer Shield
R5
Figura 4-22b. Diagrama esquemático de la etapa de entrada del receptor de rango 1 de UHF (403-470 MHz) (tarjeta de circuito impreso nº 8480672Z01)
DACRx
R5
R342
100K
C315
100pF
C380
.01uF
-63.4dBm@403.355MHz
C306 -60.5dBm@469.985MHz
NU
R306 R307
100K
100K
C312
C316
L305
13pF
3.9pF
27nH
CR304 CR305
C311 C313 L306 L307
NU 10pF 13.9nH 13.9nH
CR308
HSMP3820
R317
1
1K
3
2
C331
100pF
4.386V
C396
R336
NU
NU
R300
R316
2.2K
91K
C333
Q315
NU 3
1
C397
0.503V
0.47uF
2 R318
18K
3.85V
1
R319
150 RT300
R327
33.0K
33K
3
2
1
2
Q316
NU VR300
NU
R325
R326 R334
NU NU
C322
82pF
L310
150nH
T301
XFMR
6 1
2
C318
R329
7.5pF
0
4 3
C317 C381
9.1pF 7.5pF
-34dBm@358.256MHz
R348
-36.7dBm@424.885MHz
3.6K
TP302
R5
L321
NU
R339
0
R332
NU
C386
100pF
3
C370
100pF 1 Q310
NU
RX_INJ
2
RSSI
R330 C371 R331
NU NU
NU
1.831V@-50dBm
R335
R338 NU
NU
R5
2 1
RT301
C391 NU
6.8K
NU
4-27
-65.5dBm@45.1MHz
R308
R310
47
270
R309
0
IF
CR306
4 3
2 1
1 2 3
T302
XFMR
6 4
L309
16.28nH
C320 C375
C319
7.5pF 1.8pF 100pF
R333
C374
VCOBUF
NU
100pF
R349
0
C373
C378
NU
NU
C372
NU
ZMY0130315-D