330-400Mhz Receiver Front End Schematic Diagram - Motorola GP328 Plus Service Manual

5D-22
R301
R302
100K
100K
C303
C301
8.2pF 5.1pF
RX_IN
CR301
CR302
C302
L301
12pF L302
19.71nH
19.71nH
SH301 SH302
SHIELD SHIELD
1 1
RXFE Top Shield RXFE Bottom Shield
SH304
SHIELD
1
RX Mixer Diode Shield

330-400MHz Receiver Front End Schematic Diagram

R305
470
R304
12K
L304
180nH
C309
C308
100pF
100pF 2.285V
-51.5dBm@330.225MHz
-52.0dBm@399.725MHz
R303
1 K
C310
C305 C307
Q301 0.1uF
3
12pF 0.1uF
1
3
CR303 2
R328
2.7
R340
C304 L303
2 1
8.2K
11pF 33nH
R5
L340
390nH
SH303
SHIELD
C395
100pF
1
Mixer Shield
Note:
Rx1 = -50dBm@330.225MHz rf signal
Rx2 = -50dBm@399.725MHz rf signal
probed using high impedence probe
DACRx
R5
R342
100K
C315
C314
100pF
0.1uF
C380
.01uF
C321
100pF
C306
NU
R306
C312
100K
C316
L305
8.2pF
5.1 pF
22nH
CR304
-49.5dBm@330.225MHz
-47.0dBm@399.725MHz
L306
C311 C313
12pF 19.71nH
NU
CR308
HSMP3820
R347
R317
1
1K
1K
3
2
C331
100pF
4.396V
C396
R336
NU
NU
R5
R316
91K
C333
NU
Q315
3
1
0.508V
2 R318
18K
1
R319
150
R327
33K
3
2
1
2
Q316
NU
R326
NU
-52.5dBm@330.225MHz
-53.5dBm@399.725MHz T301
XFMR
6
R307
100K
C318
R329
8.2 pF
0
4
CR305
L307
C317 C381
19.71nH
NU
12pF
-23.5dBm@285.125MHz
-28.5dBm@354.625MHz
TP302
R5
R339
0
R332
NU
C386
100pF
C370
100pF 1
RX_INJ
R300
2.2K
RSSI
R330 C371
NU NU
C397
1uF
1.797V@-50dBm
RT300
33.0K
R335
R338
NU
NU
R5
2 1
VR300
NU
RT301
R325
C391 NU
6.8K
NU
R334
NU
Circuit Board/Schematic Diagrams and Parts List
C322
82pF
-59.5dBm@45.1MHz
L310
150nH
R310
R308
270
270
R309
18
IF
CR306
4 3
1
2
3 2 1
T302
XFMR
R348 L309
3.6K 16.28nH
C375
C320 C319
100pF
7.5pF 1.8pF
VCOBUF
L321 R333
C374
NU NU
100pF
R349
0
3 C373
C378
Q310
NU
NU
NU
2
C372
R331
NU
NU
ZMY0130352-O