Motorola Professional GP340 - 300 R1 (300-350 MHz) Receiver Front End

4-6 PCB 8485726Z01 - Schematics
L340
390nH
HSMP3820
1
2
3
CR308
R317
1K
330pF
C395
C331
330pF
1K
R347
R5
C311
100K
R307R306
100K
CR304
C306
CR305
C312
9.1pF
22nH
L305
C313
13pF
L306
22.54nH22.54nH
L307
4.7pF
C316
NU
9.1pF
R305
470
R304
12K
C321
330pF
C309
330pF
R303
1 K
Q301
1
3
2
C307
0.1uF
0.1uF
C314
180nH
L304
C315
330pF
C310
0.1uF
R328
2.7
L303
33nH
R340
8.2K
22.54nH
L302
C308
330pF
100K
R301
13pF
C302
C305
9.1pF
CR301
CR302
4.7pF
C303
13pF
C304
R302
L301
100K
22.54nH
1
CR303
2
3
C301
9.1pF
RX_IN
1
SH304
SHIELD
1
SHIELD
SH302
1
SHIELD
SH301 SH303
SHIELD
1
RXFE Top Shield RXFE Bottom Shield Mixer Shield
RX Mixer Diode Shield
.01uF
C380
100K
R342
R5
DACRx
NU
C381
R329
0
C318
13pF
C317
9.1pF
T301
4
6
3
1
2
XFMR
TP302
T302
XFMR
4 6
3 1 2
C320 C319
5.6pF 9.1pF
16.28nH
L309R348
3.6K
R336
C333
R5
NU
NU
33K
R327
R316
91K
Q315
1
3
2
18K
R318
R319
150
C396
NU
R300
2.2K
1uF
C397
1
33.0K
RT300
2
R334
Q316
1
3
2
VR300
R326
NU
NU
NU
NU
R325
6.8K
R338
R335
RT301
21
C391
NU
NU
NU
NU
R5
C370
330pF
R330
RSSI
RX_INJ
NU
R331
C372
Q310
1
3
2
C371
330pF
C386
NU
NU
NU
8.2pF
0
R349
330pF
C374
C378
C373
NU
NU
C375
VCOBUF
330pF
R332
L321
0
R339
R5
NU
NU
R333
NU
R309
18
82pF
C322
L310
150nH
270
R308
7.5pF
C398
2
34
1
CR306
IF
-51.5dBm@300.01MHz
-52.0dBm@349.99MHz
-52.5dBm@300.01MHz
-53.5dBm@349.99MHz
-59.5dBm@45.1MHz
-23.5dBm@254.91MHz
-28.5dBm@304.89MHz
1.797V@-50dBm
0.508V
4.396V
2.285V
-49.5dBm@300.01MHz
-47.0dBm@349.99MHz
Note:
Rx1 = -50dBm@300.01MHz rf signal
Rx2 = -50dBm@349.99MHz rf signal
probed using high impedence probe
300R1 (300-350MHz) Receiver Front End
ZMY0130402-O