Figure 9-102.Uhf (450-527 Mhz) Receiver Back End Schematic Diagram - Motorola HT Series Detailed Service Manual

UHF Band 2 Circuit Board/Schematic Diagrams and Parts List (PCB 8485641Z02)
SH323 SH321
SHIELD SHIELD
CRYSTAL FILTER SHIELD LVZIF TOP SHEILD
FL301
XTAL
TBD
C323 L311
150pF 750nH
6 3
OUT
IN
IF
C324
20pF
L331 R343
2.2uH
Vdd_FILTERED
C382
(SOURCE)
10uF
C344
0.1uF
C329
0.1uF
SH322
SHIELD
C342
1uF
C341
1uF
LVZIF BTM SHEILD C340
1uF
C339
1uF
C356
Vdd_FILTERED .022uF
C337
L314
100pF
2.2uH
C336
0.1uF
R5
C355
R314
0.15uF
3K
C326 C328
R313
.01uF 0.1uF
330
C327
100pF
R311
30K
C330
10pF
C325
R312
R351
Q302
.01uF 2.4K
0
R352
R315 L330
3.3K
12K
680nH
10
Vdda
C348
C347
C346
0.1uF 0.1uF
0.1uF
C343
0.22uF
R344
12K
C357
0.22uF
C358
1200pF
C4M
37 C359
C4P
24 0.1uF
38
C3P MLPD_CR
C334
39 23
C2P BRP_OFF
.022uF
40 22
C1P BROWN_VCC
41 21
GREEN_VCC FREF
42 20
MIX_BYP GND
43 19
CEX LVZIF_SEL
GREEN_VSS
44 U301 18
BLUE_VSS CLK CLK
45 17
BLUE_VCC DATA
46 16
MIX_IN TESTA
47 15
PREAMP_OUT IOUT
48 14
GOLD_VSS
13
COL
C338
15pF
RSSI
C361
.01uF
C360
.022uF
DEMOD
R350
C345
100K
0.1uF
C390
100pF
R355
0
C383
100pF 3
Vdd C352
FILTERED 12pF
2
C349
C351
.022uF
20pF
16.8MHz
C350
R324
330pF
2K
DATA
C362 R321
0.1uF 1K
C363
1uF
Figure 9-102. UHF (450-527 MHz) Receiver Back End Schematic Diagram
9-179
C384
R345
Q320
56pF
10K
1
C353
R346
43pF
56K
C385
L332
C354 100nH
56pF
47pF
L325
2.2uH
R320
CR310
3.9K
C364
R322
8200pF
200K
FL0830743O