Motorola GP Series Detailed Service Manual page 475

800MHz PCB 8480641Z02, 8480641Z03, 8480641Z09, 8480641Z10 / Schematics
R350
Vdda
20
C350
10µF
RSSI
R5
IF
16.8MHz
L350
2.2µH
AGC Processing
U350
5
VCC
R351 R352
2 4
12K
120
1
NC
R353
1.53V Note 2 R354 C355
12K
0.3V Note 3 NU 0.1µF
109.65MHz Crystal Filter
L353 L354
1 4
IN OUT
FL350
120nH
470nH
L355 C376
R359
C378
C377
220nH 1.5K
2pF
22pF 2.4pF
Second LO
C388
13pF
L356
L357
33nH
2.2µH
CR350
DATA
CLK
LVZIF_SEL
2.5V Note 2
3V Note 3
FE_AGC
R355
4700pF
10K
IF Amplifier
C361
C362
4700pF
R356
L352
390nH
1.5K
3V Note 3 C365
8pF
5V
R358
47K
U352
C369
C371
4700pF
4700pF
1.4V
2.4V
R360
47K
Note 3
C393
R366
Note 3
1.5K 0.1µF
C382
10µF
2.84V
R361
200
C385
R362
10K
C386 9.1pF
Q350
C387
15pF
13pF
1.75V
C389
2.45V
13pF
Second LO Loop Filter
R363
47K
R364
C390
2K
13pF
C352
.022µF
C353
0.22µF
C354
L351
.022µF
390nH
C356
100pF
C358
0.1µF
C359
0.22µF
-30.8 dBm @ 109.65MHz
36
C4M
1 35
RED_VCC C3M
2 34
RED_VSS C2M
3 33
Note 1, Note 2
PRE_IN C1M
4 32
RSSI_OUT
VAG
5 31
U351
RSSI_FLT
LIM
6 30
ROSE_VCC
EXTBS
7 29
ROSE_VSS
AFC
8 28
DEMOD_HF
TESTD
9 27
DEMOD_OUT
VPP
10 26
PHASE_LOCK
GOLD_VCC
11 25
EMIT VAG_REF
C370 12
C367
BASE
0.1µF
.022µF
C380
0.1µF
C381
0.1µF
C383
.022µF
-19.5 dBm @219.3MHz Note 1
Notes:
1. Measured using high impedance probe.
2. Measured with -50dBm 861.85MHz RX signal at the antenna input.
3. Measured with no RX signal at the antenna input.
.5V to 2.7V
R365 C391
.01µF
3.6K
C392
1µF
800MHz (806 - 870 MHz) Receiver Front End
3-13
C357
C360
1µF
0.22µF
C363
1µF
C364
1µF
C366
1µF
DEMOD
C373
C372 C374
0.22µF 10µF .022µF
C379
1500pF
SH350 SH351 SH352 SH353
1 1 1
1
LVZIF
Second LO IF Amp IF Filter