Motorola MOTOTRBO XPR 7550e - Figure 8-21. Receiver Schematic Diagram

Circuit Board/Schematic Diagrams and Parts List for 800/900 MHz 8-23
C0421
R0433
DIG_RX_EN
IN
R0455
Q0425
RX_VRF1_2.775V
4
1
52
3
6
G2
S2
D2
D1
S1
G1
C0420
R0434
SLNA4
DNP
DNP
C0438
R0443
Q0421
C0436
C0437
R0439
C0422
R0420
R0422
RX_Q0421_FEEDBACK_R0422
RX_LNA_Q0424_FEEDBACK_R0439
4 1
3 6
52
B1
C1
E1
C2
B2
E2
DNP
C0429
C0427
L0420
R0421
C0428
C0430
LNAO
DNP
DNP
L0426
L0425
R0438
C0464
Q0424
C0431
Q0423
C0432
L0422
C0433
D0420
PREFILTER_LNA
23
1
23
1
21
2
3
1
DNP
DNP
R0440
R0441
C0467
R0432
R0431
L0424
R0430
C0435C0434
C0463
C0462
C0455
DIG_VCO_800_EN1
DIG_VCO_900_EN1
U0451
4
6
5
3
1
2
G1
V2
GND
V1
CTGND
RFC
J2
J1
DNP
DNP
C0453
C0454
C0457
C0456
DNP
FL0450
C0459
6
9
4
1
10
5
3
2
8
7
OUT1
GND6 GND4 GND3 GND2
GND1
IN2
IN1
GND5
OUT2
DNP
DNP
DNP
R0451
R0452
R0450
C0451
C0458
C0452
U0450
C0450
DIG_VCO_800_EN1
LNA_POSTFILTER
DIG_VCO_900_EN1
4
6
5
3
1
2
G1
V2
GND
V1
CTGND
RFC
J2
J1
POST-FILTER
LNA
L0423
R0429
C0449
R0425
C0425
C0423
L0421
R0426
C0426
C0424
R0424
M1BC
M2C
TL_TXRX_IN_900_SHIELD
TL_TXRX_IN_800_SHIELD
IN
IN
DNP
DNP
DNP
DNP
D0403
D0404
C0407C0406
10
5
3
2
8
7
DNP
DNP
DNP
D0401
D0402
C0405
C0401
C0402
PRE-FILTER
DNP
C0439
L0428
FL0400
C0409
U0400
C0411
C0403
C0408
C0410
C0404
DIG_VCO_800_EN1
DIG_VCO_900_EN1
6
9
4
1
4
6
5
3
1
2
G1
OUT1
GND6
GND4
GND3
GND2
GND1
IN2
IN1
GND5
OUT2
V2
GND
V1
CTGND
RFC
J2
J1
SH0401
2
1
E0496
DC_LIN_VRF1_2.775V
DIG_VCO1_800B2_EN
IN
IN
C0460
R0454
R0453
C0496
C0497
DIG_VCO_800_EN1
RX_VRF1_2.775V
DIG_VCO_800_EN1
OUT
C0461
DIG_VCO_900_EN1
DIG_VCO_900_EN1
OUT
DIG_VCO2_900_EN
IN
DIG_RX_RF_STEP
RX_VRF1_2.775V
IN
C0487
R0487
E0480
Q0480
RX_STEP_ATTEN_Q0480_E0481
3
1
4
5
2
E2
B1
E1
C2
C1
E0481
R0485 R0486
C0486
C0485
T0490
C0490
C0491
E0491
E0490
RXFE_ATTEN_OUT
TL_RXROD_800_IN_SHIELD
TL_RXROD_800_INX_SHIELD
4
1
3
2
OUT
OUT
S2
S1
P2
P1
STEP ATTENUATOR
R0483R0482
R0481
C0484
C0483
C0482
C0481
R0484
R0480
U0481
U0480
POSTFILTER_STEPATTEN
6
4
1
3
5
2
1
3
5
J3
J2
GND
V1
V2
J1
J3
J2
GND
V1
V2
J1
RX_STEP_ATTEN_4-6
RX_STEP_ATTEN_6-4
6
4
2
BALUN
Figure 8-21. Receiver Schematic Diagram