Lowband PCB 8485658Z03 / Schematics 4-3
2.0 Lowband PCB 8485658Z03 / Schematics
VIEWED FROM SIDE 1
J403
VR450
J400
21
22
40
TP402
R435
C443
TP410
R421
TP405
1
1
20
TP401
C404
L401
C472
C492
L400
C444
C497
C496
C495
C494
C493
C490
VR434
E409
8
7
VR447
C473
C471
R477
C491
C441
SH400
C426
C427
VR449
TP406
U407
8
RT400
R450
3
4
CR413
C423
U405
1
Q411
4
3
C425
C428
Q417
45
1
E407
E408
SH401
21
22
C482
R499
3
4
C438
R407
CR412
R410
R437
R429
TP415
R418
Q405
R476
R427
32
1
R478
R492
C480
R416
R405
R428
R408
Q403
R481
C467
4
U400
58
R401
R402
U406
C429
C401
C424
R447
R446
C402
C406
Q400
17
16
C403
C400
R448
R436
R406
CR440
R403
C440
C432
SH200
C249
C201
1
6
R286
D210
SH203
L201
L203
Y201
C247
C284
CR201
B503
TP201
C286
C283
TR201
3
4
C285
R230
C237
CR211
CR202
C202
R285
D211
C203
C218
C206
Q204
L226
R289
C220
C219
Q288
R229
R288
C263
Q202
R287
C233
C223
C224
L202
R203
C287
R227
R237
C229
B504
U204
C234
L210
R233
Q201
C260
R235
C228
C232
C235
TP500
R510
C302
L110
L302
9
16
SH303
2
C301
U101
FL301
1
SH502
R112
L301
8
1
Q100
2
3
1
43
6
6
R106
5
T502
C130
R105
R301
C348
4
C136
3
C148
L508
C516
R104
C122C123
L107
D501
C121
C120
SH302
R302
R312
C305
R509
R507
L106
PB504
C303
L303
R303
U301
L304
R304
R508
R305
C310
6
T501
L105
3
SH100
C304
C306
4
L102
VR502
SH301
CR301
L306
C144
C119
C118
C115
C114
C111
C311
L104
C145
L308
C312
SH501
C522
C314
R315
L504
D100
L101
C110
C309
R314
C313
L507
C537
R310
Q301
R317
C515
C536
C106
C103
C308
R316
C315
C316
C535
L103
C107
PB501PB502PB503
C534
C147
D101
C317
L503
L100
C500
C512
VR500
VR102
C511
C502
VR501
Q510
C513
C514
CR502
R502
R501
C149
PB505
54
1
C505
R514
3
CR503
T100
2
R515
4
2
3
FL0830829-O
Lowband (30-50 MHz) Main Board Top Side
4-4 Lowband PCB 8485658Z03 / Schematics
VIEWED FROM SIDE 2
J102
S502
SH300
R121
D102
R123
R124
C332
C337
C336
C343
C339
SH500
R122
D103
R116
C333
C335
C538
R117
VR101
C334
C340
C341
C506
R504
L501
C146
R101
C138
C137
C141
C140
C142
M101 M202
2
S501
4
4
5
8
C
2
D104
1
1
2
3
C
4
4
J101
3
M300 M301 M400
C281
VR201
U205
R232
L204
CR204
C231
C205
C258
25
13
L208L209
U200
R219
C215
1
4
C280
C298
CR203
U203
C242
C236
L225
C299
C214
L207
8
5
25
C342
R512
R114
1
37
R503
9
C331
Q509
C504
C533
U102
U303
C321
L200
R224
C297
VR202
R223
R222
R225
C256
R238
R234
R204
C204
C257
C255
L212
L215
L211
CR200
R228
U207
VR200
VR203
C503
F1
37
1
C225
C216
R231
Q203
R206
C226
C230
R318
C319
C330
C328
C324
C325
C507
C327
L502
L307
C326
C323
L305
C127
R102
R309
U302
C126
C307
R120
R103
R306
C125
R308
R111
R110
R307
C134
R119
R118
M100
13
1
C320
R505
R513
D502
25
17
C143
R108
C129
1
J1
2
3
L108
C132
R109
R107
C128
L109
C135
C108
TP200
C133
TP100
C131
C139
R113
C124
E100
SH201
R239
C259 C261
SH202
C222
R115
R236
C221
C227
SH402
C437
R460
R419
R449
C408
C409
C410
R434
3
FL401
C435
SH403
C479
R445
C407
R475
C436
R463
R415
C433
C431
CR411
Q416
U410
37
C405
C412
R426
R413
C481
R425
1
C411
R420
R414
R462
C434
C419
U404
C414
51
76
R461
C420
C415
R400
C421
25
13
C430
C422
C416
C451
U409
C453
C448
C447
C452
M401
20
1
C450
3
4
Q410
R432
R424
R472
R423
R439
U420
R438
C439
C475
C476
R471
R411
R409
L411
C456
R431
11
10
26
R457
1
E404
E406
C459
L410
VR445
VR446
E405
E403
E402
E401
C463
C466
C458
E400
R473
C442
VR448
C445
C449
VR432
VR433
Lowband (30-50 MHz) Main Board Bottom Side
FL0830830-O
Lowband PCB 8485658Z03 / Schematics 4-5
BATT_CODE
BATT_B+_2
BATT_B+_4
UNSWB+_2
MECH_SWB+
VOL
VDD
R5
RX_IN
RX_INJ
LVZIF_SEL
CLK
DATA
16.8MHz
RSSI
DEMOD
IF303
IF300
IF301
IF325
IF324
IF302
IF304
IF305
IF306
IF307
IF308
IF309
IF310
IF311
IF312
IF314
VR501
6.8V
C502
0.47uF
C505
100pF
SWB+
SB1
PTT
IF317
IF318
IF319
IF320
IF315
IF316
IF321
IF322
IF323
C500
.01uF
C511
C512
100pF
VR500
6.8V
VR502
6.8V
M301
M300
C513
100pF
100pF
PB501
SWITCH
12
PB504
SWITCH
12
C514
100pF
PC0
PC1
PC2
S501
1
SWITCH
2
4
C0
C0
C1
C1
GND GND1
7
9
CR502-2
2
R501
680
13
24
PC3
4
3
1
6
8
CR502-1
CR503
IMX1
R502
180
R515
10K
5
Q510
R514
47K
RTA3
RTA0
RTA1
RTA2
2
DATA
1
J1
NEG
3
POS
S502
5
4
2
3
TAB2
TAB1
LOW
1
7
6
RX_IN
RX_INJ
R5
RX FRONT END
GREEN_LED
R5
Vdd
IF
IF
RED_LED
RX BACK END
CE
CLK
DATA
16.8MHz
RSSI
DEMOD
FL0830470O
FL0830470-O
Lowband (30-50 MHz) Receiver Overall Schematic
4-6 Lowband PCB 8485658Z03 / Schematics
R5
C516
C507
0.1uF
R505
560
L508
68nH
R507
270
R508
18
30pF
R509
270
IF
-26.5 dBm
RX_IN
L501
150nH
C538
82pF
C533
39pF
L502
270nH
T501
C535
2pF
C534
L503
1uH
SH501
SHIELD
LP FILTER
C536
27pF
RECEIVE -47dBm SIGNAL AT 35.04MHz WITH 1K TONE.
RF MEASUREMENTS MADE WITH BOONTON 92 MILLIVOLTMETER.
R504
12K
C506
100pF
R503
R512
4.7K
1K
C504
2
K
D502
51pF
-24.5 dBm
0.78 Vdc
Q509
HP415
3.24 Vdc
33 mV
R513
10
8.2pF
C537
3.9pF
L504
560nH
SH502
SHIELD
MIXER
C515
56pF
L507
150nH
SH500
SHIELD
PREAMP
3.25 Vdc
-24.5 dBm
C522
.01uF
RX_INJ
XFMR
6
4
1
2
3
TP500
-18.75 dBm
R510
3.6K
T502
XFMR
12
6
34
D501
2
3
4
FL0830471O
FL0830471-O
1
Lowband (30-50 MHz) Receiver Front End
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