Table of Contents
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RX
+12V
R202
R203
200
200
L201
L202
L203
RF AMP
C205
6.8pF
R201
C201
C202
2.7k
A201
5.6pF
4.3pF
L221
L226
Q201
RF IN
3636
C371
R204
1.3pF
270
R321
J202
510
WO202
TO OCXO
OCXO INPUT
R239
C305
.01
WO 14
8
R
C241
C368
.1
27pF
9
27
+6V
V
OSC IN
Q203
C243
WO 15
3658
U205
.1
C370
MC145151DW2
R316
R320
10
27pF
C226
FV
10k
J201
10k
.01
C244
WO16
.1
HS CS RX 16
R234
R210
R246
1k
3.6k
1k
28
4
HS LK RX 19
LOCK DET
PD OUT
C324
+ C246
R245
+6V
100pF
1
3.9k
3
Vcc
+ C245
21
T/R
33
17
N6
16
C306
N5
18pF
1
15
N4
F IN
C242
C304
.01
2
GND
27pF
C248
.001
+6V
R271
910
14
V DD
C256
C330
U209
C328
C307
.1
27pF
MC145190
820pF
100pF
20
R232
REF IN
10k
19
Q210
RF DATA 20
DATA
3658
R231
10k
18
C252
RF CLK 18
CLK
+6V
.001
C265
C206
Q211
27pF
27pF
3658
8
R272
RX
240
12
C333
R276
Vcc
27pF
47k
+6V
7
C257
C331
GND
.1
27pF
R319
R269
10k
1k
17
SYN CS RX 12
ENABLE
R270
C309
1pF
1k
2
11
SYN LK RX 14
LOCK DET
F IN
C325
100pF
10
13
17
F IN
TEST 2
C332
C302
15
C259
27pF
27pF
27pF
11
+12V
C309
R299
2
3pF
TP2
R267
294
5
6
V PD
PD OUT
C255
+ C308
R268
C358
.1
4.7
1k
3.9pF
VCO
753-772 MHz
CNTL
6
TAP
8
A006
MOD
7
GND
5
GND
2
GND
1
RF OUT
4
+12V
3
C269
27pF
10-11
+ C336
C311
C337
.001
4.7
56pF
+ C203
C204
4.7
33pF
L204
L205
L206
MIXER
C208
C209
33pF
8.2pF
L227
L228
4
U201
5
RF
IF
LRMS-2H
C372
C267
2
GND A
1.3pF
39pF
C207
3
GND B
3pF
6
L207
GND C
LO
1
+6V
+6V
51
R224
C314
100
.01
C313
R219
R220
100
.01
100
R225
C228
C230
.01
100
.01
WO 32
R217
C225
R222
TO TX
C24
C227
3.3k
.01
3.3k
OCXO
.01
.01
Q204
C369
3658
27pF
W201
R218
R223
2.7k
2.7k
C229
R221
R226
180
270
.01
U211
TP1
LMC7101
3
+
1
C247
4
56pF
+6V
R241
10
R281
L 217
C244
R242
1k
10uH
.01
+12V
+12V
2.7k
Q206
R315
R229
3658
270
C249
R243
.01
+ C266
C316
3.3k
C250
4.7
.01
R227
L214
100pF
Q207
10k
.1uH
3658
3
C231
DC IN
100pF
R240
R244
5
Q205
2
MOD
Y201
RF OUT
270
3.3k
3658
GNDA GNDB GNDC
4
6
7
R228
R230
1k
TCXO 1.0 PPM
270
+6V
17.5 MHz
R312
10
L 218
C251
R248
.1uH
.01
2.7k
+15V
U210
8
LM78L12
V IN
C253
C363
+ C364
R249
.01
.001
1.5
GND A
GND B
GND C
3.3k
C254
2
100pF
3
6
+12V
R250
R251
R294
270
3.3k
10
+6V
R274
R293
C274
R311
L222
10
51
27pF
4.3k
R273
L 219
C258
C356
C310
EP206
C275
R275
100
.018uH
27pF
2pF
27pF
3.3pF
6.8k
Q208
Q214
3636
3636
C260
C272
27pF
R279
R290
18pF
1.6k
1.5k
C261
3.3pF
Q209
Q215
C273
3636
3636
27pF
R291
36
1.3k
R300
C335
C334
R277
R278
R292
36
27pF
150
1.6k
75
27pF
L220
FREQ
ADJ
SOURCE
+12V
C268
+15V
U207
1.5pF
LM78L12
1
V IN
V OUT
+ C292
C291
+ C294
+12V
.001
1.5
GND A
GND B
GND C
GND
2
3
6
7
NOTES:
1. ALL RESISTORS ARE IN OHMS AND ALL CAPACITORS
IN MICROFARADS
UNLES OTHERWISE SPECIFIED.
March 1999
Part No. 001-2009-600
RX
+12V
+ C213
C212
C321
R313
4.7
.01
.001
220
R208
IF AMP
52.95 MHz
1.8k
4-POLE
C210
CRYSTAL FILTER
10pF
Q202
C214
3602
7.5pF
C270
10pF
Z201
Z202
C293
L213
C262
R209
R211
C211
C374
.01
.82
4.3pF
680
51
.01
1.5-5pF
L209
L211
16
U202
MIXER IN
MC3371D
MIXER
OSC B
GND
IF IN
Vcc
DEC 1
DEC 2
OUT
5
4
6
1
15
3
450 kHz
5
1
C217
Z205
.1
3
2
4
C221
.1
10
TRIPLER
+ C232
C233
4.7
.01
C235
C237
C222
52.5 MHz
220pF
5.6pF
120pF
C236
L215
L216
C238
220pF
.1uH
.1uH
390pF
C234
.01
SOURCE
+12V
1
V
OUT
+ C365
C366
EP204
4.7
.001
GND
EP202
7
R283
R258
100
100
R297
220
CR205
C282
27pF
5.6V
+ C279
CR206
C278
R257
5.6V
27pF
4.7
100
R298
R265
100
1k
C277
R296
6.8pF
1k
Q217
4098
C288
Q216
C263
3604
6.8pF
3.9pF
R266
C271
R295
220
5.6pF
390
C323
.001
+15V
SOURCE
R314
R301
R302
+6V
220
220
220
U208
8
1
LM78L05
V OUT
V IN
+ C297
+ C299
C296
R304
C300
.001
1.5
240
4.7
.001
GND A
GND B
GND C
GND
2
3
7
6
R303
+ C298
43
4.7
C295
C317
C318
C322
4.7
.001
.001
.001
.001
52.95 MHz
4-POLE
C216
C338
CRYSTAL FILTER
5.6pF
.01
C215
C301
5.6pF
39pF
Z203
Z204
C264
L230
R322
C375
4.3pF
.82
560
1.5-5pF
L225
U203A
3
MC3317B
TP3
1
R212
C218
2
+
100k
.001
R261
13
METER
5k
R213
R280
R323
R263
5.1k
100k
0
240k
9
AUDIO
QUAD
C220
C367
.001
7
8
+5V
27pF
U203B
C219
R214
R256
6
RX
MC3317B
Z213
TP4
.1
51k
20k
7
+12V
5
R215
+
1.8k
R264
R284
+ C240
5k
5k
4.7
C323
.001
RT101
R324
1k
10k
R262
10k
C284
R247
R255
TP5
U204A
1pF
1k
27k
3
33172
+
1
R254
C285
2
CR201
330k
.001
R252
330k
R253
6.8k
+ C281
L223
L224
4.7
C280
R286
5.6pF
L212
L210
18
R287
R285
300
300
SOURCE
RECEIVE
+12V
+15V
U206
1
8
LM78L12
V OUT
V IN
C311
C312
C321
C290
+ C289
+ C287
C286
.001
.001
.001
.001
4.7
1.5
.001
GND A
GND B
GND C
GND
2
3
6
7
C315
C319
.001
.001
RECEIVER SCHEMATIC
FIGURE 10-16
J201
7 RSSI
9 RX WBAND
13 RX INJ TP
1 +15V
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