Schematics, Board Overlays, and Parts Lists
: Transceiver (RF) Boards
8-69
6881094C31-E
November 16, 2006
Figure 8-46. NLE4278D UHF Range 1 Frequency Generation Unit (VCO) Circuit
50U54
TX1 VCO
TX2 VCO
RX1 VCO
RX2 VCO
VSF
L321
100nH
390nH
L303
TX_IADJ
10
TX_OUT
13
TX_SWITCH
14
S
R
E
F
F
U
B
_
C
C
V
18
CI
G
O
L
_
C
C
V
NE68519
Q302
RX_EMITTER
2
RX_IADJ
8
RX_OUT
7
RX_SWITCH
3
SUPER_FLTR
19
TRB_IN
16
TX_BASE
15
TX_EMITTER
1
4
COLL_RFIN
20
FLIP_IN
11
S
R
E
F
F
U
B
_
D
N
G
9
G
A
L
F
_
D
N
G
CI
G
O
L
_
D
N
G
17
12
PRESC_OUT
5
RX_BASE
6
U300
VSF
L317
390nH
120pF
C336
VSF
390nH
L318
22
R314
1
2
C331
3.9pF
D311
L320
27nH
47
R315
R309
20K
18
R306
3.3pF
C333
220
390nH
L302
D303
1
2
R302
L305
390nH
R311
22K
1
2
R304
22
D312
1SV279
R325
22K
1.5pF
R323
20K
D
G
S
C332
Q310
Q305
TN0200T
0.1uF
C313
1
2
1
2
D313
D315
L313
33nH
120pF
C316
VSF
NE68519
C307
120pF
Q304
D306
1
2
NE68519
Q303
D305
1
2
R312
33
3.6pF
C306
8.2pF
C340
1SV279
1
2
120pF
C327
D316
20K
R317
NC
L306
390nH
VSF
300
R307
120pF
C326
22K
R319
22pF
C308
C329
120pF
220
R324
2
D309
1
2
D310
1
22K
R303
R327
51K
NC
51K
R322
51K
R316
D
G
S
R321
Q307
TN0200T
D320
330
C312
10pF
1.8pF
120pF
C305
C309
20K
R301
1SV279
D304
1
2
C303
1.8pF
C323
VSF
C324
3.3pF
1.5pF
3pF
C330
8.2pF
C319
R308
300
C341
3.6pF
C304
3.3pF
L304
390nH
3pF
R305
51K
VSF
L309
22nH
8.2pF
C335
R326
VSF
L315
390nH
22
D307
1
2
NE68519
Q301
1
2
390nH
NC
D314
3pF
C321
L301
3.6pF
C311
Q311
VSF
5.6K
R332
22
R313
2.4pF
C310
D308
1
2
NC
4.7pF
C322
NC
L310
22nH
R310
220
R318
220
3.3pF
C314
L311
18nH
120pF
C317
C320
L312
390nH
D
G
S
120pF
Q306
TN0200T
R333
220
C328
8.2pF
S
3.9pF
C302
Q308
TN0200T
D
G
L307
390nH
R320
22
L314
68nH
D302
1
2
NC
C318
120pF
390nH
L316
1
2
390nH
L308
VCTRL
TXRF
RXLO
AUX4
TX1EN
AUX3
D301
AUX1
TX2EN
PRESC
RX2EN
AUX2
RX1EN
Summary of Contents for ASTRO XTS-5000
Page 7: ...vi Table of Contents November 16 2006 6881094C31 E Notes ...
Page 11: ...x List of Figures November 16 2006 6881094C31 E Notes ...
Page 17: ...November 16 2006 6881094C31 E xvi CommercialWarranty Notes ...
Page 31: ...November 16 2006 6881094C31 E xxx Portable Radio Model Numbering System Notes ...
Page 83: ...November 16 2006 6881094C31 E 3 44 Theory of Operation Encryption Module ...
Page 135: ...November 16 2006 6881094C31 E 5 44 Troubleshooting Charts Secure Hardware Failure Notes ...
Page 175: ...November 16 2006 6881094C31 E 7 32 Troubleshooting Tables List of Board and IC Signals Notes ...
Page 367: ...November 16 2006 6881094C31 E Glossary 10 Notes ...
Page 373: ...Index 6 November 16 2006 6881094C31 E Notes ...