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UHF2 Schematics, Board Overlays, and Parts Lists
9.3-25
6816985H01-B
August 16, 2007
Figure 9.3-24. PMLE4427A/ PMLE4427B VCO Schematic
NU
NU
NU
9.31nH
NU
NU
390nH
L251
20
L254
390nH
R293
R258
7.5
100pF
C295
L275
0.10uF
4.6VSF_OUT
4.6VSF_VCO
22nH
C251
22pF
L276
4.6VSF_VCO
C277
4
1
CI
G
O
L
_
C
C
V
8
1
L255
11.87nH
7
SUPER_FLTR
3
19
TRB_IN
TX_BASE
16
15
TX_EMITTER
TX_IADJ
1
TX_OUT
10
TX_SWITCH
13
S
R
E
F
F
U
B
_
C
C
V
1
1
G
A
L
F
_
D
N
G
9
CI
G
O
L
_
D
N
G
7
1
PRESC_OUT
12
5
RX_BASE
RX_EMITTER
6
RX_IADJ
2
RX_OUT
8
RX_SWITCH
U250
COLL_RFIN
4
FLIP_IN
20
S
R
E
F
F
U
B
_
D
N
G
0
R251
50U56
VCOBIC
R296
0
30
C255
10pF
390nH
R271
10K
L273
D251
R252
D254
D253
C292
100pF
R255
1K
C282
4.3pF
0
R257
R270
120
R254
270K
D271
C266
R291
30
C262
L274
18nH
4.6VSF_VCO
100pF
C296
L259
47nH
2.0pF
C263
R266
330
TP299
TEST_POINT
1
330
R294
100pF
200
R272
390nH
C250
C293
100pF
L250
Q251
1.2pF
R298
C267
390nH
L252
C257
0.1uF
10K
R295
C271
2.0pF
4.6VSF_VCO
C256
11pF
R275
200
C259
11pF
C278
56pF
R276
10K
330pF
C286
27nH
L258
2.0pF
C254
C294
Q250
TEST_POINT
TP291
1
R278
12K
4.3pF
L271
C281
C276
390nH
4.6VSF_OUT
5.6pF
C273
4.7pF
D270
R259
330
R274
0
4.6VSF_VCO
20
C280
R299
4.3pF
D252
R253
15K
TP297
TEST_POINT
1
R297
L270
1
390nH
TP296
TEST_POINT
D273
L266
68nH
C272
4.3pF
C261
100pF
D272
200
R273
C253
2.7pF
330pF
C258
4.6VSF_VCO
Tx_SW
TRB
Rx_SW
RX_LO_IN
TXRF_OUT
Rx_SW
Tx_SW
PRES_IN
VCTRL
Summary of Contents for ASTRO MT 1500
Page 4: ...iv Table of Contents August 16 2007 6816985H01 B Notes ...
Page 164: ...August 16 2007 6816985H01 B 5 6 Troubleshooting Procedures Operational Error Codes Notes ...
Page 188: ...August 16 2007 6816985H01 B 6 1 24 VHF Troubleshooting Charts Secure Hardware Failure Notes ...
Page 212: ...August 16 2007 6816985H01 B 6 2 24 UHF1 Troubleshooting Charts Secure Hardware Failure Notes ...
Page 236: ...August 16 2007 6816985H01 B 6 3 24 UHF2 Troubleshooting Charts Secure Hardware Failure Notes ...
Page 710: ...9 2 40 UHF1 Schematics Board Overlays and Parts Lists August 16 2007 6816985H01 B Notes ...
Page 806: ...9 5 32 900MHz Schematics Board Overlays and Parts Lists August 16 2007 6816985H01 B Notes ...
Page 816: ...Index 4 August 16 2007 6816985H01 B Notes ...
Page 817: ......