Motorola Pro Series Elite - Page 148

UHF Band 2, Circuit Board/Schematic Diagrams and Parts List 8-7
Figure 8-7: UHF Band 2 Voltage Controlled Oscillator Schematic Diagram
TX_IADJ
1
TX_OUT
10
TX_SWITCH
13
VCC_BUFFERS
14
VCC_LOGIC
18
RX_EMITTER
6
RX_IADJ
2
RX_OUT
8
RX_SWITCH
7
SUPER_FLTR
3
TRB_IN
19
TX_BASE
16
TX_EMITTER
15
COLL_RFIN
4
FLIP_IN
20
GND_BUFFERS
11
GND_FLAG
917
GND_LOGIC
PRESC_OUT
12
RX_BASE
5
50U54
U241
Rx_sw
Tx_sw
C273
0.1uF
1.1pF
C272
L273
18nH
27nH
1pF
L271
C271
R245
240
C276
2.2uF
100pF
C281
390nH
L281
0.1uF
C286
100pF
C246
2.7pF
C245
120
R242
100pF
C285
R241
18
15K
R244
L243
RESONATOR
1
2
3
4.3pF
C250
4.3pF
C242
4.3pF
C243
12
CR243
A1 A2
CR241
C241
100pF
22nH
L242
390nH
L241
CR242
R243
10K
C244
3.6pF
Rx_sw
1
3
2 Q241
BFQ67W
30
R248
L282
390nH
C247
0.1uF
C248
100pF
R253
7.5K
Tx_sw
C253
1.5pF
100pF
C251
CR251
20pF
C252
390nH
L251
C254
3.3pF
R251
33
L253
RESONATOR
1
2
3
100pF
C289
100pF
C255
R252
270
R254
8.2K
1K
R260
4
1
3
Q261
2
10K
47K
47K
4.7K
2
4
1
3
Q260
C297
.01uF
10K
4.7K
47K
47K
1
SHIELD
SH242
1
SHIELD
SH241
VCO TOP SHIELD VCO BOTTOM SHIELD
AUX 4
AUX 3
5V
VSF
VSF
VCTR
L
PRESC
R
X_INJ
T
X_INJ
4.6V
2V
4.6V
3.5V@450MHz
9.5V@527MHz
Main Board, RF Section-- VCO
Issue:
Revision Detail:
Release Date:
ILLUSTRATOR REGIONDATE
Application :
MEDIA & COMMUNICATIONS DEPT.
DWG. NO.
EDITOR
DATE
Adobe Illustrator 7.0
WARIS UHF Band 2
PCB 8485641z01
Ramesh R.
27/04/1998
LN Chan
ZMY0130224
O
Penang
27/04/1998
Comments:
27/04/1999
Penang
Used in 6804110J64