Figure 9.5-15. Pmlf4036A Frequency Generation Unit (Fgu) Schematic - Sheet 2 Of 3 - Motorola XTS 2500 Service Manual

9.5-16
Steering Line
2 to 11 VDC
VCTRL
C269 C270
2.2pF 1pF
C271 C272
L217
100nH
2.4pF 2.2pF
1
D212
Y203
C274
26C17
39pF
2 1110MHz
AUX4
Figure 9.5-15. PMLF4036A Frequency Generation Unit (FGU) Schematic – Sheet 2 of 3
February 14, 2012
VSF
C260 C262
2.2pF 1pF
C263 C264
L215
100nH
2.2pF 2.4pF
1
C265
D211
Y202 1.8pF
C267
RESONATOR
39pF
2 0MHz
C268
2.2pF
VSF
AUX2
C246
R235
.01uF
20K
R234
18K
Q215
R236
C273
1.8pF
22
R237
240
C275
1.8pF
SH203
L218
SHIELD
100nH
1
C296
39pF
Q214
C245
R232
.01uF
51K
VCO TOP SHIELD
5V
DNP
R297
0
L211
0
C224
C253
0.10uF
39pF
R225
33
VSF
1
R229 R230
TX_IADJ
2
18K 20K
RX_IADJ
3
SUPER_FLTR
4
Q213
COLL_RFIN
5
RX_BASE
6
R231 RX_EMITTER
16
TX_BASE
15
TX_EMITTER
18
20
FLIP_IN
19
R233
TRB_IN
220
9
L216
100nH
VCO Select Line
0V for RX
5V
C297
39pF
Q212
R262
5.6K
R227
51K
Q218
AUX3
C247
R261
.01uF
51K
SH205
SHIELD
1
VCO BOTTOM SHIELD
900MHz Schematics, Board Overlays, and Parts Lists
R298
0
R220
330
C250
39pF
1
L210
150nH
C251
39pF 2
R222
750
C256
1
39pF
L212
150nH
2
DNP
C231
33pF
14 18
L230
18nH
10
TX_OUT
8
RX_OUT
12
PRESC_OUT
U250
50U54 7
RX_SWITCH
C266
13
TX_SWITCH 39pF
11 17
VSF
R238
150
R239
L219
24K
150nH
R289
82
L220
Q216
NE68519
C278 3
27nH
R241
2
39pF 0
1 1
R292 R243
33 30K
2
Q217
R244
51K
C261
IF209
RX_LO
39pF
PRESC
C276
39pF
C277
IF210
TX_INJ
L221
39pF
18nH
C279 C280
1.5pF 2.0pF
C230
39pF
TX BUFFER
6816985H01-F