Figure 9.4-13. Pmlf4040F Frequency Generation Unit (Fgu) Schematic - Sheet 2 Of 3 - Motorola XTS 2500 Service Manual

9.4-14
VSF
C252 C281
3pF 1pF
R223
20K
C254 C255
L211
150nH
3pF 2.2pF
1
C257
D210
Y201 3.0pF
2004
2 960MHz
C258
33pF
C259
3.0pF
AUX1
C282
R221
Steering Line 0.10uF
51K
2 to 11 VDC
VCTRL
C269 C270
2.7pF 1.1pF
C271 C272
L217
150nH
1.8pF 2.2pF
1
D212
Y203
C274
2006
33pF
2 1110MHz
AUX4
Figure 9.4-13. PMLF4040F Frequency Generation Unit (FGU) Schematic – Sheet 2 of 3
February 14, 2012
R224
20K
Q211
R226
4.7
R228
180
L214
150nH
C244
33pF
Q210
VSF
C260 C262
2.7pF 1pF
C263 C264
L215
150nH
2.7pF 2.2pF
1
C265
D211
Y202 1.8pF
C267
2005
33pF
2 1025MHz
C268
1.8pF
VSF
AUX2
C284
R235
0.10uF
20K
R234
20K
Q215
R236
C273
1.8pF
18
R237
220
C275
1.8pF
SH203
L218
SHIELD
150nH
1
C296
33pF
Q214
C246
R232
0.10uF
51K
VCO TOP SHIELD
5V
DNP
R297
0
C224
C253
0.1uF
33pF
R225
33
VSF
1
R229 R230
TX_IADJ
20K 20K 2
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
150nH
VCO Select Line
0V for RX
5V
C297
33pF
Q212
R262
5.6K
R227
51K
Q218
AUX3
C283
R261
0.10uF
51K
SH205
SHIELD
1
VCO BOTTOM SHIELD
700/800 MHz Schematics, Board Overlays, and Parts Lists
R298
0
R220
330
C250
33pF
1
L210
150nH
C251
33pF 2
R222
10
C256
1
33pF
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 33pF
11 17
VSF
R238
100
R239
L219
24K
150nH
R289
33
L220
Q216
NE68519
C278 3
22nH
R241
2
33pF 0
1 1
R292 R243
33 30K
2
Q217
R244
51K
C261
IF209
RX_LO
33pF
PRESC
C276
33pF
C277
IF210
TX_INJ
L221
33pF
15nH
C279 C280
3.9pF 2.4pF
C245
33pF
6816985H01-F