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Motorola HT Series User Manual

Motorola HT Series
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800 MHz Circuit Board/Schematic Diagrams and Parts List (PCB 84860641Z02 / 8480641Z03 (Rev B) 9-421
13
TX_SWITCH
14
VCC_BUFFERS
18
VCC_LOGIC
8
RX_OUT
7
RX_SWITCH
3
SUPER_FLTR
19
TRB_IN
16
TX_BASE
15
TX_EMITTER
1
TX_IADJ
10
TX_OUT
20
FLIP_IN
11
GND_BUFFERS
9
GND_FLAG
GND_LOGIC
17
12
PRESC_OUT
5
RX_BASE
6
RX_EMITTER
2
RX_IADJ
U250
4
COLL_RFIN
0 dBm to RX_FE
6 dBm typical
to PA
1.9 V when selected
OPTIONAL BIAS TUNING VOLTAGE
Steering Line
2 to 11 VDC
VCO Select Line
0V for RX
5V for TX
1.225 GHz
1.9 V when selected
TX BUFFER
TX VCO Components
RX VCO Components
741 to 761 MHz
900 MHz
Freq Range
LEVEL SHIFT FOR VCO SELECT
Allows 3V logic from frac-N to control 5V logic of VCO
806 to 870 MHz
Freq Range
5 mA current draw
CHASSIS_CONTACTS
Switched supplies for VCOs
on this page
5V when selected
Supply from U201
4.6 V Super Filter
VSF
Rx_sw
DACRX
AUX3_5V
Tx_sw
RESET
U
NSWB+
CLK
CSX
DATA
TX_INJ
VCTRL
RX_LO
PRESC
AUX4
Rx_sw
Tx_sw
4
1
3
0.5pF
VCO TOP SHIELD VCO BOTTOM SHIELD
NU
C255
NU
0.5pF
C291
R255
330
L262
220nH
68pF
C263
2pF
C276
3pF
C266
M300
RESET_2_VCO
UNSWB+_2_VCO
CSX_2_VCO
DATA_2_VCO
CLK_2_VCO
33
R274
120
1pF
R273
C268
C256
1pF
Q251
L253
390nH
33
R272
R267
12K
CR251
L256
220nH
33
R270
CR252
1K
10K
4.7K
47K
47K
R257
.033uF
C289
270
R264
C260
68pF
270
U205
R250
0.5pF
C286
NU
C272
3.3pF
68pF
0.1uF
C273
R254
C280
47nH
47K
L265
2pF
C267
56pF
C284
NU
0.5pF
C283
33
R271
5.6pF
C277
C281
68pF
R256
0
R262
33
R268
22K
C257
68pF
30K
R265
68pF
100
C274
R251
C270
0.1uF
CR253
0.1uF
.033uF
C264
22nH
C269
L258
L261
0.1uF
C258
220nH
C288
18nH
NU
0.5pF
L252
L263
U206
220nH
100pF
C287
220nH
L260
270
R263
L250
6.8nH
R275
10
C282
68pF
C259
2.2uF
C275
C253
82pF
1.2pF
0.5pF
C279
SH251
R253
NU
R261
10
33
33nH
L254
C265
1.8pF
Q252
2
C254
68pF
L257
220nH
L264
220nH
L259
15nH
0.1uF
C285
3.9pF
30K
R266
C278
5.6pF
C271
C262
0.1uF
C290
SH250
56pF
R269
0
NU
FL0830732O
Figure 9-265. 800 MHz Voltage Controlled Oscillator Schematic Diagram

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Motorola HT Series Specifications

General IconGeneral
BrandMotorola
ModelHT Series
CategoryTwo-Way Radio
LanguageEnglish

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