Figure 9-264.800 Mhz Synthesizer Schematic Diagram - Motorola HT Series Detailed Service Manual

9-420
C244
4 3
A3 K3
5 2
.01µF
A2 K2
6 1
A1 K1
C245
R200
D201 .01µF
100
C246
.01µF
4 3 C247
A3 K3
5 2
.01µF
A2 K2
R218
6 1
A1 K1
33K
D202
C208
C243
0.1µF
22pF
C212
R219
0.1µF
150
CLK
CSX
C219 MODIN
68pF
C221
C222
68pF
68pF
R221
1MEG
NU
C249
0.1µF
NU
PRESC C227
L203
6.8nH
68pF
VSF
C228
0.75pF
-20dBm RX VCO
-35dBm Second Harmonic RX VCO
-18.5dBm TX VCO
-33.5dBm Second Harmonic TX VCO
All values above are 'typical'
Measured with HP85024A
High Frequency Probe
SYNTHESIZER TOP SHIELD
Figure 9-264. 800 MHz Synthesizer Schematic Diagram
C206 C207
2.2µF
0.1µF
5V
(SOURCE)
12.8V (Typical)
C203 C204
C209 C205
10µF 10µF 0.1µF .01µF
R222
0
R220
150
8
CLK FREFOUT
9
CEX
10
MODIN
7
DATA
DATA
30
SFIN
35
PVREF
C250
C223 21
VBPASS
0.1µF
68pF
40
NU
BIAS1 U201
39
BIAS2
26
SFCAP
27
SFBASE
32
PREIN
18
C242 R208
REFSEL
42
0.1µF
56K CCOMP
R206 C229
NU
ADAPTSW
30K 2.2µF 17
NC1
29
NC2
31
NC3
For crystal
C232 C233 C234
2.2 to 2.7V at room temp
68pF 1000pF 10µF
4.6V
SH201
SH202
R212
NU
SYNTHESIZER BOTTOM SHIELD
LI_ION B503
L200 B504
2.2µH
U247
1
GND
ERR SD
6 3
OUT IN
4 5
NR
2
C200
C202
C201
2.2µF
2.2µF
68pF
R223
0 L202
2.2µH
NU
C213 C214 C215 C216
0.1µF
2.2µF 0.1µF 68pF
23
XTAL1
24
XTAL2
19
16.8MHz
R202
41
MODOUT
3.9K
15
VMULT1 Q210
14
VMULT2 AUX4
12
VMULT3
11 1
VMULT4
48
AUX1
1 2
AUX2
2
C224
AUX3
3
AUX4
3 4
37 68pF
TEST1
38
TEST2 5V
43
IOUT
45
IADAPT
4
LOCK LOCK
46
28
SFOUT
C230 R214
16
TP201
INDMULT
25
68pF
WARP
47K
R211
47K
FL201
GND
IN OUT
C235 C236 C241
CR203
56pF 1.6pF 68pF
C237
330pF
C239
R213
100
.01µF
NOTE: REFERENCE OSCILLATOR COMPONENT USAGE DEPENDS ON FREQUENCY STABILITY
SEE REFERENCE OSCILLATOR PARTS PLACEMENT TABLE AND/OR PARTS LIST FOR DETAILS
800 MHz Circuit Board/Schematic Diagrams and Parts List (PCB 84860641Z02 / 8480641Z03 (Rev B)
L505
BATT_CODE BATT_ID SB3
390nH
VR503
6.8V
SB2
SWB+
U248
1 3
VIN ON_OFF*
2
4V_3.3V
GND
C210 C211
68pF
2.2µF
4 5
C217
2.2µF Vdda
Steering Line DC Voltage
3.3V
2 to 9V in RX mode
3 to 11V in TX mode
C218
TP202
0.1µF
R203
R204 C220
33
120 0.47µF
R5
C225
.047µF
C226
R209
.047µF
1.3K
R216 R217
R210
330
0
0
C231
L204
12µH
470pF
Q200
3 4
2
C240
1
.01µF
REFERENCE OSCILLATOR PARTS PLACEMENT
Y200
16.8MHz
1
VCON
2 4
Vdda
GND VCC
C238
OUT 0.1µF
3
PB503
VR506
C523
6.8V
.01µF
PB502
C522
VR505
.01µF
6.8V
EMER_1_FN EMER
RTA0_1_FN RTA0
RTA1_1_FN RTA1
RTA2_1_FN RTA2
RTA3_1_FN RTA3
SB1_1_FN SB1
PTT_1_FN PTT
VOL_1_FN VOL
MECHSWB+_1_FN MECH_SWB+
GREEN_LED_1_FN GREEN_LED
RED_LED_1_FN RED_LED
LVZIF_SEL
LVZIF_SEL_1_FN
DEMOD_1_FN DEMOD
RSSI_1_FN RSSI
VCTRL
AUX3_5V
REF 1.5 PPM 2.5 PPM
C235 OUT IN
C236 OUT IN
C237 OUT IN
C238 IN OUT
C239 IN OUT
C241 IN OUT
CR203 OUT IN
FL201 OUT IN
R211 OUT IN
R212 OUT OUT
R213 IN OUT
R214 IN OUT
Y200 IN OUT