Motorola HT Series Service Manual page 35
Professional series two-way portable radio
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Also See for HT Series:
- Service manual (146 pages) ,
- Detailed service manual (639 pages) ,
- Detailed service manual (96 pages)
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7KHRU\ RI 2SHUDWLRQ 9ROWDJH &RQWURO 2VFLOODWRU 9&2
DATA (U409 Pin 100)
CLOCK (U409 Pin 1)
CSX (U409 Pin 2)
MOD IN (U404 Pin 40)
+5V (U3711 Pin 4)
5,20,34,36
(U3201 Pin 5)
Reference
Oscillator
Voltage
Multiplier
9ROWDJH &RQWURO 2VFLOODWRU 9&2
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Table 2-6 on page 2-18
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WKH UHFHLYH RVFLOODWRU DQG WKH UHFHLYH EXIIHU RI 8 7KH 5) VLJQDO DW 8 SLQ LV URXWHG
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7
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DFWLYDWHV WKH WUDQVPLW 9&2 E\ HQDEOLQJ WKH WUDQVPLW RVFLOODWRU DQG WKH WUDQVPLW EXIIHU RI 8 7KH
5) VLJQDO DW 8 SLQ LV LQMHFWHG LQWR WKH LQSXW RI WKH 3$ PRGXOH 8 SLQ 7KLV 5) VLJQDO
LV WKH 7; 5) ,1-(&7,21 $OVR LQ WUDQVPLW PRGH WKH DXGLR VLJQDO WR EH IUHTXHQF\ PRGXODWHG RQWR
WKH FDUULHU LV UHFHLYHG WKURXJK 8 SLQ
7
DATA
8
CLK
9
CEX
10
MODIN
13,30
V
, DC5V
CC
U3701
V
, 3.3V
Low Voltage
DD
Fractional-N
23
XTAL1
Synthesizer
24
XTAL2
25
WARP
32
PREIN
47
VCP
VMULT2 VMULT1
14
)LJXUH 9+) 6\QWKHVL]HU %ORFN 'LDJUDP
Figure 2-14 on page 2-18
4
LOCK
19
FREFOUT
6,22,23,24
GND
43
IOUT
45
IADAPT
41
MODOUT
3
AUX4
2
AUX3
28
SFOUT
40
BIAS1
39
BIAS2
AUX1
15
48
Transistors
5V
Prescaler In
LQ FRQMXQFWLRQ ZLWK WKH /9 )UDF1
LOCK (U409 Pin 56)
FREF (U3220 Pin 21 & U404 Pin 34)
Steering
2-Pole
Line
Loop Filter
Voltage
Controlled
Filtered 5V
Oscillator
Dual
R405
LO RF
Injection
TX RF
Injection
(First Stage of PA)
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