SPP-N1023
13
13
SECTION 4
DIAGRAMS
4-1.
BLOCK DIAGRAM – BASE UNIT Section –
RX DATA
RLL DATA
RLL CLK
RLL EN
CAR DET
TX DATA
9
10
11
24
23
22
20
1
2
34
31
21
20
26
27
28
19
23
24
33
4 3 2 1 44
21
13
14
10
9
25
12
3
2
1
4
16
4
5
AF AMP
(FOR RX)
U2 (2/4)
AF AMP
(FOR DTMF)
U2 (3/4)
CHARGE
DETECT
Q3, 4
+5V
REGULATOR
U5
RESET SIGNAL
GENERATOR
Q5, 6
+
–
CHARGE
TERMINAL
DC IN 9V
–
+
J3
29
30
14
AF AMP
(FOR TX)
U2 (1/4)
BUFFER
Q1
LINE
J1
HOOK ON/OFF
U1
B+ (+5V)
D3
D1
D4
D2
T1
LINE TRANSFORMER
FREQUENCY SHIFT
KEYING DEMODULATOR
U3
X1
3.58MHz
B+
(+5V)
A1
RF UNIT
+
SYSTEM
CONTROLLER
U4
D7, 8
ANT
LINE TX
RX DATA
PLL DATA
PLL CLK
TX DATA
LINE RX
PLL EN
CAR DET
DTMF
OUT
XIN
XOUT
IN SE
IN P
IN N
M DAT
SCK
SD IN
INT
DCB RD
DC COMPA
SD OUT
IN DSP
IN DCN
RX DATA
PLL DATA
PLL CLK
PLL EN
CAR DET
TX DATA
PAGE
IN USE-LED
CHARGE-LED
DO
CLK
CS
DI
OFF HOOK
PARK
FST CHG
RESET
DI
CLK
CS
DO
RX DATA
PLL DATA
PLL CLK
PLL EN
CAR DET
TX DATA
DCB RD
DCA
CIDINT
CIDSDA
CIDSCL
SI
X2
8MHz
HANDSET
LOCATOR
SW1
NEW CALL
POWER
LED2
8 NEW CALL-LED
LED3
EEPROM
U6
B+ SWITCH
Q2
CHARGE
CONTROL
Q7, 8
16
15
XOUT
XIN
• SIGNAL PATH
: TX
: RX
LINE
LED6
CHARGE
LED1
