SPP-933/934
SECTION 5
DIAGRAMS
5-1.
BLOCK DIAGRAM – BASE UNIT Section (1/2) –
– 19 –
– 20 –
QUAD COIL
SCAN
CONTROL
1st
MIXER
2nd
MIXER
LOCAL OSC
BUFFER
LOCAL
OSC
PHASE
DETECTOR
LOCK
DETECTOR
B.P.F.
FT301
RF AMP
Q301
TX AMP
Q306, 307
TX B+
SWITCH
Q302
IF AMP
Q1
TX
VCO
RX VCO
Q312
VCO
(RX SYSTEM)
PREAMP
Q2
LEVEL SHIFT
Q5, 6
MIX
OUT
ANT701
(ANTENNA)
FT1
10.555MHz
MIX
IN
LIM
IN
MIX
OUT
16
5
LIMITER
AMP
SQUELCH
TRIGGER
WITH
HYSTERESIS
AF
AMP
EXPANDER
CIRCUIT
COMPRESSOR
CIRCUIT
FILTER
AMP
DE-
MODULATOR
EPI
CO
CPI
DISCRI
VOLTAGE
L3
TX
FREQUENCY
CT1
TX
POWER
RT301
SQ
SENSITIVITY
RT1
MODULATION
SENSITIVITY
LEVEL SHIFT
Q8
RT3
TEL
OUT LEVEL
RT2
AF
OUT
B+ (3V)
FIL
IN
SQ IN
FIL
OUT
9
EO
(Pege 21)
(Pege 21)
TX
RX
10
11
5
7
12
8
PD2
PROGRAM-
MABLE
DIVIDER
LATCH
SI
CPS
PLL DATA
PLL CLK
PLL EN
17
15
16
13
12
11
3
SYSTEM CONTROLLER
IC8 (1/2)
2nd MIXER, LIMITER AMP, DET,
AF AMP, SQUELCH CONTROL
IC3
1st MIXER, VCO, PLL SYNTHESIZER
IC302
EXPANDER, COMPRESSOR
IC1
TX MUTE 17
RX MUTE 36
05
• SIGNAL PATH
: RX
: TX
: BELL
PROGRAM-
MABLE
DIVIDER
PROGRAM-
MABLE
DIVIDER
1/32, 1/33
PRESCALER
L.P.F.
SQ IN
DA
TA
IN
MUTE C
MUTE E
RST
XIN
XOUT
TX B+
(3V)
X1
10.1MHz
D303
D302
OSC
OSC
RXE
RXB
MIX
IN
DA
TA
OUT
DA
TA
EN
47 48
20
2
11
18
10
9
10
18
13
1
2
20
21
13
FT2
455kHz
3
24
PHASE
DETECTOR
VCO
(TX SYSTEM)
2 DOUBLER
TX AMP
PD1
LATCH
1/2
LATCH
1/16, 1/17
PRESCALER
OSC &
1/2 DIVIDER
PULSE
COUNTER
SHIFT
REGISTER &
LATCH
L.P.F.
PREANP
PREAMP
LIMITER
MUTE
MUTE
TXE
TXB
7
TX
OUT
2
5
4
14
LOCK
A
B
Содержание SPP-933 - 900mhz Cordless Telephone
Страница 3: ... 3 SECTION 1 GENERAL This section is extracted from instruction manual ...
Страница 4: ... 4 ...
Страница 5: ... 5 ...
Страница 6: ... 6 ...
Страница 7: ... 7 ...
Страница 8: ... 8 ...
Страница 27: ... 35 SPP 933 934 5 10 SCHEMATIC DIAGRAM BASE KEY Section Page 32 ...