TK-80
20
5-12. Final unit control signal
The transmission LPF section signal and KAT-2 control sig-
nal to the final unit are output as serial data (Fig. 15).
5-13. AT unit control signal
Concerning the preset AT, based on the KAT-2 installation
signal (ATI), variable condenser position data (POD1, POD2)
and preset position data, the CPU controls the variable con-
denser drive motor rotation direction and rotation speed, us-
ing feedback control to ensure it stops at preset positions.
The tap signal from the tuning circuit is synthesized from the
transmit LPF selection signal from the final unit.
The KAT-2 does not tune below 2.0MHz, forcibly entering
the AT-through mode (Fig. 16).
3
4
5
UCK
UDA
FEN4
FEN4
CN3
CN3
Q7
Q5
Q6
Q8
Q9
Q10
Q11
SO
OE
Vdd
Q2
Q4
Q3
Q1
Q0
LCK
CLK
DATA
NC
Vss
20
11
10
1
5V
IC4
Band data decoder
LPF1
LPF2
LPF5
LPF6
18AT
FEN4
UCK
UDA
21AT
LPF3
LPF4
34
35
UCK
UDA
IC5
CPU
FINAL UNIT
CONTROL UNIT
8 bit false data bus
IC7
I/O port
7
28AT
24AT
LPF4 select
LPF1 select
LPF2 select
LPF5 select
LPF6 select
18AT select
LPF3 select
21AT select
24AT select
28AT select
IC5
CPU
IC7
I/O port
DGND
DGND
5A
14S
ATI
SPED
APRE
ATA
PR11
PR12
PR21
PR22
PR22
SPED
ATI
Vref
AVss
POD1
POD2
PR21
PR12
PR11
ATA
APRE
ATG
VREF
POD2
POD1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
36
9
57
69
70
72
73
37
38
39
41
40
5V
14V
CN6
The MAT-100 control signal is bi-directional and conducts
tuning while handshaking with the MAT-100 (Fig. 17).
5-14. Selective call unit control signal
Based on the KPE-1 installation signal, DTMF decode
data, FSK decode data and other data, the CPU transmits call
codes, turns AF muting on and off, etc.
IC7
I/O port
TSO
TTO
21
22
IC5
CPU
TSI
TTI
55
56
CN3
5V
TT
TS
1
2
Q5
Q3
Q6
Q4
CONTROL UNIT
Fig. 15
Final unit control signal
Fig. 16
KAT-2 control circuit
Fig. 17
MAT-100 conrol circuit
CIRCUIT DESCRIPTION
Содержание TK-80
Страница 62: ...TK 80 61 LEVEL DIAGRAM Local Oscillator Section ...
Страница 83: ...TK 80 76 INTERCONNECTION DIAGRAM ...
Страница 84: ...TK 80 77 INTERCONNECTION DIAGRAM ...
Страница 85: ......
Страница 103: ...TK 80 90 BLOCK DIAGRAM ...
Страница 104: ...TK 80 91 BLOCK DIAGRAM ...
Страница 105: ......