Kenwood TS-5700, Service Manual

Page: 22 / 91

TS-5700
24
CIRCUIT DESCRIPTION
• VS-3 Audio Signal Flow
The audio signal output from the VS-3 is not pro­
cessed by the DSP. The signal is amplified by the AF
amplifier and output to the speaker or headphone.
The VS-3 is controlled by the microcomputer.
µ C O M
C O N T R O L
V O I C E
VS-3
IC8
LA4446
SPEAKER
• Com m a nds and Data Tra nsferred to or from the
Microcomputer
Fig. 20 VS-3 audio signal flow
The commands sent from the microcomputer to
the DSP and data sent from the DSP to the microcom­
puter to indicate the microcomputer and DSP process­
ing are described below.
1 ) DSP com m a nds
Address (HEX) Bit (HEX) DSP-MCU
Accept Fun ction (Parameter)
C + O C O M
I R 02 Parameter proce s s i n g c o m m a n d (The D S P is c l e a red afte r t h e co m m a n d is executed . )
C : C o m m a n d
f-
Area base 0 C l e a r
Receive m o d e
pointer 1
_,
=0000 2 TX fi lter
3 Voice e q u a l izer
4 RX fi lter
5 CW pitch
6 Tra n s m it mode
7 AF VO L
8 N o i se/i nterfere nce e l i m i nation mode
9 S PAC correlation t i m e
A FM s u btone freq u e n cy
C + l
f-
Everyt i m e F l a g 1
0
1 S I C S i d eto n e ctl
0 : O F F , 1 : O N ( S i d etone permission)
2
3
D RT K D R U -3A microphone 0 : O F F , 1 : O N (Switch t h e microphone g a i n for D R U )
4 F D E V F M deviation 0 : N a rrow, 1 : Wide
5 CWBT CW t u n e 0 : O F F , 1 : O N
6 STC FM s u btone 0 : O F F , 1 : O N
7 P R C Processor 0 : O F F , 1 : O N
8
vox vox
0 : O F F , 1 : O N
C + 2
f-
Everyt i m e F l a g 1
0 L I T R C L i n e e n h a ncer trace 0 : O N , 1 : O F F
1 BCTRC Beat canceler trace 0 : O N , 1 : O F F
C + 3
f-
I R 02
TX mode
0-3 0 : SSB 1 : S L E E P 2 :
cw
3 : AM
4 : F M 5 : F S K 6 : S L E E P 7 : TEST
C + 4
f-
I R 02 RX mode
0 - 3 0 : S S B 1 : S L E E P 2 : CW 3 : AM
4 : F M 5 : F S K 6 : S LE E P 7 : T E ST
C + 5
f-
I R 02 TX f i lter
0-4
B a n d
C + 6
f-
I R 02 TX voice e q u a l izer
0 - 2
T X voice e q u a l i z i n g O N/O F F a n d selection
C+7
f-
IR02, MODE
RX S S B/AM fi lter 1
0 - 4
S S B/ A M l o w cut
C+8
f-
IR02, MODE
RX S S B/A M fi lter 2
0-4
SSB/AM
high cut