Kenwood TKR-740 Service Manual page 22

TKR-740
3.1. Internal I/ O Terminal Description
Terminal Name
B Power Source
GND GND
TXI TX audio output to optional board
TXO TX audio input from optional board
RXI RX audio output to optional board
RXO RX audio input from optional board
DETI Discriminator output to optional board
DETO Discriminator input from optional board
ANI TX ANI input
PTTI PTT output to optional board
PTTO PTT input from optional board
TESTI Ext.PTT output to optional board
TESTO Ext.PTT input from optional board
RPTTI Remote PTT output to optional board
RPTTO Remote PTT input from optional board
OPTION Enable/Disable scrambler board
CODE1 Scrambler code setting
CODE2 Scrambler code setting
CODE3 Scrambler code setting
CODE4 Scrambler code setting
3.2. Connection to Optional Boards
Terminal Name
B
GND
TXI
TXO
RAI
RAO
DETI
DETO
ANI
PTTI
PTTO
TESTI
TESTO
RPTTI
RPTTO
OPTION
CODE1
CODE2
CODE3
CODE4
AUX I/O
AUX I/O
SPM
22
APPLICATION NOTE
Description
SC20-460(Transcrypt)
+V
GND
TXIN *1
TXOUT *1
RXOUT *2 SIDE TONE
RXIN *2
(RXOUT) *3
(RXIN) *3 DATA IN
PTT
(PTT) *6 (KEY)
(PTT) *7 (KEY)
SCRAMBLE
Binary 1
Binary 2
Binary 4
Binary 8
I/ O
O 13.2V
O 35mVrms @ 2.4kHz Deviation
I
O 200mVrms @ 1kHz Mod 60% Dev
I
O 170mVrms @ 1kHz Mod 60% Dev
I
I 15mVrms input
O Mic PTT ON ; 0V OFF ; 5V
I
O Ex PTT or TEST SW ON ; 0V OFF ; 5V
I
O Remote PTT ON ; 0V OFF ; 5V
I
O Scrambler ON ; 5V
Scrambler OFF(normally) ; 0V
O 0V or 5V
O 0V or 5V
O 0V or 5V
O 0V or 5V
CDEU-1(Cimarron)
+B
GND
*4
DATA OUT
PTT *5
KEY *5
(PTT) *6
*6
(PTT) *7
*7
EMER *8
CH BUSY *9
MUTE *10
Level
ID-12(CSC)
Power Supply
GND
AUDIO OUT
PTTIN *5
PTTOUT *5
(PTTIN) *6
(PTTOUT) *6
(PTTIN) *7
(PTTOUT) *7