Kenwood TS-990S - Manual (Page 24)

1-10
1 INSTALLING AND CONNECTING THE TRANSCEIVER
Index Contents
TERMINAL DESCRIPTIONS
ab c d e
f g h i
COM CONNECTOR
Pin No. Pin Name Function Input/Output
1 NC No connection —
2 RXD Sends the serial data to a PC. O
3 TXD Receives the serial data from a PC. I
4 NC No connection —
5 GND Ground —
6 NC No connection —
7 RTS
Sends from a PC to the transceiver. If the PC cannot accept serial data, the PC sends the "L" state
signal to disable the transceiver from sending serial data.
I
8 CTS
Sends from the transceiver to a PC. If the transceiver cannot accept serial data, the transceiver sends
an "L" state signal to disable the PC from sending serial data.
O
9 NC No connection —
a
b
c
d e
f g
REMOTE CONNECTOR
Pin No. Pin Name Function Input/Output
1 SPO Speaker output O
2 COM Commonly used for an internal relay I/O
3 SS
PTT Input
• Shorting the SS terminal to Ground starts transmission.
I
4 MKE The make terminal for an internal relay. Shorts to the common terminal during transmission. I/O
5 BRK The break terminal for an internal relay Shorts to the common terminal during reception. I/O
6 ALC ALC input from the linear amplifier I
7 RL
+12 V DC with a maximum of 10 mA signal is sent during TX in the HF or 50 MHz band. Following
configuration in Advanced Menus 11 and 12, it is possible to short the signal with a maximum of 10
mA to the GND terminal. {page 16-31} {page 16-32}
O
a b c
d e f
EXT.AT CONNECTOR
Pin No. Pin Name Function Input/Output
1 GND Ground —
2 TT EXT.AT control (TTI/TTO) I/O
3 GND Ground —
4 NC No connection —
5 TS EXT.AT control (TSI/TSO) I/O
6 14S 13.8 V DC source for EXT.AT O