Terminal Descriptions; Com Connector; Remote Connector - Kenwood TS-990S Instruction Manual

1 INSTALLING AND CONNECTING THE TRANSCEIVER

TERMINAL DESCRIPTIONS

COM CONNECTOR

Pin No. Pin Name
1 NC No connection
2 RXD Sends the serial data to a PC.
3 TXD Receives the serial data from a PC.
4 NC No connection
5 GND Ground
6 NC No connection
Sends from a PC to the transceiver. If the PC cannot accept serial data, the PC sends the "L" state
7 RTS
signal to disable the transceiver from sending serial data.
Sends from the transceiver to a PC. If the transceiver cannot accept serial data, the transceiver sends
8 CTS
an "L" state signal to disable the PC from sending serial data.
9 NC No connection

REMOTE CONNECTOR

Pin No. Pin Name
1 SPO
2 COM
3 SS
4 MKE
5 BRK
6 ALC
7 RL
1-10
Speaker output
Common terminal of the linear amplifier control relay
PTT Input
• Shorting the SS terminal to Ground starts transmission.
The make terminal of the linear amplifier control relay
• Advanced Menu 11 "Linear Amplifier Control (HF Band)" and Advanced Menu 12 "Linear
Amplifier Control (50 MHz Band)" enable the MKE terminal to short to the common terminal
during TX. {page 16-31} {page 16-32}
The break terminal of the linear amplifier control relay
• Shorts to the common terminal when the MKE terminal is not shorted to the common
terminal. {page 16-31} {page 16-32}
ALC input from the linear amplifier
Linear amplifier control output
• Advanced Menu 11 "Linear Amplifier Control (HF Band)" and Advanced Menu 12 "Linear
Amplifier Control (50 MHz Band)" enable to configure the status during TX.
Active High : During TX, outputs 12V DC. (10mA max.)
Active Low : During TX, becomes "Low" level. (Shorted to GND) During RX, becomes "High" level
when an external bias voltage is fed. (+15V DC 10mA max.)
ab c d e
f g h i
Function
b
d e
a c
f g
Function
{page 16-31} {page 16-32}
Input/Output
—
O
I
—
—
—
I
O
—
Input/Output
O
I/O
I
I/O
I/O
I
O
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