Kenwood TS-990S Operation Manual - Page 24
Terminal Descriptions, Com Connector, Remote Connector
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1 INSTALLING AND CONNECTING THE TRANSCEIVER TERMINAL DESCRIPTIONS ab c d e COM CONNECTOR fg hi Pin No. 1 2 3 4 5 6 7 8 9 Pin Name NC RXD TXD NC GND NC RTS CTS NC Function No connection Sends the serial data to a PC. Receives the serial data from a PC. No connection Ground No connection 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. 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. No connection Input/Output - O I - - - I O - REMOTE CONNECTOR GND GND: Connecting to the metal shield. Pin No. 1 2 3 4 5 6 7 Pin Name SPO COM SS MKE BRK ALC RL Function 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.) {page 16-31} {page 16-32} Input/Output O I/O I I/O I/O I O 1-10 Index Contents
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