Connection To An External Antenna Tuner At-300; Connection To A Tnc, Mcp, Etc - Kenwood TS-990S Instruction Manual

1 INSTALLING AND CONNECTING THE TRANSCEIVER

CONNECTION TO AN EXTERNAL ANTENNA TUNER AT-300

The external antenna tuner AT-300, can be connected to the ANT1 connector and AT connector.
The AT-300 does not function if it is connected to a connector other than the ANT1 connector. The AT connector is
dedicated for AT-300. Other external antenna tuners cannot be controlled. If another external antenna tuner is connected
to the transceiver, use the TX tuning function.
Note:
◆ Connect the AT-300 to the transceiver after the main power (I/O) shuts down.
◆ The AT-300 cannot be used in the 50 MHz band. The antenna for the 50 MHz band must be connected to an antenna connector other than
antenna connector 1 (ANT1).
◆ Connecting the AT-300 to the AT connector using the ANT 1 results in the signal bypassing the internal antenna tuner (through).
◆ If you connect the AT-300 to the AT terminal, the transmit power will be limited to 100 W. (Depending on the specifications for AT-300)
◆ The AT-300 has been discontinued and is no longer available.
TS-990S

CONNECTION TO A TNC, MCP, ETC.

For packet communications, use an external TNC (terminal node controller) or MCP (multi-mode communication
processor) terminal, or the sound capability in a PC. For digital communications such as RTTY, PSK and SSTV, use the
ACC2 connector on the rear panel of the transceiver.
• Use a cable with a 13-pin DIN plug to connect the transceiver to an external device such as a TNC, MCP or a PC having sound
capability.
• To connect the PC to a TNC or MCP, use a commercially available RS-232C cable.
Note:
◆ To avoid any noise interference, keep the distance between the transceiver and a PC as great as possible.
◆ The external device can be connected to the ACC 2 connector with the self-made cable.
PC
1-8
{page 9-14}
ANT 1 connector
Power Supply
Unit for TNC
and MCP
TNC/ MCP
AT-300
TS-990S
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