Kenwood TS-590SG Operation Manual - Page 60

12 OPERATOR CONVENIENCES ANTENNAS ANT 1/ ANT 2 Two antenna connectors are available for the HF/ 50 MHz band on the TX/ RX unit rear panel. Press and hold [PRE (ANT 1/2)] to select ANT 1 or ANT 2. • " " or " " appears to indicate which antenna is selected. Antenna Selection Frequency Range (MHz) 0.03 ~ 0.522 10.5 ~ 14.5 0.522 ~ 2.5 14.5 ~ 18.5 2.5 ~ 4.1 18.5 ~ 21.5 4.1 ~ 6.9 21.5 ~ 25.5 6.9 ~ 7.5 25.5 ~ 30.0 7.5 ~ 10.5 30.0 ~ 60.0 Note: Connect an external tuner to the ANT 1 connector only, then select ANT 1. The internal antenna tuner will be automatically bypassed when the transceiver is switched ON. RX ANT Press and hold [ATT (RX ANT)] to toggle the RX ANT between enabled and disabled. • " " appears when the RX ANT is enabled. DRV Press and hold [METER (DRV)] to switch the Drive output (DRO) or Antenna output (ANT) between enabled and disabled. Drive output : Use the standard input of 1 mW for the linear amplifier and other connections. • " " appears when the Drive output is enabled. Antenna output: The DRV terminal functions as an antenna output terminal for an external receiver. With this function, the RX signal that is input from the currently selected antenna (ANT1, ANT2, or RX ANT) is split in the middle, with one input to the RX circuit and the other output to the DRV terminal. • " " appears when the DRV (Antenna output) is enabled. Note: ◆ When you use the Antenna output function, due to the loss of the splitter, the receive sensitivity and gain decreases by approximately 3 dB. ◆ During transmission, the transmission output will leak a little through internal isolation (approximately -20 dBm at 50 MHz). ◆ The ON/OFF status of the Antenna output function is stored separately in the 50 MHz band and HF band. ■ Selecting the DRV Connector Function 1 Press [MENU], then press [Q-M.IN]/ [Q-MR] or turn the MULTI/CH control to access Menu No. 85. 2 Press [M.IN]/ [SCAN (SG.SEL)] to select "DRO" or "ANT". 3 Press [MENU] to exit Menu mode. The ANT 1, ANT 2, RX ANT, and DRV settings will automatically be stored in the antenna band memory. The next time you select the same band, the same antenna will be automatically selected. APO (AUTO POWER OFF) You can set the transceiver to switch OFF automatically if no keys or controls are pressed or adjusted for a certain period of time. One minute before the transceiver switches OFF, "CHECK" is output in Morse code. 1 Press [MENU], then press [Q-M.IN]/ [Q-MR] or turn the MULTI/CH control to access Menu No. 86. 2 Press [M.IN]/ [SCAN (SG.SEL)] to select the APO time from "oFF", "60", "120", or "180" minutes. 3 Press [MENU] to exit Menu mode. Note: ◆ The APO function works even if the transceiver is scanning. ◆ The APO timer starts counting down when no key presses, no control adjustments, and no command (COM connector) sequences are detected. AUTOMATIC ANTENNA TUNER As explained in "ANTENNA CONNECTION" {page 1}, matching the impedance of the coaxial cable and antenna is important. To adjust the impedance between the antenna and the transceiver, you have the choice of using the internal antenna tuner or an external antenna tuner. This section describes how to use the internal antenna tuner. For the external antenna tuner, consult the instruction manual that comes with the tuner. 1 Select the transmit frequency. 2 Press and hold [PRE (ANT 1/2)] to select " " or " ". • If the external antenna tuner (AT-300) is connected to the ANT 1 connector, select ANT 2 to use the internal antenna tuner. The internal antenna tuner is automatically bypassed if the external antenna tuner is connected to ANT 1. 3 Press and hold [AT (TUNE)]. • CW mode is automatically selected and tuning begins. • " " blinks and the TX-RX LED lights red. • To cancel tuning, press [AT (TUNE)] again. 52