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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.

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Press and hold [ATT (RX ANT)] to toggle the RX ANT between enabled and disabled.

•“” appears when the RX ANT is enabled.

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Press and hold [METER (DRV)] to switch the DRV between enabled and disabled.

Use the standard input of 1 mW for the linear amplifier and other connections.

•“” appears when the DRV is enabled

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.

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:

XConnect 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.

XThe RX ANT can be used with less than 30 MHz.

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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.

1Press [MENU], then press [Q-M.IN]/ [Q-MR]or turn the MULTI/CH control to access Menu No. 78.

2Press [M.IN]/ [SCAN (SG.SEL)] to select the APO time from “oFF”, “60”, “120”, or “180” minutes.

3Press [MENU] to exit Menu mode.

Note:

XThe APO function works even if the transceiver is scanning.

XThe APO timer starts counting down when no key presses, no control adjustments, and no command (COM connector) sequences are detected.

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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.

1Select the transmit frequency.

2Press 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.

3Press 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.

•If the SWR of the antenna system is extremely high (more than 10:1), an alarm (“SWR” in Morse code) sounds and the internal antenna tuner is bypassed. Before attempting to tune again, adjust the antenna system to lower the SWR.

4Monitor the display and check that tuning has successfully finished.

•If the tuning was successful, “” stops blinking and the red TX-RX LED turns OFF.

•If tuning does not finish within approximately 20 seconds, an alarm (“5” in Morse code) sounds. Press [AT (TUNE)] to stop the alarm and tuning.

•If you want the transceiver to stay in transmission mode after the tuning completes, access Menu No. 51 and select “on”.

•To pass received signals through the internal antenna tuner, access Menu No. 52 and select “on”. When this function is ON, “” appears. This may reduce interference on the receive frequency.

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