15 OPERATOR CONVENIENCES
•If the tuning was successful, “AT
” stops blinking and the MAIN band red LED turns off.
•If tuning does not finish within approximately 20 seconds, an alarm (“5” in Morse code) sounds. Press [AT/ ANT1/2] to stop the alarm and tuning.
If you access Menu No. 27 and select ON, received signals will also pass through the internal tuner.
When this function is ON, “
” appears. This may reduce interference on the receive frequency.
Note:
◆The internal tuner will not tune outside the available transmission frequency limits.
◆Pressing [AT/ ANT1/2] for more than one second while transmitting, interrupts transmitting and starts tuning.
◆If you would like to use a separate receiving antenna, access Menu No. 18 and switch it ON. When this function is ON, received signals bypass the internal antenna tuner.
◆While using CW Full
◆Tuning automatically turns OFF in approximately 60 seconds. “AT” disappears and the error beeps stop.
◆Tuning may still continue when the SWR meter indicates 1:1. This happens due to the tuning algorithm; this is not a malfunction.
◆Even though the SWR meter shows more than one segment, the internal tuner may not retune. This happens because of an SWR calculation algorithm tolerance between 10 W (approx.) transmit power for tuning and 100 W transmit power.
◆If tuning does not finish even though the SWR meter indicates smaller than 3:1, adjust the antenna system to lower the SWR, then attempt to tune again.
◆Tuning may not reach an SWR of 1:1, depending on the transceiver conditions.
■Presetting
After each successful tuning session, the AT Preset memory function stores the position of the tuning capacitor in the memory. The position of the capacitor is stored for each of the antenna tuner bands (see the following table) and for each antenna connector (ANT 1 and ANT 2).
Press [AT/ ANT1/2] momentarily.
•“AT
” will appear, showing that the internal tuner is
•Each time you go across the antenna tuner band, the AT Preset memory is automatically recalled to position the tuning capacitor without the need for retuning. If no preset data exists
for a particular band/antenna combination, then the default data of 50Ω is used.
Note: Tuning may restart in order to obtain the optimum matching condition even though the current antenna tuner band has the preset data.
AT Preset Frequency Range (MHz)
0.03 | ~ 1.85 | 1.85 | ~ 2.50 |
|
|
| |
2.50 ~ 3.525 | 3.525 | ~ 3.575 | |
|
|
| |
3.575 | ~ 3.725 | 3.725 ~ 4.10 | |
|
|
|
|
4.10 | ~ 7.03 | 7.03 | ~ 7.10 |
|
|
| |
7.10 | ~ 7.50 | 7.50 ~ 10.50 | |
|
|
|
|
10.50 | ~ 14.10 | 14.10 | ~ 14.50 |
|
|
|
|
14.50 | ~ 18.50 | 18.50 | ~ 21.15 |
|
|
|
|
21.15 | ~ 21.50 | 21.50 | ~ 25.50 |
|
|
|
|
25.50 | ~ 29.00 | 29.00 | ~ 30.00 |
|
|
|
|
30.00 | ~ 51.00 | 51.00 | ~ 52.00 |
|
|
|
|
52.00 | ~ 53.00 | 53.00 | ~ 60.00 |
|
|
|
|
ATTENUATOR
The attenuator function is useful when extremely strong signals exist nearby your receiving frequency. When these type of signals exist nearby your receiving frequency, the AGC function may be erroneously controlled by the strong signals, rather than by the target receiving signal. If this happens, the target receiving signal can be masked and buried by the strong signals. In this case, turn the Attenuator function ON.
1Press [ATT/ F LOCK].
2“ATT” appears.
To return to the normal operation, press [ATT/ F LOCK] again.
Note: If the same band is selected for both the main transceiver and the
AUTO MODE
You can configure a maximum of 29 points (HF/ 50 MHz), 9 points (144 MHz band), 9 points (430
(440)MHz band), and 9 points (1.2 GHz band) of the main transceiver VFO (VFO A and B) frequencies to change the operating mode automatically when you change the frequency.
As a default, the following modes are programmed on each operating band.
HF/ 50 MHz band
0.03~ 9.5 MHz: LSB
9.5MHz ~ 60 MHz: USB 144 MHz band
142 ~ 152 MHz: FM
430 (440) MHz band
420 ~ 450 MHz: FM
1.2GHz band (optional) 1240 ~ 1300 MHz: FM
To add the frequency points to the Auto Mode selection:
73