INDEX Page. 35 of 92
4) Use of the Automatic Tuner (Internal ATU)
To complete the programming it is necessary to match the antennas to the
amplifier by operating the “TUNE“ function (read the “TUNER“ chapter of
this manual).
Select each band (with the proper antenna) and then program the tuner for all
the sub-bands of every band.
Refer to the table in section 19 of this manual.
You are strongly advised to proceed with the utmost accuracy, not just match
the current frequency, but all the sub-bands of every band
Matching all the antennas on all bands that are available allows you to enjoy all
the features of the automatic linear.
To program the sub-bands, proceed as follows:
• For every band find the central frequency in the table of each sub-band (refer
to section 19 of this manual).
• Then set the transceiver to that frequency.
Next, set your transceiver to transmit a continuous tone (RTTY or FM).
• Now press the [TUNE] key and then activate the PTT of your transceiver. The
procedure for automatic tuning will start, you will hear the ATU relays operate
and when they stop, the SWR will be at a minimum.
Sometimes it is possible to improve the tuning by repeating this last step. The
use of the “MANUAL TUNE” sometimes helps.
• Repeat the previous steps for all sub-bands.
• Repeat the previous steps for the other antenna (if present) of the same
band after having selected it using the [ANT] key.
Note: If the ALC link is not used, it is very important to set the transceiver power to
about 30/40 Watts during the above operation.
The initial programming concludes after steps 1), 2), 3), 4).
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