INDEX Page. 33 of 89
4) Use of the Automatic Tuner (Internal ATU)
To complete the programing 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, prepare 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 (including, if possible, the two
immediately external sub-bands) of bands you wish to use.
• 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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