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FLEX-6000 Signature Series – Maestro User Guide

24.3 MANUAL MODE

To operate the ATU in Manual mode, make sure the ATU MEM button in the TX Menu is unlit by

tapping it. ATU memories are enabled by default.

Tune the transmitter to the desired frequency. Press the ATU button to initiate an ATU tuning

operation. The ATU will set the power output to approximately 2W on 6m and 10W on all other

bands during the tuning operation. The ATU will tune until it either achieves a successful

impedance match or finishes in Bypass mode. Note that if the ATU determines that Bypass

provides the best match, and the resulting SWR is less than the criteria for success, this is

considered a successful tuning operation.

Tuning the transmit Slice to a frequency outside of the ATU Match Frequency Range or to a

different band will disable the ATU, putting it into Bypass mode. The ATU button will be off.

The ATU button will illuminate in red immediately after it is pressed, while the tuning operation is

in progress.

The ATU button will illuminate in green when a match is found resulting in an SWR less than the

match criteria for the band. This includes Bypass mode when the antenna system is well-matched.

If a good match cannot be found, the ATU button will be off. If a partial match is found – the ATU

can improve the match but can’t meet the criteria for a good match -- the ATU will remain engaged

with the partial match and the ATU button will be off.

24.4 MEMORY MODE

To operate the ATU in Memory mode, make sure the ATU MEM button in the TX Menu is lit by

tapping it. ATU memories are enabled by default.

Tune to the desired frequency. If the ATU has successfully tuned the selected antenna at or near

this frequency in the past, the ATU button will illuminate in green indicating the stored result has

been applied. This includes Bypass when Bypass is best. If the button is not lit, an acceptable

match is not stored, and the transmitter should not be used until the problem is corrected.

Pressing the ATU button will start a new tuning cycle and the results will replace the previously

stored results for that frequency. The ATU will set the power output to approximately 2W on 6m

and 10W on all other bands during the tuning operation. The ATU will tune until it either achieves a

successful impedance match or finishes in Bypass mode. Note that if the ATU determines that

Bypass provides the best match, and the resulting SWR is less than the criteria for success, this is

considered a successful tuning operation.

The ATU button will illuminate in green when a match is found resulting in an SWR less than the

match criteria for the band.

If a good match cannot be found, the ATU button will be off. If a partial match is found – the ATU

can improve the match but can’t meet the criteria for a good match -- the ATU will remain engaged

with the partial match and the ATU button will be off.

FlexRadio Signature FLEX-6000 Series User Manual

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