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Now try to press PTT (foot switch for
example).
We are in the transmit mode (without RF).
We have new button here.
M-TUNE
.
M-TUNE
means entry to the manual tuning mode. It allows fine tuning of PA, or in the case if automatic
tuning cannot set optimal adjustment of the PA. For proper adjustment we need to show
Screen
current (at least). Prior start M-tune define one bar graph to the Screen current, or define all bar graph
as in the next picture.
Press
M-TUNE
. New screen is visible. Slides on the left and right side represent both variable
capacitors.
Adjustment process
: Move
TUNE
left or right until maximum of
FWD
power reached. Then move
LOAD
carefully so that Ig2
Screen
current will be not higher than 20mA.
Optimum means maximum
FWD power and Screen current between 0– 20mA
for the full power output. Repeat more times.
After adjustment press
SAVE
for writing
values to the memory and press
EXIT
.
Repeat adjustment process for other
segments / bands.
Now one example from real situation. First we will check driving power from the transceiver. Stay in
STBY
mode, press
PTT
and apply
RF
power.
Type of supported TCVR and
working
frequency are visible on the
display.
AUTO LED is ON.
Type of supported TCVR and
working
frequency are visible on the
display.
AUTO LED is ON.