29
•
Press PTT, check the Ig2 (
I
Screen on the display
). If it is ok (bellow +40mA ),
gradually increase the input power until the PA reaches about 70% of its maximum
output power.
•
Using the TUNE buttons, adjust for maximum FORWARD POWER while monitoring the
Screen current.
•
When the Screen current e60mA , adjust the LOAD button to decrease Screen
current to about 0 mA.
•
Increase the PA input power until you reach the desired maximum output power. Keep
watching the Screen current. If the Screen current e60mA decrease it by using
the LOAD button.
•
Repeat using the TUNE buttons to reach desired maximum FORWARD POWER and
check Screen current.
•
If the Screen current is lower than 0 mA (negative value), change it by pressing the
LOAD button until 0 mA is set and check again for maximum output power. Do not start
with very low input power, set abt. 50% before beginning M-tune process.
•
If you reached the desired maximum output power, and the PA Screen current is inside
0 / +40mA , then press the
SAVE
button.
Notice 1:
If the tuning process takes more than 1 minute, allow for a short break to prevent
temperature overloading of the PA.
Notice 2:
If you use the PA with the output power adjusted lower than the maximum settings ,
Screen current can take negative values. There is no need to readjust the PA, it is still working
in the linear mode.
We can now see a new small
yellow
USER
window in the touch
screen display.
USER
means that
we used the M-TUNE feature to
optimize the PA adjustment.
If you want to go back to the
default
factory
settings,
use
CLEAR USER SETTINGS in the
MENU settings (page 19) for one
band or all bands.
If the amplifier demonstrates any malfunctions during tuning or it does not behave in
accordance witch the M-TUNE procedure, interrupt the tuning procedure immediately
and check the amplifier! Be sure there are not any mistakes in choosing antennas, bands
or segments! Insure that VSWR is not higher than 3:1 and input power is LOW!
Type of supported TCVR and
working
frequency are visible on the
display.
AUTO LED is ON.
